阅读说明：本技术 环网柜地刀挂锁智能控制装置、系统和地刀挂锁装置 (Intelligent control device and system for ring main unit ground knife padlock and ground knife padlock device ) 是由 戴书军 曹骏 于 2020-07-03 设计创作，主要内容包括：本发明实施例公开了一种环网柜地刀挂锁智能控制装置、系统和地刀挂锁装置,该控制装置包括电位差感应模块、滤波模块、电压比较模块和控制模块；电位差感应模块用于感应环网柜的电压并从其输出端输出,电压比较模块用于将滤波模块输出的电压与预设电压进行比较并生成触发信号；控制模块用于根据触发信号生成第一控制信号以控制地刀挂锁的状态。本发明实施例提供的技术方案采用电位差感应模块来感应环网柜的电压,通过控制模块控制地刀挂锁开锁或闭锁,能够实时监测环网柜设备的带电状态,在检修过程中不需要人工去确定环网柜是否带电,提高了带电检测的可靠性,能够防止由于误操作导致带电合地刀,有利于保障生命财产和设备的安全。(The embodiment of the invention discloses an intelligent control device and system for a ring main unit ground knife padlock and a ground knife padlock device, wherein the control device comprises a potential difference sensing module, a filtering module, a voltage comparison module and a control module; the voltage comparison module is used for comparing the voltage output by the filtering module with a preset voltage and generating a trigger signal; the control module is used for generating a first control signal according to the trigger signal so as to control the state of the ground knife padlock. According to the technical scheme provided by the embodiment of the invention, the potential difference sensing module is adopted to sense the voltage of the ring main unit, the control module is used for controlling the unlocking or locking of the padlock of the grounding switch, the live state of the ring main unit equipment can be monitored in real time, the ring main unit does not need to be manually determined whether to be live or not in the maintenance process, the reliability of live detection is improved, the situation that the grounding switch is closed in a live state due to misoperation can be prevented, and the safety of lives, properties and equipment is favorably guaranteed.)

1. The utility model provides a looped netowrk cabinet ground sword padlock intelligent control device which characterized in that includes: the device comprises a potential difference induction module, a filtering module, a voltage comparison module and a control module;

The input end of the potential difference induction module is connected with the ring main unit, and the potential difference induction module is used for inducing the voltage of the ring main unit and outputting the voltage from the output end of the ring main unit;

the input end of the filtering module is electrically connected with the output end of the potential difference induction module, the output end of the filtering module is electrically connected with the input end of the voltage comparison module, and the voltage comparison module is used for comparing the voltage output by the filtering module with a preset voltage and generating a trigger signal;

the input end of the control module is electrically connected with the output end of the voltage comparison module, the output end of the control module is connected with the ground knife padlock, and the control module is used for generating a first control signal according to the trigger signal so as to control the state of the ground knife padlock.

2. The intelligent control device for the ring main unit earthing switch padlock according to claim 1, characterized by further comprising a first communication module;

the input end of the first communication module is electrically connected with the output end of the control module, the output end of the first communication module is in communication connection with the ground-knife padlock, the first communication module is used for outputting a second control signal to the ground-knife padlock according to the first control signal, and the ground-knife padlock is unlocked or locked according to the second control signal.

3. The intelligent control device for the ring main unit ground knife padlock according to claim 1, wherein the potential difference sensing module comprises a voltage sensor, an amplifier, a first resistor and a first capacitor;

the first end of the voltage sensor is electrically connected with the first input end of the amplifier, the second input end of the amplifier is grounded, the output end of the amplifier is electrically connected with the input end of the filtering module, and the second end of the voltage sensor is grounded;

the first end of the first resistor is electrically connected with the first input end of the amplifier, the second end of the first resistor is electrically connected with the output end of the amplifier, and the first capacitor is connected with the first resistor in parallel.

4. The intelligent control device for the ring main unit earthing switch padlock according to claim 3, wherein the voltage sensor is a potential difference induction sensor.

