CN205791495U - The protection of controller switching equipment intelligent switch-on controls device - Google Patents

Abstract

The utility model relates to an intelligent closing protection control device for power distribution equipment, which comprises a three-phase input protection switch, a three-phase surge voltage protection circuit, a micro-power consumption three-phase rectification and voltage stabilization circuit, a three-phase overvoltage/undervoltage/ Phase failure/phase deviation/phase sequence protection circuit, energy storage delay circuit, closing delay circuit, closing execution circuit, closing transfer operation circuit, operation protection circuit, tripping execution circuit. The utility model has the following advantages: 1. It can automatically detect whether there is overvoltage, undervoltage, phase loss, phase deviation and phase sequence change in the incoming power supply before closing; 2. It can detect various overvoltages, Safety protection is implemented in the case of undervoltage, phase loss, phase deviation and phase sequence error. 3. It can monitor whether the power supply is abnormal in real time online; 4. The delay setting of energy storage and closing of the invention can be adjusted independently; The closing circuit is separated.

Description

Intelligent closing protection control device for power distribution equipment

technical field

The utility model belongs to the field of power equipment, in particular to an intelligent closing protection control device for power distribution equipment.

Background technique

With the continuous improvement of the national economy and people's living standards, the safety and reliability of power supply is becoming more and more important. At present, the main control switches commonly used in low-voltage power distribution equipment in China are mostly AC contactors or universal circuit breakers. When the high-voltage line has a power outage and the power transmission is resumed, it is necessary to manually go to the power distribution room for power transmission operation, which is a waste of manpower. and power supply time; and there is no effective protection for whether the incoming power supply is qualified after power restoration. For example, abnormal conditions such as phase loss, phase deviation, overvoltage, undervoltage, phase sequence change caused by line construction, etc. caused by disconnection of the incoming power supply, drop insurance fuse, etc., have brought serious safety hazards to the user's electricity consumption. . Therefore, an intelligent closing protection control device is needed to save manpower, reduce power outage time, and protect the safety of electrical equipment. However, the common automatic closing device for power recovery has shortcomings such as inability to delay closing or imperfect protection function, poor versatility, and single function.

Contents of the invention

The purpose of the utility model is to solve the problem of imperfect protection function and single function in the prior art, and provide an intelligent closing protection control device for power distribution equipment with simple operation, perfect protection function and good versatility.

The utility model is achieved through the following technical solutions:

The intelligent closing protection control device for power distribution equipment is special in that it includes a three-phase input protection switch 1 for the control device to be put into operation and outage, a three-phase surge voltage protection circuit for overvoltage protection 2, and a micro Power consumption three-phase rectification and voltage stabilization circuit 3. Three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit for real-time detection of incoming power supply voltage and phase sequence 4. Energy storage delay circuit 5. Closing delay circuit 7 for delayed closing, closing execution circuit 8 for completing the closing operation of power distribution equipment, closing for interrupting energy storage and closing control circuit power supply, and turning the device into the operation monitoring state The transfer operation circuit 9, the operation protection circuit 10 for protecting the abnormal state of the incoming power supply, and the trip execution circuit 11 for realizing the trip operation of the power distribution equipment;

The three-phase input protection switch 1 is respectively connected with the three-phase surge voltage protection circuit 2, the micro-power consumption three-phase rectification and voltage stabilization circuit 3, and the three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit 4, micro The power consumption three-phase rectification and voltage stabilization circuit 3 provides stable working power for the switching on and running circuit 9 and the running protection circuit 10. The circuit 9 is connected to the energy storage delay circuit 5, and the energy storage delay circuit 5 is connected to the closing delay circuit 7. The closing delay circuit 7 can be connected to the closing and running circuit 9, and the closing delay circuit 7 It can drive the closing execution circuit 8; the three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit 4 drives the tripping execution circuit 11 through the operation protection circuit 10, and the switching operation circuit 9 is connected to the operation protection circuit 10 , when the operation protection circuit 10 is working, the switching operation circuit 9 is transferred to the closing preparation state.

An improvement of the utility model is that the intelligent switch-on protection control device for power distribution equipment also includes an energy storage execution circuit 6 for completing the energy storage operation of the universal circuit breaker, which is used for the distribution system where the main control switch is a universal circuit breaker. For electrical equipment, the energy storage delay circuit 5 drives the energy storage execution circuit 6 to work.

