High-power special power supply fault interlocking protection device based on PLC
阅读说明:本技术 一种基于plc的大功率特种电源故障连锁保护装置 (High-power special power supply fault interlocking protection device based on PLC ) 是由 蔺满强 吴保宁 康主会 陈改霞 姚玉玺 孙晓桓 李星燕 柴正勇 卢军祥 万国华 于 2019-10-25 设计创作,主要内容包括:本发明属于电气技术和电力电子技术领域,公开了一种基于PLC的大功率特种电源故障连锁保护装置,以解决现有技术电源的故障连锁保护问题,该装置包括主控制器以及PLC,PLC的故障输入点连接有故障接收电路,故障复位电路与PLC的复位输出点连接,故障接收电路的另一端与外部故障传输光纤连接,故障接收电路的电源接口连接有电压转换电路,电压转换电路连接有电源指示电路,电源指示电路与24V电源连接,PLC的故障输出点连接有故障发送电路,故障接收电路与故障发送电路之间连接有故障保持电路。本发明采用光纤以光的形式在单体电源之间传输故障信息,隔离了电源之间的电磁干扰,进一步提高了电源系统工作的可靠性。(The invention belongs to the technical field of electrical technology and power electronics, and discloses a high-power special power supply fault interlocking protection device based on a PLC (programmable logic controller), which aims to solve the problem of fault interlocking protection of a power supply in the prior art. The invention adopts the optical fiber to transmit the fault information between the single power supplies in the form of light, isolates the electromagnetic interference between the power supplies and further improves the working reliability of the power supply system.)
1. The utility model provides a high-power special power supply fault chain protection device based on PLC, characterized by: including main control unit (1) and from controller (7) be connected with main control unit (1), be connected with PLC (2), characterized by from controller (7): a fault input point of the PLC (2) is connected with a fault receiving circuit (3), a reset output point of the PLC (2) is connected with a fault reset circuit (6), the other end of the fault receiving circuit (3) is connected with an external fault transmission optical fiber, a power interface of the fault receiving circuit (3) is connected with a voltage conversion circuit, the voltage conversion circuit is connected with a power indication circuit, and the power indication circuit is connected with a 24V power supply; the fault output point of the PLC (2) is connected with a fault sending circuit (4), the fault sending circuit (4) is connected with an external fault transmission optical fiber, the external fault transmission optical fiber is connected with a next fault receiving circuit (3), and a fault maintaining circuit (5) is connected between the fault receiving circuit (3) and the fault sending circuit (4).
2. The PLC-based high-power special power supply fault interlock protection device is characterized in that: the power supply indicating circuit comprises an eighth resistor (R8) and a light emitting diode (V2) which are connected in series, the eighth resistor (R8) and the first light emitting diode (V2) are connected in series and then respectively connected with a first filter capacitor (C01) and a second filter capacitor (C03) in parallel on the 24V power supply, the eighth resistor (R8) is connected with the positive pole of the 24V power supply, and the first light emitting diode (V2) is connected with the negative pole of the 24V power supply.
3. The PLC-based high-power special power supply fault interlock protection device is characterized in that: the voltage conversion circuit comprises a first resistor (R1) connected with the anode of a 24V power supply, a second resistor (R2) is connected with the first resistor (R1), the cathode of a voltage stabilizing diode (V1) is connected with the second resistor (R2), the anode of the voltage stabilizing diode (V1) is connected with the cathode of the 24V power supply, and a 5V power output end is connected between the second resistor (R2) and the voltage stabilizing diode (V1).
4. The PLC-based high-power special power supply fault interlock protection device according to claim 2 or 3, wherein: the fault receiving circuit (3) comprises a receiving optical fiber head (U1), a VCC terminal of the receiving optical fiber head (U1) is connected with a fifth resistor (R5), the end of the fifth resistor (R5) is also connected with the positive electrode of a 5V power supply, and the other end of the fifth resistor (R5) is connected with an OUT terminal of the receiving optical fiber head (U1); still parallelly connected between VCC terminal and the GND terminal of receiving fiber head (U1) has first electric capacity (C1), still parallelly connected be equipped with first diode (V6), second electric capacity (C2) between OUT terminal and the ground wire of receiving fiber head (U1), and the positive pole ground connection of first diode (V6), the OUT terminal of receiving fiber head (U1) still is connected with the base of a triode (V3), the collector ground connection of a triode (V3), the emitter of a triode (V3) is connected with No. 2 end of opto-coupler (V4), the anodal of 5V power is received after 1 end and the sixth resistance (R6) of opto-coupler (V4) are established ties, the anodal of No. 4 termination 24V power of opto-coupler (V4), the output point of No. 3 end of opto-coupler (V4) is fault signal, connect the fault input point of PLC (2).
