A system for suppressing electromagnetic interference by optimizing drive control modules in nuclear power plants

Abstract

The present invention relates to a system for suppressing electromagnetic interference of a preferred drive control module of a nuclear power plant, comprising a control system, a preferred drive control device, a suppression module, an electrical switch panel and an execution device; the control system sends a control command or a simulation command; the preferred drive control device performs priority management on the control command or the simulation command and sends a drive control instruction, and receives a feedback signal and transmits it to the control system; the electrical switch panel outputs a drive control signal according to the drive control instruction to drive the execution device, and returns a feedback signal; the suppression module suppresses the electromagnetic interference generated by the electrical switch panel when the control execution device is shut down, so as to prevent the preferred drive control device from overcurrent protection. The present invention suppresses electromagnetic interference through the suppression module, so as to prevent the preferred drive control device from overcurrent protection, ensure the successful opening of the contactor, and ensure the normal shutdown of the execution device.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power plant automatic control, and more specifically, to a system for suppressing electromagnetic interference of a nuclear power plant preferred drive control module. Background Art

[0002] The instrumentation and control system of a nuclear power plant usually consists of two system platforms, non-safety level and safety level. The non-safety level instrumentation and control system is mainly used for the normal operation of the unit and the human-machine interface, while the safety level instrumentation and control system is mainly used for accident mitigation. The AV42 preferred module is a drive control module with priority management function under the TELEPERM XS (TXS) safety level instrumentation and control system platform, which is used in nuclear power plants of multiple reactor types. The AV42 preferred module is mainly used for the drive, control and monitoring of safety-critical actuators, including solenoid valves, motors (pumps, fans), open-loop control actuators (isolation valves, stop valves) and closed-loop control actuators (control valves), etc., which are very important for the safety of nuclear power units.

[0003] At present, when a nuclear power plant performs equipment shutdown operations, the AV42 module sends a remote shutdown command to the electrical switch panel. After the electrical switch panel receives the shutdown command, the remote trip relay is energized and its normally open contact is closed, the trip relay is energized and its normally closed contact is disconnected, the closing relay is de-energized and its normally open contact is disconnected, the contactor holding coil is de-energized, the contactor is tripped, the power supply of the equipment is disconnected, and the equipment is shut down normally. However, the contactor holding coil is an inductive element. During the process of de-energizing the coil, a transient reverse voltage will be generated, and electromagnetic interference will be generated to the feedback signal loop near the contactor holding coil through the distributed capacitance, thereby generating a transient induced current in the feedback signal loop. When the current value is greater than the AV42 module overcurrent protection setting value, the AV42 overcurrent protection is activated, the output signal is cut off, and the contactor tripping is terminated through the action of the relay. When the action time of the relay is faster than the tripping time of the contactor, the tripping of the contactor is coupled with the action of the relay and circulates back and forth, resulting in the failure of the contactor tripping. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a system for suppressing electromagnetic interference of a nuclear power plant's optimal drive control module in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the present invention to solve the technical problem is: constructing a system for suppressing electromagnetic interference by optimizing drive control modules in a nuclear power plant, including: a control system, an optimized drive control device, a suppression module, an electrical switch panel and an execution device;

[0006] The control system is used to send a control command or a simulation command to the preferred drive control device;

[0007] The preferred drive control device is used to perform priority management on the control command or simulation command and send a drive control instruction to the electrical switch panel, and receive a feedback signal output by the electrical switch panel and transmit it to the control system;

[0008] The electrical switch panel is used to output a drive control signal to the execution device according to the drive control instruction to drive the execution device, and return the feedback signal to the preferred drive control device;

[0009] The suppression module is used to suppress the electromagnetic interference generated by the electrical switch panel when controlling the execution device to stop operating, so as to prevent the preferred drive control device from overcurrent protection.

