CN105322853B - A kind of redundancy structure of nuclear power plant's excitation system - Google Patents
A kind of redundancy structure of nuclear power plant's excitation system Download PDFInfo
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- CN105322853B CN105322853B CN201410363292.5A CN201410363292A CN105322853B CN 105322853 B CN105322853 B CN 105322853B CN 201410363292 A CN201410363292 A CN 201410363292A CN 105322853 B CN105322853 B CN 105322853B
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Abstract
The embodiment of the invention discloses a kind of redundancy structure of nuclear power plant's excitation system, including：Redundant Control power supply, redundant signals loop, redundancy trip(ping) circuit and redundancy rectifier bridge.Aforementioned four redundant module has carried out Redundancy Design to control power supply, signal circuit, trip(ping) circuit and rectifier bridge respectively.The embodiment of the present invention has the advantages that：The present invention considers that nuclear power plant to the redundancy requirement of excitation system, fully ensures that nuclear power plant's excitation system is safely and steadly run by four redundant modules comprehensively from excitation system entirety.
Description
Technical field
The present invention relates to nuclear power technology, more particularly to a kind of redundancy structure of nuclear power plant's excitation system.
Background technology
Because nuclear power plant is to the rigors of safety and stability, in the design of nuclear power plant's electricity generation system, each subsystem
It is required for using Redundancy Design in the design of system.One of important component that excitation system generates electricity as nuclear power plant, existing skill
It is general to excitation system in art to use parallel redundancy and stand-by redundancy two schemes.In parallel redundancy structure, bridge certain is run
It is neighbouring in trigger sequence, will flow through phase fault for turning off the support arm of the controllable silicon when straight-through failure occurs in controllable silicon
Electric current.Because parallel redundancy design is generally two branch circuit parallel connections, the short circuit current will be enough the support arm that makes operation bridge and emergency bridge
Fast molten fusing, so as to cause doube bridge to exit and chaser.Therefore, in the case of being less than three for parallel branch number, parallel redundancy knot
Structure is acted on without redundancy this common fault type, so generally use stand-by redundancy structure.
In the global design for considering excitation system, the power supply of two passages of stand-by redundancy structural requirement can not have the connection of electricity
System, the Control card power supply that two passages use can not have the contact of electricity.And in the prior art, stand-by redundancy structure is only
Redundancy has been carried out to rectifier bridge, integrated demand of the nuclear power plant to excitation system redundancy can not be met.
The content of the invention
Technical problem to be solved of the embodiment of the present invention is, can not for existing nuclear power plant's excitation system redundancy structure
Meet the defects of nuclear power plant is to the integrated demand of excitation system redundancy, there is provided a kind of redundancy knot of comprehensive nuclear power plant excitation system
Structure, fully to meet integrated demand of the nuclear power plant to excitation system redundancy.
In order to solve the above-mentioned technical problem, the embodiments of the invention provide a kind of redundancy structure of nuclear power plant's excitation system,
Including：Redundant Control power supply, redundant signals loop, redundancy trip(ping) circuit and redundancy rectifier bridge；
The Redundant Control power supply is used to carry out control power supply redundancy, and the control power supply is used to supply for Control card
Electricity, the Redundant Control power supply are used to power for Redundant Control board；The redundant signals loop is used for the Control card
Signal circuit carry out redundancy, the redundant signals loop connects the Redundant Control board；The redundancy trip(ping) circuit is used for
Redundancy is carried out to trip(ping) circuit, the trip(ping) circuit and the redundancy trip(ping) circuit are between degaussing switch and G-T protective
Circuit；The redundancy rectifier bridge is used to carry out rectifier bridge in the alternating current of redundancy, the rectifier bridge and redundancy rectifier bridge to input
Direct current is obtained after carrying out rectification and is exported to exchange exciter rotor winding.
Preferably, the Redundant Control power supply includes redundant direct current control power supply and redundancy ac control power supply；
The redundant direct current control power supply is used to carry out redundancy to DC control supply；The redundancy ac control power supply is used
In to the ac control power supply progress redundancy from exchange pilot exciter.
