CN219227277U - Ferromagnetic resonance suppression verification circuit, device and equipment for emergency power supply of nuclear power plant - Google Patents
Ferromagnetic resonance suppression verification circuit, device and equipment for emergency power supply of nuclear power plant Download PDFInfo
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- CN219227277U CN219227277U CN202320093938.7U CN202320093938U CN219227277U CN 219227277 U CN219227277 U CN 219227277U CN 202320093938 U CN202320093938 U CN 202320093938U CN 219227277 U CN219227277 U CN 219227277U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Abstract
The utility model relates to a ferromagnetic resonance suppression verification circuit, a ferromagnetic resonance suppression verification device and ferromagnetic resonance suppression verification equipment for an emergency power supply of a nuclear power plant, wherein the ferromagnetic resonance suppression verification circuit comprises: the device comprises an interface circuit, a plurality of first voltage transformers, a resonance control circuit, a plurality of resonance elimination circuits and a wave recording circuit, wherein one end of the interface circuit is connected with a bus and the other end of the interface circuit is used for being connected with an emergency power supply, the first voltage transformers are connected with the bus, the resonance control circuit is connected with the bus and used for being matched with each first voltage transformer to control resonance characteristics of the emergency power supply, the resonance elimination circuits are connected with output ends of the first voltage transformers in a one-to-one correspondence mode and used for inhibiting resonance, and the wave recording circuit is connected with the bus and used for collecting waveform data of the bus; the utility model has positive effects on improving the working stability and reliability of the emergency power supply of the nuclear power plant, and has the advantages of simple circuit structure and low cost.
Description
Technical Field
The utility model relates to the technical field of nuclear power plant emergency power supplies, in particular to a ferromagnetic resonance suppression verification circuit, a ferromagnetic resonance suppression verification device and ferromagnetic resonance suppression verification equipment for a nuclear power plant emergency power supply.
Background
In a nuclear power plant, when an abnormality occurs in a general power source, it is necessary to supply power to some necessary systems, such as a fire protection system, a loop monitoring system, etc., through an emergency power source, so as to ensure that the nuclear power plant can operate safely and stably.
Because the emergency power supply supplies power to various systems through the power supply switch cabinet, a plurality of electromagnetic devices are usually arranged in the power supply switch cabinet, so that ferromagnetic resonance is easy to generate due to interaction between an output bus of the power supply and the electromagnetic devices, and although the power supply system of the common power supply is provided with corresponding resonance elimination measures, the power supply system structure of the emergency power supply and the power supply system structure of the common power supply are greatly different, so that ferromagnetic resonance inhibition measures of the common power supply are not applicable to the power supply system of the emergency power supply, so that resonance cannot be well inhibited, and normal power supply of the emergency power supply is greatly hindered; the number of power supply switch cabinets for supplying power to the emergency power supply is large, the distribution range is wide, and if the ferromagnetic resonance suppression effect is verified repeatedly on a real system, the workload is large, and the normal operation of the real system can be influenced.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a ferromagnetic resonance suppression verification circuit, a ferromagnetic resonance suppression verification device and ferromagnetic resonance suppression verification equipment for an emergency power supply of a nuclear power plant.
The technical scheme adopted for solving the technical problems is as follows: a ferromagnetic resonance suppression verification circuit for an emergency power supply of a nuclear power plant is constructed, which comprises:
one end of the interface circuit is connected with the bus, and the other end of the interface circuit is used for being connected with an emergency power supply;
a plurality of first voltage transformers connected with the bus;
a resonance control circuit connected with the bus for cooperating with each of the first voltage transformers to control resonance characteristics of the emergency power supply;
a plurality of resonance elimination circuits which are connected with the output ends of the first voltage transformers in a one-to-one correspondence manner and used for inhibiting resonance;
the wave recording circuit is connected with the bus and used for collecting waveform data of the bus.
In one of the alternative embodiments, each of the first voltage transformers includes three primary windings and three secondary windings; the secondary windings are sequentially connected in series to form an open triangular loop; each primary winding is connected with each phase line of the bus one by one, and the first end and the second end of the open triangular loop are correspondingly output ends of the first voltage transformer.
In one of the alternative embodiments, each of the detuning circuits comprises:
the harmonic eliminator is connected with the open triangular loop in parallel;
and the first end of the adjustable resistor is connected with the first end of the harmonic eliminator, and the second end and the adjusting end of the adjustable resistor are connected with the second end of the harmonic eliminator.
In one of the alternative embodiments, the detuner is a microcomputer detuner.