[0010] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant of the present invention, a command transmission channel, a feedback transmission channel and a power supply channel are provided between the preferred drive control device and the electrical switch panel;

[0011] The command transmission channel is used for the preferred drive control device and the electrical switch panel to transmit the drive control command or confirmation signal;

[0012] The feedback transmission channel is used for the electrical switch panel to transmit a feedback signal to the preferred drive control device;

[0013] The power supply channel is used for the preferred drive control device to provide contact power to the electrical switch panel; the suppression module is arranged on the power supply channel.

[0014] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant of the present invention, the drive control instruction includes: a shutdown instruction and / or a start instruction;

[0015] The feedback signal includes any one or more of a shutdown signal, an operation signal, a test position signal, a switch panel fault signal and a low voltage protection signal.

[0016] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant of the present invention, the command transmission channel includes: a shutdown command channel, a startup command channel and a confirmation channel;

[0017] The shutdown command channel is used for the preferred drive control device to transmit the shutdown command to the electrical switch panel; the start command channel is used for the preferred drive control device to transmit the start command to the electrical switch panel; the confirmation channel is used for the electrical switch panel to transmit the confirmation signal to the preferred drive control device;

[0018] The feedback transmission channels include: a shutdown feedback channel, an operation feedback channel, a test position feedback channel, a switch panel fault feedback channel and a low voltage protection feedback channel;

[0019] The shutdown feedback channel is used for the electrical switch panel to feed back the shutdown signal to the preferred drive control device; the operation feedback channel is used for the electrical switch panel to feed back the operation signal to the preferred drive control device; the test position feedback channel is used for the electrical switch panel to feed back the test position signal to the preferred drive control device; the switch panel fault feedback channel is used for the electrical switch panel to feed back the switch panel fault signal to the preferred drive control device; and the low voltage protection feedback channel is used for the electrical switch panel to feed back the low voltage protection signal to the preferred drive control device.

[0020] In the system for suppressing electromagnetic interference by preferably driving a control module in a nuclear power plant according to the present invention, the suppression module comprises: a unidirectional conduction circuit;

[0021] The positive end of the one-way conducting circuit is connected to the preferred drive control device, and the negative end of the one-way conducting circuit is connected to the electrical switch panel.

[0022] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant of the present invention, the unidirectional conduction circuit comprises: an anti-reverse diode;

[0023] The anode of the anti-reverse diode is the positive end of the one-way conducting circuit, and the cathode of the anti-reverse diode is the negative end of the one-way conducting circuit.

[0024] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant according to the present invention, the electrical switch panel comprises: a first switch control circuit and a second switch control circuit;

[0025] The first switch control circuit is used to receive the drive control instruction sent by the preferred drive control device, and control the second switch control circuit according to the drive control instruction; the first switch control circuit is also used to feed back the confirmation signal to the preferred drive control device;

[0026] The second switch control circuit is used to drive the start and stop of the execution device according to the control of the first switch control circuit, and output the feedback signal to the preferred drive control device.

[0027] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant of the present invention, the first switch control circuit comprises: a closing circuit and an opening circuit;

[0028] The closing circuit is used to control the second switch control circuit to perform a closing action according to the drive control instruction output by the preferred drive control device;

[0029] The opening circuit is used to control the second switch control circuit to perform an opening action according to the drive control instruction output by the preferred drive control device.

[0030] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant according to the present invention, the closing circuit comprises: a remote closing relay and a first closing relay;

[0031] The remote closing relay is connected to the start command channel and the first closing relay respectively;

[0032] The remote closing relay is used to receive the start instruction transmitted by the start instruction channel, and control the first closing relay to perform a closing action according to the start instruction;

[0033] After the first closing relay performs a closing action according to the control of the remote closing relay, the second switch control circuit is controlled to close.

[0034] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant according to the present invention, the tripping circuit comprises: a remote tripping relay and a first tripping relay;

[0035] The remote opening relay is connected to the shutdown command channel and the first tripping relay respectively;

[0036] The remote trip relay is used to receive the shutdown command transmitted by the shutdown command channel, and control the first trip relay to perform a tripping action according to the shutdown command;

[0037] After the first tripping relay performs a tripping action according to the control of the remote opening relay, the second switch control circuit is controlled to open.

