阅读说明：本技术 一种透平发电机的强电控制检测系统 (Strong current control detection system of turbine generator ) 是由 丁慧 相丽娜 王伟晓 杨耀 于 2019-09-10 设计创作，主要内容包括：本发明提供了一种透平发电机的强电控制检测系统,其可方便进行调试,检测效率高,且可避免透平发电机损伤,安全性高；其包括三相四线制电源及连接于三相四线制电源上的控制单元、接于三相四线制电源上的供电单元,控制单元分为分别与供电单元相连接的润滑油泵电机控制单元、盘车电机控制单元、变频电机控制单元,润滑油泵电机控制单元包括润滑油泵电机,盘车电机控制单元包括盘车电机,变频电机控制单元包括变频电机,润滑油泵电机、盘车电机、变频电机均分别通过顺序连接热继电器、接触器、电流互感器、电流变送器、空气开关后电连接于三相四线制电源,与润滑油泵电机、盘车电机、变频电机上相连接的电流变送器分别对应与DCS控制系统相连接。(the invention provides a strong current control detection system of a turbine generator, which can be conveniently debugged, has high detection efficiency, can avoid damage of the turbine generator and has high safety; the control unit is divided into a lubricating oil pump motor control unit, a turning gear motor control unit and a variable frequency motor control unit which are respectively connected with the power supply unit, the lubricating oil pump motor control unit comprises a lubricating oil pump motor, the turning gear motor control unit comprises a turning gear motor, the variable frequency motor control unit comprises a variable frequency motor, the lubricating oil pump motor, the turning gear motor, the variable frequency motor is respectively and sequentially connected with a thermal relay, a contactor, a current transformer, a current transmitter and an air switch, and the current transmitter connected with the three-phase four-wire system power supply is respectively and correspondingly connected with a DCS control system.)

1. A strong electric control detection system of a turbine generator comprises a three-phase four-wire system power supply and a control unit connected to the three-phase four-wire system power supply, and is characterized in that: it still including connect in power supply unit on the three-phase four-wire system power, the control unit divide into respectively with lubricating oil pump motor control unit, barring motor control unit, the inverter motor control unit that power supply unit is connected, lubricating oil pump motor control unit includes the lubricating oil pump motor, barring motor control unit includes the barring motor, inverter motor control unit includes inverter motor, lubricating oil pump motor, barring motor, inverter motor divide equally and do not connect the electricity behind through connection in proper order thermal relay, contactor, current transformer, current transmitter, the air switch respectively in the three-phase four-wire system power, with be connected on lubricating oil pump motor, barring motor, the inverter motor current transmitter corresponds respectively and is connected with DCS control system.

2. A strong electric control detection system for a turbine generator according to claim 1, characterized in that: the thermal relays are divided into thermal relays FR1, FR2 and FR3, the contactors are divided into contactors KM1, KM2 and KM3, the current transformers are divided into current transformers A1, A2 and A3, the current transmitters are divided into current transformers DLB1, current transformers DLB2 and current transformers DLB3, and the air switches are divided into an air switch QF1, an air switch QF2 and an air switch QF 3; the lubricating oil pump motor is electrically connected with phase ends of L1, L2 and L3 of the three-phase four-wire power supply after being sequentially connected with the thermal relay FR1, the contactor KM1, the current transformer A1, the current transmitter DLB1 and the air switch QF1, the turning gear motor is electrically connected with phase ends of L1, L2 and L3 of the three-phase four-wire power supply after being sequentially connected with the thermal relay FR2, the contactor KM2, the current transformer A2, the current transmitter DLB2 and the air switch QF2, and the variable frequency motor is electrically connected with phase ends of L1, L2 and L3 of the three-phase four-wire power supply after being sequentially connected with the thermal relay FR3, the contactor KM3, the current transformer A3, the current transmitter DLB3 and the air switch QF 3.

3. A strong electric control detection system for a turbine generator according to claim 2, characterized in that: the alarm device further comprises an alarm unit and a heat dissipation unit which are connected to the three-phase four-wire system power supply in parallel, wherein the alarm unit comprises an air switch QF4, a relay KA3 and a buzzer ALLAE which are sequentially connected, the air switch QF4 is connected with the L3 phase end of the three-phase four-wire system power supply, and the buzzer ALLAE is connected with the N phase end of the three-phase four-wire system power supply; the heat dissipation unit comprises an air switch QF5, the air switch QF5 is connected between the L3 phase end and the N phase end of the three-phase four-wire system power supply, an illuminating lamp L1 and a fan MI are connected to the air switch QF5 in parallel, and a proximity switch K1 is connected between the air switch QF5 and the illuminating lamp L1.

4. A strong electric control detection system for a turbine generator according to claim 2, characterized in that: the power supply unit comprises air switches QF 6-QF 9, a transformer Y1 and fuses FU 1-FU 3, a 380 AC-to-24 DC electric transformer adopted by a transformer Y1, two ends of an incoming line of the air switch QF6 are respectively connected with L3 and N-phase ends of the three-phase four-wire system power supply, two ends of an outgoing line of the air switch QF6 are connected with two ends of an incoming line of the transformer Y1, and the air switches QF 7-QF 9 are respectively connected with an outgoing line end of the transformer Y1 after passing through the fuses FU 1-FU 3; the lubricating oil pump motor control unit is connected with 100 and 101 terminals of the air switch QF7, the barring motor control unit is connected with 200 and 201 terminals of the air switch QF8, and the variable frequency motor control unit is connected with 300 and 301 terminals of the air switch QF 9.