In one of the alternative embodiments, the detuning circuit further comprises:
a first circuit breaker, a first end of which is connected with a first end of the open delta loop, and a second end of which is connected with a second end of the open delta loop through the harmonic eliminator;
and the first end of the second circuit breaker is connected with the first end of the open triangular loop, and the second end of the second circuit breaker is connected with the second end of the open triangular loop through the adjustable resistor.
In one of the alternative embodiments, the resonance control circuit comprises:
the capacitance simulation unit is used for simulating the capacitance of the emergency power supply to the ground and is connected with the bus;
and the short-circuit unit is used for controlling the ground short-circuit of one phase line of the emergency power supply and is connected with one phase line of the bus.
In one of the alternative embodiments, the short-circuit unit comprises a contactor; one end of the contactor is connected with one phase line of the bus, and the other end of the contactor is grounded.
In one of the alternative embodiments, the wave recording circuit includes:
the input end of the second voltage transformer is connected with the bus;
and the wave recorder is connected with the output end of the second voltage transformer.
The utility model also constructs a ferromagnetic resonance suppression verification device for the emergency power supply of the nuclear power plant, which comprises the ferromagnetic resonance suppression verification circuit for the emergency power supply of the nuclear power plant provided by the embodiment of the utility model.
The utility model also constructs ferromagnetic resonance suppression verification equipment for the emergency power supply of the nuclear power plant, which comprises the ferromagnetic resonance suppression verification device for the emergency power supply of the nuclear power plant provided by the embodiment of the utility model.
By implementing the technical scheme of the utility model, the interface circuit is connected with the emergency power supply to be verified, the resonance control circuit simulates and controls the bus of the emergency power supply to generate ferromagnetic resonance, then the first voltage transformers and the resonance elimination circuits are mutually matched to inhibit resonance signals in the bus, and the wave recording circuit is used for collecting waveform data of the bus, so that a worker can judge whether the inhibition effect of the resonance elimination circuits meets the standard requirement according to the waveform data, and the utility model has positive effects on improving the working stability and reliability of the emergency power supply of the nuclear power plant.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a nuclear power plant emergency power source ferroresonant suppression verification circuit in accordance with some embodiments of the present utility model;
FIG. 2 is a circuit diagram of a nuclear power plant emergency power source ferroresonance suppression verification circuit in accordance with some embodiments of the present utility model.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a nuclear power plant emergency power source ferroresonance suppression verification circuit for verifying the effectiveness of measures implemented to eliminate ferroresonance in an emergency power source of a nuclear power plant in some embodiments of the utility model. The nuclear power plant emergency power supply ferromagnetic resonance suppression verification electricity comprises: the device comprises an interface circuit 1, a plurality of first voltage transformers 2, a resonance control circuit 3 used for being matched with each first voltage transformer 2 to control resonance characteristics of an emergency power supply, a plurality of resonance elimination circuits 4 corresponding to each first voltage transformer 2 and used for inhibiting resonance, and a wave recording circuit 5 used for collecting waveform data of a bus.
One end of the interface circuit 1 is connected with the bus, the other end of the interface circuit 1 is used for being connected with an emergency power supply, each first voltage transformer 2 is connected with the bus respectively, the resonance control circuit 3 is connected with the bus, each resonance elimination circuit 4 is connected with the output end of each first voltage transformer 2 in a one-to-one correspondence mode, and the wave recording circuit 5 is connected with the bus.
In this embodiment, the interface circuit 1 is connected with the emergency power supply to be checked, then the resonance control circuit 3 simulates the real application environment of the emergency power supply to be checked, and controls the bus of the emergency power supply to be checked to generate ferromagnetic resonance, and the resonance characteristic is consistent or similar to the resonance characteristic when the emergency power supply to be checked is in real work, then the first voltage transformers 2 and the resonance eliminating circuits 4 are mutually matched to inhibit resonance signals in the bus, and waveform data of the bus are collected through the wave recording circuit 5, so that a worker can judge whether the inhibition effect of the resonance eliminating circuits 4 meets the standard requirement according to the waveform data, and further, if the inhibition effect of the resonance eliminating circuits 4 meets the standard requirement, the worker can configure the consistent resonance eliminating circuits 4 in the real application environment of the emergency power supply to be checked, thereby effectively inhibiting the ferromagnetic resonance on the bus of the emergency power supply to be checked, and has positive effects on improving the working stability and reliability of the emergency power supply of the nuclear power plant.
In some embodiments, as shown in fig. 2, each first voltage transformer 2 includes three primary windings and three secondary windings.
Each secondary winding is sequentially connected in series to form an open triangular loop; each primary winding is connected with each phase line of the bus one by one, and the first end and the second end of the open triangular loop are correspondingly output ends of the first voltage transformer 2.