[0038] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant according to the present invention, the second switch control circuit comprises: a contactor;

[0039] The contactor comprises: a holding coil and a closing coil;

[0040] The holding coil is used to keep the contactor in a closed state and control the contactor to open when power is lost;

[0041] The closing coil is used to control the closing action of the contactor, and when powered, controls the contactor to close.

[0042] In the system for suppressing electromagnetic interference by preferably driving a control module in a nuclear power plant according to the present invention, the suppression module comprises: a freewheeling circuit;

[0043] The positive end of the freewheeling circuit is connected to the negative end of the electromagnetic coil of the remote opening relay, and the negative end of the freewheeling circuit is connected to the positive end of the electromagnetic coil of the remote opening relay;

[0044] The freewheeling circuit is used to continue the current flow of the electromagnetic coil of the remote opening relay after the electromagnetic coil of the remote opening relay is powered off, so as to prolong the contact disconnection time of the remote opening relay.

[0045] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant of the present invention, the freewheeling circuit comprises: a freewheeling diode;

[0046] The anode of the freewheeling diode is the positive end of the freewheeling circuit, and the cathode of the freewheeling diode is the negative end of the freewheeling circuit.

[0047] In the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant described in the present invention, the preferred drive control device comprises: a switch quantity acquisition module, a programmable logic device, a first drive output module and a second drive output module;

[0048] The first drive output module is connected to the programmable logic device and is used to output a switch signal to the electrical switch panel;

[0049] The second drive output module is connected to the programmable logic device and is used to output a command confirmation signal to the electrical switch panel;

[0050] The switch quantity acquisition module is connected to the programmable logic device and is used to collect the feedback signal returned by the electrical switch panel;

[0051] The programmable logic device is used to receive the feedback signal and the control command or simulation command, perform priority management on the control command or simulation command, and drive the first drive output module and / or the second drive output module to operate.

[0052] The system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant implementing the present invention has the following beneficial effects: comprising a control system, a preferred drive control device, a suppression module, an electrical switch panel and an execution device; the control system sends a control command or a simulation command; the preferred drive control device performs priority management on the control command or the simulation command and sends a drive control instruction, and receives a feedback signal and transmits it to the control system; the electrical switch panel outputs a drive control signal according to the drive control instruction to drive the execution device, and returns a feedback signal; the suppression module suppresses the electromagnetic interference generated by the electrical switch panel when the control execution device is shut down, so as to prevent the preferred drive control device from overcurrent protection. The present invention suppresses electromagnetic interference through the suppression module to prevent the preferred drive control device from overcurrent protection, ensure the successful opening of the contactor, and ensure the normal shutdown of the execution device. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0054] Figure 1 It is a principle block diagram of a system for suppressing electromagnetic interference by optimizing a drive control module in a nuclear power plant provided by an embodiment of the present invention;

[0055] Figure 2 It is a circuit diagram of a system embodiment 1 of the preferred drive control module for suppressing electromagnetic interference in a nuclear power plant provided by the present invention;

[0056] Figure 3 The circuit diagram of the second embodiment of the system for suppressing electromagnetic interference by the preferred drive control module of a nuclear power plant provided by the present invention is

[0057] Figure 4 It is a principle block diagram of a preferred drive control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0058] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0059] refer to Figure 1 , which is a principle block diagram of an optional embodiment of a system for suppressing electromagnetic interference of a nuclear power plant preferred drive control module provided by the present invention.

[0060] Specifically, Figure 1 As shown, the system for suppressing electromagnetic interference of the preferred drive control module of the nuclear power plant includes: a control system 10, a preferred drive control device 20, a suppression module 30, an electrical switch panel 40 and an execution device 50.

