CN220830307U - High-temperature pile direct-current debugging anti-interference loop - Google Patents
High-temperature pile direct-current debugging anti-interference loop Download PDFInfo
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- CN220830307U CN220830307U CN202322501565.5U CN202322501565U CN220830307U CN 220830307 U CN220830307 U CN 220830307U CN 202322501565 U CN202322501565 U CN 202322501565U CN 220830307 U CN220830307 U CN 220830307U
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- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 230000001052 transient effect Effects 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 5
- 230000001012 protector Effects 0.000 abstract description 17
- 238000000034 method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
The embodiment of the disclosure provides a high-temperature pile direct-current debugging anti-interference loop, which comprises a temporary distribution transformer, a distribution box outlet breaker, a rectifier, a storage battery and a direct-current bus, wherein the temporary distribution transformer, the distribution box outlet breaker, the rectifier, the storage battery and the direct-current bus are connected with the rectifier in sequence; the wiring between the distribution box outlet circuit breaker and the rectifier is grounded through a capacitor; the distribution box outlet circuit breaker is a non-leakage protection circuit breaker. According to the embodiment of the disclosure, the circuit breaker without the leakage protector is used for replacing the outlet circuit breaker of the distribution box with the leakage protector, so that the circuit breaker is prevented from being tripped due to the leakage protector misoperation during direct current debugging, and the debugging test can be normally carried out without interference.
Description
Technical Field
The embodiment of the disclosure belongs to the technical field of electricity, and particularly relates to a direct-current debugging anti-interference loop of a high-temperature reactor.
Background
A set of direct current system is arranged on a conventional island of the high-temperature gas cooled reactor, and power and control loops of important loads are supplied with power, so that the operation of important equipment in a plant is guaranteed under the condition that an alternating current power supply is lost, the equipment damage is avoided, and the economic loss is reduced.
During the debugging period of the direct current system, the power distribution system in the factory is not installed, and cannot provide alternating current, and one path of alternating current needs to be led from the temporary distribution transformer to serve as a direct current system power supply. When the outlet circuit breaker of the distribution box is closed, the capacitor in the direct current system forms a grounding loop through the grounding point, so that the leakage current protector in the distribution box is in misoperation, the outlet circuit breaker is tripped, and debugging cannot be carried out.
Disclosure of Invention
The embodiment of the disclosure aims to at least solve one of the technical problems existing in the prior art and provides a high-temperature reactor direct-current debugging anti-interference loop.
One aspect of the disclosure provides a high-temperature pile direct-current debugging anti-interference loop, which comprises a temporary distribution transformer, a distribution box outlet breaker, a rectifier, a storage battery and a direct-current bus, wherein the temporary distribution transformer, the distribution box outlet breaker, the rectifier, the storage battery and the direct-current bus are connected with the rectifier in sequence;
the two ends of the rectifier are grounded through a capacitor;
The distribution box outlet circuit breaker is a non-leakage protection circuit breaker.
Optionally, the distribution box outlet breaker is configured with overcurrent transient protection.
Optionally, a temporary load box is arranged at the downstream of the direct current bus.
Optionally, the distribution box outlet breaker is configured with overheat protection.
Optionally, the direct current bus is further provided with an incoming line breaker.
Optionally, the neutral point of the temporary distribution transformer is grounded.
Another aspect of the disclosure provides a method for configuring an outlet circuit breaker of a high-temperature pile direct-current debugging anti-interference distribution box, based on a high-temperature pile direct-current debugging loop, the loop comprises a temporary distribution transformer, a leakage protection circuit breaker, a rectifier, a storage battery and a direct-current bus which are sequentially connected, wherein the storage battery and the direct-current bus are respectively connected with the rectifier, and a wiring between the leakage protection circuit breaker and the rectifier is grounded through a capacitor; the method comprises the following steps:
Selecting the model of the circuit breaker to be configured according to the maximum current value during debugging;
Determining that the circuit breaker to be configured is not provided with leakage current protection;
and replacing the leakage protection circuit breaker with the circuit breaker to be configured.
Optionally, the selecting a model of the circuit breaker to be configured according to the maximum current value during the commissioning includes:
Respectively obtaining maximum current values during a primary charging test period and a direct current bus load test period of the storage battery;
Comparing the current value during the initial charging test of the storage battery with the maximum current value during the load test of the direct current bus, and taking the maximum current value between the two values;
Multiplying the current maximum value by a reliable coefficient to obtain a reliable current maximum value;
And selecting the type of the circuit breaker to be configured according to the reliable current maximum value.
Optionally, after the determining that the circuit breaker to be configured is not provided with leakage current protection, the method further includes:
and setting overcurrent transient protection and/or overheat protection for the circuit breaker to be configured.
Optionally, after replacing the earth leakage protection circuit breaker with the circuit breaker to be configured, the method further includes:
and measuring the insulativity of the high-temperature pile direct current debugging loop.
According to the high-temperature reactor direct-current debugging anti-interference loop, the circuit breaker without the leakage protector is used for replacing the distribution box outlet circuit breaker with the leakage protector, so that the circuit breaker is prevented from being tripped due to leakage current protection misoperation during direct-current debugging, and the debugging test can be normally carried out without interference.
Drawings
FIG. 1 is a schematic diagram of a conventional high temperature reactor DC debug loop;
fig. 2 is a schematic structural diagram of a dc debug anti-interference loop of a high temperature reactor according to an embodiment of the disclosure;
Fig. 3 is a schematic flow chart of a method for configuring an outlet circuit breaker of a high-temperature reactor direct-current debugging anti-interference distribution box according to another embodiment of the disclosure;
Fig. 4 is a flow chart illustrating a procedure for selecting a type of a circuit breaker to be configured according to another embodiment of the present disclosure.