5. A strong electric control detection system of a turbine generator according to claim 4, characterized in that: the lubricating oil pump motor control unit further comprises intermediate relays KA1, time delay relays KT 1-KT 1, a selection switch SA1, an oil pump fault indicator lamp L1, an oil pump operation indicator lamp L1, button switches SB1 and SB1, a normally open contact FR1-1 of a heat relay FR1, a normally open contact KA1-1 of the intermediate relay KA1, a normally open contact KA1-2 of the intermediate relay KA1, a normally open contact KA1-1 of the intermediate relay KA1, a button switch SB1, a normally open contact KM1-1 of a contactor KM1, a normally closed contact KM1-2 of the contactor KM1 and one end of a lubricating oil pump motor which is opened are all connected with a 100 terminal of the air switch QF1, the intermediate relays KA1, the time delay relays KT1-1, the coils of the intermediate relays KM1, the oil pump fault indicator lamp L1 and one end of the oil pump operation indicator lamp L1 are all connected with the air switch QF1 of the intermediate relay KA1, the normally open contact KA1-1 of the intermediate relay KA1 is connected with the other end of the oil pump fault indicator lamp L2, the normally open contact FR1-1 of the thermal relay FR1 is connected with the other end of the coil of the intermediate relay KA1, the normally open contact KA6-2 of the intermediate relay KA6 is connected with the other end of the coil of the time delay relay KT2, the normally open contact KA7-1 of the intermediate relay KA7 is connected with the other end of the coil of the time delay relay KT1, the normally closed contact KM1-2 of the contactor KM1 is connected with the other end of the coil of the time delay relay KT3, the other end of the button switch SB1 is connected with one end of the normally open contact KT3-1 of the time delay KT3 after the connection of the end pins 1 and 2 of the selection switch SA1, the other end pin of the lubrication oil pump motor is connected with one end of the normally open contact KT3-1 of the time delay, the other end of a normally open contact KT3-1 of the time delay relay KT3 is connected with the other end of a normally open contact KM1-1 of the contactor KM1 and then is connected with a normally open contact KT2-1 of the time delay relay KT2, a normally open contact KT1-1 of the time delay relay KT1 and one end of a lubricating oil pump motor which is closed, the other end of the lubricating oil pump motor which is closed is connected with a pin 3 of the selector SA1 and one end of a button switch SB, the other end of the button switch SB is connected with one end of a normally closed contact FR1-2 of the thermal relay FR1, the normally open contact KT2-1 of the time delay relay KT 636, the normally open contact KT1-1 of the thermal relay FR1, the coil of the contactor KM KA 3984, the coil of the intermediate relay, and the other end of the oil pump operation indicator light 3 are connected with a pin 4 of the selector switch SA1, the lubricating oil pump motor is opened, the lubricating oil pump motor is closed, the normally open contact KA1-2 of the intermediate relay KA1, the two ends of the normally open contact KA2-1 of the intermediate relay KA2 and the 5 end pins and the 6 end pins of the selection switch SA1 are respectively connected to the DCS control system.

6. A strong electric control detection system of a turbine generator according to claim 4, characterized in that: the barring motor control unit further comprises a barring motor fault indicator lamp L4, a barring motor operation indicator lamp L5, a selection switch SA2, an intermediate relay KA4, KA5, an emergency stop button JT1, a button switch SB3, SB4, a normally open contact KA5-1 of the intermediate relay KA5, a normally open contact FR2-1 of a heat relay FR2, a button switch SB3, a normally open contact KM2-1 of a contactor KM2, and one end of a coil of the barring motor opening QF8 are connected with a 200 terminal of the air switch QF8, the barring motor fault indicator lamp L8, the barring motor operation indicator lamp L8, a coil of the intermediate relay KA8, one end of the coil of the contactor KM 8 is connected with a 200 terminal of the air switch QF8, the normally open contact 8-1 of the intermediate relay KA8 is connected with the other end of the barring motor fault indicator lamp L4672, and the coil of the heat relay KA8 is connected with the FR 8-8 coil of the other end of the intermediate relay FR 8 The coil of the contactor KM2, the coil of the intermediate relay KA6 and the other end of the turning gear motor operation indicator lamp L5 are connected and then connected with one end of the emergency stop button JT1, the other end of the button switch SB3 is connected with the 1 end pin of the selection switch SA2, the turning gear motor is turned on, the other end of the normally open contact KM2-1 of the contactor KM2 and the 2 end pin of the selection switch SA2 are connected and then connected with the one end of the turning gear motor which is turned off, the other end of the turning gear motor which is turned off is connected with the 3 end pin of the selection switch SA2 and one end of the button switch SB4, the 4 end pin of the selection switch SA2 and the other end of the button switch SB4 are connected and then connected with one end of the normally open contact FR KA2-2 of the intermediate relay FR2, the normally open contact FR KA2-2 of the intermediate relay, the normally open contact 4-2 of the intermediate relay SA 4, and the intermediate relay 2, and the intermediate relay 2-2, The other end of a normally open contact KA4-2 of the intermediate relay KA4 is connected with the other end of the emergency stop button JT1, and the normally open contact KA5-2 of the intermediate relay KA5, two ends of the normally open contact KA6-1 of the intermediate relay KA6 and the 5 end pin and the 6 end pin of the selector switch SA2 are correspondingly connected to the DCS control system.