[0061] The control system 10 is used to send a control command or a simulation command to the preferred drive control device 20. The preferred drive control device 20 is used to perform priority management on the control command or the simulation command and send a drive control instruction to the electrical switch panel 40, and receive a feedback signal output by the electrical switch panel 40 and transmit it to the control system 10. The electrical switch panel 40 is used to output a drive control signal to the execution device 50 according to the drive control instruction to drive the execution device 50, and return a feedback signal to the preferred drive control device 20. The suppression module 30 is used to suppress the electromagnetic interference generated by the electrical switch panel 40 when the control execution device 50 stops operating, so as to prevent the preferred drive control device 20 from overcurrent protection.

[0062] Optionally, in an embodiment of the present invention, the control system 10 may include but is not limited to a control room (main control room or remote shutdown station), a conventional instrumentation and control room, and a safety instrumentation and control room (including safety level and non-safety level).

[0063] Optionally, in an embodiment of the present invention, the preferred drive control device 20 may be an AV42 type drive control module with a preferred function. The preferred drive control device 20 may control the 6.6kV medium voltage motor equipment of a nuclear power plant. In the existing scheme, during the shutdown process of the motor equipment, the contactor holding coil may generate electromagnetic interference during the de-excitation process and introduce it into the feedback signal loop, thereby causing the AV42 module to trigger the overcurrent protection action, so that the output signal is cut off, and the contactor is unsuccessful in opening, resulting in the motor equipment being unable to shut down normally. Based on this problem, the present invention suppresses electromagnetic interference by setting a suppression module 30 according to the overcurrent protection action mechanism of the AV42 module and the transient current characteristics of electromagnetic interference in the feedback signal loop, thereby preventing the AV42 module from overcurrent protection action caused by electromagnetic interference, thereby solving the problem that the 6.6kV medium voltage motor equipment controlled by the current AV42 module cannot be shut down normally.

[0064] Optionally, in an embodiment of the present invention, a command transmission channel, a feedback transmission channel and a power supply channel are preferably provided between the drive control device 20 and the electrical switch panel 40 .

[0065] The command transmission channel is used for transmitting the drive control command or confirmation signal between the preferred drive control device 20 and the electrical switch panel 40. The feedback transmission channel is used for the electrical switch panel 40 to transmit the feedback signal to the preferred drive control device 20. The power supply channel is used for the preferred drive control device 20 to provide contact power to the electrical switch panel 40; the suppression module 30 is arranged on the power supply channel.

[0066] Optionally, in an embodiment of the present invention, the drive control instruction includes: a stop instruction (CMDOFF) and / or a start instruction (CMDON).

[0067] The feedback signal includes any one or more of a shutdown signal (TLOFF), an operation signal (TLON), a test position signal (TP), a switch panel fault signal (PCBTRIP) and a low voltage protection signal (UOFF).

[0068] Optionally, in an embodiment of the present invention, the instruction transmission channel includes: a shutdown instruction channel, a startup instruction channel and a confirmation channel.

[0069] The shutdown command channel is used for the preferred drive control device 20 to transmit a shutdown command to the electrical switch panel 40; the start command channel is used for the preferred drive control device 20 to transmit a start command to the electrical switch panel 40; the confirmation channel is used for the electrical switch panel 40 to transmit a confirmation signal (CONTROL) to the preferred drive control device 20.

[0070] The feedback transmission channels include: shutdown feedback channel, operation feedback channel, test position feedback channel, switch panel fault feedback channel and low voltage protection feedback channel.

[0071] The shutdown feedback channel is used to enable the gas switch panel 40 to feedback the shutdown signal to the preferred drive control device 20; the operation feedback channel is used to enable the gas switch panel 40 to feedback the operation signal to the preferred drive control device 20; the test position feedback channel is used to enable the gas switch panel 40 to feedback the test position signal to the preferred drive control device 20; the switch panel fault feedback channel is used to enable the gas switch panel 40 to feedback the switch panel fault signal to the preferred drive control device 20; the low voltage protection feedback channel is used to enable the gas switch panel 40 to feedback the low voltage protection signal to the preferred drive control device 20.

