CN215267633U - Three-out-of-two device for alternating current protection - Google Patents

Abstract

The utility model discloses a two devices are got to three of interchange protection, open into module and DO and open out the module including CPU module, HMI interface processing and communication module, SIG signal module, DI, HMI interface processing and communication module DI open into module, DO and open out module and SIG signal module all with CPU module communication connection, DO open out module linked switch 1 and switch 2, first set of main protection device, second set of main protection device and third set of main protection device connect DI and open into the module. The utility model provides a two devices are got to three of interchange protection has improved the reliability of protection action to the superhigh pressure of heavy load and backbone network, special high tension transmission line.

Description

Three-out-of-two device for alternating current protection

Technical Field

The utility model relates to a two devices are got to three of exchange protection belongs to electric power system main equipment relay protection technical field.

Background

The relay protection is a safety barrier of a power system, has great significance for maintaining the safety and stability of a power grid, and generally needs to adopt redundancy configuration in order to avoid protection misoperation or refusal operation caused by the fault of the system.

According to statistics of 'analysis assembly of typical safety accident events of power production' of power grid company in south China between 2016 and 2019, 4 power safety events caused by secondary current circuit fault collision or device misoperation of relay protection are started, and the 4 events cause tripping directly because circuit fault collision or device misoperation causes direct tripping of a circuit breaker. For the protection of the extra-high voltage and extra-high voltage alternating current transmission lines, the technical specification only needs to be configured in a double mode. However, the extra-high voltage and extra-high voltage transmission lines, which are important components of the power system, especially heavy load and backbone network lines, also play an extremely important role in the stability and reliability of the power system: the failure of the alternating current system can cause the failure of direct current commutation; the malfunction of the ac protection may even cause the power system to be unstable and oscillate when it is serious. It is therefore an important task to improve the reliability of the protection action by adopting a safer and more reliable protection outlet trip scheme.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art's defect, provide a three of alternating current protection and get two devices, to the superhigh pressure of heavy load and backbone network, extra-high voltage transmission line, through configuring three sets of main protection, take three to get two logical export tripping operation schemes, improve the reliability of protection action.

In order to achieve the above object, the present invention provides an alternating current protection three-in-two device, which comprises a CPU module, an HMI interface processing and communication module, a SIG signal module, a DI module and a DO module, wherein the HMI interface processing and communication module, the DI module, the DO module and the SIG signal module are all communicatively connected to the CPU module, the DO module connecting switch 1 and the switch 2 are connected, and a first main protection device, a second main protection device and a third main protection device are connected to the DI module.

Preferably, the DO egress module includes a TJA1 port, a TJB1 port, a TJC1 port, a TJA2 port, a TJB2 port, a TJC2 port, a perpetual jump 1 port, and a perpetual jump 2 port, the TJA1 port, the TJB1 port, the TJC1 port, and the perpetual jump 1 port are connected to a first set of trip coils of the switch 1, and the TJA2 port, the TJB2 port, the TJC2 port, and the perpetual jump 2 port are connected to a second set of trip coils of the switch 1, for outputting a switch 1 trip outlet signal to the switch 1 to control the first set of trip coils of the switch 1 and the second set of trip coils of the switch 1 to trip.

Preferably, the DO egress module further comprises a TJA1 port, a TJB1 port, a TJC1 port, a skip 1 port, a TJA2 port, a TJB2 port, a TJC2 port, and a skip 2 port, wherein the TJA1 port, the TJB1 port, the TJC1 port, and the skip 1 port are connected to the first set of trip coils of the switch 2, and the TJA2 port, the TJB2 port, the TJC2 port, and the skip 2 port are connected to the second set of trip coils of the switch 2, for outputting a switch 2 trip outlet signal to the switch 2 to control the first set of trip coils of the switch 2 and the second set of trip coils of the switch 2 to trip.

