CN109150038B - System for judging excitation state of diesel generator of million-kilowatt nuclear power station - Google Patents
System for judging excitation state of diesel generator of million-kilowatt nuclear power station Download PDFInfo
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- CN109150038B CN109150038B CN201811162095.1A CN201811162095A CN109150038B CN 109150038 B CN109150038 B CN 109150038B CN 201811162095 A CN201811162095 A CN 201811162095A CN 109150038 B CN109150038 B CN 109150038B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/25—Special adaptation of control arrangements for generators for combustion engines
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Abstract
The invention relates to a system for judging the excitation state of a diesel generator of a million kilowatt nuclear power station, which comprises: the switch module comprises a control switch and is used for outputting an excitation state control instruction and a switch position signal; the first control module is connected with the switch module and used for receiving the excitation state control instruction and outputting a first control signal; the excitation module is connected with the excitation regulator and used for receiving a first control signal to control the working state of the excitation regulator; and the first indicating module is arranged on the centralized state monitoring screen, is connected with the first control module and is used for sending out first indicating light according to the first control signal. The problem that the excitation state judgment system of the diesel generator of the traditional million-kilowatt nuclear power station cannot correctly judge the actual working state of the excitation regulator in the diesel engine off state is effectively solved.
Description
Technical Field
The invention relates to the technical field of generators of nuclear power stations and auxiliary systems thereof, in particular to a system for judging the excitation state of a diesel generator of a million-kilowatt nuclear power station.
Background
The million-kilowatt pressurized water reactor nuclear power station has become the most popular nuclear power station in the world due to the obvious characteristics of compact structure and better safety and economy. The emergency diesel generating set is the most important safety emergency power supply of the nuclear power plant designed by the concept of 'deep defense' of the nuclear power plant, and forms a multi-channel redundant power supply system of the nuclear power plant factory power supply together with other power supplies of the nuclear power plant. The safety-level emergency power supply is used as a safety-level emergency power supply for ensuring that a reactor can be maintained at a controllable safety level during the operation and accident of a nuclear power station and preventing the occurrence or diffusion of the nuclear accident, and the reliability and the availability of the safety-level emergency power supply are required to be ensured.
Because the pressurized water reactor has the characteristic that a large amount of waste heat needs to be discharged after the reactor is stopped, the power supply reliability of the service power is particularly important for ensuring the nuclear safety, and therefore, a multi-path power supply is designed. Aiming at the power supply design of the emergency diesel generating set, 2 completely independent diesel generating sets are configured in a single pile according to the redundancy design idea of N-1 to provide emergency power supplies for mutually redundant plant safety power supply systems. In order to further provide the power supply reliability of the emergency power supply, according to the supplement regulation of the design and construction rules of the pressurized water reactor nuclear power plant system, an additional emergency diesel generating set is additionally arranged in a nuclear power base and is a backup emergency power supply system shared by nuclear power generating sets, so that one emergency diesel generating set can be replaced under necessary conditions. Under the condition that any nuclear power unit in the base is in a replacement requirement, the replacement switching operation is manually implemented to realize the replacement access of the additional diesel generator set to the corresponding emergency bus, and the emergency power supply of the emergency bus is recovered, so that the condition that the related systems and equipment of the fifth diesel generator set are in a state of being in the design requirement at any time and under any condition is guaranteed. This is usually achieved by means of the design of the fifth diesel engine power supply system itself, the management of the programs, and the experience and skill of the personnel, which ensure that the individual devices are set to the desired target conditions.
The excitation controller of the diesel generator of the million-kilowatt nuclear power station is used as a key device for influencing the function realization of the fifth diesel engine, the state correctness of the excitation controller directly influences the final realization of the function of the fifth diesel engine as a standby emergency power supply, and no definite state indication function exists in the standby shutdown state of the excitation controller, so that the information that the excitation controller is not in the correct state can be easily found.