Wherein, the input of the redundancy ac control power supply and the ac control power supply is become by two low pressure respectively
Depressor is connected to the output end of the exchange pilot exciter.
Preferably, the signal circuit includes input signal loop and output signal loop；
Input signal include the increase and decrease magnetic from control room, demagnetization and hand/automatic selector switch on-off model and
Participate in excitation system measurement and the generator terminal voltage of control and the analog signalses of generator terminal electric current；Output signal is included extremely
Field regulator channel failure signal, limiter action signal and the power system stabilizer, PSS to power network of control room put into letter
Number.
Wherein, the input of the Control card and the Redundant Control board respectively by single pressure-wire and individually
Electric current line the voltage and current of generator is sampled.
The control room is connected to after the output end parallel connection of the Control card and the Redundant Control board.
Preferably, the redundancy trip(ping) circuit includes degaussing switch end redundancy unit and G-T protective end redundancy unit；
The contact that degaussing switch end redundancy unit is used to participate in degaussing switch G-T protective logic carries out redundancy；
The loop that G-T protective end redundancy unit is used to make G-T protective degaussing switch to trip carries out redundancy.
Preferably, the redundancy rectifier bridge is connected to by a degaussing switch with the input of the rectifier bridge and exchanges pair
The output end of exciter.
Preferably, under accident conditions, it is whole that the rectifier bridge and the Control card switch to the redundancy simultaneously respectively
Flow bridge and the Redundant Control board.
Preferably, the redundancy rectifier bridge module configures with the Redundant Control board with cabinet.
Implement the embodiment of the present invention, have the advantages that：The present invention is in stand-by redundancy design, from excitation system
System is overall to set out, and devises Redundant Control power supply, redundant signals loop, redundancy trip(ping) circuit and redundancy rectifier bridge totally four redundancies
Module, integrated demand of the nuclear power plant to excitation system redundancy is fully ensured that, there is higher safety and stability.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the redundancy structure schematic diagram of first embodiment nuclear power plant provided by the invention excitation system；
Fig. 2 is the redundancy structure schematic diagram of second embodiment nuclear power plant provided by the invention excitation system；
Fig. 3 is 3rd embodiment control power supply redundancy structural representation provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, Fig. 1 is the redundancy structure schematic diagram of first embodiment nuclear power plant provided by the invention excitation system.
As shown in figure 1, the excitation system that the present embodiment provides includes two excitation passages：Passage 10 and passage 20, wherein passage 10 are
System default excitation passage, and passage 20 is redundant channel, when accident occurs for passage 10, system is switched to from passage 10 automatically
Passage 20, so as to ensure that excitation system continues normal operation.In passage 10, alternating current caused by magneto 1 is by going out
It is input in rectifier bridge 13 after magnetic switch 2 and the AC of passage 10 switch 11 and carries out rectification, and then from the output end of rectifier bridge 13
Output direct current is simultaneously input on the rotor windings 31 of AC exciter 3, is worked for AC exciter 3.In passage 20, permanent magnetism
Alternating current caused by generator 1 is input in redundancy rectifier bridge 23 after degaussing switch 2 and the AC of passage 20 switch 21
Row rectification, and then export direct current from the output end of redundancy rectifier bridge 23 and be input on the rotor windings 31 of AC exciter 3,
Worked for AC exciter 3.
In addition, Control card 12 to the firing angle of rectifier bridge 13 in addition to being controlled, moreover it is possible to communicated with rectifier bridge 13, it is whole
Its work state information can be sent to Control card 12 by stream bridge 13.When Control card 12 detects 13 failure of rectifier bridge, meeting
Switching signal is sent to the Redundant Control board 22 in passage 20.Connection between Control card 12 and Redundant Control board 22
It can be electrical connection or wireless connection, can also be that optical fiber connects.When Control card 12 is sent out to Redundant Control board 22
After sending switching signal, Redundant Control board 22 switches simultaneously with redundancy rectifier bridge 23, and Control card 12 and rectifier bridge 13 stop work
Make.Redundant Control board 22 and redundancy rectifier bridge 13 carry out redundancy to Control card 12 and rectifier bridge 13 respectively, therefore when switching
During to passage 20, passage 20 and the operation principle of passage 10 are identical with signal transmission, that is to say, that Redundant Control board 22
It is identical with Control card 12 and rectifier bridge 13 with the 26S Proteasome Structure and Function of redundancy rectifier bridge 23.