Preferentially, the DI switching module comprises a protection three-hop A switching-in 1 port, a protection three-hop B switching-in 1 port, a protection three-hop C switching-in 1 port, a protection three-device alarm 1 port and a protection three-device overhaul 1 port, wherein the protection three-hop A switching-in 1 port, the protection three-hop B switching-in 1 port, the protection three-hop C switching-in 1 port and the protection three-hop C switching-in 1 port are connected with an action signal port of a third set of main protection device and used for acquiring an action signal of the third set of main protection device;

the alarm 1 port of the protection three-device is connected with the alarm signal port of the third set of main protection device and is used for acquiring the alarm signal of the third set of main protection device;

and the port of the maintenance 1 of the protection three devices is connected with the maintenance state signal port of the third set of main protection device and is used for acquiring the maintenance state signal of the third set of main protection device.

Preferentially, the DI switching module comprises a protection second-hop A switching-in 1 port, a protection second-hop B switching-in 1 port, a protection second-hop C switching-in 1 port, a protection second-device alarm 1 port and a protection second-device maintenance 1 port, wherein the protection second-hop A switching-in 1 port, the protection second-hop B switching-in 1 port, the protection second-hop C switching-in 1 port and the protection second-hop C switching-in 1 port are connected with action signal ports of a second set of main protection devices and used for acquiring action signals of the second set of main protection devices;

the alarm 1 port of the protection second device is connected with the alarm signal port of the second set of main protection device and is used for acquiring the alarm signal of the second set of main protection device;

the port of the second protection device maintenance 1 is connected with the maintenance state signal port of the second set of main protection device and is used for acquiring the maintenance state signal of the second set of main protection device.

Preferably, the DI switching module includes protecting a one-hop-a switching-in 1 port, protecting a one-hop-B switching-in 1 port, protecting a one-hop-C switching-in 1 port, protecting a one-hop-permanently switching-in 1 port, protecting a one-device alarm 1 port and protecting a one-device maintenance 1 port,

protecting a first-hop-A-switch-in-1 port, protecting a first-hop-B-switch-in-1 port, protecting a first-hop-C-switch-in-1 port and protecting a permanent-hop-switch-in-1 port, wherein the first-hop-A-switch-in-1 port is connected with an action signal port of a first set of main protection devices and is used for acquiring action signals of the first set of main protection devices;

the port of the protection device alarm 1 is connected with the alarm signal port of the first set of main protection device and is used for acquiring the alarm signal of the first set of main protection device;

the port of the first protection device maintenance 1 is connected with the maintenance state signal port of the first set of main protection device and used for acquiring the maintenance state signal of the first set of main protection device.

Preferably, the power supply module is electrically connected with the DI open-in module, the DO open-out module, the HMI interface processing and communication module, the CPU module and the SIG signal module through the power supply bus, and the CPU module, the HMI interface processing and communication module, the SIG signal module, the DI open-in module and the DO open-out module are all installed on the motherboard.

Preferably, the system comprises an I/O control bus, the I/O control bus is installed on a motherboard, and the CPU module is connected with the DI open-in module, the DO open-out module and the SIG signal module through the I/O control bus.

Preferably, the communication bus is included, the communication bus is installed on a motherboard, and the HMI interface processing and communication module is connected with the CPU module through the communication bus.

Preferably, the system comprises an HMI communication line and a panel module, wherein the HMI communication line is installed on a motherboard, and the panel module is connected with the HMI interface processing and communication module through the HMI communication line.

Preferably, the system comprises a rear chassis, wherein a motherboard, a CPU module, an HMI interface processing and communication module, a SIG signal module, a DI open module, a DO open module and a panel module are arranged in the rear chassis.

Preferably, the CPU module, the HMI interface processing and communication module, the SIG signal module, the DI input module, the DO output module and the power supply module are all rear plug-in modules.

Preferably, the CPU module adopts a dual CPU calculation mode.

Preferably, the DI open module employs an open redundant acquisition approach.

The utility model discloses the beneficial effect who reaches:

the device provides a two-out-of-three device for alternating current protection, and double configuration is realized; each set of three-to-two alternating current protection device receives a tripping signal, a device alarm signal, a device power failure signal and a device maintenance signal from three sets of protection at the same interval, and outputs the tripping signal to the circuit breaker operation box after being judged by the three-to-two alternating current protection device, so that at least two sets of protection actions are judged to be protection effective actions to trip at an outlet, and the reliability of the protection actions is improved; the device can be provided with a protection full fault exit function and a protection loss alarm function, realizes automatic judgment of the abnormality of the logic device, and finally can realize digital transformation and accelerate the realization of the aims of intelligent, safe, reliable, green and efficient digital power transformation.