Another improvement of the utility model is that the intelligent switch-on protection control device for power distribution equipment also includes an abnormal alarm circuit 12. When the incoming power supply is abnormal, an alarm signal can be sent to indicate that the incoming power supply is abnormal. The three-phase rectification and voltage stabilization circuit 3 provides stable working power for it, and the operation protection circuit 10 drives the abnormal alarm circuit 12 to work.

Another improvement of the utility model is that, in order to facilitate the connection with various main control switches as AC contactors or universal circuit breakers, which has good versatility, the energy storage execution circuit 6, closing execution The circuit 8 and the tripping execution circuit 11 are respectively equipped with a group of normally open and normally closed passive contacts corresponding to the required connection circuit relays.

The utility model has the following advantages: 1. It can automatically detect whether there is overvoltage, undervoltage, phase loss, phase deviation and phase sequence change in the incoming power supply before closing. The electrical safety of the equipment. 2. It can implement safety protection under various overvoltage, undervoltage, phase loss, phase deviation and phase sequence errors of the three-phase power supply. 3. After the closing task is completed, the invention can monitor whether the power supply is abnormal in real time. When an abnormal situation occurs, it can complete trip protection and send out an audible and visual alarm signal. After the abnormality is eliminated, it can automatically close the switch and send power. 4. The delay setting of energy storage and closing of the invention, the time can be adjusted independently, and the energy storage, closing and tripping drive all adopt independent relay passive normally open and normally closed contacts, which is convenient for tripping and closing with power distribution equipment Agency Mating. 5. After the closing operation of the invention is completed, it can be automatically separated from the energy storage and closing circuit of the power distribution equipment, without affecting the manual on-site operation.

Description of drawings

Fig. 1: schematic diagram of circuit connection of the present utility model;

In the figure: 1: Three-phase input protection switch; 2: Three-phase surge voltage protection circuit; 3: Micro-power consumption three-phase rectification and voltage stabilization circuit; 4: Three-phase overvoltage/undervoltage/phase failure/bias/phase 5: Energy storage delay circuit; 6: Energy storage execution circuit; 7: Closing delay circuit; 8: Closing execution circuit; 9: Closing transfer circuit; 10: Operation protection circuit; 11: Trip execution circuit; 12: Abnormal alarm circuit.

detailed description

Below with reference to accompanying drawing, provide the specific embodiment of the present utility model, be used for further explaining the structure of the present utility model.

Example 1

The intelligent closing protection control device for power distribution equipment in this embodiment, referring to Figure 1, is used for power distribution equipment whose main control switch is an AC contactor.

The AC contactor control circuit on the power distribution equipment is equipped with start and stop buttons. The start button is normally open, and the stop button is normally closed. On the start button of the contactor, the normally closed contact of the trip execution circuit 11 is connected in series with the stop button circuit of the AC contactor.

The energy storage delay of the intelligent closing protection control device of the power distribution equipment is set to zero, and the closing delay is set to 10s.

The specific working process is as follows:

The working process of normal closing of the incoming call: when the incoming power supply is restored, that is, L1, L2, and L3 are energized, and connected to the three-phase AC power supply through the three-phase input protection switch 1, and the three-phase surge voltage protection circuit 2 provides surge protection. Surge overvoltage protection to prevent overvoltage damage to the device. The micro-power consumption three-phase rectification and voltage stabilization circuit 3 works normally, and the three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit 4 automatically detects whether the incoming power supply is abnormal. If there is any abnormality, the energy storage is prohibited from closing Work. After the three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit 4 detects that the incoming power supply is normal, the energy storage delay circuit 5 is connected to the energy storage delay circuit 5 through the closing switch operation circuit 9, and then the energy storage delay circuit 5 is connected. Turn on the closing delay circuit 7, after the closing delay circuit 7 delays for 10s, the closing execution circuit 8 is driven to act, and the passive normally open contact of the closing execution circuit 8 is shorted to the start button of the power distribution equipment to complete the closing Power transmission. At the same time of closing and power transmission, the closing delay circuit 7 is connected to the closing and running circuit 9, and the closing and switching to the running circuit 9, and the control power supply of the energy storage and closing control part is cut off, and it is transferred to the operation monitoring and protection state, reducing the self- Energy consumption, prolonging the service life of the energy storage and closing circuit, without affecting the manual on-site power-off and transmission operation. The normally open contact of the closing execution circuit 9 is separated from the start button of the power distribution equipment to complete the automatic closing and power transmission operation.