Disclosure of Invention
The invention aims to provide a system for judging the excitation state of a diesel generator of a million kilowatt nuclear power station, which can correctly indicate the actual working state of an excitation regulator in the off-state of a diesel engine.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
a system for judging the excitation state of a diesel generator of a million-kilowatt nuclear power station comprises:
the switch module comprises a control switch, the switch module is used for outputting an excitation state control instruction and a switch position signal, the excitation state control instruction comprises a manual excitation state control instruction and an automatic excitation state control instruction, the switch position signal comprises a manual position signal and an automatic position signal, and the control switch is configured to be effective when the control switch is arranged at the manual position and pressed down; when the control switch is arranged at the automatic position and pressed down, the automatic excitation state control instruction is effective;
the first control module is connected with the switch module and used for receiving the excitation state control instruction and outputting a first control signal, wherein the first control signal comprises a first closing signal and a first opening signal, and the first control signal is configured to output the first closing signal when the excitation state control instruction is a manual excitation state control instruction; outputting the first disconnection signal when the excitation state control instruction is an automatic excitation state control instruction;
the excitation module is respectively connected with the first control module and the excitation regulator and is used for receiving the first control signal to control the working state of the excitation regulator, and when the first control signal is the first closing signal, the working state of the excitation regulator is a manual state; when the first control signal is a disconnection signal, the working state of the excitation regulator is an automatic state;
the first indicating module is arranged on the centralized state monitoring screen, connected with the first control module and used for receiving the first control signal, and is configured to emit first indicating light when the first control signal is the first closing signal.
The excitation state judgment system for the diesel generator of the million kilowatt-level nuclear power station effectively solves the problems that in the traditional excitation state judgment system for the diesel generator of the million kilowatt-level nuclear power station, the first control module is connected with the excitation module, the excitation module is connected with the excitation regulator, the excitation module is used for receiving a first control signal to control the working state of the excitation regulator, the first indicating module sends out first indicating light according to the working state of the excitation regulator and a switch position signal, an operator can indirectly judge the actual working state of the excitation regulator through the on-off condition of the first indicating light and the switch position of the control switch, but because the power supply of the excitation module is provided by the voltage at the generator terminal, when the diesel engine is stopped, the power supply of the excitation module is zero, therefore, the working state of the excitation regulator is reflected to be an automatic state no matter what the control signal sent by the first control module. In order to solve the problem that the actual working state of the excitation regulator cannot be correctly judged by the first indicating module when the diesel engine is stopped, the first indicating module is connected with the first control module and is used for receiving a first control signal sent by the first control module to send first indicating light, so that the actual working state of the excitation regulator can be directly judged by the on-off condition of the first indicating light, because the first control module is used for controlling the excitation module, the excitation module is connected with the excitation regulator, and when the first control signal is a first closing signal, the working state of the excitation regulator is in a manual state; when the first control signal is a disconnection signal, the working state of the excitation regulator is an automatic state, so that the first control module is used for indirectly controlling the working state of the excitation regulator, the first indication module is connected with the first control module, and an operator can directly judge the actual working state of the excitation regulator through the on and off conditions of the first indication light no matter the diesel engine is in a running state or a shutdown state, so that the problem that the fifth conventional diesel generator set cannot visually judge due to the excitation control state mode, only depends on the skill and the operation effectiveness of the operator, lacks visual auxiliary judgment means of a third party, further introduces higher personnel failure risk and causes the unavailability of important key systems of the nuclear power plant is solved.
In one embodiment, the state determination system further includes:
the second control module is connected with the excitation regulator and used for outputting a second control signal according to the working state of the excitation regulator, wherein the second control signal comprises a second opening signal and a second closing signal, and the second control signal is configured to output the second closing signal when the working state of the excitation regulator is a manual state; outputting the second off signal when the working state of the excitation regulator is an automatic state;
and the second indicating module is arranged on the centralized state monitoring screen, is connected with the second control module and is used for receiving the second control signal and the switch position signal, and is configured to emit second indicating light when the second control signal is the second closing signal and the switch position signal is the automatic position signal or when the second control signal is the second opening signal and the switch position signal is the manual position signal.
In one embodiment, the first indication module comprises:
the third control module is connected with the first control module and used for receiving the first control signal and outputting a third control signal, wherein the third control signal comprises a third closing signal and a third opening signal, and the third control module is configured to output the third closing signal when the first control signal is the first closing signal; outputting the third turn-off signal when the first control signal is the first turn-off signal;
a first display module coupled to the third control module, the first display module configured to emit the first indication light when the third control signal is the third close signal.
In one embodiment, the third control module comprises an opto-isolator relay module comprising:
the optical coupling control unit is connected with the first control module and used for receiving the first control signal and outputting an optical coupling control signal;
the optical coupler output unit is connected with the first display module and used for receiving the optical coupler control signal and outputting a fourth control signal, wherein the fourth control signal comprises a fourth closing signal and a fourth opening signal, and the optical coupler output unit is configured to output a fourth closing signal when the first control signal is the first closing signal; and outputting a fourth disconnection signal when the first control signal is the first disconnection signal.