7. A strong electric control detection system of a turbine generator according to claim 4, characterized in that: the inverter motor control unit further comprises a selection switch SA3, an emergency stop button JT2, a button switch SB5, SB6, an intermediate relay KA3 and KA8, a normally open contact KA7-1 and a button switch SB5 of the intermediate relay KA7 and one end of the inverter motor which is opened are connected with a 300 terminal of the air switch QF9, the other end of the button switch SB5 is connected with a1 terminal pin of the selection switch SA3, one ends of the intermediate relays KA3, KA7 and KA8 coils are connected with a 301 terminal of the air switch QF9, connection terminals are respectively arranged between the 300 terminal of the air switch QF9 and the other ends of the intermediate relays KA3 and KA8 coils, the normally open contact KA7-1 of the intermediate relay KA7, the other end of the inverter motor which is opened, a2 terminal pin of the selection switch SA3 is connected with a3 terminal pin of the selection switch SA3 and one end of the button switch SB6, the other end of 4 end feet of selector switch SA3, button switch SB6 link to each other the back through connecting the contact that inverter motor closed with the one end homogeneous phase of normally open contact KA2-3, intermediate relay KA 4's normally open contact KA4-3 of intermediate relay KA2 is connected, the normally open contact KA2-3 of intermediate relay KA2, the normally open contact KA4-3 of intermediate relay KA4 link to each other the back through emergency stop button JT2 the back with the other end of intermediate relay KA7 coil is connected, 5, 6 end feet of selector switch SA3 connect in DCS control system, the normally open contact KA7-2 both ends of intermediate relay KA7 with inverter motor connects, the normally open contact KA8-1 both ends of intermediate relay KA8 with inverter motor's watchdog contact is connected.

Technical Field

The invention relates to the technical field of power generation, in particular to a strong current control detection system of a turbine generator.

Background

The supercritical carbon dioxide power generation technology is an important direction for replacing the traditional steam power generation technology and realizing the development of energy utilization to higher efficiency and low cost, and a supercritical carbon dioxide power generation system mainly comprises a gas compressor, heat source equipment or a heat exchanger, a turbine generator set, a cooler and other core equipment; the main function of the turbine generator set is to convert the internal energy of the supercritical carbon dioxide working medium in a high-temperature state into the kinetic energy of the rotating machine and further convert the kinetic energy of the rotating machine into electric energy, which is one of core devices of the system, but before the turbine generator set is delivered to a power plant, whether the vibration, bearing temperature rise, overspeed protection performance, parameters and the like of the supercritical carbon dioxide turbine generator set are normal or not needs to be tested, otherwise, a large economic loss is caused, generally, the power plant has a special detection system, but on one hand, the detection system is expensive and inconvenient to debug, on the other hand, the device is tested after being delivered to the power plant, so that the debugging difficulty is increased, the detection efficiency is low, the labor cost is high, and in addition, in the detection process, the turbine generator may need to be frequently started, this can easily damage the turbine generator.

disclosure of Invention

In view of the above problems, the present invention provides a strong current control detection system for a turbine generator, which is convenient to debug, has high detection efficiency, can avoid damage to the turbine generator, and has high safety.

The technical scheme is as follows: it includes three-phase four-wire system power and connect in the control unit on the three-phase four-wire system power, its characterized in that: it still including connect in power supply unit on the three-phase four-wire system power, the control unit divide into respectively with lubricating oil pump motor control unit, barring motor control unit, the inverter motor control unit that power supply unit is connected, lubricating oil pump motor control unit includes the lubricating oil pump motor, barring motor control unit includes the barring motor, inverter motor control unit includes inverter motor, lubricating oil pump motor, barring motor, inverter motor divide equally and do not connect the electricity behind through connection in proper order thermal relay, contactor, current transformer, current transmitter, the air switch respectively in the three-phase four-wire system power, with be connected on lubricating oil pump motor, barring motor, the inverter motor current transmitter corresponds respectively and is connected with DCS control system.

It is further characterized in that:

the thermal relays are divided into thermal relays FR1, FR2 and FR3, the contactors are divided into contactors KM1, KM2 and KM3, the current transformers are divided into current transformers A1, A2 and A3, the current transmitters are divided into current transformers DLB1, current transformers DLB2 and current transformers DLB3, and the air switches are divided into an air switch QF1, an air switch QF2 and an air switch QF 3; the lubricating oil pump motor is electrically connected with phase ends of L1, L2 and L3 of the three-phase four-wire power supply after being sequentially connected with the thermal relay FR1, the contactor KM1, the current transformer A1, the current transmitter DLB1 and the air switch QF1, the turning gear motor is electrically connected with phase ends of L1, L2 and L3 of the three-phase four-wire power supply after being sequentially connected with the thermal relay FR2, the contactor KM2, the current transformer A2, the current transmitter DLB2 and the air switch QF2, and the variable frequency motor is electrically connected with phase ends of L1, L2 and L3 of the three-phase four-wire power supply after being sequentially connected with the thermal relay FR3, the contactor KM3, the current transformer A3, the current transmitter DLB3 and the air switch QF 3;

The alarm device further comprises an alarm unit and a heat dissipation unit which are connected to the three-phase four-wire system power supply in parallel, wherein the alarm unit comprises an air switch QF4, a relay KA3 and a buzzer ALLAE which are sequentially connected, the air switch QF4 is connected with the L3 phase end of the three-phase four-wire system power supply, and the buzzer ALLAE is connected with the N phase end of the three-phase four-wire system power supply; the heat dissipation unit comprises an air switch QF5, the air switch QF5 is connected between L3 and N phase ends of the three-phase four-wire power supply, an illuminating lamp L1 and a fan MI are connected to the air switch QF5 in parallel, and a proximity switch K1 is connected between the air switch QF5 and the illuminating lamp L1;

