CN201365140Y - Feeder line switch control module for nuclear power station electric power plant - Google Patents

Abstract

The utility model relates to a feeder switch control module of a nuclear power plant, which is characterized in that: an input instruction processing logic unit (1), a failure processing logic unit (2), a state processing logic unit (3), an output instruction generation logic unit (4) and The feeder switchgear is composed of three input terminals of the input instruction processing logic unit (1), which are respectively connected to the fault signal (1-1), the blocking signal (1-2) of the feeder switchgear and the human-machine interface signal of the operator station (1- 3), its two output terminals are respectively connected to an input terminal of the fault processing logic unit (2) and the output instruction generation logic unit (4); the two input terminals of the fault processing logic unit (2) are respectively connected to the state processing logic unit ( 3) and an output terminal of the output command generation logic unit (4); an output terminal of the output command generation logic unit (4) is connected to the control command signal terminal (4-1) of the feeder switch cabinet. The utility model adopts the decentralized control system DCS unified with the unit to realize the control of the 6.6kV feeder switch and the unit control system to share the operator station and overall monitoring, which has the effect of improving the reliability of the unit operation.

Description

Nuclear power plant feeder switch control module

technical field

The utility model relates to a power feeder switch control module of a nuclear power plant, which is suitable for the control module of the feeder switch equipment in the power consumption system, in particular suitable for the control of the power supply feeder switch of the 6.6kV power plant power system of the nuclear power plant. Belongs to the field of electrical equipment technology

Background technique

In nuclear power plants, the reliability of 6.6kV feeder switch control is crucial to the safe operation of 6.6kV power plant power system, 380V plant power system and nuclear power plant units, and is even more related to the safe operation of the nuclear island. The switch control of the 6.6kV transformer in the existing technology is completed by the relay control device installed in the switch cabinet, including intermediate relays, protective current relays and voltage relays, as well as transfer intermediate relays installed in the relay rack, installed in the control room Control switches, measuring instruments and connecting cables are used to realize switch control, interlocking, measurement and monitoring and alarming. There are defects such as complex wiring, poor reliability, difficult maintenance, low efficiency, and more maintenance personnel invested, which increases its operating costs.

Utility model content

The purpose of this utility model is to provide a nuclear power plant feeder to solve the defects of poor reliability, difficult maintenance, low efficiency, many maintenance personnel invested and high operating cost in the circuit controlled by the 6.6kV feeder switch of the prior art. switch control module.

The purpose of this utility model can be achieved by taking the following technical solutions:

The power plant feeder switch control module of nuclear power plant has the following structural features: it is composed of input command processing logic unit, fault processing logic unit, state processing logic unit, output command generation logic unit and feeder switch cabinet; the three input terminals of input command processing logic unit Connect the fault signal, blocking signal and operator station man-machine interface signal of the feeder switch cabinet respectively, and its two output terminals are respectively connected to an input terminal of the fault processing logic unit and an output command generation logic unit; two inputs of the fault processing logic unit The terminal is respectively connected to an output terminal of the state processing logic unit and the output instruction generation logic unit, and its two output terminals are respectively connected to an input terminal of the output instruction generation logic unit and the alarm terminal of the man-machine interface; the input terminal of the state processing logic unit is connected to the feeder One output end of the switch position status feedback signal is connected to the man-machine interface display end; one output end of the output command generation logic unit is connected to the control command signal end of the feeder switch cabinet.

The purpose of this utility model can also be achieved by taking the following technical solutions:

A kind of implementation scheme of the present utility model is: the input command processing logic unit is formed by connecting with gate chip IC1～IC3, or gate chip I1; The failure processing logic unit is formed by AND gate chip IC4～IC5, or gate chip I2, R/ S flip-flops Q1~Q2 and delayer chips T1~T2 are connected; the state processing logic unit is connected by AND gate chips IC6~IC7 and OR gate chips I3~I4; the output command generation logic unit is made by AND gate chip IC8 , OR gate chip I5; the fault signal of the feeder switch cabinet is respectively connected to an input end of the AND gate chip IC1 and an input end of the OR gate chip I1, the output end of IC1 is connected to an input end of I5, and the output end of I1 is respectively Connect one input terminal of I5, one input terminal of IC8 and one input terminal of I2, respectively connect the blocking signal to one input terminal of IC3, IC4, IC5 and IC8, and connect the man-machine interface signal of the operator station to IC2, IC3 and IC8 respectively One input terminal; several feeder switch position status feedback signals are respectively connected to the input terminals of I3, I4 and IC6, IC7; the output terminals of I5 and IC8 are connected to the control command signal terminal of the feeder switch cabinet; the output terminals of Q1, Q2 and I2 are connected to human The alarm terminal of the machine interface; the output terminals of IC6 and I4 are connected to the display terminal of the man-machine interface.

An embodiment of the present invention is: the fault signal of the feeder switchgear may include the feeder overload protection action signal, the feeder 6KV high-voltage fuse tripping signal, the feeder 6KV cable zero-sequence protection action signal, and the signal of the trip connection piece; The blocking signal may include opening the OPEN signal and closing the CLOSE signal; the operator station man-machine interface signal may include the signal of the remote/local control switch at the remote position and the selection of the DCS control signal.

A kind of embodiment of the present invention is: feeder switch position state feedback signal can comprise feeder 6KV switch closing signal, feeder 6KV switch in working position signal, feeder 6KV switch test switch in test position signal, feeder 6KV switch opening signal , Feeder 6KV switch in test position signal, feeder 6KV switch test switch in normal position signal.

An embodiment of the utility model is that: the feeder switch cabinet control instruction signal terminal includes a trip signal and a switch signal.

The beneficial effects of the utility model are:

1. This utility model is especially suitable for 6.6kV feeder switch control. It adopts the decentralized control system DCS unified with the unit to realize the control of the 6.6kV feeder switch and the unit control system to share the operator station and overall monitoring, which has the advantages of improving the reliability of the unit operation. Effect.

2. Since the utility model adopts the decentralized control system DCS unified with the unit, it can greatly improve the automation level of the unit, reduce the setting of operation and maintenance personnel, and achieve the purpose of reducing personnel and increasing efficiency, so it has the effect of reducing use and maintenance costs.

Description of drawings

Fig. 1 is a logical block diagram of the utility model.

Fig. 2 is a schematic circuit diagram of a specific embodiment of the present invention.

Fig. 3 is the work flowchart of the utility model.

Detailed ways

Referring to Fig. 1, the present embodiment is made up of input command processing logic unit 1, fault processing logic unit 2, state processing logic unit 3, output command generation logic unit 4 and feeder switch cabinet; The input terminals are respectively connected to the fault signal 1-1, the blocking signal 1-2 and the man-machine interface signal 1-3 of the operator station of the feeder switch cabinet, and its two output terminals are respectively connected to the fault processing logic unit 2 and the output command generation logic unit 4 An input terminal of the fault processing logic unit 2 is respectively connected to an output terminal of the state processing logic unit 3 and an output command generation logic unit 4, and its two output terminals are respectively connected to an input of the output command generation logic unit 4 terminal and the man-machine interface alarm terminal 2-1; the input terminal of the state processing logic unit 3 is connected to the feeder switch position state feedback signal 3-1, and an output terminal is connected to the man-machine interface display terminal 3-2; the output command generation logic unit One output terminal of 4 is connected to the control command signal terminal 4-1 of the feeder switch cabinet.