In one embodiment, the first control module comprises a first relay, and a normally open contact of the first relay is connected with the optocoupler control unit to form an optocoupler control loop; the third control module further comprises a second relay, a coil of the second relay is connected with the optical coupling output unit to form an optical coupling output loop, a normally open contact of the second relay is connected with the first display module to form a first display loop, the optical coupling control loop is connected with the safety level power supply, and the optical coupling output loop and the first display loop are respectively connected with the non-safety level power supply.
In one embodiment, the first indication module includes a first indicator light, the first indicator light is disposed on the centralized state monitoring screen, and the centralized state monitoring screen is connected to the first control module and is configured to display a signal state of the first control module according to the first control signal.
In one embodiment, the first indication module comprises:
and the light word plate display unit is connected with the first control module and comprises a light word plate display caption, the light word plate display caption is in a power generator excitation state of manual operation, and the light word plate display unit is configured to display the caption in a power generator excitation state of manual operation when the first control module outputs the first closing signal.
In one embodiment, the excitation module further comprises:
the excitation state control relay module is connected with the first control module and used for receiving the first control signal and outputting an excitation state signal and controlling the working state of the excitation regulator, wherein the excitation state signal comprises a state closing signal and a state opening signal, and when the excitation state signal is the state closing signal, the working state of the excitation regulator is a manual state; when the excitation state signal is the state disconnection signal, the working state of the excitation regulator is an automatic state; the excitation state control relay module is configured to output a state close signal when the first control signal is the first close signal; outputting a state off signal when the first control signal is the first off signal;
the centralized state monitoring screen is used for receiving the excitation state signal and displaying the working state of the excitation regulator.
In one embodiment, the second indicator module includes a second indicator light disposed on the central status monitoring screen.
In one embodiment, the control switch is a TPL type switch.
Drawings
FIG. 1 is a system diagram of an excitation state determination system for a diesel generator of a million kilowatt nuclear power plant in an embodiment;
FIG. 2 is a system diagram of an excitation state determination system for a diesel generator of a million kilowatt nuclear power plant according to another embodiment;
FIG. 3 is a circuit diagram of a second indicating module in another embodiment;
FIG. 4 is a schematic structural diagram of a first indicating module in an embodiment;
FIG. 5a is a schematic circuit diagram of an optocoupler-isolation relay module according to an embodiment;
FIG. 5b is a circuit diagram of a first control module according to an embodiment;
FIG. 5c is a circuit diagram of a first display loop according to an embodiment;
FIG. 6 is a circuit diagram of an excitation module in an embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present invention, "a plurality" means at least one, e.g., one, two, etc., unless specifically limited otherwise.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, fig. 1 is a system configuration diagram of an excitation state determination system of a diesel generator of a million kilowatt nuclear power station in an embodiment.
A system for judging the excitation state of a diesel generator of a million-kilowatt nuclear power station comprises:
the switch module 100 comprises a control switch 101, the switch module 100 is used for outputting an excitation state control instruction 1001 and a switch position signal, the excitation state control instruction 1001 comprises a manual excitation state control instruction and an automatic excitation state control instruction, the switch position signal comprises a manual position signal and an automatic position signal, and the control switch 101 is configured to enable the manual excitation state control instruction when the control switch 101 is placed in a manual position and pressed down; when the control switch 101 is placed in an automatic position and pressed, the automatic excitation state control instruction is valid;
the first control module 200 is connected to the switch module 100, and is configured to receive the excitation state control instruction 1001 and output a first control signal 2001, where the first control signal 2001 includes a first close signal and a first open signal, and the first control signal 2001 is configured to output the first close signal when the excitation state control instruction 1001 is the manual excitation state control instruction; outputting a first off signal when the excitation state control instruction 1001 is an automatic excitation state control instruction;
the excitation module 300 is respectively connected to the first control module 200 and the excitation regulator 500, and is configured to receive a first control signal 2001 to control a working state of the excitation regulator 500, and when the first control signal 2001 is a first close signal, the working state of the excitation regulator 500 is a manual state; when the first control signal 2001 is an off signal, the operating state of the excitation regulator 500 is an automatic state;
and a first indicating module 400 disposed on the concentration state monitoring screen 40, connected to the first control module 200, for receiving the first control signal 2001, the first indicating module 400 being configured to emit a first indicating light when the first control signal 2001 is a first close signal.