Drawings

FIG. 1 is a communication schematic of the present apparatus;

FIG. 2 is a two out of three logic diagram of the present apparatus;

FIG. 3 is a block diagram of a rear insertion chassis;

FIG. 4 is a port schematic of the DO port module and the SIG signal module;

fig. 5 is a port schematic of a DI access module;

FIG. 6 is a logic diagram for protecting full fault exit functionality;

FIG. 7 is a logic diagram of a protection loss alarm function.

Detailed Description

The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

A three-out-of-two device for alternating current protection is used for configuring three sets of main protection for ultra-high voltage and ultra-high voltage transmission lines of heavy loads and backbone networks, and realizes an outlet trip scheme of three-out-of-two logic. As shown in fig. 3, the height of the chassis is 4U, the chassis has structural dimensions of 177.0mm × 482.6mm × 291.0mm, and a DI open-in module, a DO open-out module, an HMI interface processing and communication module, a CPU module, and a SIG signal module are installed in the chassis, all of which are connected to a motherboard, and a panel module is installed at the front of the chassis and connected to the motherboard.

As shown in fig. 1, a three-in-two device for ac protection includes a CPU module, an HMI interface processing and communication module, a SIG signal module, a DI input module, and a DO output module, where the HMI interface processing and communication module, the DI input module, the DO output module, and the SIG signal module are all communicatively connected to the CPU module, the DO output module is connected to a switch 1 and a switch 2, a main protection device includes a first set of main protection device, a second set of main protection device, and a third set of main protection device, and the first set of main protection device, the second set of main protection device, and the third set of main protection device are connected to the DI input module.

The motherboard is provided with a power bus, an I/O control bus, a communication bus and an HMI communication line, and the power module is electrically connected with the DI opening module, the DO opening module, the HMI interface processing and communication module, the CPU module and the SIG signal module through the power bus; the CPU module is connected with the DI open-in module, the DO open-out module and the SIG signal module through the I/O control bus; the HMI interface processing and communication module is connected with the CPU module through the communication bus, the panel module is connected with the HMI interface processing and communication module through the HMI communication line, and the power supply module, the DI opening module, the DO opening module, the HMI interface processing and communication module, the CPU module and the SIG signal module are all connected on the motherboard.

The DI opening module is used for acquiring an acquisition instruction output by the CPU module, acquiring external opening signals including trip signals, device alarm signals, device power failure signals and device maintenance signals of three sets of main protection devices in the same interval, and transmitting the external opening signals to the CPU module at a high speed through an I/O control bus;

and the DO output module is used for receiving the instruction of the CPU module and outputting switching value for controlling a tripping outlet. The DO switch-out module has 2 DO modules in total, and provides a switch 1 trip signal (a phase of a trip switch, a phase of a trip switch B, a phase of a trip switch C and a permanent trip) and a switch 2 trip signal (a phase of the trip switch A, a phase of the trip switch B, a phase of the trip switch C and the permanent trip); as shown in FIG. 4, the DO evolution module comprises a NO.5-DO module and a NO.6-DO module,

the NO.5-DO module comprises a TJA1 port, a TJB1 port, a TJC1 port, a TJA2 port, a TJB2 port, a TJC2 port, a TJA3 port, a TJB3 port, a TJC3 port, a TJC1 port, a TJA2 port, a TJA wave recording port, a TJB wave recording port and a TJC wave recording port, wherein the TJA1 port, the TJB1 port, the TJC1 port and the TJC1 port are connected to a first set of trip coils of the switch 1, and the TJA2 port, the TJB2 port, the TJC2 port and the TJC2 port are connected to a second set of trip coils of the switch 1, and are used for outputting a switch 1 trip outlet signal to the switch 1 to control the first set of trip coils of the switch 1 and the second set of trip coils of the switch 1.