5. An intelligent control system for a ring main unit floor knife padlock, comprising the intelligent control device for a ring main unit floor knife padlock as claimed in any one of claims 1 to 4, and further comprising a floor knife padlock main body, wherein the floor knife padlock is arranged in the floor knife padlock main body, and the floor knife padlock main body is in communication connection with the intelligent control device for a ring main unit floor knife padlock.

6. The intelligent control system for a ring main unit ground knife padlock as claimed in claim 5, wherein the ground knife padlock main body comprises a second communication module, a driving module, a motor and a power module, the second communication module, the driving module and the motor are respectively electrically connected with the power module, and the motor is electrically connected with the ground knife padlock;

the input end of the second communication module is in communication connection with the output end of the first communication module, and the output end of the second communication module outputs a second control signal sent by the first communication module;

the input end of the driving module is electrically connected with the output end of the second communication module, the output end of the driving module is electrically connected with the motor, and the driving module is used for driving the motor according to the second control signal so as to unlock or lock the ground knife padlock.

7. The intelligent control system for the ring main unit earthing switch padlock according to claim 6, wherein the driving module comprises a control processing chip and a driving circuit, and the control processing chip comprises a signal input end and a signal output end;

the signal input end of the control processing chip is electrically connected with the output end of the second communication module, and the control processing chip is used for identifying the validity of the second control signal;

The input end of the driving circuit is electrically connected with the signal output end of the control processing chip, the output end of the driving circuit is electrically connected with the motor, and the driving circuit is used for driving the motor according to the second control signal so as to unlock or lock the ground knife padlock.

8. The intelligent control system for a ring main unit, ground knife and padlock according to claim 7, wherein the driving circuit is further configured to:

if the second control signal is effective, the motor is driven to enable the ground knife padlock to be in a locking state;

and if the second control signal is invalid, driving the motor to enable the ground knife padlock to be in an unlocking state.

9. The intelligent control system for a ring main unit earthing switch padlock according to claim 5, wherein the intelligent control system for a ring main unit earthing switch padlock further comprises an induction node, the intelligent control device for a ring main unit earthing switch padlock is arranged inside the induction node, and the induction node is connected with a live display panel of the ring main unit through a jack.

10. A locking device for a ground switch, characterized by comprising the intelligent control system for a ground switch padlock of a ring main unit according to any one of claims 5 to 9.

Technical Field

The embodiment of the invention relates to the technical field of power electronics, in particular to an intelligent control device and system for a ring main unit ground knife padlock and a ground knife padlock device.

Background

In an electric power transmission and distribution system, a ring network switch cabinet (ring network cabinet) plays an important role in the processes of power generation, power transmission, power distribution and electric energy conversion, and can realize the functions of opening and closing, protection, monitoring and control of a circuit. And the grounding knife switch (grounding knife) plays a vital role in the operation, maintenance and overhaul of the switch cabinet.

At present, only one mechanical lock is usually hung on a ground switch in a ring main unit, a key is needed to unlock the ring main unit manually, and the ring main unit is not associated with whether a cable head in the ring main unit is electrified or not, so that the ring main unit is low in safety and reliability, and has the risk of being electrified to be connected with the ground switch.

Disclosure of Invention

The embodiment of the invention provides an intelligent control device and system for a ring main unit and a ground knife padlock device, which are used for monitoring the live state of a ring main unit in real time and further improving the safety and reliability of the ground knife padlock.

In a first aspect, an embodiment of the present invention provides an intelligent control device for a ring main unit, including: the device comprises a potential difference induction module, a filtering module, a voltage comparison module and a control module;

The input end of the potential difference induction module is connected with the ring main unit, and the potential difference induction module is used for inducing the voltage of the ring main unit and outputting the voltage from the output end of the ring main unit;

the input end of the filtering module is electrically connected with the output end of the potential difference induction module, the output end of the filtering module is electrically connected with the input end of the voltage comparison module, and the voltage comparison module is used for comparing the voltage output by the filtering module with a preset voltage and generating a trigger signal;

the input end of the control module is electrically connected with the output end of the voltage comparison module, the output end of the control module is connected with the ground knife padlock, and the control module is used for generating a first control signal according to the trigger signal so as to control the state of the ground knife padlock.