In the redundancy structure for nuclear power plant's excitation system that the present embodiment provides, the input/output signal of Control card 12 is returned
Road 16 has equally carried out redundancy setting.As shown in figure 1, input/output signal loop 16 includes being connected to control panel from sampling end 4
The input signal loop of 12 inputs and the output signal time that control signal receiving terminal 5 is connected to from the output end of Control card 12
Road.And redundant signals loop 26 include from sampling end 4 be connected to the redundant input signal circuit of the input of Redundant Control plate 22 with
And the redundant output signal loop of control signal receiving terminal 5 is connected to from the output end of Redundant Control plate 22.Provided by the invention
In one preferred embodiment, input signal includes the switching value of the increase and decrease magnetic from control room, demagnetization and hand/automatic selector switch
Signal and the measurement of participation excitation system and the generator terminal voltage of control and the analog signalses of generator terminal electric current.Output letter
Number include to control room field regulator channel failure signal, limiter action signal and the power system stability to power network
Device puts into signal.
In order to ensure the security of excitation system, the present embodiment has also carried out redundancy to the power supply of Control card 12 and matched somebody with somebody
Put, it is respectively that Control card 12 and Redundant Control board 22 are powered to control power supply 14 and Redundant Control power supply 24, and controls electricity
There is no contacting for electricity between source 14 and Redundant Control power supply 24.
Further, the trip(ping) circuit 15 of the present embodiment has also carried out redundancy setting, and its redundancy structure trips for redundancy
Loop 25.As shown in figure 1, the circuit of trip(ping) circuit 15 and redundancy trip(ping) circuit 25 between degaussing switch 2 and G-T protective 6
Loop.Trip(ping) circuit 15 further comprises degaussing switch terminal circuit from degaussing switch 2 to G-T protective 6 and protected from transformer unit
Shield 6 to degaussing switch 2 G-T protective terminal circuit.Wherein, degaussing switch terminal circuit is that degaussing switch 2 participates in G-T protective
The circuit of logic, including the contact for participating in G-T protective logic；G-T protective terminal circuit is that G-T protective 6 makes to go out
The circuit that magnetic switch 2 trips.In the present embodiment, redundancy trip(ping) circuit participates in the logic of G-T protective 6 to degaussing switch 2 respectively
Contact and G-T protective 6 make degaussing switch 2 trip circuit carried out redundancy setting.
It should be understood that the present invention in stand-by redundancy design, from excitation system entirety, devises Redundant Control electricity
Source 24, redundant signals loop 26, redundancy trip(ping) circuit 25 and redundancy rectifier bridge 23 totally four redundant modules, have fully ensured that nuclear power
Factory has higher safety and stability to the integrated demand of excitation system redundancy.Two excitations provided by the invention are led to, i.e.,
The contact of electricity, and the power supply of Control card that two passages use is not present in the rectification of road passage 10 and passage 20, i.e.,
Contacting for electricity is also not present between Redundant Control power supply 24 and control power supply 14, has substantially ensured that the safety and stably of circuit.Separately
Outside, modelled signal loop Redundancy Design is passed through, it is ensured that in single cabinet maintenance or passage handoff procedure, any operation and signal fluctuation
Had an impact all without to input/output signal.In excitation system, because degaussing switch 2 can not carry out Redundancy Design, in order to
Excitation system is set tightly to coordinate with relay protection, the present invention fully ensures that demagnetization is opened by carrying out Redundancy Design to trip(ping) circuit
2 close fits with G-T protective 6 are closed, improve security of system.
Fig. 2 is referred to, Fig. 2 is the redundancy structure schematic diagram of second embodiment nuclear power plant provided by the invention excitation system.