5. The PLC-based high-power special power supply fault interlock protection device according to claim 4, wherein: the fault sending circuit (4) comprises a sending optical fiber head (U2), terminals 2,6 and 7 of the sending optical fiber head (U2) are connected with a fourth resistor (R4), the fourth resistor (R4) is connected with a third resistor (R3), the third resistor (R3) is connected with a fault output point of the PLC (2), a terminal 3 of the sending optical fiber head (U2) is connected with an anode of a second light-emitting diode (V7), and a cathode of the second light-emitting diode (V7) is grounded.
6. The PLC-based high-power special power supply fault interlock protection device according to claim 5, wherein: the fault holding circuit (5) comprises a seventh resistor (R7) connected with an OUT terminal of a receiving optical fiber head (U1), the other end of the seventh resistor (R7) is connected with a base electrode of a second triode (V5), an emitting electrode of the second triode (V5) is grounded, and a collecting electrode of the second triode (V5) is connected with the fault resetting circuit (6).
7. The PLC-based high-power special power supply fault interlock protection device according to claim 5, wherein: fault reset circuit (6) are relay (K1), No. 4 ends and No. two triode (V5)'s of relay (K1) collecting electrode are connected, No. 6 ends of relay (K1) still connect between third resistance (R3) and fourth resistance (R4) through the XSI terminal, No. 1 end and the reset output point of PLC (2) of relay (K1) are connected, No. 16 terminal ground connection of relay (K1), the positive pole of 24V power is connected to the normally open contact 13 of relay (K1), the normally open contact 9 and the third resistance (R3) of relay (K1) are connected.
8. The PLC-based high-power special power supply fault interlock protection device is characterized in that: and the PLC (2) is in communication connection with the main controller (1) through the slave controller (7).
Technical Field
The invention relates to the technical field of electrical technology and power electronics, in particular to a high-power special power supply fault interlocking protection device based on a PLC.
Background
With the continuous development of scientific research and medical particle accelerator technology, the requirements on accelerator power supplies are higher and higher, the power supplies have the characteristics of high precision, large capacity, small ripple, high reliability and diversified output current waveforms, and the power supplies usually work cooperatively in a series, parallel or series-parallel combination mode. In the conventional power supply system, the fault chain between the power supplies is only transmitted in a communication mode, and signals are transmitted through wire connection, so that electromagnetic interference is often caused to be transmitted between the power supplies, and great troubles are brought to the precision and measurement of the power supplies. In a large-voltage and large-current power supply system, along with the increase of the number of power supplies, the requirement on the working reliability of the whole power supply is higher and higher, and the requirement on the response speed of each power supply to faults is higher and higher. The power supply faults are interlocked through a complex CAN bus communication mode, the working requirement of the whole accelerator power supply system cannot be met, and the technical problem cannot be solved in the prior art.
Disclosure of Invention
The invention aims to solve the problem of fault interlocking protection of a special power supply of a high-power particle accelerator in the prior art, and provides a PLC-based high-power special power supply fault interlocking protection device for transmitting faults between power supplies in an optical mode.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-power special power supply fault interlocking protection device based on a PLC (programmable logic controller) comprises a master controller and a slave controller connected with the master controller, wherein the slave controller is connected with the PLC, a fault input point of the PLC is connected with a fault receiving circuit, a reset output point of the PLC is connected with a fault reset circuit, the other end of the fault receiving circuit is connected with an external fault transmission optical fiber, a power interface of the fault receiving circuit is connected with a voltage conversion circuit, the voltage conversion circuit is connected with a power supply indicating circuit, and the power supply indicating circuit is connected with a 24V power supply; the fault output point of the PLC is connected with a fault sending circuit, the fault sending circuit is connected with an external fault transmission optical fiber, the external fault transmission optical fiber is connected with a next fault receiving circuit, and a fault holding circuit is connected between the fault receiving circuit and the fault sending circuit.