The power supply unit comprises air switches QF 6-QF 9, a transformer Y1 and fuses FU 1-FU 3, a 380 AC-to-24 DC electric transformer adopted by a transformer Y1, two ends of an incoming line of the air switch QF6 are respectively connected with L3 and N-phase ends of the three-phase four-wire system power supply, two ends of an outgoing line of the air switch QF6 are connected with two ends of an incoming line of the transformer Y1, and the air switches QF 7-QF 9 are respectively connected with an outgoing line end of the transformer Y1 after passing through the fuses FU 1-FU 3; the lubricating oil pump motor control unit is connected with 100 and 101 terminals of the air switch QF7, the barring motor control unit is connected with 200 and 201 terminals of the air switch QF8, and the variable frequency motor control unit is connected with 300 and 301 terminals of the air switch QF 9;

The lubricating oil pump motor control unit further comprises intermediate relays KA1, time delay relays KT 1-KT 1, a selection switch SA1, an oil pump fault indicator lamp L1, an oil pump operation indicator lamp L1, button switches SB1 and SB1, a normally open contact FR1-1 of a heat relay FR1, a normally open contact KA1-1 of the intermediate relay KA1, a normally open contact KA1-2 of the intermediate relay KA1, a normally open contact KA1-1 of the intermediate relay KA1, a button switch SB1, a normally open contact KM1-1 of a contactor KM1, a normally closed contact KM1-2 of the contactor KM1 and one end of a lubricating oil pump motor which is opened are all connected with a 100 terminal of the air switch QF1, the intermediate relays KA1, the time delay relays KT1-1, the coils of the intermediate relays KM1, the oil pump fault indicator lamp L1 and one end of the oil pump operation indicator lamp L1 are all connected with the air switch QF1 of the intermediate relay KA1, the normally open contact KA1-1 of the intermediate relay KA1 is connected with the other end of the oil pump fault indicator lamp L2, the normally open contact FR1-1 of the thermal relay FR1 is connected with the other end of the coil of the intermediate relay KA1, the normally open contact KA6-2 of the intermediate relay KA6 is connected with the other end of the coil of the time delay relay KT2, the normally open contact KA7-1 of the intermediate relay KA7 is connected with the other end of the coil of the time delay relay KT1, the normally closed contact KM1-2 of the contactor KM1 is connected with the other end of the coil of the time delay relay KT3, the other end of the button switch SB1 is connected with one end of the normally open contact KT3-1 of the time delay KT3 after the connection of the end pins 1 and 2 of the selection switch SA1, the other end pin of the lubrication oil pump motor is connected with one end of the normally open contact KT3-1 of the time delay, the other end of a normally open contact KT3-1 of the time delay relay KT3 is connected with the other end of a normally open contact KM1-1 of the contactor KM1 and then is connected with a normally open contact KT2-1 of the time delay relay KT2, a normally open contact KT1-1 of the time delay relay KT1 and one end of a lubricating oil pump motor which is closed, the other end of the lubricating oil pump motor which is closed is connected with a pin 3 of the selector SA1 and one end of a button switch SB, the other end of the button switch SB is connected with one end of a normally closed contact FR1-2 of the thermal relay FR1, the normally open contact KT2-1 of the time delay relay KT 636, the normally open contact KT1-1 of the thermal relay FR1, the coil of the contactor KM KA 3984, the coil of the intermediate relay, and the other end of the oil pump operation indicator light 3 are connected with a pin 4 of the selector switch SA1, the lubricating oil pump motor is started, the lubricating oil pump motor is closed, and the normally open contact KA1-2 of the intermediate relay KA1, two ends of the normally open contact KA2-1 of the intermediate relay KA2 and the 5 and 6 terminal pins of the selector switch SA1 are respectively and correspondingly connected to the DCS control system;

the barring motor control unit further comprises a barring motor fault indicator lamp L4, a barring motor operation indicator lamp L5, a selection switch SA2, an intermediate relay KA4, KA5, an emergency stop button JT1, a button switch SB3, SB4, a normally open contact KA5-1 of the intermediate relay KA5, a normally open contact FR2-1 of a heat relay FR2, a button switch SB3, a normally open contact KM2-1 of a contactor KM2, and one end of a coil of the barring motor opening QF8 are connected with a 200 terminal of the air switch QF8, the barring motor fault indicator lamp L8, the barring motor operation indicator lamp L8, a coil of the intermediate relay KA8, one end of the coil of the contactor KM 8 is connected with a 200 terminal of the air switch QF8, the normally open contact 8-1 of the intermediate relay KA8 is connected with the other end of the barring motor fault indicator lamp L4672, and the coil of the heat relay KA8 is connected with the FR 8-8 coil of the other end of the intermediate relay FR 8 The coil of the contactor KM2, the coil of the intermediate relay KA6 and the other end of the turning gear motor operation indicator lamp L5 are connected and then connected with one end of the emergency stop button JT1, the other end of the button switch SB3 is connected with the 1 end pin of the selection switch SA2, the turning gear motor is turned on, the other end of the normally open contact KM2-1 of the contactor KM2 and the 2 end pin of the selection switch SA2 are connected and then connected with the one end of the turning gear motor which is turned off, the other end of the turning gear motor which is turned off is connected with the 3 end pin of the selection switch SA2 and one end of the button switch SB4, the 4 end pin of the selection switch SA2 and the other end of the button switch SB4 are connected and then connected with one end of the normally open contact FR KA2-2 of the intermediate relay FR2, the normally open contact FR KA2-2 of the intermediate relay, the normally open contact 4-2 of the intermediate relay SA 4, and the intermediate relay 2, and the intermediate relay 2-2, The other end of a normally open contact KA4-2 of the intermediate relay KA4 is connected with the other end of the emergency stop button JT1, and the normally open contact KA5-2 of the intermediate relay KA5, two ends of the normally open contact KA6-1 of the intermediate relay KA6 and the 5 and 6 end pins of the selector switch SA2 are correspondingly connected with the DCS control system;