As shown in Fig. 2 the circuit loop that the present embodiment provides includes 3 main current loops, wherein loop 60 is power generation circuit, and system is sent out
Caused alternating current is delivered to power network by motor 71 after generator main switch 72 and transformer 73.Loop 20 and loop 40 are excitations
Loop, wherein loop 20 are system default energized circuit, and loop 40 is redundancy energized circuit.When being broken down in loop 20,
System switches to loop 40 from loop 20 automatically, so as to ensure that excitation system continues normal operation.In loop 20, pilot exciter
Alternating current caused by 1 by degaussing switch Q01 and the AC in loop 20 switch Q20 after be input in rectifier bridge 23 carry out it is whole
Stream, and then export direct current from the output end of rectifier bridge 23 and be input to turning for AC exciter 3 after Q22 is switched by DC side
On sub- winding 31, being worked for AC exciter 3, AC exciter 3 is further attached on the rotor windings of system generator 71,
The reactive power that control system generator 71 exports.In loop 40, alternating current caused by pilot exciter 1 passes through degaussing switch
It is input to after the Q01 and AC in loop 40 switch Q40 in rectifier bridge 43 and carries out rectification, so it is defeated from the output end of rectifier bridge 43
Go out direct current and be input to after switching Q42 by DC side on the rotor windings 31 of AC exciter 3, for the work of AC exciter 3
Make, AC exciter 3 is further attached on the rotor windings of system generator 71, the idle work(that control system generator 71 exports
Rate.That is, passage 20 and passage 40 have common portion, that is, pilot exciter 1 and degaussing switch Q01 are exchanged, exchange pair is encouraged
Alternating current caused by magnetomechanical 1 from degaussing switch Q01 output end by being connected to rectifier bridge 23 and superfluous simultaneously after degaussing switch Q01
The input of remaining rectifier bridge 43.
Control card 22 is by detecting the alternating current of the input on rectifier bridge 23 and then controllable two pole into rectifier bridge 23
Pipe sends control signal, so as to control the firing angle of controllable diode.In addition, Control card 22 can also communicate with rectifier bridge 23,
Its work state information is sent to Control card 22 by rectifier bridge 23, when Control card 22 detects 23 failure of rectifier bridge, meeting
Switching signal is sent to the Redundant Control plate 42 in passage 40.Communication between Control card 22 and Redundant Control board 42 can
To be by electrical connection or wireless connection, it can also be that optical fiber connects.When Control card 22 is to Redundant Control board 42
After sending switching signal, Redundant Control board 42 switches simultaneously with redundancy rectifier bridge 43, and Control card 22 and rectifier bridge 23 all stop
Only work.Redundant Control board 42 and redundancy rectifier bridge 43 carry out redundancy to Control card 22 and rectifier bridge 23 respectively, therefore work as
When being switched to passage 40, passage 40 and the operation principle of passage 20 are identical with signal transmission, that is to say, that Redundant Control plate
The 26S Proteasome Structure and Function of card 42 and redundancy rectifier bridge 43 is identical with Control card 22 and rectifier bridge 23.As described in Figure 2, in this reality
Apply in example, Control card 22 is configured in cabinet 100 with rectifier bridge 23 with cabinet, Redundant Control board 42 and 43 same cabinet of redundancy rectifier bridge
It is configured in cabinet 200.
Meanwhile in the redundancy structure of nuclear power plant's excitation system of the present embodiment offer, the input and output to Control card 22
Signal circuit has equally carried out redundancy setting.As shown in Fig. 2 the input signal of Control card 22 includes opening from control room 8
Measure signal and participate in the simulation of the set end voltage and generator terminal electric current of the system generator 71 of excitation system measurement and control in pass
Measure signal；And the output signal on Control card 22 is included to the control signal of control room 8.At one provided by the invention preferably
In embodiment, the on-off model of on-off model bag increase and decrease magnetic, demagnetization and hand/automatic selector switch from control room 8, and
The signal of input control room 8 includes field regulator channel failure signal, limiter action signal and the power train to power network
Stabilizer of uniting puts into signal.In the present embodiment, sampled point 800 is provided with to the set end voltage of system generator 71 and generator terminal electric current,
Include two voltage sample points and two current sample points, the sampled voltage and an electric current of one of voltage sample point respectively
Sampled point sample rate current is input to the signal input part of Control card 22, and the sampled voltage of another voltage sample point and another
Individual current sample point sampling electric current is input to the signal input part of Redundant Control board 42.And Control card 22 and Redundant Control plate
The signal input part of control room 8 is connected to after the signal output part parallel connection of card 42.And the signal output part of control room 8 then connects respectively
It is connected to the signal input part of Control card 22 and Redundant Control board 42.