Furthermore, the power supply indicating circuit comprises an eighth resistor and a light emitting diode which are connected in series, the eighth resistor and the first light emitting diode are connected in series and then respectively connected with the first filter capacitor and the second filter capacitor in parallel on the 24V power supply, the eighth resistor is connected with the anode of the 24V power supply, and the first light emitting diode is connected with the cathode of the 24V power supply.
Further, the voltage conversion circuit comprises a first resistor connected with the anode of the 24V power supply, the first resistor is connected with a second resistor, the second resistor is connected with the cathode of a voltage stabilizing diode, the anode of the voltage stabilizing diode is connected with the cathode of the 24V power supply, and a 5V power supply output end is connected between the second resistor and the voltage stabilizing diode.
Furthermore, the fault receiving circuit comprises a receiving optical fiber head, a VCC terminal of the receiving optical fiber head is connected with a fifth resistor, the end of the fifth resistor is also connected with the positive electrode of the 5V power supply, and the other end of the fifth resistor is connected with an OUT terminal of the receiving optical fiber head; receive between the VCC terminal of optical fiber head and the GND terminal still parallelly connected have first electric capacity, still parallelly connected be equipped with first diode between the OUT terminal of receiving optical fiber head and the ground wire, the second electric capacity, and the anode ground of first diode, the OUT terminal of receiving optical fiber head still is connected with the base of a triode, the collecting electrode ground connection of a triode, the projecting pole of a triode is connected with No. 2 ends of opto-coupler, receive the positive pole of 5V power after No. 1 end and the sixth resistance series connection of opto-coupler, the positive pole of No. 4
Furthermore, the fault sending circuit comprises a sending optical fiber head,
Furthermore, the fault holding circuit comprises a seventh resistor connected with the OUT terminal of the receiving optical fiber head, the other end of the seventh resistor is connected with the base electrode of the second triode, the emitting electrode of the second triode is grounded, and the collecting electrode of the second triode is connected with the fault resetting circuit.
Further, the fault reset circuit is a relay, the No. 4 end of the relay is connected with the collector electrode of the second triode, the No. 6 end of the relay is further connected between the third resistor and the fourth resistor through an XSI terminal, the No. 1 end of the relay is connected with the reset output point of the PLC, the No. 16 terminal of the relay is grounded, the normally
Further, the PLC is in communication connection with the master controller through the slave controller.
Compared with the prior art, the invention has the following beneficial effects:
in a special power supply of a high-power accelerator, a power supply usually has a plurality of single power supplies working cooperatively in a series connection, parallel connection or series-parallel connection combination mode, and a control mode usually adopts master control and slave control, namely, one master controller controls a plurality of slave controllers through communication, the slave controllers control a PLC through communication, and the PLC controls other equipment. When equipment of a certain single power supply breaks down, the PLC of the single power supply uploads fault information to a corresponding slave controller through communication, the slave controller uploads the fault information to the master controller through communication, the master controller processes the fault information and then issues the fault information to slave controllers of other single power supplies, the slave controllers issue the fault information to corresponding PLC again for processing, when the fault information is transmitted through communication, the fault information is processed by a plurality of controllers and the PLC, information transmission delay is generated, the fault information is likely to be lost, and the equipment in a power supply system of the high-power accelerator cannot be protected in time.
The fault interlocking protection device directly links the fault information of the single power supply in series through the PLC of the single power supply to form another fault transmission channel to form double protection with communication transmission, thereby greatly improving the reliability of the high-power special power supply, accelerating the response speed of the power supply to the fault, effectively protecting the power supply in time and further reducing the occurrence rate of accidents.
The fault interlocking protection device adopts optical fibers to transmit fault information between the single power supplies in an optical mode, isolates electromagnetic interference between the power supplies, and further improves the working reliability of a power supply system.