The No.6-DO module comprises a TJA1 port, a TJB1 port, a TJC1 port, a TJA2 port, a TJB2 port, a TJC2 port, a TJA3 port, a TJB3 port, a TJC3 port, a never jump 1 port, a never jump 2 port, a TJA alarm port, a TJB alarm port, and a TJC alarm port, wherein the TJA1 port, the TJB1 port, the TJC1 port, and the never jump 1 port are connected to a first set of trip coils of the switch 2, and the TJA ja2 port, the TJB2 port, the jc2 port, and the never jump 2 port are connected to a second set of trip coils of the switch 2, for outputting a switch 2 trip outlet signal to the switch 2, controlling the first set of trip coils of the switch 2 and the second set of trip coils of the switch 2 to trip.

The HMI interface processing and communication module is used for human-computer interface management and communication functions, such as HMI communication with the panel module;

the panel module is used for displaying the states of the three sets of main protection devices, such as a normal state or a protection action state, and is also used for communicating with a PC through a network cable and transmitting related data, such as the states of the three sets of main protection devices, a three-out-of-two device operation state signal or a CPU module logic judgment signal.

The CPU module adopts a double-CPU calculation mode of starting from the CPU module and acting with the main CPU module, is used for receiving an external opening signal acquired by the DI opening module and then carrying out logic judgment, then drives the DO opening module to output a tripping outlet relay to act, carries out two-out-of-three logic judgment during normal operation, and drives the tripping outlet relay so that the two-out-of-three device acts more reliably; when receiving an abnormal signal or a maintenance signal of a set of main protection device, performing logical judgment of 'two to one'; the main protection device which realizes at least one set of normal operation acts to judge as a protection effective action to trip at an outlet; when receiving the abnormal signals or the maintenance signals of the two sets of main protection devices, one-to-one logic judgment is carried out, and the effect that the action of one set of normally running main protection device is judged to be the effective protection action and the outlet is tripped is realized.

In the embodiment, the model of the adopted CPU module is E02-CPU.H-Q-01 (2-path SFP hundred mega optical port, 1-path hundred mega electric debugging port, 48-path analog quantity sampling (270Hz),6 TE).

Specifically, the DI open-in module is used for collecting an external open-in signal and transmitting the external open-in signal to the CPU module; when the trip signal of the adopted external protection device is generated, the trip signal of the external protection device simultaneously comprises an opening signal of a device alarm signal, a device power-off signal and a device maintenance signal, and the opening signal is converted into digital signals through opening optical coupling and respectively enters the CPU module. By collecting the opening signals, the CPU module carries out starting judgment and controls the positive power supply of the opening outlet; and the main CPU module performs two-out-of-three logic judgment and drives the DO module outlet to trip, and completes event recording, HMI interface processing and communication of the communication module.

Furthermore, the CPU module receives the input quantity collected by the DI input module, wherein the input quantity is a jumper switch A phase, a jumper switch B phase, a jumper switch C phase, a permanent trip, a setting alarm signal, a device power-off signal, a device maintenance signal and a three-out-of-two function pressing plate and is used for protection logic judgment. When the main protection devices work normally, at least two of the first set of main protection device, the second set of main protection device and the third set of main protection device send out protection tripping so as to finally execute a tripping signal output by the CPU module. When one of the first set of main protection device, the second set of main protection device and the third set of main protection device is abnormal, the device is powered off or the device is overhauled and quits running, the CPU module adopts a 'one out of two' protection logic; when two of the first set of main protection device, the second set of main protection device and the third set of main protection device quit operation due to device abnormity, device power failure or device maintenance, the CPU module adopts one-to-one protection logic.

Further, when receiving a trip signal of an external main protection device, the CPU module receives a device alarm signal of the main protection device, a device power-off signal of the main protection device and a device maintenance signal of the main protection device at the same time, and judges whether the protection device normally operates or not; if the main protection device is in a device abnormal state or a maintenance state, the three-out-of-two device of the alternating current protection needs to enter a corresponding abnormal logic processing program.