[0072] In some embodiments, the suppression module 30 includes: a unidirectional conduction circuit, wherein the positive end of the unidirectional conduction circuit is connected to the preferred drive control device 20 , and the negative end of the unidirectional conduction circuit is connected to the electrical switch panel 40 .

[0073] Optionally, in an embodiment of the present invention, the unidirectional conduction circuit includes: a reverse protection diode D1. The anode of the reverse protection diode D1 is the positive end of the unidirectional conduction circuit, and the cathode of the reverse protection diode D1 is the negative end of the unidirectional conduction circuit.

[0074] Specifically, in the embodiment of the present invention, the anti-reverse diode D1 is forward-conducting and reverse-blocking. When reverse current appears in the feedback signal loop, it is cut off by the diode, thereby ensuring that the overcurrent protection of the preferred drive control device 20 will not be triggered, avoiding the overcurrent protection action of the preferred drive control device 20 due to electromagnetic interference, thereby ensuring the normal shutdown of the execution device 50. At the same time, the normal power supply of the feedback signal loop is not affected.

[0075] Optionally, in the embodiment of the present invention, the anti-reverse diode D1 can adopt the TXS safety-level instrumentation and control system platform SDM4 standard diode, which meets the identification requirements of safety-level equipment, and the performance parameters meet the requirements. In addition, in the embodiment of the present invention, a standard mechanical module installation method can be adopted, and there is no need to change the internal results of the electrical switch panel 40 cabinet and the control cabinet, which is easy to implement.

[0076] Optionally, in an embodiment of the present invention, if Figure 2 As shown, the electrical switch panel 40 includes: a first switch control circuit 401 and a second switch control circuit 402 .

[0077] The first switch control circuit 401 is used to receive the drive control instruction sent by the preferred drive control device 20, and control the second switch control circuit 402 according to the drive control instruction; the first switch control circuit 401 is also used to feed back a confirmation signal to the preferred drive control device 20. The second switch control circuit 402 is used to start and stop the drive execution device 50 according to the control of the first switch control circuit 401, and output a feedback signal to the preferred drive control device 20.

[0078] The first switch control circuit 401 includes: a closing circuit and an opening circuit.

[0079] The closing circuit is used to control the second switch control circuit 402 to perform a closing action according to the drive control instruction output by the preferred drive control device 20. The opening circuit is used to control the second switch control circuit 402 to perform an opening action according to the drive control instruction output by the preferred drive control device 20.

[0080] Optionally, in an embodiment of the present invention, the closing circuit includes: a remote closing relay (001XR) and a first closing relay (001XF).

[0081] The remote closing relay is connected to the start command channel and the first closing relay respectively; the remote closing relay is used to receive the start command transmitted by the start command channel, and control the first closing relay to perform the closing action according to the start command; after the first closing relay performs the closing action according to the control of the remote closing relay, it controls the second switch control circuit 402 to close.

[0082] Optionally, in an embodiment of the present invention, the tripping circuit includes: a remote tripping relay (002XR) and a first tripping relay (001XD).

[0083] The remote trip relay is connected to the shutdown command channel and the first trip relay respectively. The remote trip relay is used to receive the shutdown command transmitted by the shutdown command channel, and control the first trip relay to perform a tripping action according to the shutdown command. After the first trip relay performs the tripping action according to the control of the remote trip relay, it controls the second switch control circuit 402 to open.

[0084] Optionally, in the embodiment of the present invention, the second switch control circuit 402 includes: a contactor (such as Figure 2 001JA in the figure).

[0085] The contactor comprises: a holding coil (YM) and a closing coil (YF).

[0086] The holding coil is used to keep the contactor in the closed state and control the contactor to open when power is lost. The closing coil is used to control the closing action of the contactor and control the contactor to close when power is restored.