Optionally, the system further comprises a first communication module;

the input end of the first communication module is electrically connected with the output end of the control module, the output end of the first communication module is in communication connection with the ground-knife padlock, the first communication module is used for outputting a second control signal to the ground-knife padlock according to the first control signal, and the ground-knife padlock is unlocked or locked according to the second control signal.

Optionally, the potential difference sensing module comprises a voltage sensor, an amplifier, a first resistor and a first capacitor;

the first end of the voltage sensor is electrically connected with the first input end of the amplifier, the second input end of the amplifier is grounded, the output end of the amplifier is electrically connected with the input end of the filtering module, and the second end of the voltage sensor is grounded;

the first end of the first resistor is electrically connected with the first input end of the amplifier, the second end of the first resistor is electrically connected with the output end of the amplifier, and the first capacitor is connected with the first resistor in parallel.

Optionally, the voltage sensor is a potential difference induction sensor.

In a second aspect, an embodiment of the present invention further provides an intelligent control system for a ring main unit ground knife padlock, where the intelligent control system for a ring main unit ground knife padlock includes the intelligent control device for a ring main unit ground knife padlock of the first aspect, and the intelligent control system for a ring main unit ground knife padlock further includes a ground knife padlock main body, the ground knife padlock is disposed in the ground knife padlock main body, and the ground knife padlock main body is in communication connection with the intelligent control device for a ring main unit ground knife padlock.

Optionally, the ground knife padlock body comprises a second communication module, a driving module, a motor and a power module, the second communication module, the driving module and the motor are respectively electrically connected with the power module, and the motor is electrically connected with the ground knife padlock;

the input end of the second communication module is in communication connection with the output end of the first communication module, and the output end of the second communication module outputs a second control signal sent by the first communication module;

the input end of the driving module is electrically connected with the output end of the second communication module, the output end of the driving module is electrically connected with the motor, and the driving module is used for driving the motor according to the second control signal so as to unlock or lock the ground knife padlock.

Optionally, the driving module includes a control processing chip and a driving circuit, and the control processing chip includes a signal input end and a signal output end;

the signal input end of the control processing chip is electrically connected with the output end of the second communication module, and the control processing chip is used for identifying the validity of the second control signal;

the input end of the driving circuit is electrically connected with the signal output end of the control processing chip, the output end of the driving circuit is electrically connected with the motor, and the driving circuit is used for driving the motor according to the second control signal so as to unlock or lock the ground knife padlock.

Optionally, the driving circuit is further configured to:

if the second control signal is effective, the motor is driven to enable the ground knife padlock to be in a locking state;

and if the second control signal is invalid, driving the motor to enable the ground knife padlock to be in an unlocking state.

Optionally, looped netowrk cabinet earthing switch padlock intelligence control system still includes the induction node, looped netowrk cabinet earthing switch padlock intelligence control device set up in inside the induction node, the induction node pass through the jack with the electrified display panel of looped netowrk cabinet is connected.

In a third aspect, an embodiment of the present invention further provides a ground knife padlock device, including the intelligent control system for a ground knife padlock of a ring main unit according to the second aspect.

The embodiment of the invention provides an intelligent control device and system for a ring main unit ground knife padlock and a ground knife padlock device, wherein the intelligent control device for the ring main unit ground knife padlock comprises a potential difference induction module, a filtering module, a voltage comparison module and a control module; the input end of the potential difference induction module is connected with the ring main unit, and the potential difference induction module is used for inducing the voltage of the ring main unit and outputting the voltage from the output end of the ring main unit; the input end of the filtering module is electrically connected with the output end of the potential difference induction module, the output end of the filtering module is electrically connected with the input end of the voltage comparison module, and the voltage comparison module is used for comparing the voltage output by the filtering module with a preset voltage and generating a trigger signal; the input end of the control module is electrically connected with the output end of the voltage comparison module, the output end of the control module is connected with the ground knife padlock, and the control module is used for generating a first control signal according to the trigger signal so as to control the state of the ground knife padlock. According to the technical scheme provided by the embodiment of the invention, the voltage of the ring main unit is sensed through the potential difference sensing module, whether the ring main unit is electrified or not is judged by combining the filtering module and the voltage comparison module, the first control signal is generated, the control module controls the ground switch padlock to be unlocked or locked according to the first control signal, the electrified state of the ring main unit equipment can be monitored in real time, the condition that whether the ring main unit is electrified or not is determined without manpower in the maintenance process, the state of the ground switch padlock is automatically controlled through the control module, the electrified ground switch can be prevented from being closed due to misoperation, and therefore, the safe operation of the ring main unit equipment is favorably improved, and the life and property safety of.