Further, the exception logic processing program is an exception logic processing program which is entered after the alternating current protection two-out-of-three device receives an exception or maintenance signal of the main protection device; if only one of the main protection devices is abnormal, the two-out-of-three device of the alternating current protection works in a logic state of one-out-of-two; if two work abnormalities exist in the main protection device, the two-out-of-three device of the alternating current protection works in a logic state of one-out-of-one.

In the embodiment, under the logic states of two-out-of-three, one-out-of-two and one-out-of-one, the DO output module outputs a tripping outlet contact for driving the circuit breaker to trip after the protection logic is met.

Furthermore, the DI open module adopts an open redundant acquisition mode, so that the open reading reliability of the device is improved, and the influence of single open light coupling damage on the device is avoided. The device comprises 3 DI opening modules NO.8-DI, NO.9-DI and NO.10-DI, and is used for collecting input signals of a two-out-of-three device, including a jump switch A phase, a jump switch B phase, a jump switch C phase, a permanent jump, a device alarm signal, a device power-off signal, a device maintenance signal, a two-out-of-three function pressing plate, and opening functions of resetting, printing, maintenance and the like.

Specifically, the No.8-DI includes a protection three-hop a-in 1 port, a protection three-hop a-in 2 port, a protection three-hop B-in 1 port, a protection three-hop B-in 2 port, a protection three-hop C-in 1 port, a protection three-hop C-in 2 port, a protection three-permanent-hop-in 1 port, a protection three-permanent-hop-in 2 port, a protection three-device alarm 1 port, a protection three-device alarm 2 port, a protection three-device overhaul 1 port, a protection three-device overhaul 2 port, a plurality of standby ports, a three-out-of-two function input port, and a full-fault trip input port. The protection three-hop A-in port 1, the protection three-hop B-in port 1, the protection three-hop C-in port 1 and the protection three-hop C-in port 1 are used for being connected with an action signal port of a third set of main protection device and used for obtaining an action signal of the third set of main protection device;

the alarm 1 port of the protection three-device is connected with the alarm signal port of the third set of main protection device and is used for acquiring the alarm signal of the third set of main protection device; and the port of the maintenance 1 of the protection three-set main protection device is connected with a maintenance state signal port of the third set of main protection device and used for acquiring a maintenance state signal of the third set of main protection device and judging the running state of the main protection device.

The NO.9-DI includes a protection two-hop A-in 1 port, a protection two-hop A-in 2 port, a protection two-hop B-in 1 port, a protection two-hop B-in 2 port, a protection two-hop C-in 1 port, a protection two-hop C-in 2 port, a protection two-hop B-in 1 port, a protection two-hop B-in 2 port, a protection two-device alarm 1 port, a protection two-device alarm 2 port, a protection two-device overhaul 1 port, a protection two-device overhaul 2 port and a plurality of standby ports. The protection two-hop A-in port 1, the protection two-hop B-in port 1, the protection two-hop C-in port 1 and the protection two-hop permanent-in port 1 are used for judging the running state of the main protection device.

The No.10-DI includes protecting a one-hop-a-break-in 1 port, protecting a one-hop-a-break-in 2 port, protecting a one-hop-B-break-in 1 port, protecting a one-hop-B-break-in 2 port, protecting a one-hop-C-break-in 1 port, protecting a one-hop-C-break-in 2 port, protecting a one-hop-in 2 port, protecting a one-device-alarm 1 port, protecting a one-device-alarm 2 port, protecting a one-device-maintenance 1 port, protecting a one-device-maintenance 2 port, and a plurality of backup ports. The protection one-hop A-to-1 port, the protection one-hop B-to-1 port, the protection one-hop C-to-1 port and the protection one-hop-to-1 port are used for being connected with action signal ports of a first set of main protection devices and obtaining action signals of the first set of main protection devices;

the port of the protection device alarm 1 is connected with the alarm signal port of the first set of main protection device and is used for acquiring the alarm signal of the first set of main protection device;

the port of the first protection device maintenance 1 is connected with the maintenance state signal port of the first set of main protection device and used for acquiring the maintenance state signal of the first set of main protection device and judging the running state of the main protection device.