The working process of abnormal protection during operation: during operation, when the three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit 4 detects that the incoming power supply has overvoltage, undervoltage, phase loss, When the situation is equal, a signal is given to automatically start the operation protection circuit 10, and the operation protection circuit 10 drives the trip execution circuit 11 to perform a trip operation, and the normally closed contact of the trip execution circuit 11 disconnects the stop button circuit of the power distribution equipment, realizing power distribution The tripping and shutdown of equipment protects the safety of electrical equipment. The operation protection circuit 10 drives the abnormal alarm circuit at the same time, sends out an audible and visual alarm signal, prompts that the incoming power supply is abnormal, and the tripping protection has been executed. At the same time as tripping, the closing and running circuit 9 is transferred to the closing preparation state. When the three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit 4 detects that the incoming power supply returns to normal, the device will repeat Perform delayed energy storage and closing operations to restore normal power supply.

During the operation of the device, the micro-power consumption three-phase rectification and voltage stabilization circuit 3 provides working power for the closing and turning operation circuit 9, the operation protection circuit 10, and the abnormal alarm circuit 12, so as to ensure that the trip can be reliably completed when any phase power fails and protection.

Example 2

The intelligent switch-on protection control device for power distribution equipment in this embodiment, referring to Figure 1, is used for power distribution equipment where the main control switch is a universal circuit breaker.

The universal circuit breaker on the power distribution equipment adopts the normally open button mode, and has three operations of "energy storage", "closing" and "opening". During installation, connect the normally open contact of the energy storage execution circuit 6 of the invention to the "energy storage" button of the power distribution equipment, and connect the normally open contact of the closing execution circuit 8 to the "closing" button of the power distribution equipment On the button, connect the normally open contact of the trip execution circuit 11 to the "opening" button of the power distribution equipment.

The energy storage delay of the inventive device is set to 2s, and the closing delay is set to 10s.

The specific working process is as follows:

The working process of normal closing of the incoming call: the three-phase AC power supply is connected through the three-phase input protection switch 1, and the three-phase surge voltage protection circuit 2 provides surge overvoltage protection to prevent overvoltage damage to the device. The micro-power consumption three-phase rectification and voltage stabilization circuit 3 works normally, and the three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit 4 automatically detects whether the incoming power supply is abnormal. If there is any abnormality, the energy storage is prohibited from closing Work.

After the three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit 4 detects that the incoming power supply is normal, the energy storage delay circuit 5 is connected to the energy storage delay circuit 5 through the closing switch operation circuit 9, and the energy storage delay circuit 5 works. After a delay of 2s, the energy storage execution circuit 6 is driven to act, the normally open contact of the energy storage execution circuit 6 is closed, and the "energy storage" button on the power distribution equipment is shorted to complete the "energy storage" operation.

The energy storage delay circuit 5 is then connected to the closing delay circuit 7. After the closing delay circuit 7 delays for 10s, the closing execution circuit 8 is driven to act, and the passive normally open contact of the closing execution circuit 8 is short-circuited to the power distribution The start button of the equipment completes the closing and power transmission. At the same time of closing and power transmission, the closing delay circuit 7 is connected to the closing and turning operation circuit 9, and the closing and turning operation circuit 9 cuts off the control power supply of the energy storage and closing control part, and turns to the operation monitoring and protection state. The normally open contact of the closing execution circuit 9 is separated from the start button of the power distribution equipment to complete the automatic closing and power transmission operation.

The working process of abnormal protection during operation: during operation, when the three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit 4 detects that the incoming power supply has overvoltage, undervoltage, phase loss, When the situation is equal, a signal is given to automatically start the operation protection circuit 10, and the operation protection circuit 10 drives the trip execution circuit 11 to perform a trip operation. "Open" operation. The operation protection circuit 10 drives the abnormal alarm circuit at the same time, sends out an audible and visual alarm signal, prompts that the incoming power supply is abnormal, and the tripping protection has been executed. At the same time as tripping, the closing and running circuit 9 is transferred to the closing preparation state. When the three-phase overvoltage/undervoltage/phase failure/phase deviation/phase sequence protection circuit 4 detects that the incoming power supply returns to normal, the device will repeat Perform delayed energy storage and closing operations to restore normal power supply.

During the operation of the device, the micro-power consumption three-phase rectification and voltage stabilization circuit 3 provides working power for the closing and switching operation circuit 9 , the operation protection circuit 10 , and the abnormal alarm circuit 12 .