[0087] Specifically, Figure 2 As shown, 001XR receives the remote start command (CMDON) from the preferred drive control device 20, and controls the action of 001XF. After 001XF acts according to the control of 001XR, it controls the closing action of 001JA. 002XR receives the remote shutdown command (CMDOFF) from the preferred drive control device 20, and controls the action of 001XD. After 001XD acts according to the control of 002XR, it controls the opening action of 001JA. Thus, the execution device 50 (such as Figure 2 M in the figure represents a motor) is running, and the execution device 50 is shut down by controlling the opening action of 001JA. When the execution device 50 is shut down and a transient reverse current appears in the feedback loop, the anti-reverse diode D1D1 can prevent the transient reverse current from entering the preferred drive control device 20, avoiding overcurrent protection of the preferred drive control device 20, and ensuring the normal shutdown of the execution device 50.

[0088] Or, in some other embodiments, such as Figure 3 As shown, the suppression module 30 may include: a freewheeling circuit.

[0089] The positive end of the freewheeling circuit is connected to the negative end of the electromagnetic coil of the remote opening relay, and the negative end of the freewheeling circuit is connected to the positive end of the electromagnetic coil of the remote opening relay. The freewheeling circuit is used to continue the electromagnetic coil of the remote opening relay after the electromagnetic coil of the remote opening relay is powered off, so as to extend the contact disconnection time of the remote opening relay.

[0090] Optionally, in an embodiment of the present invention, the freewheeling circuit includes: a freewheeling diode D2. The anode of the freewheeling diode D2 is the positive terminal of the freewheeling circuit, and the cathode of the freewheeling diode D2 is the negative terminal of the freewheeling circuit.

[0091] like Figure 3 As shown, when the electromagnetic coil of the remote trip relay is powered off, the current in the electromagnetic coil drops rapidly, and reverse induced electromotive force will be generated in the electromagnetic coil to release the magnetic field energy stored in the electromagnetic coil. By connecting a freewheeling diode D2 in parallel in the reverse direction of the electromagnetic coil of the remote trip relay, the reverse electromotive force can act on the circuit formed by the freewheeling diode D2 and the electromagnetic coil, consuming the energy released by the coil in the form of current. The direction of the current is consistent with the direction of the current when the electromagnetic coil is energized, thereby preventing the current in the electromagnetic coil from dropping, that is, achieving the freewheeling of the electromagnetic coil of the remote trip relay. The freewheeling diode D2 resists the influence of the induced electromotive force on the electromagnetic coil circuit, and also delays the release action time of the remote trip relay, thereby ensuring that the contactor is successfully tripped and the execution device 50 is shut down normally.

[0092] In the embodiment of the present invention, a freewheeling diode D2 is connected in reverse parallel to the remote opening relay to achieve freewheeling of the electromagnetic coil of the remote opening relay after power is cut off, thereby delaying the action response time of the remote opening relay, and further enabling the contactor to complete the opening between the output instruction being cut off and the remote opening relay being re-actuated, thereby solving the problem that the medium-voltage motor equipment controlled by the current preferred drive control device 20 cannot be shut down normally, and ensuring the normal shutdown of the medium-voltage motor equipment.

[0093] Optional, such as Figure 4 As shown, in the embodiment of the present invention, the preferred drive control device 20 may include: a switch quantity acquisition module 201 , an editable logic device 202 , a first drive output module 203 and a second drive output module 204 .

[0094] The first drive output module 203 is connected to the editable logic device 202, and is used to output a switch signal to the electrical switch panel 40. The switch signal is the drive control instruction (CMDOFF, CMDON), and CS is the contact power supply. Optionally, in an embodiment of the present invention, the first drive output module 203 is configured with its own protection circuit to prevent possible short circuit or overload, wherein the maximum load capacity of the shutdown instruction channel is 120mA, and the maximum load capacity of the power supply channel is 60mA. When the power supply channel is overloaded (the overcurrent protection setting is 1.3A), the PTC insurance is activated, and the output signal of the drive control device 20 is preferably cut off. When the fault is eliminated, the drive control device 20 automatically resumes normal operation.