As shown in Fig. 2 the present embodiment also includes control power supply 24 and Redundant Control power supply 44.Control power supply 24 and redundancy control
Power supply 44 processed is respectively used to power for Control card 22 and Redundant Control board 42.Control power supply 24 includes DC control supply
DC1 and ac control power supply AC1, and Redundant Control power supply 44 includes redundant direct current control power supply DC2 and control electricity is exchanged with redundancy
Source AC2.Output ends of the ac control power supply AC1 from exchange pilot exciter 1, low-tension transformer is inputted after overcurrent fuse F70
The input of control power supply 24, output ends of the redundancy ac control power supply AC2 from exchange pilot exciter 1, warp are connected to after T04
The input for controlling power supply 44 is connected to after low-tension transformer T05 is inputted after overcurrent fuse F71.DC control supply DC1's is defeated
Go out the input that end is connected directly to control power supply 24, and redundant direct current control power supply DC2 output end is connected directly to control
The input of power supply 44.
Implement the present embodiment, effectively the input signal of Control card 22 and Redundant Control board 42 is kept apart and carried out
Redundancy is set, while the control power supply 24 and Redundant Control power supply 44 that will also be powered for Control card 22 and Redundant Control board 42
Input keep apart and carry out redundancy setting, fully ensured that the safety of excitation system.
Fig. 3 is referred to, Fig. 3 is 3rd embodiment control power supply redundancy structural representation provided by the invention.Such as Fig. 3 institutes
Show, the control power supply redundancy structure that the present embodiment provides includes two dc source DC1 and DC2, generation alternating current every
From transformer 400, switch 1,2,3,4 switchs for four totally, electric power source distribution device 18 and redundant power distributor 28 and excitation system
600.The input of the input power distributor 18 after switch 1 of direct current caused by dc source DC1, isolating transformer 400 produce
The input of raw alternating current same input power distributor 18 after switch 2, the output end of electric power source distribution device 18, which is connected to, encourages
Magnetic system 600, and then powered for excitation system 600.And in another way Redundant Control power supply, direct current caused by dc source DC2
Electricity inputs the input of redundant power distributor 28 after switch 4, and alternating current caused by isolating transformer 400 is same after switch 3
The input of sample input redundant power distributor 28, the output end of redundant power distributor 28 are connected to excitation system 600, and then
Powered for excitation system.In the equivalent circuit of excitation system, connected between electric power source distribution device 18 and redundant power distributor 28
Two back-to-back diodes, it is ensured that without electrical connection between electric power source distribution device 18 and redundant power distributor 28.
By implementing the present embodiment, by using electric power source distribution device 18 and redundant power distributor 28, not only to control electricity
Source has carried out redundancy setting, and the input of control power supply and Redundant Control power supply and output end is all isolated, and makes
It has fully ensured that the safety of excitation system and the stable operation of excitation system in case of a fault without electrical connection.
Foregoing description is related to various modules.The combination that these modules generally include hardware and/or hardware and software is (such as solid
Change software).These modules can also include the computer-readable medium comprising instruction (for example, software instruction) (for example, permanent
Medium), when these instructions of computing device, it is possible to perform the various functions feature of the present invention.Correspondingly, unless clearly
It is required that the specific hardware and/or software feature in the module that the scope of the present invention does not specifically mention in by embodiment are limited.Make
For non-limitative example, the present invention can be by one or more processors (such as microprocessor, data signal in embodiment
Reason device, BBP, microcontroller) execution software instruction (such as it is stored in volatile memory and/or permanent storage
Device).In addition, the present invention can also use application specific integrated circuit (ASIC) and/or other hardware elements to perform.It is pointed out that
Above in the description to various modules, these modules are divided into, are for clarity.However, in actually implementing, various moulds
The boundary of block can be fuzzy.For example, any or all functional module herein can share various hardware and/or soft
Part element.In another example any and/or all functional module herein can be by shared computing device software instruction Lai complete
Portion or part are implemented.In addition, the various software submodules performed by one or more processors can be between various software modules
It is shared.Correspondingly, unless explicitly requested, the scope of the present invention not mandatory boundary between by various hardware and/or software element
Limitation.