The fault interlocking protection device has the functions of fault information keeping and resetting, when one power supply fault information in the cooperative single power supplies is not released, other single power supplies cannot be switched on due to the action of fault interlocking, and the main controller is used for uniformly issuing the reset information to ensure that all power supplies can be normally switched on after being reset after the fault is eliminated, so that the safety of personnel and equipment is ensured to a certain extent.
The fault interlocking protection device adopts a modular design, has a standard external interface, and can be randomly configured and installed according to the number of the single power supplies to carry out fault interlocking, so that the installation, debugging and maintenance are more convenient and faster.
Drawings
Fig. 1 is a schematic diagram of a power conversion circuit of the present invention.
Fig. 2 is a schematic diagram of the fault-chain protection device of the present invention.
Fig. 3 is a system block diagram of the application of the invention.
The reference numerals have the following meanings: 1. a main controller; 2, PLC; 3. a fault receiving circuit; 4. a fault transmitting circuit; 5. a fault holding circuit; 6. a fault reset circuit; 7. and a slave controller.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1-3, the high-power special power supply failure interlock protection device based on the PLC includes a
As shown in fig. 1, the power indication circuit includes an eighth resistor R8 and a light emitting diode V2 connected in series, and the eighth resistor R8 is connected in series with the first light emitting diode V2 and then connected in parallel with the first filter capacitor C01 and the second filter capacitor C03 respectively on the 24V power supply, and the eighth resistor R8 is connected to the positive pole of the 24V power supply, and the first light emitting diode V2 is connected to the negative pole of the 24V power supply.
The voltage conversion circuit comprises a first resistor R1 connected with the anode of the 24V power supply, a second resistor R2 is connected with the first resistor R1, the cathode of a voltage stabilizing diode V1 is connected with the second resistor R2, the anode of a voltage stabilizing diode V1 is connected with the cathode of the 24V power supply, and a 5V power supply output end is connected between the second resistor R2 and the voltage stabilizing diode V1.
The fault interlocking protection device adopts a 24V power supply for power supply, and when the fault interlocking protection device works, the 24V power supply is filtered by a first filter capacitor C01 and a second filter capacitor C03, then is subjected to current limiting by a first resistor R1 and a second resistor R2, and is converted into 5V voltage required by a circuit by a voltage stabilizing diode V1; the power supply indicating circuit consisting of the eighth resistor R8 and the first light emitting diode V2 can display whether the voltage of the power supply is normal or not in real time.
As shown in fig. 2, the fault receiving
The
The
The
Port description of PLC 2: the fault output point Q0.1 outputs a low level as fault and outputs a high level as no fault; the reset output point Q0.2 outputs low level without resetting and outputs high level reset; the fault receiving point I0.1 receives a fault of the low level, and the receiving of the high level is no fault.
The system is initialized, when working, the whole system is initialized by using a reset signal, namely, the
When the single power supply equipment has a fault, the local PLC2 processes the received fault information and outputs low level 0V at a fault output point Q0.1, at the moment, the sending optical fiber head U2 does not emit light because of no driving current, and the fault information is transmitted to a receiving circuit of a fault interlocking device of other single power supplies through an external fault transmission optical fiber.
When the single power supply receives the fault information of other single power supplies, the No. 6 end of the receiving optical fiber head U1 outputs high level because the optical signal can not be received, so that the first triode V3 is turned off, and the second triode V5 is turned on; after the first triode V3 is turned off, the optocoupler V4 is also turned off, so that 24V cannot be sent to a fault receiving point I0.1 of the PLC2, the fault receiving point I0.1 receives a low level, fault information is transmitted to the local PLC2, meanwhile, after the second triode V5 is turned on, the potential between the third resistor R3 and the fourth resistor R4 is forcibly pulled to 0V through the normally closed
According to the fault maintaining principle, when a fault occurs, because the receiving optical fiber head U1 cannot receive an optical signal, the
FIG. 3 is a schematic diagram of a system applied to a fault interlock protection device in a high-power special power system according to the present invention, when a fault occurs in a device of a No. 1 single power source, a PLC2 of the No. 1 power source processes the fault information and sends the fault information to a
- 上一篇:一种医用注射器针头装配设备
- 下一篇:过电流保护电路以及其方法