The SIG signal module is used for receiving a CPU instruction, outputting semaphore and monitoring background signals. The SIG signal module comprises a port for transmitting an abnormal state of a device, a port for transmitting a protection action keeping S1 state, a port for transmitting a protection operation exception-S2, a port for transmitting an abnormal state of a device, a port for transmitting a protection action-S3-1 state, a port for transmitting a protection operation exception-S4, a port for protecting an action-S3-2, a port for protecting a device alarm-S5, a port for a standby-Trip 23 and a port for standby-Trip 24. The device abnormal port is used for outputting a signal when the two-out-of-three device self-detects that a hardware fault exists; the protection action port is used for outputting a signal when the two-out-of-three device carries out protection logic judgment on a tripping outlet; the protection operation abnormity is used for outputting a signal when the two-out-of-three device performs self-detection and has alarm information; the protection device alarm is used for outputting the state judgment result of the three sets of main protection devices.

The power supply plug-in is used for supplying power to the CPU module, the HMI interface processing and communication module, the DI input module, the SIG signal module and the DO output module through a power supply bus.

The power module comprises a switch key, a 220V power supply port, a 24V power supply port and a 5V power supply port, the CPU module, the HMI interface processing and communication module, the SIG signal module, the DI input module, the DO output module, the power module and the panel module can adopt various models in the prior art, and the skilled person can select the appropriate model according to actual requirements, and the embodiment is not illustrated.

As shown in fig. 2, the two-out-of-three device receives a signal of the main protection device, is used for performing two-out-of-three logic determination when the main protection device is normal, and is used for "one-out-of-two" logic determination and "one-out-of-one" logic determination when the main protection device is abnormal.

The first set of main protection device is normal and the first set of main protection device acts and judges to obtain a first result;

the second set of main protection device is normal and the second set of main protection device acts and judges to obtain a second result;

the third set of main protection device is normal and the third set of main protection device acts and judges to obtain a third result;

after the first set of main protection device is normal, the second set of main protection device is normal and the third set of main protection device is normal, judging whether the result is more than or equal to 1 (or not) to obtain a fourth result; after the main protection device is normal, negation is taken to indicate that the main protection device is abnormal;

carrying out AND judgment on the result I and the result II to obtain a result V;

carrying out AND judgment on the result I and the result III to obtain a result six;

carrying out AND judgment on the result II and the result III to obtain a result III;

judging whether the result I, the result II and the result III are greater than or equal to 1 to obtain a result eight;

judging whether the result IV and the result IV are equal to or larger than 1 to obtain a result IV, and outputting a logic judgment result belonging to 'one-out-of-two' and a logic judgment result belonging to 'one-out-of-one';

and judging whether the result is greater than or equal to 1 by the result five, the result six and the result seven, and outputting a logic judgment result of taking two out of three.

And judging whether the result is greater than or equal to 1 by the result five, the result six, the result seven and the result nine, and outputting the action of the device for taking two out of three.

The normal state of the main protection device means that a lamp is lighted when the main protection device normally operates, no hardware fault exists, and the main protection device is in a non-maintenance state.

The abnormity of the main protection device means that the main protection device is powered off, has hardware faults or is in a maintenance state.

The first set of main protection device is normal, namely the first set of main protection device is in a normal operation state without hardware fault and in a non-maintenance state.

The second set of main protection device is normal, namely the second set of main protection device is in a normal operation lamp lighting state without hardware fault and in a non-overhaul state.

The third set of main protection device is normal, namely the third set of main protection device is in a normal operation state, namely a lamp is lightened, and no hardware fault exists.

The device collects at least two sets of protection actions, and judges that the protection action is effective to trip at the outlet, thereby improving the reliability of the protection action; in addition, the device can be provided with a protection full fault exit function and a protection missing alarm function, and the automatic judgment of the logic device abnormity is realized.

As shown in fig. 6, in the logic determining process for protecting the full fault exit function, the two-out-of-three device receives the fault signal of the main protection device, and is used to protect the logic of the full fault exit function when the main protection device fails.

