CN214227823U

CN214227823U - Modular operation loop

Info

Publication number: CN214227823U
Application number: CN202022751773.7U
Authority: CN
Inventors: 黄玉福; 张敬安
Original assignee: Bajiao Power Plant Of Huaneng Shandong Power Generation Co ltd
Current assignee: Bajiao Power Plant Of Huaneng Shandong Power Generation Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-09-17
Anticipated expiration: 2030-11-24

Abstract

The utility model relates to an electric power system protection device technical field particularly, is a modular operation return circuit, including trip return circuit and combined floodgate return circuit, trip return circuit is including the tripping operation trigger module and the tripping operation power electronic module of establishing ties, tripping operation power electronic module links to each other with the tripping operation coil of external switch, combined floodgate return circuit is including the combined floodgate trigger module and the combined floodgate power electronic module of establishing ties, combined floodgate power electronic module links to each other with the combined floodgate coil of external switch, trip return circuit with the positive negative pole that operating power supply was inserted respectively to combined floodgate return circuit. The action time of a switch tripping and closing coil of the modular operation loop is nanosecond, the high-voltage and high-current resistance is realized, and the integrated installation size is greatly reduced compared with that of a conventional operation loop.

Description

Modular operation loop

Technical Field

The utility model relates to an electric power system protection device technical field particularly, is a modular operation return circuit.

Background

The power system protection device is configured with an operation loop for ensuring the reliability of protection action, and the operation loop mainly plays three roles: a) the capacity of the contact is increased, if the tripping and closing loop of the switch is directly switched on and off by the contact of the protection element, the outlet contact is easily burnt, so the high-capacity intermediate relay of the operation loop is used for restarting; b) the number of the contacts is increased, for example, the number of the contacts such as TWJ, HWJ and the like which can be provided by the switch body is limited, and the contacts are increased through an operation loop, so that logic functions such as tripping position indication, control loop monitoring, non-corresponding starting reclosure and the like are realized; c) preventing a switch jump function.

The conventional operation loop is a relay type operation loop and comprises a tripping relay, a closing relay, a switching-on subsequent electric appliance, a monitoring relay and the like. After a tripping command is sent by a protection CPU of the relay type operation loop, 8ms is needed for starting a tripping relay, 10ms is needed for the action time of the tripping relay TBJ and a closing relay HBJ, the protection action time is long, and the sensitivity is low; the current required by the relay contact is small when the relay contact normally acts, and the relay contact is burnt by a large current generated when the switch trips; the conventional relay type operation loop adopts an electromagnetic principle, and has large coil volume and large occupied circuit area.

SUMMERY OF THE UTILITY MODEL

In particular, the utility model provides a solve the above-mentioned problem the utility model provides a modular operation circuit, the action time is short, and high pressure resistant heavy current and volume are minimum.

The utility model provides a modular operation return circuit, includes trip return circuit and combined floodgate return circuit, the trip return circuit is including tripping operation trigger module and the tripping operation power electronic module of establishing ties, tripping operation power electronic module links to each other with external switch's trip coil, combined floodgate return circuit is including the combined floodgate trigger module and the combined floodgate power electronic module of establishing ties, combined floodgate power electronic module links to each other with external switch's combined floodgate coil, the trip return circuit with combined floodgate return circuit inserts operating power source's positive negative pole respectively.

The tripping power electronic module comprises a positive tripping power electronic module and a negative tripping power electronic module, the positive tripping power electronic module and the negative tripping power electronic module are connected in parallel to the tripping trigger module, the positive tripping power electronic module is connected to the positive pole of an operating power supply, the negative tripping power electronic module is connected to the negative pole of the operating power supply, and the connection common end of the positive tripping power electronic module and the negative tripping power electronic module is connected with a tripping coil of an external switch; the switching-on power electronic module comprises a positive switching-on power electronic module and a negative switching-on power electronic module, the positive switching-on power electronic module and the negative switching-on power electronic module are connected in parallel to the switching-on trigger module, the positive switching-on power electronic module is connected to the positive pole of the operating power supply, the negative switching-on power electronic module is connected to the negative pole of the operating power supply, and the connection common end of the positive switching-on power electronic module and the negative switching-on power electronic module is connected with a switching-on coil of an external switch.

Preferably, the trip trigger module is connected in series with a trip timer module.

Preferably, the closing triggering module is connected in series with a closing timer module.

Preferably, a tripping resistor is connected in series between the positive tripping power electronic module and the positive pole of the operating power supply.

Preferably, a closing resistor is connected in series between the positive closing power electronic module and the positive electrode of the operating power supply.