The excitation state judgment system for the diesel generator of the million-kilowatt-class nuclear power station effectively solves the problems that in the traditional excitation state judgment system for the diesel generator of the million-kilowatt-class nuclear power station, the first control module 200 is connected with the excitation module 300, the excitation module 300 is connected with the excitation regulator 500, the excitation module 300 is used for receiving the first control signal 2001 to control the working state of the excitation regulator 500, the first indicating module 400 sends out first indicating light according to the working state of the excitation regulator 500 and a switch position signal, an operator can indirectly judge the actual working state of the excitation regulator 500 through the on and off conditions of the first indicating light and the switch position of the control switch 101, but because the power supply of the excitation module 300 is provided by the generator terminal voltage, when the diesel engine is shut down, the power supply of the excitation module 300 is zero, no matter what the control signal is sent by the first control module 200, the operating state of the field regulator 500 is all reflected as an automatic state. In order to solve the problem that the actual working state of the excitation regulator 500 cannot be correctly judged by the first indicating module 400 when the diesel engine is stopped, the first indicating module 400 is connected with the first control module 200, the first indicating module 400 is used for receiving a first control signal 2001 sent by the first control module 200 and sending first indicating light, so that the actual working state of the excitation regulator 500 can be directly judged by the on-off condition of the first indicating light, because the first control module 200 is used for controlling the excitation module 300, the excitation module 300 is connected with the excitation regulator 500, and when the first control signal 2001 is a first closing signal, the working state of the excitation regulator 500 is a manual state; when the first control signal 2001 is an off signal, the working state of the excitation regulator 500 is an automatic state, so the first control module 200 is used to indirectly control the working state of the excitation regulator 500, the first indication module 400 is connected with the first control module 200, and an operator can directly judge the actual working state of the excitation regulator 500 through the on and off conditions of the first indication light no matter the diesel engine is in an operating state or a shutdown state, thereby effectively solving the problem that the current fifth diesel generator set cannot realize intuitive judgment due to the excitation control state mode, only depends on the skill and the operation effectiveness of the operator, lacks an intuitive third-party auxiliary judgment means, further introduces higher personnel failure risk, and causes the unavailability of important key systems of the nuclear power plant.
In one embodiment, referring to fig. 2, fig. 2 is a system configuration diagram of an excitation state determination system of a diesel generator of a million kilowatt class nuclear power station in another embodiment, where the state determination system further includes:
a second control module 600, connected to the excitation regulator 500, for outputting a second control signal 6001 according to an operating state of the excitation regulator 500, where the second control signal 6001 includes a second open signal and a second close signal, and the second control signal 6001 is configured to output the second close signal when the operating state of the excitation regulator 500 is the manual state; outputting a second off signal when the operating state of the excitation regulator 500 is the automatic state;
and a second indicating module 410, disposed on the centralized status monitoring panel 40, connected to the second control module 600, for receiving the second control signal 6001 and the switch position signal 1002, wherein the second indicating module 410 is configured to emit a second indicating light when the second control signal 6001 is a second close signal and the switch position signal 1002 is an automatic position signal, or when the second control signal 6001 is a second open signal and the switch position signal 1002 is a manual position signal.
In an embodiment, the first control module 200 is connected to the excitation module 300, the excitation module 300 is connected to the excitation regulator 500, the excitation module 300 controls the operating state of the excitation regulator 500 by receiving the first control signal 2001, the first indication module 400 is connected to the first control module 200, the first indication module 400 is configured to emit a first indication light when the first control signal 2001 is the first closing signal, so as to directly judge the actual operating state of the excitation regulator 500 by judging the operating state of the control switch 101, when the first indication module 400 fails, the first indication module 400 cannot directly judge the actual operating state of the excitation regulator 500 by judging the operating state of the control switch 101, to solve this problem, on the basis of the excitation state judgment system of the megakilowatt-class diesel generator of the nuclear power plant in the above-mentioned embodiment, the second control module 600 and the second indication module 410 are added, the second control module 600 is connected to the excitation regulator 500, the second indication module 410 is connected to the second control module 600, and the second indication module 410 is configured to emit a second indication light when the second control signal 6001 output by the second control module 600 is a second close signal and the switch position signal 1002 is an automatic position signal, or when the second control signal 6001 is a second open signal and the switch position signal 1002 is a manual position signal.