The utility model provides a simple, safe and reliable automatic closing protection scheme, which realizes automatic detection of overvoltage, undervoltage, phase loss, phase failure, phase deviation and For abnormalities such as phase sequence changes, it will automatically delay closing after detection is normal, and monitor the power supply for the above abnormalities in real time during operation. When closed, maintain normal and timely power supply.

The invention can provide real-time and reliable protection for overvoltage, undervoltage, phase loss, phase deviation, and phase sequence changes of the power supply. It can reliably protect any one-phase power supply when an abnormality occurs. Electricity.

After the line is restored to power, the delayed closing and power transmission can effectively avoid the impact of direct power transmission with load on the power grid and protect the safety of the power grid.

The invention can be applied to various power distribution equipment with an AC contactor or a universal circuit breaker as the main control switch to realize intelligent closing and protection control.

The preferred embodiment of the utility model has been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the specific details of the above-mentioned embodiment, and within the scope of the technical concept of the utility model, the technical solution of the utility model can be carried out in many ways. A simple deformation, these simple deformations all belong to the protection scope of the present utility model.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way if there is no contradiction. The combination method will not be explained separately.

In addition, any combination of various implementations of the present invention can also be made, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (4)

1. the protection of controller switching equipment intelligent switch-on controls device, it is characterised in that: include controlling the three-phase input that device puts into operation, stops transport Protection switch (1), the three-phase power surge voltage protection circuit (2) of offer overvoltage protection, the Micro Energy Lose of offer steady operation power supply Three phase rectifier mu balanced circuit (3), in real time detection incoming power voltage and phase sequence three-phase overvoltage the most normally/under-voltage/disconnected phase/partially Phase/phase sequence protection circuit (4), energy-storage delay circuit (5), for time-delay closing combined floodgate delay circuit (7), be used for distribution The combined floodgate of equipment closing operation performs circuit (8), is used for interrupting energy storage and contacting controling circuit power supply and proceeds to device run prison Combined floodgate transhipment row circuit (9) of survey state, for the running protection circuit (10) of incoming power abnormal condition protection, realize right The tripping operation of controller switching equipment trip operation performs circuit (11)；

Three-phase input protection switch (1) respectively with three-phase power surge voltage protection circuit (2), Micro Energy Lose three phase rectifier mu balanced circuit (3), three-phase overvoltage/under-voltage/disconnected phase/phase/phase sequence protection circuit (4) partially connect, Micro Energy Lose three phase rectifier mu balanced circuit (3) is for closing Lock transhipment row circuit (9), running protection circuit (10) provide steady operation power supply, three-phase overvoltage/under-voltage/disconnected phase/inclined phase/phase sequence Protection circuit (4) by close a floodgate transhipment row circuit (9) with energy-storage delay circuit (5) control be connected, energy-storage delay circuit (5) again with Combined floodgate delay circuit (7) connects, and combined floodgate delay circuit (7) can connect combined floodgate transhipment row circuit (9), and combined floodgate delay circuit (7) can Driving closes a floodgate performs circuit (8)；Three-phase overvoltage/under-voltage/disconnected phase/phase/phase sequence protection circuit (4) partially is by running protection circuit (10) driving tripping operation to perform circuit (11), transhipment row circuit (9) of closing a floodgate is connected with running protection circuit (10), running protection circuit (10), during work, transhipment row circuit (9) of closing a floodgate proceeds to combined floodgate SBR.

2. controller switching equipment intelligent switch-on protection as claimed in claim 1 controls device, it is characterised in that also include for completing Energy storage to omnipotent breaker stored energy operation performs circuit (6), and energy-storage delay circuit (5) drives energy storage to perform circuit (6) work Make.

3. controller switching equipment intelligent switch-on protection as claimed in claim 1 or 2 controls device, it is characterised in that also include abnormal report Alert circuit (12), abnormity alarm circuit (12) provides working power by Micro Energy Lose three phase rectifier mu balanced circuit (3) for it, runs Protection circuit (10) drives abnormity alarm circuit (12) work.

4. controller switching equipment intelligent switch-on protection as claimed in claim 2 controls device, it is characterised in that: described energy storage performs electricity Road (6), combined floodgate perform circuit (8) and tripping operation performs circuit (11) and is respectively provided with corresponding with required connection circuit relay one group Normally opened and normally closed without source contact.