The utility model has the advantages that the trigger module can send nanosecond pulse signals, so that the opening delay time of the operation loop is reduced to nanosecond level, and the action time of the operation loop is greatly reduced compared with the action time of the existing relay type operation loop; the power electronic module is high-voltage resistant, can amplify current, can adapt to large current generated when a switch is switched on and switched off, and cannot cause the problem that an operation loop is burnt; the single module used is small in installation size, and the volume and the area occupied by the operation loop are greatly reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a block diagram of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and in combination with the embodiments of the present invention, it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, a modular operation circuit includes a trip circuit and a closing circuit, the trip circuit includes a trip trigger module and a trip electronic power module connected in series, the trip electronic power module is connected to a trip coil of an external switch, the closing circuit includes a closing trigger module and a closing electronic power module connected in series, the closing electronic power module is connected to a closing coil of the external switch, and the trip circuit and the closing circuit are respectively connected to an anode and a cathode of an operation power supply.

In this embodiment, the trigger module is FAN73932, the power electronic module is an IGBT, the turn-on delay time of the power electronic module is 140ns, the withstand voltage is above 1000V, and the output amplified current is not lower than 60A. The trigger module receives a tripping or closing command for protecting the CPU and outputs a 2A small current command pulse, and the power electronic module receives the command pulse of the trigger module, amplifies the received small current command pulse and outputs a tripping or closing action command.

The tripping power electronic module comprises a positive tripping power electronic module and a negative tripping power electronic module, the positive tripping power electronic module and the negative tripping power electronic module are connected in parallel to the tripping trigger module, the positive tripping power electronic module is connected to the positive pole of an operating power supply, the negative tripping power electronic module is connected to the negative pole of the operating power supply, and the connection common end of the positive tripping power electronic module and the negative tripping power electronic module is connected with a tripping coil of an external switch; the power electronic module sends a tripping action command to drive a tripping coil of the external switch so as to trip the external switch.

The switching-on power electronic module comprises a positive switching-on power electronic module and a negative switching-on power electronic module, the positive switching-on power electronic module and the negative switching-on power electronic module are connected in parallel to the switching-on trigger module, the positive switching-on power electronic module is connected to the positive pole of an operating power supply, the negative switching-on power electronic module is connected to the negative pole of the operating power supply, and the connection common end of the positive switching-on power electronic module and the negative switching-on power electronic module is connected with a switching-on coil of an external switch; the power electronic module sends a closing action command to drive a closing coil of the external switch so that the external switch is closed.

In this embodiment, the trip triggering module is connected in series with a trip timer module, the closing triggering module is connected in series with a closing timer module, the timer module employs an ICM7555, and the timer module is configured to control a pulse width of a command pulse output by the triggering module, so as to ensure reliable connection or disconnection of the power electronic module.

In this embodiment, a trip resistor is connected in series between the positive trip power electronic module and the positive pole of the operating power supply, a closing resistor is connected in series between the positive closing power electronic module and the positive pole of the operating power supply, and the trip resistor and the closing resistor can select different resistance values according to voltage and current of different operating power supplies, so that the operating circuit is suitable for various operating power supplies, and the trip circuit and the closing circuit can be protected.

In the embodiment, the time for driving the external switch to trip and close the coil is within 1000ns, which is greatly reduced compared with the millimeter-scale action time of the conventional relay type operation loop. The tripping and closing coil current of the operation loop is not lower than 60A, meanwhile, the high-integration device is modularized, the maximum installation size of a single module is 2cm, the integrated installation size of each module is 7cm, and the area of a printed board can be greatly reduced.

Claims

1. A modular operating circuit comprising a trip circuit and a closing circuit, characterized in that said trip circuit comprises a trip trigger module and a trip power electronic module connected in series, said trip power electronic module being connected to a trip coil of a switch; the switching-on loop comprises a switching-on triggering module and a switching-on power electronic module which are connected in series, and the switching-on power electronic module is connected with a switching-on coil of the switch; and the tripping circuit and the closing circuit are respectively connected to the positive electrode and the negative electrode of an operating power supply.

2. A modular operating circuit as claimed in claim 1, wherein said trip power electronics module comprises a positive trip power electronics module and a negative trip power electronics module, said positive trip power electronics module and said negative trip power electronics module being connected in parallel to said trip trigger module, said positive trip power electronics module being connected to the positive pole of the operating power source, said negative trip power electronics module being connected to the negative pole of the operating power source, the common connection terminals of said positive trip power electronics module and said negative trip power electronics module being connected to the trip coil of the switch; the switching-on power electronic module comprises a positive switching-on power electronic module and a negative switching-on power electronic module, the positive switching-on power electronic module and the negative switching-on power electronic module are connected in parallel to the switching-on trigger module, the positive switching-on power electronic module is connected to the positive pole of the operating power supply, the negative switching-on power electronic module is connected to the negative pole of the operating power supply, and the connection common end of the positive switching-on power electronic module and the negative switching-on power electronic module is connected with a switching-on coil of the switch.

3. The modular operating circuit as claimed in claim 2, wherein the trip trigger module is connected in series with a trip timer module; the closing trigger module is connected with a closing timer module in series.

4. A modular operating circuit as claimed in claim 2, wherein a trip resistor is connected between the positive trip power electronic module and the positive operating power supply; a closing resistor is connected between the positive closing power electronic module and the positive pole of the operating power supply.