[0095] The second drive output module 204 is connected to the editable logic device 202 and is used to output a command confirmation signal to the electrical switch panel 40. The command confirmation signal is CONTROL.

[0096] The switch quantity acquisition module 201 is connected to the editable logic device 202 and is used to collect feedback signals (PCBTRIP, TLOFF, TLON, TP, UOFF) returned by the electrical switch panel 40. Optionally, in the embodiment of the present invention, the switch quantity acquisition module 201 is a level conversion module with contact adjustment.

[0097] The editable logic device 202 is used to receive feedback signals and control commands or simulation commands, perform priority management on the control commands or simulation commands, and drive the first drive output module 203 and / or the second drive output module 204 to work.

[0098] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0099] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0100] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0101] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot limit the scope of protection of the present invention. All equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A system for suppressing electromagnetic interference by optimizing drive control modules in a nuclear power plant, characterized in that: include: control systems, preferably drive controls, suppression modules, electrical switch panels, and actuating equipment; The control system is used to send a control command or a simulation command to the preferred drive control device; The preferred drive control device is used to perform priority management on the control command or simulation command and send a drive control instruction to the electrical switch panel, and receive a feedback signal output by the electrical switch panel and transmit it to the control system; The electrical switch panel is used to output a drive control signal to the execution device according to the drive control instruction to drive the execution device, and return the feedback signal to the preferred drive control device; The electrical switch panel includes: a first switch control circuit and a second switch control circuit; The first switch control circuit is used to receive the drive control instruction sent by the preferred drive control device, and control the second switch control circuit according to the drive control instruction; the first switch control circuit is also used to feed back a confirmation signal to the preferred drive control device; the second switch control circuit is used to drive the start and stop of the execution device according to the control of the first switch control circuit, and output the feedback signal to the preferred drive control device; The first switch control circuit includes: a closing circuit and an opening circuit; the closing circuit is used to control the second switch control circuit to perform a closing action according to the drive control instruction output by the preferred drive control device; the opening circuit is used to control the second switch control circuit to perform an opening action according to the drive control instruction output by the preferred drive control device; The opening circuit comprises: a remote opening relay and a first tripping relay; the remote opening relay is connected to the shutdown command channel and the first tripping relay respectively; the remote opening relay is used to receive the shutdown command transmitted by the shutdown command channel, and control the first tripping relay to perform a tripping action according to the shutdown command; after the first tripping relay performs a tripping action according to the control of the remote opening relay, it controls the second switch control circuit to open; The suppression module is used to suppress the electromagnetic interference generated by the electrical switch panel when controlling the execution device to stop operation, so as to prevent the preferred drive control device from overcurrent protection; The suppression module includes: a freewheeling circuit; the positive end of the freewheeling circuit is connected to the negative end of the electromagnetic coil of the remote opening relay, and the negative end of the freewheeling circuit is connected to the positive end of the electromagnetic coil of the remote opening relay; the freewheeling circuit is used to continue the current of the electromagnetic coil of the remote opening relay after the electromagnetic coil of the remote opening relay is powered off, so as to extend the contact disconnection time of the remote opening relay.

2. The system for suppressing electromagnetic interference of the preferred drive control module of a nuclear power plant according to claim 1, characterized in that: A command transmission channel, a feedback transmission channel and a power supply channel are preferably provided between the drive control device and the electrical switch panel; The command transmission channel is used for the preferred drive control device and the electrical switch panel to transmit the drive control command or confirmation signal; The feedback transmission channel is used for the electrical switch panel to transmit a feedback signal to the preferred drive control device; The power supply channel is used for the preferred drive control device to provide contact power to the electrical switch panel; the suppression module is arranged on the power supply channel.