Referring to Fig. 2, input instruction processing logic unit 1 is formed by connecting AND gate chips IC1~IC3, or gate chip I1; fault processing logic unit 2 is composed of AND gate chips IC4~IC5, OR gate chip I2, R/S flip-flop Q1 ～Q2 and delayer chips T1～T2 are connected; the state processing logic unit 3 is formed by connecting the AND gate chips IC6～IC7 and the OR gate chips I3～I4; the output command generation logic unit 4 is formed by the AND gate chip IC8, or The gate chip I5 is connected; the fault signal 1-1 of the feeder switch cabinet is respectively connected to an input terminal of the AND gate chip IC1 and an input terminal of the OR gate chip I1, the output terminal of IC1 is connected to an input terminal of I5, and the output terminal of I1 Connect one input terminal of I5, one input terminal of IC8 and one input terminal of I2 respectively, block signal 1-2 respectively connect one input terminal of IC3, IC4, IC5 and IC8, operator station man-machine interface signal 1-3 respectively Connect to one input terminal of IC2, IC3 and IC8; several feeder switch position status feedback signals 3-1 are respectively connected to the input terminals of I3, I4, IC6 and IC7; the output terminals of I5 and IC8 are connected to feeder switch cabinet control command signal terminal 4 -1; the output terminals of Q1, Q2 and I2 are connected to the man-machine interface alarm terminal 2-1; the output terminals of IC6 and I4 are connected to the man-machine interface display terminal 3-2.

The fault signal 1-1 of the feeder switchgear can include the feeder overload protection action signal 1-1-1, the feeder 6KV high-voltage fuse tripping signal 1-1-2, and the feeder 6KV cable zero-sequence protection action signal 1-1-3 , The signal 1-1-4 of the trip connection piece; the blocking signal 1-2 can include opening the OPEN signal 1-2-1, closing the CLOSE signal 1-2-2; the operator station man-machine interface signal 1-3 can include The remote/local control switch is at the remote position signal 1-3-1, and selects the DCS control signal 1-3-2. The feeder switch position status feedback signal 3-1 may include feeder 6KV switch closing signal 3-1-1, feeder 6KV switch in working position signal 3-1-2, feeder 6KV switch test switch in test position signal 3-1- 3. Signal 3-1-4 for feeder 6KV switch opening, signal 3-1-5 for feeder 6KV switch in test position, signal 3-1-6 for test switch in feeder 6KV switch in normal position. The control command signal terminal 4-1 of the feeder switch cabinet includes a tripping signal 4-1-1 and a closing signal 4-1-2.

With reference to Fig. 3, the concrete control process of the present utility model is as follows:

1) Input commands from the DCS man-machine interface;

2) Judge the feasibility of the logic by the logic processing element;

3) Feasible command generation logic output to the circuit breaker control loop of the feeder switch cabinet;

4) Not feasible, the fault signal is output by the alarm, and sent to the man-machine interface through the fault processing logic element for alarm, reset or handle the fault;

5) The circuit breaker position status feedback signal is input to the man-machine interface through the DCS signal input route port.

Referring to Figure 1 and Figure 2, the control and monitoring of the feeder is realized by the operator at the operator station of the DCS, including the remote closing and tripping operations of the 6.6kV circuit breaker at the operator station of the DCS, and the installation on the switch The microcomputer integrated protection device in the cabinet detects the fault of the electrical circuit and acts to make the switch trip and its position status feedback signal, the alarm signal of the mechanical failure in the switch cabinet, the electrical measurement signal obtained through the transformer installed in the switch cabinet, etc. , these signals are sent to the control module of DCS through the cable, and the control module performs logic processing according to the operation requirements, and then sends out the trip/closing command and gives the corresponding normal signal and alarm signal.

In this embodiment, the signal input line port of the man-machine interface is connected to the output line port of the fault processing logic unit 2 . The signal line input port of the fault processing logic unit 2 is connected to the signal output line ports of the state processing logic unit 3 , the input command processing logic unit 1 and the output command generation logic unit 4 . The signal input line ports of the input command processing logic unit 1 and the state processing logic unit 3 are connected to the control signal output line ports of the field device.

The function of the input instruction logic processing unit 1 is to receive external signals, detect the input signals and judge its logical feasibility, provide corresponding processing results for output instructions and fault processing components, and connect to the output together with the operation instructions of the DCS operation interface port. Its signal input port is connected to the feeder switch cabinet and other equipment related to feeder switch control interlock or alarm signal.

The function of the output instruction generating logic unit 4 is to output the result of judging the logical feasibility of the input instruction logic processing element to the feeder circuit breaker control loop.

The function of the state processing logic unit 3 is to receive the position state of the feeder circuit breaker for processing and send it to the man-machine interface and the fault processing logic element.