Referring to fig. 3, fig. 3 is a circuit schematic diagram of the second indication module 410 in the present embodiment, when the operating state of the excitation regulator 500 is the manual state, that is, the contacts 49 and 50 are closed, the second control module 600 outputs the second closing signal, that is, the contacts 11 and 14 are closed, if the control switch 101 is in the automatic position and the circuit 001 is turned on, the second indication module 410 emits the second indication light, which indicates that the actual operating state of the excitation regulator 500 is inconsistent with the position state of the control switch 101; if the control switch 101 is in the manual position at this time, the manual state of the excitation regulator 500 is consistent, and the second indication module 410 does not emit the second indication light; when the working state of the excitation regulator 500 is the automatic state, i.e. the contacts 49 and 50 are opened, the second control module 600 outputs the second opening signal, i.e. the contacts 11 and 12 are closed, and if the control switch 101 is in the automatic position at this time and is consistent with the automatic state of the excitation regulator 500, the second indication module 410 does not emit the second indication light; if the control switch 101 is in the manual position at this time and the loop 002 is turned on, the second indicating module 410 emits a second indicating light indicating that the actual operating state of the excitation regulator 500 is inconsistent with the position state of the control switch 101. Therefore, when the diesel engine is running, an operator can indirectly judge the working state of the excitation regulator 500 according to the on/off condition of the second indication light emitted by the second indication module 410 through the position state of the control switch 101, and meanwhile, by combining the principle that the first indication module 400 directly judges the working state of the excitation regulator 500 in the above-mentioned first embodiment, the judgment of the state mode of the diesel engine excitation regulator 500 is more definite and accurate, the defect that the state information feedback error is caused by the fact that the excitation module 300 has no power supply when the original system is designed in the diesel engine shutdown state is avoided, and meanwhile, the misjudgment of the operator is avoided.
Further, referring to fig. 4, fig. 4 is a schematic structural diagram of a first indicating module 400 in an embodiment, where the first indicating module 400 includes:
a third control module 402 connected to the first control module 400, for receiving the first control signal 2001 and outputting a third control signal 4021, where the third control signal 4021 includes a third close signal and a third open signal, and the third control module 402 is configured to output the third close signal when the first control signal 2001 is the first close signal; outputting a third off signal when the first control signal 2001 is the first off signal;
and a first display module 404 connected to the third control module 402, wherein the first display module 404 is configured to emit a first indication light when the third control signal 4021 is the third close signal.
Further, the third control module 402 includes an optical coupler isolation relay module 4020, referring to fig. 5a, where fig. 5a is a schematic circuit diagram of the optical coupler isolation relay module 4020 in an embodiment, and the optical coupler isolation relay module 4020 includes:
the optical coupling control unit 4022 is connected with the first control module 200 and used for receiving the first control signal 2001 and outputting an optical coupling control signal;
the optical coupler output unit 4024 is connected with the first display module 40, and is configured to receive the optical coupler control signal and output a fourth control signal, where the fourth control signal includes a fourth close signal and a fourth open signal, and the optical coupler output unit is configured to output the fourth close signal when the first control signal 2001 is the first close signal; the fourth turn-off signal is output when the first control signal 200 is the first turn-off signal.
Further, the first control module 200 comprises a first relay 403XR, and normally open contacts 31 and 34 of the first relay 403XR are connected with an optical coupling control unit 4022 to form an optical coupling control loop 003; the third control module 402 further comprises a second relay 135XR, a coil of the second relay 135XR is connected with an optical coupling output unit 4024 to form an optical coupling output loop 004, normally open contacts 11 and 14 of the second relay 135XR are connected with the first display module 40 to form a first display loop 005, the optical coupling control loop 003 is connected with the safety level power supply 10, and the optical coupling output loop 004 and the first display loop 005 are respectively connected with the non-safety level power supply 20.
Referring to fig. 5b, fig. 5b is a schematic circuit diagram of the first control module 200 in an embodiment, where the first control module 200 includes a first relay 403XR, and normally open contacts 31 and 34 of the first relay 403XR are connected to an optical coupling control unit 4022 to form an optical coupling control loop 003; the third control module 402 further includes a second relay 135XR, a coil of the second relay 135XR is connected with an optical coupling output unit 4024 to form an optical coupling output loop 004, normally open contacts 11 and 14 of the second relay 135XR are connected with the first display module 40 to form a first display loop 005, the influence of a newly added first display loop 005 on an original circuit is reduced by separating the optical coupling output loop 004, a power supply of the first display loop 005 and a power supply of an optical coupling control loop 003, referring to fig. 5c, fig. 5c is a circuit schematic diagram of the first display loop 005 in an embodiment, since the fifth diesel engine excitation regulator 500 directly influences the function of the fifth diesel engine generator, the first relay 403XR originally adopts a 1E-level safety-level power supply to supply the coil action power supply, the optical coupling isolation relay module 4020 for transition from the 1E-level safety-level power supply to the N1E-level non-safety-level power supply is added, the isolation between the non-safety-level power supply and the safety-level power supply is realized, and the related influence of two paths of power supplies with different levels under the condition of extreme circuit short circuit or fault is avoided.