the inverter motor control unit further comprises a selection switch SA3, an emergency stop button JT2, a button switch SB5, SB6, an intermediate relay KA3 and KA8, a normally open contact KA7-1 and a button switch SB5 of the intermediate relay KA7 and one end of the inverter motor which is opened are connected with a 300 terminal of the air switch QF9, the other end of the button switch SB5 is connected with a1 terminal pin of the selection switch SA3, one ends of the intermediate relays KA3, KA7 and KA8 coils are connected with a 301 terminal of the air switch QF9, connection terminals are respectively arranged between the 300 terminal of the air switch QF9 and the other ends of the intermediate relays KA3 and KA8 coils, the normally open contact KA7-1 of the intermediate relay KA7, the other end of the inverter motor which is opened, a2 terminal pin of the selection switch SA3 is connected with a3 terminal pin of the selection switch SA3 and one end of the button switch SB6, the other end of 4 end feet of selector switch SA3, button switch SB6 link to each other the back through connecting the contact that inverter motor closed with the one end homogeneous phase of normally open contact KA2-3, intermediate relay KA 4's normally open contact KA4-3 of intermediate relay KA2 is connected, the normally open contact KA2-3 of intermediate relay KA2, the normally open contact KA4-3 of intermediate relay KA4 link to each other the back through emergency stop button JT2 the back with the other end of intermediate relay KA7 coil is connected, 5, 6 end feet of selector switch SA3 connect in DCS control system, the normally open contact KA7-2 both ends of intermediate relay KA7 with inverter motor connects, the normally open contact KA8-1 both ends of intermediate relay KA8 with inverter motor's watchdog contact is connected.

The invention has the advantages that the lubricating oil pump motor control unit, the turning gear motor control unit and the variable frequency motor control unit which are connected with the power supply unit are arranged, the lubricating oil pump motor, the turning gear motor and the variable frequency motor are respectively and electrically connected with the three-phase four-wire system power supply after being sequentially connected with a thermal relay, a contactor, a current transformer, a current transmitter and an air switch, the current transmitters connected with the lubricating oil pump motor, the turning gear motor and the variable frequency motor are respectively and correspondingly connected with the DCS control system, in the detection test process of the turbine generator, when the DCS control system detects that the current of the lubricating oil pump motor is obviously larger than the rated current of the turbine generator in the non-starting stage, the turning gear motor or the variable frequency motor can be controlled to be turned off firstly, then the lubricating oil pump motor is turned off, and once the lubricating oil pump motor is, the turbine generator can be restarted after a set time, so that frequent starting of a lubricating oil pump motor is avoided, preferential protection of the turbine generator is realized, and safety and detection efficiency are improved.

Drawings

FIG. 1 is a circuit schematic of the present invention;

Fig. 2 is a schematic circuit diagram of a motor control unit of the lubricating oil pump;

FIG. 3 is a circuit schematic of the barring motor control unit;

Fig. 4 is a circuit schematic of the inverter motor control unit.

Detailed Description

as shown in fig. 1, the present invention includes a three-phase four-wire system power supply, a control unit connected to the three-phase four-wire system power supply, and a power supply unit connected to the three-phase four-wire system power supply, where the control unit is divided into a lubricating oil pump motor control unit, a turning gear motor control unit, and a variable frequency motor control unit, where the lubricating oil pump motor control unit includes a lubricating oil pump motor T1, the turning gear motor control unit includes a turning gear motor T2, the variable frequency motor control unit includes a variable frequency motor T3, the lubricating oil pump motor T1, the turning gear motor T2, and the variable frequency motor T3 are respectively connected to the three-phase four-wire system power supply through a thermal relay, a contactor, a current transformer, and an air switch which plays roles of overload and short-circuit protection; the generated current signal of 4-20ma can be transmitted to the DCS control system through the current transducer; the start-stop control of each motor is realized through a contactor; the thermal relay plays a role in overload protection; the current transmitters connected with the lubricating oil pump motor T1, the turning gear motor T2 and the variable frequency motor T3 are respectively and correspondingly connected with a DCS control system (the DCS control system is an existing control system, and is not shown in the figure).