The above disclosed power for being only a kind of preferred embodiment of the present invention, the present invention can not being limited with this certainly
Sharp scope, one of ordinary skill in the art will appreciate that realizing all or part of flow of above-described embodiment, and weighed according to the present invention
Profit requires made equivalent variations, still falls within and invents covered scope.
Claims (1)
- A kind of 1. redundancy structure of nuclear power plant's excitation system, it is characterised in that including：Redundant Control power supply, redundant signals loop, Redundancy trip(ping) circuit and redundancy rectifier bridge；The Redundant Control power supply is used to carry out control power supply redundancy, and the control power supply is used to power for Control card, institute State Redundant Control power supply and be used to be the power supply of Redundant Control board；The Redundant Control power supply includes redundant direct current control power supply and superfluous Remaining ac control power supply, the input of the redundancy ac control power supply and ac control power supply are become by corresponding low pressure respectively Depressor is connected to the output end of exchange pilot exciter, and the redundant direct current control power supply is used for superfluous to DC control supply progress Remaining, the redundancy ac control power supply is used to carry out redundancy to the ac control power supply from exchange pilot exciter；The redundant signals loop is used to carry out the signal circuit of the Control card redundancy, the redundant signals loop connection The Redundant Control board；The signal circuit of the Control card and the redundant signals loop include input signal loop With output signal loop, input signal includes the switching value letter of the increase and decrease magnetic from control room, demagnetization and hand/automatic selector switch Number and participate in excitation system measurement and the generator terminal voltage of control and the analog signalses of generator terminal electric current, output signal Including field regulator channel failure signal, limiter action signal and the power system stabilizer, PSS to power network to control room Put into signal；The redundancy trip(ping) circuit is used to carry out redundancy, the trip(ping) circuit and the redundancy trip(ping) circuit to trip(ping) circuit to go out Circuit between magnetic switch and G-T protective；The redundancy trip(ping) circuit includes degaussing switch end redundancy unit and transformer unit is protected Protect end redundancy unit；The contact that degaussing switch end redundancy unit is used to participate in degaussing switch G-T protective logic is carried out Redundancy；The loop that G-T protective end redundancy unit is used to make G-T protective degaussing switch to trip carries out redundancy；The redundancy rectifier bridge is used to carry out rectifier bridge redundancy, and the input of the redundancy rectifier bridge and the rectifier bridge passes through One degaussing switch is connected to the output end of exchange pilot exciter, and the rectifier bridge and redundancy rectifier bridge enter to the alternating current of input Direct current is obtained after row rectification and is exported to exchange exciter rotor winding；Wherein, the input of the Control card and the Redundant Control board is respectively by single pressure-wire and individually electric Streamline samples to the voltage and current of generator, after the output end parallel connection of the Control card and the Redundant Control board It is connected to the control room；Wherein, the redundancy rectifier bridge configures with the Redundant Control board with cabinet, under accident conditions, the rectifier bridge and institute State Control card respectively while switch to the redundancy rectifier bridge and the Redundant Control board.
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| CN106655744A (en) * | 2016-12-19 | 2017-05-10 | 南京南瑞继保电气有限公司 | Current limiting control method for rectifier bridges |
| CN109150039B (en) * | 2018-10-19 | 2024-03-08 | 嘉陵江亭子口水利水电开发有限公司 | Excitation system and control method |
| CN111596542A (en) * | 2020-05-26 | 2020-08-28 | 江苏核电有限公司 | Electric regulating valve driving device with redundancy function and control method thereof |
| CN111739669B (en) * | 2020-07-24 | 2022-02-01 | 中国核动力研究设计院 | Redundant excitation structure, system and method suitable for rod position detector of nuclear power station |
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