Further, the first indication module 404 includes a first indicator light disposed on the concentration state monitoring screen 40, and the concentration state monitoring screen 40 is connected to the first control module 200 for displaying the signal state of the first control module 200 according to the first control signal 2001.
On the centralized status monitoring screen 40, a first indicator light for indicating the actual operating status of the field regulator 500 is designed, and is used to display the operating status actually set for the field regulator 500, and assist the operator to know the actual operating status setting information of the field regulator 500. The working principle is as follows: normally open contact 31 with first relay 403XR, 34 are as the control of first pilot lamp, increase the isolation that optical coupling output unit 4024 regarded as IE level safety level power opto-coupler control circuit 003 and NIE level non-safety level power opto-coupler output circuit 004 in opto-coupler control unit 4022, normally open contact 31, 34 of first relay 403XR pass through opto-coupler isolation relay module 4020 with state information for second relay 135XR, by the normally open contact 11 of second relay 135XR, the lighting and the extinguishing of the first pilot lamp of 14 control.
Further, the first indication module 404 includes:
and a light signboard display unit connected to the first control module 200, including a light signboard to display a caption, "generator excitation state is manual", configured to display the caption "generator excitation state is manual" when the first control module 200 outputs the first close signal.
The auxiliary judgment means of a third party is added, so that the actual manual working state of the excitation regulator 500 of the fifth diesel engine can be more directly reflected, and the failure of the automatic emergency function when the fifth diesel engine is stopped due to the inherent design of the fifth diesel engine and the operation or judgment error of an operation operator is avoided. The generator excitation control system is connected with a light character plate display unit through a first control module 200, the light character plate display unit comprises light character plate display subtitles, and the light character plate display subtitles are 'generator excitation command is manual'. When the excitation regulator 500 is in a manual state, the first relay 403XR in the first control module 200 is excited, the normally open contacts 31 and 34 of the first relay 403XR are closed, and the light character plate display unit displays a caption that the generator excitation command is manual to remind an operator.
Further, referring to fig. 6, fig. 6 is a circuit schematic diagram of the excitation module 300 in an embodiment, and the excitation module 300 further includes:
the excitation state control relay module is connected with the first control module 200 and is used for receiving a first control signal 2001 and outputting an excitation state signal and controlling the working state of the excitation regulator 500, wherein the excitation state signal comprises a state closing signal and a state opening signal, and when the excitation state signal is the state closing signal, the working state of the excitation regulator 500 is a manual state; when the excitation state signal is the state disconnection signal, the working state of the excitation regulator 500 is the automatic state; the excitation state control relay module is configured to output a state close signal when the first control signal 2001 is a first close signal; outputting a state off signal when the first control signal 2001 is a first off signal;
the centralized status monitor 40 is used for receiving the excitation status signal and displaying the operation status of the excitation regulator 500.
The excitation module 300 comprises a relay K1 and a relay K7, and the working principle is as follows: when the control switch 101 is placed in a manual position and pressed, the first relay 403XR in the first control module 200 is excited, the normally open contacts 21 and 24 of the first relay 403XR are closed, the contacts 47 and 48 are closed, the relay K1 is excited, then the relay K7 is excited, the excitation state signal is a state closing signal, namely the contacts 49 and 50 are closed, and at the moment, the working state of the excitation regulator 500 is a manual state; when the control switch 101 is set to the automatic position and pressed, the first relay 403XR in the first control module 200 is de-energized, the normally open contacts 21 and 24 of the first relay 403XR are opened, the contacts 47 and 48 are opened, the relay K1 is de-energized, then the relay K7 is de-energized, the excitation state signal is a state open signal, that is, the contacts 49 and 50 are opened, and the operating state of the excitation regulator 500 is the automatic state.
If the excitation regulator 500 is set in the manual state for the reasons of testing or debugging, etc., and is not successfully returned to the automatic state when the testing or debugging is finished, and the diesel engine is started next time, the operator turns the control switch 101 to the automatic position but does not press down or does not press down in place (normally, the control switch 101 needs to be selected in the manual or automatic position and the relevant excitation state control instruction is pressed down to be effective), so that the first control signal 2001 output by the first control module 200 is the first closing control signal, the excitation state control relay module outputs the state closing signal, the actual working state of the excitation regulator 500 is still in the manual state, the excitation state control relay module is connected with the first control module 200 and is used for receiving the first control signal 2001 to output the excitation state signal, the centralized state monitoring screen 40 is used for receiving the excitation state signal output by the excitation state control relay module to display the working state of the excitation regulator 500, therefore, through the centralized monitoring screen 40, the operator can more accurately judge that the working state of the excitation regulator 500 is still in the manual state at this time, and it is avoided that the operator cannot accurately judge that the actual excitation regulator works in the manual state, the actual working state of the excitation regulator 500 is in the manual state, the voltage is automatically built up to 55% of the rated voltage, and the voltage cannot be automatically boosted, and the voltage of the generator is always lower than 70% of the rated voltage of the protected action voltage, so that the generator is shut down due to the low-voltage protection action after the excitation switch is switched on.