The thermal relays are divided into thermal relays FR1, FR2 and FR3, the contactors are divided into contactors KM1, KM2 and KM3, the current transformers are divided into current transformers A1, A2 and A3, the current transmitters are divided into current transmitters DLB1, current transmitters DLB2 and current transmitters DLB3, and the air switches are divided into an air switch QF1, an air switch QF2 and an air switch QF 3; a lubricating oil pump motor T1 is electrically connected with phase ends L1, L2 and L3 of a three-phase four-wire power supply after being sequentially connected with a thermal relay FR1, a contactor KM1, a current transformer A1, a current transmitter DLB1 and an air switch QF1, a turning gear motor T2 is electrically connected with phase ends L1, L2 and L3 of the three-phase four-wire power supply after being sequentially connected with a thermal relay FR2, a contactor KM2, a current transformer A2, a current transmitter DLB2 and an air switch QF2, and a variable frequency motor T3 is electrically connected with phase ends L1, L2 and L3 of the three-phase four-wire power supply after being sequentially connected with a thermal relay FR3, a contactor KM3, a current transformer A3, a current transmitter DLB3 and an air switch QF 3.

The intelligent alarm device also comprises an alarm unit and a heat dissipation unit which are connected in parallel with the three-phase four-wire system power supply, wherein the alarm unit comprises an air switch QF4, a relay KA3 and a buzzer ALLAE which are sequentially connected, the air switch QF4 is connected with the L3 phase end of the three-phase four-wire system power supply, and the buzzer ALLAE is connected with the N phase end of the three-phase four-wire system power supply; the heat dissipation unit comprises an air switch QF5, the air switch QF5 is connected between the L3 phase end and the N phase end of the three-phase four-wire system power supply, an illuminating lamp L1 and a fan MI are connected to the air switch QF5 in parallel, and a proximity switch K1 is connected between the air switch QF5 and the illuminating lamp L1.

The power supply unit comprises air switches QF 6-QF 9, a transformer Y1 and fuses FU 1-FU 3, a 380 AC-to-24 DC electric transformer adopted by the transformer Y1, two incoming line ends of the air switch QF6 are respectively connected with an L3 phase end and an N phase end of a three-phase four-wire system power supply, two outgoing line ends of the air switch QF6 are connected with two incoming line ends of a transformer Y1, and the air switches QF 7-QF 9 are respectively connected with an outgoing line end of the transformer Y1 after passing through the fuses FU 1-FU 3; the lubricating oil pump motor control unit is connected with 100 and 101 terminals of the air switch QF7, the barring motor control unit is connected with 200 and 201 terminals of the air switch QF8, and the variable frequency motor control unit is connected with 300 and 301 terminals of the air switch QF 9.

As shown in fig. 2, the lubricating oil pump motor control unit further includes intermediate relays KA1, KA2, KA6, KA7, delay relays KT1 to KT3, a selection switch SA1, an oil pump fault indicator lamp L2, an oil pump operation indicator lamp L3, a push-button switch SB1, and an SB 2; 18.5KW selected by a lubricating oil pump motor T1 is directly started under full load, the starting current is very large, the lubricating oil pump motor T1 cannot be powered off in the normal test process, the rated current of an air switch QF1 is two levels higher than the rated current of a lubricating oil pump motor T1, a current transmitter DLB1 is connected to a DCS control system, and the DCS control system turns off a turning motor T2 or a variable frequency motor T3 and then turns off the lubricating oil pump motor T1 by control after detecting that the lubricating oil pump motor T1 is obviously higher than the rated current of a turbine generator in the non-starting stage; delay relays KT1, KT2 are time delay outage relays, and delay relay KT3 is the relay that obtains the electricity of time delay, in case lubricating oil pump motor T1 shuts down, can not immediately start, can move once more after the time that delay relay KT3 set for to avoid lubricating oil pump motor T1 frequent start and damage.

Wherein, a normally open contact FR1-1 of a thermal relay FR1, a normally open contact KA1-1 of an intermediate relay KA1, a normally open contact KA6-2 of an intermediate relay KA6, a normally open contact KA7-1 of an intermediate relay KA7, a button switch SB1, a normally open contact KM1-1 of a contactor KM1, a normally closed contact KM1-2 of a contactor KM1 and one opened end of a lubricating oil pump motor T1 are all connected with a 100 terminal of an air switch QF1, an intermediate relay KA1, time delay relays KT 1-KT 1, an intermediate relay KA1, a coil of the contactor KM1, one end of an oil pump fault indicator lamp L1 and an operation indicator lamp L1 are all connected with a 101 terminal of the air switch QF1, a normally open contact KA1-1 of the intermediate relay KA1 is connected with the other end of the oil pump fault indicator lamp L1, a normally open contact FR1-1 of the thermal relay FR1 is connected with a relay KA1 of the, the normally open contact KA6-2 of the intermediate relay KA6 is connected with the other end of the coil of the time delay relay KT2, the normally open contact KA7-1 of the intermediate relay KA7 is connected with the other end of the coil of the time delay relay KT1, the normally closed contact KM1-2 of the contactor KM1 is connected with the other end of the coil of the time delay relay KT3, the other end of the button switch SB1 is connected with the 1 and 2 end pins of the selector switch SA1 and then connected with one end of the normally open contact KT3-1 of the time delay relay KT3, the opened other end of the lubricating oil pump motor T1 is connected with one end of the normally open contact KT3-1 of the time delay relay KT3, the other end of the normally open contact KT3-1 of the time delay relay KT3 is connected with the other end of the normally open contact KM 9-1 of the contactor KM1 and then connected with the normally open contact KT, The closed ends of a lubricating oil pump motor T1 are connected, the closed other end of a lubricating oil pump motor T1 is connected with the 3-end pin of a selector switch SA1 and one end of a button switch SB, the other end of the button switch SB is connected with one end of a normally closed contact FR1-2 of a thermal relay FR1, a normally open contact KT2-1 of a time delay relay KT2, a normally open contact KT1-1 of a time delay relay KT1, a normally closed contact FR1-2 of a thermal relay FR1, a coil of a contactor KM1, a coil of an intermediate relay KA2 and the other end of an oil pump operation indicator lamp L3 are connected with the 4-end pin of the selector switch SA1, the lubricating oil pump motor T1 is started, the lubricating oil pump motor T1 is closed, the normally open contact KA1-2 of the intermediate relay KA1, two ends of the normally open contact KA2-1 of the intermediate relay KA2 and 5 and 6 end pins of the selector switch SA1 are respectively connected to the DCS control system; the lubricating oil pump motor T1 control mode feedback system comprises an intermediate relay KA2, a lubricating oil pump motor T3526, a lubricating oil pump motor T3538, a selection switch SA1, a terminal pin 5 and a terminal pin 6, wherein the feedback of the running state of the lubricating oil pump motor T1 of the DCS control system is achieved through a normally open contact KA2-1 of the intermediate relay KA2, the feedback of the fault state of the lubricating oil pump motor T1 of the DCS control system is achieved through the normally open contact KA1-2 of the intermediate relay KA1, and the feedback of the control mode of the lubricating oil.