Performing and judging on the faults of the first set of main protection device, the second set of main protection device and the third set of main protection device to obtain a ten-result, and outputting a full fault alarm; and performing and judging on the result ten and the full fault tripping function input, and outputting a full fault tripping outlet.

The main protection device failure means that the main protection device is powered off or a hardware failure exists.

As shown in fig. 7, the two-out-of-three device receives the maintenance status signal of the main protection device, and is used for protecting the missing alarm function logic when the main protection device is maintained.

And the first set of main protection device overhaul, the second set of main protection device overhaul and the third set of main protection device overhaul are carried out and judged, and protection missing alarm is output.

The main protection device is maintained in a maintenance state.

The device provides a two-out-of-three device for alternating current protection, and double configuration is realized; each set of three-to-two alternating current protection device receives a tripping signal, a device alarm signal, a device power failure signal and a device maintenance signal from three sets of protection at the same interval, and outputs the tripping signal to the circuit breaker operation box after being judged by the three-to-two alternating current protection device, so that at least two sets of protection actions are judged to be protection effective actions to trip at an outlet, and the reliability of the protection actions is improved; in addition, the device can be provided with a protection full fault exit function and a protection loss alarm function, so that the automatic judgment of the abnormality of the logic device is realized, and the aims of digital transformation and construction of intelligent, safe, reliable, green and efficient digital power transformation can be realized.

The device has the following advantages:

1) the utility model provides a two devices are got to three of interchange protection adds three before the tripping operation return circuit of circuit breaker and gets two judgement logics, just judges to protect effective action to go out the tripping operation promptly two sets of protection actions, improves the reliability of protection action.

2) The utility model discloses a drive into redundant collection mode, effectively avoid single the influence of opening the optical coupling damage to the device.

3) The utility model provides a two devices are got to three and set up the start-up and differentiate, only start from CPU, and two logical exports are got to main CPU's three simultaneously, and the device just can reliably move. The start logic is determined by a logic sequence combination of the external trip from the CPU.

4) The utility model provides a two devices are got to three discerns and handles protection device unusual and maintenance state, if protection device is in the device unusual or maintenance state, then exchange the three of protection and get two devices and need get into corresponding unusual logic processing procedure.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims (10)

1. A three-in-two device for alternating current protection is characterized by comprising a CPU module, an HMI (human machine interface) processing and communication module, an SIG (Signal Generator) module, a DI (direct input) module and a DO (data output) module, wherein the HMI processing and communication module, the DI module, the DO module and the SIG module are all in communication connection with the CPU module, the DO module is connected with a switch 1 and a switch 2, and a first set of main protection device, a second set of main protection device and a third set of main protection device are connected with the DI module.

2. An AC protected two-out-of-three device according to claim 1,

the DO switch-out module comprises a TJA1 port, a TJB1 port, a TJC1 port, a TJA2 port, a TJB2 port, a TJC2 port, a permanent jump 1 port and a permanent jump 2 port, a TJA1 port, a TJB1 port, a TJC1 port and a permanent jump 1 port are connected to a first group of trip coils of the switch 1, and a TJA2 port, a TJB2 port, a TJC2 port and a permanent jump 2 port are connected to a second group of trip coils of the switch 1, and are used for outputting a switch 1 trip outlet signal to the switch 1 and controlling the first group of trip coils of the switch 1 and the second group of trip coils of the switch 1.

3. An AC protected two-out-of-three device according to claim 1,

the DO outgoing module further comprises a TJA1 port, a TJB1 port, a TJC1 port, a skip 1 port, a TJA2 port, a TJB2 port, a TJC2 port, and a skip 2 port, wherein the TJA1 port, the TJB1 port, the TJC1 port, and the skip 1 port are connected to a first set of trip coils of the switch 2, and the TJA2 port, the TJB2 port, the TJC2 port, and the skip 2 port are connected to a second set of trip coils of the switch 2, and are configured to output a switch 2 trip outlet signal to the switch 2, and control the first set of trip coils of the switch 2 and the second set of trip coils of the switch 2.