The function of the fault processing logic unit 2 is to process the logic error signal judged by the input instruction logic processing element with other fault signals and output it to the man-machine interface for alarm, reset or other processing.

The feeder switch is an operating circuit breaker for the feeder power supply, installed in the switch cabinet, connected to the 6.6kV bus, and provides power for the feeder.

In addition to being applicable to the switch control of the low-voltage plant feeder of the nuclear power plant described in the specific embodiment, the utility model can also be widely used in the switch control of other high and low-voltage feeders. Limitations of kV feeder switch control.

Claims (5)

1, nuclear power station power plant feeder switch control module is characterized in that: become with the feeder switch group by input instruction processing logic unit (1), troubleshooting logical block (2), state processing logical block (3), output order formation logic unit (4); Three inputs of input instruction processing logic unit (1) connect fault-signal (1-1), block signal (1-2) and the operator station man-machine interface signal (1-3) of feeder switch cabinet respectively, and its two outputs connect an input of troubleshooting logical block (2) and output order formation logic unit (4) respectively; Two inputs of troubleshooting logical block (2) are an output of connection status processing logic unit (3) and output order formation logic unit (4) respectively, and its two outputs connect input of output order formation logic unit (4) and man-machine interface respectively and report to the police and hold (2-1); The input of state processing logical block (3) connects feeder switch location status feedback signal (3-1), an output connects man-machine interface display end (3-2); An output of output order formation logic unit (4) connects feeder switch cabinet control command signal end (4-1).

2, nuclear power station according to claim 1 power plant feeder switch control module is characterized in that: input instruction processing logic unit (1) is by being formed by connecting with door chip IC a 1～IC3 or a door chip I 1; Troubleshooting logical block (2) is by being formed by connecting with door chip IC 4～IC5 or door chip I 2, R/S trigger Q1～Q2, delayer chip T1～T2; State processing logical block (3) is by being formed by connecting with door chip IC 6～IC7 or door chip I 3～I4; Output order formation logic unit (4) is by being formed by connecting with door chip IC 8 or door chip I 5; The fault-signal of feeder switch cabinet (1-1) connect respectively with input of door chip IC 1 and or the input of door chip I 1, the output of IC1 connects the input of I5, the output of I1 connects the input of an input, IC8 of I5 and the input of I2 respectively, block signal (1-2) connects the input of IC3, IC4, IC5 and IC8 respectively, and operator station man-machine interface signal (1-3) connects the input of IC2, IC3 and IC8 respectively; Several feeder switch location status feedback signals (3-1) connect the input of I3, I4 and IC6, IC7 respectively; The output of I5 and IC8 is connected feeder switch cabinet control command signal end (4-1); The output of Q1, Q2 and I2 is connected man-machine interface warning end (2-1); The output of IC6 and I4 is connected man-machine interface display end (3-2).

3, nuclear power station according to claim 1 power plant feeder switch control module is characterized in that: the fault-signal of feeder switch cabinet (1-1) comprises feeder line overload protection actuating signal (1-1-1), feeder line 6KV high-tension fuse trip signal (1-1-2), feeder line 6KV cable zero-sequenceprotection actuating signal (1-1-3), tripping operation brace, and this goes out signal (1-1-4); Block signal (1-2) comprises to be opened OPEN signal (1-2-1), closes CLOSE signal (1-2-2); Operator station man-machine interface signal (1-3) comprise the control switch of a distant place/on the spot in the distance position signalling (1-3-1), select DCS control signal (1-3-2).

4, nuclear power station according to claim 1 power plant feeder switch control module is characterized in that: feeder switch location status feedback signal (3-1) comprise feeder line 6KV switch switching signal (3-1-1), feeder line 6KV switch at the test switch of service position signal (3-1-2), feeder line 6KV switch at test position signal (3-1-3), feeder line 6KV switch sub-gate signal (3-1-4), feeder line 6KV switch at the test switch of test position signal (3-1-5), feeder line 6KV switch at normal position signal (3-1-6).

5, nuclear power station according to claim 1 power plant feeder switch control module, it is characterized in that: feeder switch cabinet control command signal end (4-1) comprises trip signal (4-1-1) and switching signal (4-1-2).

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