In this embodiment, the first end and the second end of the open triangle loop in each first voltage transformer 2 are respectively connected with each harmonic elimination circuit 4 in a one-to-one correspondence manner, so that each harmonic elimination circuit 4 can be coupled with a bus through the first voltage transformer 2, and further can inhibit the resonance signal of the bus.
In some embodiments, as shown in fig. 2, each detuning circuit 4 comprises a detuner X1 and an adjustable resistor R1; optionally, the harmonic eliminator X1 is a microcomputer harmonic eliminator X1, and the adjustable resistor R1 is a high-power adjustable resistor R1.
The harmonic eliminator X1 is connected with the open triangular loop in parallel, the first end of the adjustable resistor R1 is connected with the first end of the harmonic eliminator X1, and the second end and the adjusting end of the adjustable resistor R1 are connected with the second end of the harmonic eliminator X1.
In this embodiment, the detuning circuit 4 realizes the detuning function by the cooperation of the detuner X1 and the adjustable resistor R1, and each can control the suppression effect by adjusting the effective resistance value of the adjustable resistor R1.
Further, in some embodiments, as shown in fig. 2, the detuning circuit 4 further comprises a first breaker K1 and a second breaker K2. The first end of the first circuit breaker K1 is connected with the first end of the open triangular loop, and the second end of the first circuit breaker K1 is connected with the second end of the open triangular loop through the harmonic eliminator X1; the first end of the second circuit breaker K2 is connected with the first end of the open triangular loop, and the second end of the second circuit breaker K2 is connected with the second end of the open triangular loop through the adjustable resistor R1.
In this embodiment, whether the harmonic elimination device X1 and the adjustable resistor R1 are active (for example, when the first circuit breaker K1 is closed, the harmonic elimination device X1 is active, the first circuit breaker K1 is opened, and the harmonic elimination device X1 is not active) can be controlled by controlling the opening and closing of the first circuit breaker K1 and the second circuit breaker K2, so that the suppression effect of each harmonic elimination circuit 4 can be adjusted more flexibly, and the configuration parameters of the harmonic elimination circuit 4 which are most suitable for the emergency power supply to be checked can be found. Further, the configuration parameters include whether the detuner X1 and the adjustable resistor R1 are active, the effective resistance value of the adjustable resistor R1, and the number of detuning circuits 4; the number of resonance elimination circuits 4 can be based on the number of switch cabinets configured in the real working environment of the emergency power supply to be checked.
In some embodiments, as shown in fig. 2, the resonance control circuit 3 includes a capacitance simulation unit 31 for simulating the magnitude of the ground capacitance of the emergency power supply, and a short-circuit unit 32 for controlling a ground short-circuit of one of the phase lines of the emergency power supply. The capacitance simulation unit 31 is connected with the bus, and the short-circuit unit 32 is connected with one phase line of the bus.
In this embodiment, the capacitance simulation unit 31 includes a first capacitance C1, a first control switch K3, a second capacitance C2, a second control switch K4, a third capacitance C3, and a third control switch K5. The first end of the first capacitor C1 is grounded, the second end of the first capacitor C1 is connected to an A phase line in a bus through a first control switch K3, the first end of the second capacitor C2 is grounded, the second end of the second capacitor C2 is connected to a B phase line in the bus through a second control switch K4, the first end of the third capacitor C3 is grounded, and the second end of the third capacitor C3 is connected to a C phase line in the bus through a third control switch K5.
In this embodiment, the capacitance values of the first capacitor C1, the second capacitor C2 and the third capacitor C3 may be set according to the actual capacitance to ground of the emergency power supply to be verified, and the short-circuit unit 32 simulates the ground fault of the emergency power supply to generate a ripple on the bus bar, so as to excite the ferromagnetic resonance.
In some embodiments, as shown in fig. 2, the shorting unit 32 includes a contactor KM. One end of the contactor KM is connected with one phase line of the bus, and the other end of the contactor KM is grounded. In this embodiment, the contactor KM may be controlled to be normally closed or closed at a set frequency to simulate a single-phase ground fault or a single-phase intermittent ground fault of the emergency power supply to be verified.
In some embodiments, as shown in fig. 2, the wave recording circuit 5 includes a second voltage transformer TV0 and a wave recorder 51. The input end of the second voltage transformer TV0 is connected to the bus bar and the recorder 51 is connected to the output end of the second voltage transformer TV 0. In this embodiment, the second voltage transformer TV0 is used to convert the bus voltage into a predetermined voltage according to the input voltage limit value of the recorder 51, so that the recorder 51 can normally monitor the voltage waveform of the bus, and provide waveform reference data for the staff to evaluate the ferroresonance suppression effect.