4. An AC protected two-out-of-three device according to claim 1,

the DI switching module comprises a protection three-hop A switching-in 1 port, a protection three-hop B switching-in 1 port, a protection three-hop C switching-in 1 port, a protection three-device alarm 1 port and a protection three-device maintenance 1 port, wherein the protection three-hop A switching-in 1 port, the protection three-hop B switching-in 1 port, the protection three-hop C switching-in 1 port and the protection three-hop C switching-in 1 port are connected with action signal ports of a third set of main protection devices and are used for acquiring action signals of the third set of main protection devices;

the alarm 1 port of the protection three-device is connected with the alarm signal port of the third set of main protection device and is used for acquiring the alarm signal of the third set of main protection device;

and the port of the maintenance 1 of the protection three devices is connected with the maintenance state signal port of the third set of main protection device and is used for acquiring the maintenance state signal of the third set of main protection device.

5. An AC protected two-out-of-three device according to claim 1,

the DI switching module comprises a protection second-hop A switching-in 1 port, a protection second-hop B switching-in 1 port, a protection second-hop C switching-in 1 port, a protection second-hop permanent switching-in 1 port, a protection second-device alarm 1 port and a protection second-device maintenance 1 port, wherein the protection second-hop A switching-in 1 port, the protection second-hop B switching-in 1 port, the protection second-hop C switching-in 1 port and the protection second-permanent switching-in 1 port are connected with action signal ports of a second set of main protection devices and used for acquiring action signals of the second set of main protection devices;

the alarm 1 port of the protection second device is connected with the alarm signal port of the second set of main protection device and is used for acquiring the alarm signal of the second set of main protection device;

the port of the second protection device maintenance 1 is connected with the maintenance state signal port of the second set of main protection device and is used for acquiring the maintenance state signal of the second set of main protection device.

6. An AC protected two-out-of-three device according to claim 1,

the DI switching module includes a protection one-hop A switching-in 1 port, a protection one-hop B switching-in 1 port, a protection one-hop C switching-in 1 port, a protection one-hop permanent switching-in 1 port, a protection one-device alarm 1 port and a protection one-device maintenance 1 port,

protecting a first-hop-A-switch-in-1 port, protecting a first-hop-B-switch-in-1 port, protecting a first-hop-C-switch-in-1 port and protecting a permanent-hop-switch-in-1 port, wherein the first-hop-A-switch-in-1 port is connected with an action signal port of a first set of main protection devices and is used for acquiring action signals of the first set of main protection devices;

the port of the protection device alarm 1 is connected with the alarm signal port of the first set of main protection device and is used for acquiring the alarm signal of the first set of main protection device;

the port of the first protection device maintenance 1 is connected with the maintenance state signal port of the first set of main protection device and used for acquiring the maintenance state signal of the first set of main protection device.

7. An AC protected two-out-of-three device according to claim 1,

the intelligent power supply system comprises a power supply module, a motherboard and a power supply bus, wherein the motherboard is provided with the power supply bus, the power supply module is electrically connected with a DI (direct interface) opening module, a DO (DO) opening module, an HMI (human machine interface) processing and communication module, a CPU (central processing unit) module and an SIG (signal SIG) signal module through the power supply bus, and the CPU module, the HMI processing and communication module, the SIG signal module, the DI opening module and the DO opening module are all arranged on the motherboard.

8. An AC protected two-out-of-three device according to claim 3,

the system comprises an I/O control bus and a communication bus, wherein the I/O control bus is installed on a motherboard, and a CPU module is connected with a DI open-in module, a DO open-out module and a SIG signal module through the I/O control bus;

the motherboard is provided with a communication bus, and the HMI interface processing and communication module is connected with the CPU module through the communication bus.

9. An AC protected two-out-of-three device according to claim 3,

the system comprises an HMI communication line and a panel module, wherein the HMI communication line is installed on a motherboard, and the panel module is connected with the HMI interface processing and communication module through the HMI communication line.

10. An AC protected two-out-of-three device according to claim 3,

the CPU module, the HMI interface processing and communication module, the SIG signal module, the DI input module, the DO output module and the power supply module all adopt backward insertion modules;

the CPU module adopts a double-CPU calculation mode, and the DI opening module adopts an opening redundancy acquisition mode.

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