Further, the second indication module 410 includes a second indication lamp, the second indication lamp is disposed on the centralized state monitoring screen 40, when the diesel engine operates, an operator can indirectly determine the working state of the excitation regulator 500 through the position of the control switch 101 according to the on and off conditions of the second indication lamp on the centralized state monitoring screen 40, and meanwhile, the judgment of the state mode of the diesel engine magnetic excitation regulator 500 is more definite and accurate by combining the principle that the on and off conditions of the first indication lamp on the centralized state monitoring screen 40 directly determine the working state of the excitation regulator 500, so that the defect of wrong state information feedback caused by the fact that the excitation module 300 has no power supply when the original system is designed in the off state of the diesel engine is avoided, and meanwhile, the misjudgment of the operator is avoided.
Specifically, the control switch 101 is a TPL type switch. The working principle of the TPL type switch is as follows: when the switch position is at the automatic position and the excitation regulator 500 is actually in the manual mode, the first indicator light should be turned on to indicate that the switch position does not conform to the actual working state of the excitation regulator 500, and an operator can indirectly judge the actual working state of the excitation regulator 500 by controlling the position state of the switch 101 according to the on-off state of the first indicator light.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A system for judging excitation state of a diesel generator of a million kilowatt nuclear power station is characterized by comprising:
the switch module comprises a control switch, the switch module is used for outputting an excitation state control instruction and a switch position signal, the excitation state control instruction comprises a manual excitation state control instruction and an automatic excitation state control instruction, the switch position signal comprises a manual position signal and an automatic position signal, and the control switch is configured to be effective when the control switch is arranged at the manual position and pressed down; when the control switch is arranged at the automatic position and pressed down, the automatic excitation state control instruction is effective;
the first control module is connected with the switch module and used for receiving the excitation state control instruction and outputting a first control signal, wherein the first control signal comprises a first closing signal and a first opening signal, and the first control signal is configured to output the first closing signal when the excitation state control instruction is a manual excitation state control instruction; outputting the first disconnection signal when the excitation state control instruction is an automatic excitation state control instruction;
the excitation module is respectively connected with the first control module and the excitation regulator and is used for receiving the first control signal to control the working state of the excitation regulator, and when the first control signal is the first closing signal, the working state of the excitation regulator is a manual state; when the first control signal is a disconnection signal, the working state of the excitation regulator is an automatic state;
the first indicating module is arranged on the centralized state monitoring screen, connected with the first control module and used for receiving the first control signal, and is configured to emit first indicating light when the first control signal is the first closing signal.
2. The excitation state judgment system of the diesel generator of the million kilowatt class nuclear power station as claimed in claim 1, wherein the state judgment system further comprises:
the second control module is connected with the excitation regulator and used for outputting a second control signal according to the working state of the excitation regulator, wherein the second control signal comprises a second opening signal and a second closing signal, and the second control signal is configured to output the second closing signal when the working state of the excitation regulator is a manual state; outputting the second off signal when the working state of the excitation regulator is an automatic state;
and the second indicating module is arranged on the centralized state monitoring screen, is connected with the second control module and is used for receiving the second control signal and the switch position signal, and is configured to emit second indicating light when the second control signal is the second closing signal and the switch position signal is the automatic position signal or when the second control signal is the second opening signal and the switch position signal is the manual position signal.
3. The excitation state judgment system of the diesel generator of the million kilowatt class nuclear power station as claimed in claim 1, wherein the first indication module comprises:
the third control module is connected with the first control module and used for receiving the first control signal and outputting a third control signal, wherein the third control signal comprises a third closing signal and a third opening signal, and the third control module is configured to output the third closing signal when the first control signal is the first closing signal; outputting the third turn-off signal when the first control signal is the first turn-off signal;
a first display module coupled to the third control module, the first display module configured to emit the first indication light when the third control signal is the third close signal.