3. The system for suppressing electromagnetic interference of the preferred drive control module of a nuclear power plant according to claim 2, characterized in that: The drive control instructions include: a stop instruction and / or a start instruction; The feedback signal includes any one or more of a shutdown signal, an operation signal, a test position signal, a switch panel fault signal and a low voltage protection signal.

4. The system for suppressing electromagnetic interference of the preferred drive control module of a nuclear power plant according to claim 3, characterized in that: The command transmission channel includes: a shutdown command channel, a startup command channel and a confirmation channel; The shutdown command channel is used for the preferred drive control device to transmit the shutdown command to the electrical switch panel; the start command channel is used for the preferred drive control device to transmit the start command to the electrical switch panel; the confirmation channel is used for the electrical switch panel to transmit the confirmation signal to the preferred drive control device; The feedback transmission channels include: a shutdown feedback channel, an operation feedback channel, a test position feedback channel, a switch panel fault feedback channel and a low voltage protection feedback channel; The shutdown feedback channel is used for the electrical switch panel to feed back the shutdown signal to the preferred drive control device; the operation feedback channel is used for the electrical switch panel to feed back the operation signal to the preferred drive control device; the test position feedback channel is used for the electrical switch panel to feed back the test position signal to the preferred drive control device; the switch panel fault feedback channel is used for the electrical switch panel to feed back the switch panel fault signal to the preferred drive control device; and the low voltage protection feedback channel is used for the electrical switch panel to feed back the low voltage protection signal to the preferred drive control device.

5. The system for suppressing electromagnetic interference of the preferred drive control module of a nuclear power plant according to claim 1, characterized in that: The suppression module includes: a unidirectional conduction circuit; The positive end of the one-way conducting circuit is connected to the preferred drive control device, and the negative end of the one-way conducting circuit is connected to the electrical switch panel.

6. The system for suppressing electromagnetic interference of the preferred drive control module of a nuclear power plant according to claim 5, characterized in that: The one-way conducting circuit comprises: an anti-reverse diode; The anode of the anti-reverse diode is the positive end of the one-way conducting circuit, and the cathode of the anti-reverse diode is the negative end of the one-way conducting circuit.

7. The system for suppressing electromagnetic interference of a nuclear power plant's optimal drive control module according to claim 4, characterized in that: The closing circuit comprises: a remote closing relay and a first closing relay; The remote closing relay is connected to the start command channel and the first closing relay respectively; The remote closing relay is used to receive the start instruction transmitted by the start instruction channel, and control the first closing relay to perform a closing action according to the start instruction; After the first closing relay performs a closing action according to the control of the remote closing relay, the second switch control circuit is controlled to close.

8. The system for suppressing electromagnetic interference of a nuclear power plant's optimal drive control module according to claim 1, characterized in that: The second switch control circuit includes: a contactor; The contactor comprises: a holding coil and a closing coil; The holding coil is used to keep the contactor in a closed state and control the contactor to open when power is lost; The closing coil is used to control the closing action of the contactor, and when powered, controls the contactor to close.

9. The system for suppressing electromagnetic interference of a nuclear power plant's optimal drive control module according to claim 1, characterized in that: The freewheeling circuit comprises: a freewheeling diode; The anode of the freewheeling diode is the positive end of the freewheeling circuit, and the cathode of the freewheeling diode is the negative end of the freewheeling circuit.

10. The system for suppressing electromagnetic interference of a nuclear power plant's optimal drive control module according to any one of claims 1 to 9, characterized in that: The preferred drive control device comprises: a switch quantity acquisition module, a programmable logic device, a first drive output module and a second drive output module; The first drive output module is connected to the programmable logic device and is used to output a switch signal to the electrical switch panel; The second drive output module is connected to the programmable logic device and is used to output a command confirmation signal to the electrical switch panel; The switch quantity acquisition module is connected to the programmable logic device and is used to collect the feedback signal returned by the electrical switch panel; The programmable logic device is used to receive the feedback signal and the control command or simulation command, perform priority management on the control command or simulation command, and drive the first drive output module and / or the second drive output module to operate.

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