In a lubricating oil pump motor control unit, on-site control and DCS control can be realized on the starting and stopping of a lubricating oil pump motor T1 through the conversion of a selection switch SA1, once the lubricating oil pump motor T1 is stopped, the lubricating oil pump motor T1 can be restarted only after a set time through a normally closed contact KM1-2 of a contactor KM1 and a normally open contact KT3-1 of a time delay relay KT3, and frequent starting of the lubricating oil pump motor T1 is avoided; when the selection switch SA1 is switched in a local control mode, as the turning gear motor T2 and the variable frequency motor T3 are not started at this time, once overload occurs, the lubricating oil pump motor T1 can be directly closed through the normally closed contact FR1-2 of the thermal relay FR1, the lubricating oil pump motor T1 is started, the selection switch SA1 is switched to a remote control mode, a test flow stage is entered, if the stage is overloaded, the normally open contact KA1-1 of the intermediate relay KA1 is closed through the normally open contact FR1-1 of the thermal relay FR1, then the signal is fed back to the DCS control system through the normally open contact KA1-2 of the intermediate relay KA1, the DCS control panel controls the turning gear motor T2 and the variable frequency motor T3 to power off immediately, the lubricating oil pump motor T1 is closed after a period of time, and the turbine generator is protected preferentially; the turning motor T2 and the variable frequency motor T3 cannot be closed under the starting condition through the normally open contacts KA6-2 and KA7-1 of the intermediate relay KA6, the time delay relay KT1 and the normally open contact KT1-1 thereof, and the time delay relay KT2 and the normally open contact KT2-1 thereof, after the turning motor T2 and the variable frequency motor T3 are closed, the turning motor T2 and the variable frequency motor T3 are closed within the set time of the time delay relay, such as within three minutes, after the variable frequency motor T3 is closed in the normal experimental process, after the turning motor T1 is automatically closed within 10 minutes, the in-situ mode can be switched, and after 3 minutes, the lubricating oil pump motor T1 is closed.

Specifically, an intermediate relay KA1 is controlled through a normally open contact FR1-1 of a thermal relay FR1, once the thermal relay FR1 is overloaded, the normally open contact FR1-1 of the thermal relay FR1 is sucked, the intermediate relay KA1 acts, the normally open contact KA1-1 of the thermal relay FR1 controls an oil pump fault indicator lamp L2, and fault information of overload of a lubricating oil pump motor T1 is fed back to a DCS control system through the normally open contact KA 1-2; when the selection switch SA1 is in the position 1, the lubricating oil pump motor T1 can be controlled to be started and stopped remotely, and when the selection switch SA1 is in the position 2, the lubricating oil pump motor T1 can be controlled to be started and stopped remotely; and once the turning motor T2 and the variable frequency motor T3 are started, the normally open contact KT1-1 of the delay relay KT1 and the normally open contact KT2-1 of the delay relay KT2 are immediately sucked, so only the turning motor T2 and the variable frequency motor T3 are started, the lubricating oil pump motor T1 cannot be closed in any way, only the turning motor T2 and the variable frequency motor T3 are stopped, and after the time is set by the delay relay KT1 and the delay relay KT2, the lubricating oil pump motor T1 can be closed, so that the misoperation of the turbo machine under the running condition can be avoided, and the dry friction condition of the turbo machine caused by the closing of the lubricating oil pump motor T1 can be avoided.