4. The excitation state determination system for the diesel generator of the million kilowatt-class nuclear power station according to claim 3, wherein the third control module comprises an optical coupling isolation relay module, and the optical coupling isolation relay module comprises:
the optical coupling control unit is connected with the first control module and used for receiving the first control signal and outputting an optical coupling control signal;
the optical coupler output unit is connected with the first display module and used for receiving the optical coupler control signal and outputting a fourth control signal, wherein the fourth control signal comprises a fourth closing signal and a fourth opening signal, and the optical coupler output unit is configured to output a fourth closing signal when the first control signal is the first closing signal; and outputting a fourth disconnection signal when the first control signal is the first disconnection signal.
5. The excitation state judgment system of the diesel generator of the million kilowatt-level nuclear power station as claimed in claim 4, wherein the first control module comprises a first relay, and a normally open contact of the first relay is connected with the optocoupler control unit to form an optocoupler control loop; the third control module further comprises a second relay, a coil of the second relay is connected with the optical coupling output unit to form an optical coupling output loop, a normally open contact of the second relay is connected with the first display module to form a first display loop, the optical coupling control loop is connected with the safety level power supply, and the optical coupling output loop and the first display loop are respectively connected with the non-safety level power supply.
6. The excitation state judgment system of the diesel generator of the million kilowatt-class nuclear power station as claimed in claim 1, wherein the first indication module comprises a first indicator light, the first indicator light is disposed on the centralized state monitoring screen, and the centralized state monitoring screen is connected to the first control module and is configured to display a signal state of the first control module according to the first control signal.
7. The excitation state judgment system of the diesel generator of the million kilowatt class nuclear power station according to any one of claims 1, 3 or 6, characterized in that the first indication module comprises:
and the light word plate display unit is connected with the first control module and comprises a light word plate display caption, the light word plate display caption is in a power generator excitation state of manual operation, and the light word plate display unit is configured to display the caption in a power generator excitation state of manual operation when the first control module outputs the first closing signal.
8. The excitation state judgment system of the diesel generator of the million kilowatt-class nuclear power station as claimed in claim 1, wherein the excitation module further comprises:
the excitation state control relay module is connected with the first control module and used for receiving the first control signal and outputting an excitation state signal and controlling the working state of the excitation regulator, wherein the excitation state signal comprises a state closing signal and a state opening signal, and when the excitation state signal is the state closing signal, the working state of the excitation regulator is a manual state; when the excitation state signal is the state disconnection signal, the working state of the excitation regulator is an automatic state; the excitation state control relay module is configured to output a state close signal when the first control signal is the first close signal; outputting a state off signal when the first control signal is the first off signal;
the centralized state monitoring screen is used for receiving the excitation state signal and displaying the working state of the excitation regulator.
9. The excitation state judging system of the diesel generator of the million kilowatt class nuclear power station as recited in claim 2, wherein the second indicating module comprises a second indicating lamp, and the second indicating lamp is arranged on the centralized state monitoring screen.
10. The excitation state judgment system of the diesel generator of the million kilowatt-class nuclear power station as claimed in claim 1, wherein the control switch is a TPL type switch.
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| CN201811162095.1A CN109150038B (en) | 2018-09-30 | 2018-09-30 | System for judging excitation state of diesel generator of million-kilowatt nuclear power station |
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| CN201811162095.1A CN109150038B (en) | 2018-09-30 | 2018-09-30 | System for judging excitation state of diesel generator of million-kilowatt nuclear power station |
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| JP2535210B2 (en) * | 1988-08-29 | 1996-09-18 | 西芝電機株式会社 | Synchronous generator automatic voltage regulator |
| JPH06284792A (en) * | 1993-03-26 | 1994-10-07 | Mitsumi Electric Co Ltd | Motor driving circuit |
| US9252695B2 (en) * | 2014-03-12 | 2016-02-02 | General Electric Company | Brushless permanent magnet generator plus auxiliary voltage source constant potential exciter |
| CN104201724B (en) * | 2014-07-30 | 2017-06-20 | 国家电网公司 | A kind of small hydropower station generator excitation regulating system and method |
| CN104836402A (en) * | 2015-05-22 | 2015-08-12 | 张健强 | Automatic-excitation IGBT exciter |
| CN105673314A (en) * | 2016-02-29 | 2016-06-15 | 福建省智能科技有限公司 | Medium and small water-turbine generator set DSPIC comprehensive controller |
| CN106026811B (en) * | 2016-05-12 | 2018-06-26 | 国家电网公司 | Excitation System on Pumped Storage Power Stations black starting-up control device and its control method |
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