The utility model also provides a ferromagnetic resonance suppression verification device for the emergency power supply of the nuclear power plant, which comprises the ferromagnetic resonance suppression verification circuit for the emergency power supply of the nuclear power plant provided by the embodiment of the utility model.
The utility model also provides ferromagnetic resonance suppression verification equipment for the emergency power supply of the nuclear power plant, which comprises the ferromagnetic resonance suppression verification device for the emergency power supply of the nuclear power plant provided by the embodiment of the utility model.
It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A nuclear power plant emergency power source ferroresonance suppression verification circuit, comprising:
one end of the interface circuit is connected with the bus, and the other end of the interface circuit is used for being connected with an emergency power supply (1);
a plurality of first voltage transformers (2) connected with the bus;
a resonance control circuit (3) connected with the bus bar and used for being matched with each first voltage transformer (2) to control the resonance characteristic of the emergency power supply;
a plurality of resonance elimination circuits (4) which are connected with the output ends of the first voltage transformers (2) in a one-to-one correspondence manner and used for inhibiting resonance;
and the wave recording circuit (5) is connected with the bus and used for collecting waveform data of the bus.
2. The nuclear power plant emergency power supply ferromagnetic resonance suppression verification circuit according to claim 1, wherein each of the first voltage transformers (2) comprises three primary windings and three secondary windings; the secondary windings are sequentially connected in series to form an open triangular loop; each primary winding is connected with each phase line of the bus one by one, and the first end and the second end of the open triangular loop are correspondingly output ends of the first voltage transformer (2).
3. The nuclear power plant emergency power supply ferromagnetic resonance suppression verification circuit according to claim 2, wherein each of the detuning circuits (4) comprises:
the harmonic eliminator is connected with the open triangular loop in parallel;
and the first end of the adjustable resistor is connected with the first end of the harmonic eliminator, and the second end and the adjusting end of the adjustable resistor are connected with the second end of the harmonic eliminator.
4. A nuclear power plant emergency power supply ferroresonance suppression verification circuit as recited in claim 3 wherein the detuner is a microcomputer detuner.
5. A nuclear power plant emergency power supply ferroresonance suppression verification circuit according to claim 3, wherein the detuning circuit (4) further comprises:
a first circuit breaker, a first end of which is connected with a first end of the open delta loop, and a second end of which is connected with a second end of the open delta loop through the harmonic eliminator;
and the first end of the second circuit breaker is connected with the first end of the open triangular loop, and the second end of the second circuit breaker is connected with the second end of the open triangular loop through the adjustable resistor.
6. The nuclear power plant emergency power supply ferromagnetic resonance suppression verification circuit according to claim 1, wherein the resonance control circuit (3) comprises:
a capacitance simulation unit (31) for simulating the magnitude of the capacitance to ground of the emergency power supply, connected to the bus;
and the short-circuit unit (32) is used for controlling the ground short-circuit of one phase line of the emergency power supply and is connected with one phase line of the bus.
7. The nuclear power plant emergency power supply ferromagnetic resonance suppression verification circuit of claim 6, wherein the shorting unit (32) includes a contactor; one end of the contactor is connected with one phase line of the bus, and the other end of the contactor is grounded.
8. The nuclear power plant emergency power supply ferromagnetic resonance suppression verification circuit according to claim 1, wherein the wave recording circuit (5) comprises:
the input end of the second voltage transformer is connected with the bus;
and the oscillograph (51) is connected with the output end of the second voltage transformer.
9. A nuclear power plant emergency power supply ferroresonance suppression verification device, characterized by comprising the nuclear power plant emergency power supply ferroresonance suppression verification circuit according to any one of claims 1 to 8.
10. A nuclear power plant emergency power supply ferroresonance suppression verification apparatus comprising the nuclear power plant emergency power supply ferroresonance suppression verification device of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320093938.7U CN219227277U (en) | 2023-01-31 | 2023-01-31 | Ferromagnetic resonance suppression verification circuit, device and equipment for emergency power supply of nuclear power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320093938.7U CN219227277U (en) | 2023-01-31 | 2023-01-31 | Ferromagnetic resonance suppression verification circuit, device and equipment for emergency power supply of nuclear power plant |
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| CN219227277U true CN219227277U (en) | 2023-06-20 |
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| CN202320093938.7U Active CN219227277U (en) | 2023-01-31 | 2023-01-31 | Ferromagnetic resonance suppression verification circuit, device and equipment for emergency power supply of nuclear power plant |
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