Drawings

Fig. 1 is a schematic structural diagram of an intelligent control device for a ring main unit ground knife padlock according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of an intelligent control device for a ring main unit ground knife padlock according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of an intelligent control device for a ring main unit ground knife padlock according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of an intelligent control system for a ring main unit ground knife padlock according to a fourth embodiment of the present invention;

fig. 5 is a schematic structural diagram of an intelligent control system for a ring main unit ground knife padlock according to a fifth embodiment of the present invention;

fig. 6 is a schematic structural diagram of an intelligent control system for a ring main unit ground switch padlock according to a sixth embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

As described in the background, as the ring network of power transmission and distribution systems increases, the complexity of the line topology also increases. When the line ring main unit is in the process of transferring power supply, the original incoming line ring main unit can be changed into an outgoing line ring main unit due to the change of a line topological structure, so that the situation of electrified ground knife closing occurs in the maintenance process, and the five-prevention rule of electrical safety is seriously violated. Wherein, the five prevention means preventing the isolating switch from being switched on and off with load; the circuit breaker, the load switch and the contactor are prevented from being switched off and on by mistake; the circuit breaker and the load switch are prevented from being closed when the grounding switch is in a closed position; prevent the earthing switch from being switched on by mistake when electrified; prevent the wrong entering into the electrified interval. In the prior ring main unit, only one mechanical lock is hung on a ground knife, and a key is needed to unlock the ring main unit manually, so that the risk of electric shock exists; and the existing ground knife padlock has no any association with a cable head in the ring main unit when being electrified, only can play a role of warning, and cannot realize the function of locking the ground knife in an electrified way and preventing the ground knife from being closed by mistake.

In view of this, the embodiment of the present invention provides an intelligent control device and system for a ring main unit ground knife padlock, and a ground knife padlock device, where the intelligent control device for a ring main unit ground knife padlock includes a potential difference sensing module, a filtering module, a voltage comparison module, and a control module; the input end of the potential difference induction module is connected with the ring main unit, and the potential difference induction module is used for inducing the voltage of the ring main unit and outputting the voltage from the output end of the ring main unit; the input end of the filtering module is electrically connected with the output end of the potential difference induction module, the output end of the filtering module is electrically connected with the input end of the voltage comparison module, and the voltage comparison module is used for comparing the voltage output by the filtering module with a preset voltage and generating a trigger signal; the input end of the control module is electrically connected with the output end of the voltage comparison module, the output end of the control module is connected with the ground knife padlock, and the control module is used for generating a first control signal according to the trigger signal so as to control the state of the ground knife padlock. According to the technical scheme provided by the embodiment of the invention, the voltage of the ring main unit is sensed through the potential difference sensing module, whether the ring main unit is electrified or not is judged by combining the filtering module and the voltage comparison module, the first control signal is generated, the control module controls the ground switch padlock to be unlocked or locked according to the first control signal, the electrified state of the ring main unit equipment can be monitored in real time, the condition that whether the ring main unit is electrified or not is determined without manpower in the maintenance process, the state of the ground switch padlock is automatically controlled through the control module, the electrified ground switch can be prevented from being closed due to misoperation, and therefore, the safe operation of the ring main unit equipment is favorably improved, and the life and property safety of.

The above is the core idea of the present invention, and the following will clearly and completely describe the technical solution in the embodiment of the present invention with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.