as shown in fig. 3, the barring motor control unit further includes a barring motor T fault indicator lamp L, a barring motor T operation indicator lamp L, a selector switch SA, an intermediate relay KA, an emergency stop button JT, button switches SB, a normally open contact KA-1 of the intermediate relay KA, a normally open contact FR-1 of the thermal relay FR, a button switch SB, a normally open contact KM-1 of the contactor KM, and an open end of the barring motor T are all connected to a 200 terminal of the air switch QF, one terminals of the barring motor T fault indicator lamp L, the barring motor T operation indicator lamp L, coils of the intermediate relays KA, and a coil of the contactor KM are all connected to a 201 terminal of the air switch QF, a normally open contact KA-1 of the intermediate relay KA is connected to the other end of the barring motor T fault indicator lamp L, a normally open contact FR-1 of the thermal relay FR is connected to the other end of the coil of the intermediate relay KA, a coil of a contactor KM2, a coil of an intermediate relay KA6 and the other end of a turning motor T2 operation indicator lamp L5 are connected and then connected with one end of an emergency stop button JT1, the other end of a button switch SB3 is connected with a1 end pin of a selection switch SA2, the turning motor T2 is opened, the other end of a normally open contact KM2-1 of a contactor KM2 and a2 end pin of a selection switch SA2 are connected and then connected with one end of a turning motor T2 which is closed, the other end of the turning motor T2 which is closed is connected with a3 end pin of a selection switch SA2 and one end of a button switch SB4, a4 end pin of the selection switch SA2 and the other end of the button switch SB2 are connected and then are connected with one end of a normally open contact FR2-2 of the intermediate relay KA2 through a normally closed contact FR2-2 of the thermal relay FR2 and a normally open contact FR KA2-2 of the intermediate relay KA2, one end of the normally open contact KA 2-72 of the intermediate relay KA2 is connected with the other end of the emergency stop button JT 72, the normally open contact KA5-2 of the intermediate relay KA5, two ends of the normally open contact KA6-1 of the intermediate relay KA6 and the 5 and 6 end pins of the selector switch SA2 are respectively connected to the DCS control system; the system comprises an intermediate relay KA6, a normally open contact KA6-1 of the intermediate relay KA6, a turning gear motor T2 of the DCS control system, a normally open contact KA5-2 of the intermediate relay KA5, a turning gear motor T2 of the DCS control system, and a selector switch SA2, 5 and 6 end pins are converted to achieve feedback of a turning gear motor T2 control mode of the DCS control system.

In the barring motor control unit, an intermediate relay KA5 is controlled through a normally open contact FR2-1 of a thermal relay FR2, once the thermal relay FR2 is overloaded, the normally open contact FR2-1 of the thermal relay FR2 is attracted, the intermediate relay KA5 acts, the normally open contact KA5-1 of the intermediate relay KA5 is used for controlling a barring motor T2 fault indicator lamp L4, and fault information of overloading of the barring motor T2 is fed back to a DCS control system through the normally open contact KA5-2 of the intermediate relay KA 5; when the selection switch SA2 is in the position 1, the starting and stopping of the disc vehicle motor T2 can be controlled remotely, when the selection switch SA2 is in the position 2, the local control and the starting and stopping of the disc vehicle motor T2 can be realized remotely, and the function that the disc vehicle motor T2 cannot be started under the condition that the lubricating oil pump motor T1 is not started can be realized through the normally open contact KA2-2 of the intermediate relay KA2 and the normally open contact KA4-2 of the intermediate relay KA 4.

As shown in fig. 4, the inverter motor control unit further includes a selector switch SA3, an emergency stop button JT2, button switches SB5, SB6, intermediate relays KA3, KA8, open ends of a normally open contact KA7-1 of the intermediate relay KA7, a button switch SB5 and an inverter motor T3 are connected to a 300 terminal of the air switch QF9, the other end of the button switch SB5 is connected to a1 terminal of the selector switch SA3, one ends of coils of the intermediate relays KA3, KA7, KA8 are connected to a 301 terminal of the air switch QF8, a connecting terminal Z8 is provided between the 300 terminal of the air switch QF8 and the other ends of coils of the intermediate relays KA8, the normally open contact KA8-1 of the intermediate relay KA8, the open end of the inverter motor T8, a2 terminal of the selector switch SA 8 is connected to a3 terminal of the selector switch SA 8 and one end of the button switch SB 8, and the terminal of the selector switch SA 8 is connected to the terminal of the selector switch SA 8, The other end of the button switch SB6 is connected with one end of a normally open contact KA2-3 of an intermediate relay KA2 and one end of a normally open contact KA4-3 of an intermediate relay KA4 through a contact which is closed by a frequency conversion motor T3, the normally open contact KA2-3 of the intermediate relay KA2 and the normally open contact KA4-3 of the intermediate relay KA4 are connected with the other end of a coil of the intermediate relay KA7 through an emergency stop button JT2, the end pins 5 and 6 of the selector switch SA3 are connected with a DCS control system, the two ends of the normally open contact KA7-2 of the intermediate relay KA7 are connected with the frequency conversion motor T3, and the two ends of the normally open contact KA8-1 of the intermediate relay KA8 are connected with a watchdog contact of the frequency conversion motor T3; the function that the down-conversion motor T3 cannot be started under the condition that the lubricating oil pump motor T1 is not started can be realized through the normally open contact KA2-3 of the intermediate relay KA2 and the normally open contact KA4-3 of the intermediate relay KA 4; when the selection switch SA3 is switched to the 5 and 6 terminal pins, the feedback of the start-stop control mode of the variable frequency motor T3 of the DCS control system is realized.

according to the detection test, the strong electric part to be controlled is 18.5kw lubricating oil pump motor T1, 22kw turning motor T2 and 600kw variable frequency motor T3, and 1, before the lubricating oil pump motor T1 is not started, the turning motor T2 and the variable frequency motor T3 cannot be started; 2. under the starting state of the turning motor T2 and the variable frequency motor T3, the lubricating oil pump motor T1 cannot stop, and the lubricating oil pump motor T1 can stop after the turning motor T2 and the variable frequency motor T3 stop for 1 minute; 3. once the lubricating oil pump motor T1 stops, the lubricating oil pump motor T1 is prevented from being damaged due to frequent starting, and the turbine generator is prevented from being damaged due to the fact that the lubricating oil pump motor T1 can be restarted after a set time is needed.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.