Detailed Description
As shown in fig. 1, the conventional high-temperature reactor dc debug loop includes a temporary distribution transformer 100, a leakage protection circuit breaker 200, a rectifier 300, and a storage battery 400 and a dc bus 500 respectively connected to the rectifier 300, which are sequentially connected; both ends of the rectifier 300 are grounded via a capacitor 600. Wherein the leakage protection circuit breaker 200 includes a distribution box outlet circuit breaker 210 and a leakage current protector 220 connected in series in sequence.
When the above loop is used for dc debugging, the outlet breaker 210 of the distribution box is closed to power up the loop, and the capacitor 600 forms a grounding loop through a grounding point, so that the leakage current protector 220 acts by mistake, the outlet breaker 210 of the distribution box is tripped again, the debugging loop loses power, and the debugging cannot be performed. In order to solve the problems, the disclosure provides a high-temperature reactor direct-current debugging anti-interference loop and a distribution box outlet circuit breaker configuration method.
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various components, these components should not be limited by these terms. These terms are used to distinguish one element from another element. Accordingly, a first component discussed below could be termed a second component without departing from the teachings of the concepts of the present disclosure. As used in this disclosure, the term "and/or" includes all combinations of any of the associated listed items and one or more.
Those skilled in the art will appreciate that the drawings are schematic representations of example embodiments and that the modules or flows in the drawings are not necessarily required to practice the present disclosure, and therefore, should not be taken to limit the scope of the present disclosure.
As shown in fig. 2, an embodiment of the present disclosure provides a high temperature stack dc debug anti-interference loop, including a temporary distribution transformer 100, a distribution box outlet breaker 200, a rectifier 300, and a storage battery 400 and a dc bus 500 respectively connected with the rectifier 300, which are sequentially connected. Both ends of the rectifier 300 are grounded via a capacitor 600. The block terminal outlet circuit breaker 200 is a non-leakage protection circuit breaker.
Specifically, a circuit breaker without leakage protection is used as the distribution box outlet circuit breaker 200, replacing the leakage protection circuit breaker in the existing high-temperature stack direct current debug loop. When dc commissioning is performed, the block terminal outlet circuit breaker 200 is closed, and since it is not equipped with leakage current protection, it is not affected by the grounding of the capacitor 600, and thus can keep closed to supply power to the loop.
According to the high-temperature reactor direct-current debugging anti-interference loop, the circuit breaker without the leakage protector is used for replacing the distribution box outlet circuit breaker with the leakage protector, so that the circuit breaker is prevented from being tripped due to leakage current protection misoperation during direct-current debugging, and the debugging test can be normally carried out without interference.
The block terminal outlet circuit breaker is configured with overcurrent transient protection, for example.
Specifically, the high-temperature reactor direct current debugging comprises a storage battery initial charging test, and when the storage battery initial charging test is carried out, if a short circuit fault occurs, a large current exceeding a protection fixed value will trigger an overcurrent transient protection action, so that an outlet breaker of the distribution box is disconnected, faults are timely removed, a loop is powered off, and personnel can conveniently conduct troubleshooting on the faults.
Illustratively, as shown in fig. 2, a temporary load box is disposed downstream of the dc bus.
Specifically, a temporary load box arranged at the downstream of the direct current bus can be used for a direct current bus load test in direct current debugging of a high-temperature reactor.
In order to ensure safety during the load test of the dc bus, the distribution box outlet circuit breaker is illustratively provided with overheat protection to enable protection in the event of overload, disconnect the upstream power supply and protect downstream equipment.
Illustratively, as shown in fig. 2, the dc bus 500 is further provided with an incoming line breaker 800.
Specifically, when the high-temperature reactor direct-current debugging anti-interference loop is used for initial charging test of the storage battery, the incoming line breaker 800 can be disconnected to isolate the direct-current bus, so that the initial charging test of the storage battery is not influenced by other factors, and the test result is more accurate.
As shown in fig. 2, the neutral point of the temporary distribution transformer 100 is grounded, so that the neutral point of the temporary distribution transformer 100 is locked to be at zero potential, and when the three-phase load is unbalanced, the phase voltage unbalance caused by the displacement of the neutral point is avoided, so that the single-phase grounding of the system can be changed into single-phase short circuit, and the relay protection device can be rapidly and reliably tripped. Meanwhile, the insulation level requirement of the equipment can be reduced, so that the cost of the direct-current debugging anti-interference loop of the high-temperature reactor in the embodiment is reduced.
According to the anti-interference circuit for direct current debugging of the high-temperature reactor, the circuit breaker without the leakage protector is used for replacing an outlet circuit breaker of a distribution box with the leakage protector, and overcurrent instantaneous protection and overheat protection are arranged for the circuit breaker, so that the circuit breaker is prevented from being tripped due to misoperation of the leakage protector during direct current debugging, meanwhile, an upstream power supply can be disconnected in time during short circuit and overload, and safety of downstream equipment is protected.
As shown in fig. 3, an embodiment of the present disclosure provides a method for configuring an outlet circuit breaker of a high-temperature reactor dc debug anti-interference distribution box, based on the high-temperature reactor dc debug loop shown in fig. 1, the method includes:
and S31, selecting the type of the circuit breaker to be configured according to the maximum current value during debugging.
Specifically, as shown in fig. 4, step S31 includes the steps of:
And S41, respectively obtaining maximum current values during a primary charging test of the storage battery and a load test of the direct current bus.
Specifically, the direct current system is provided with two large loads of a storage battery and a direct current bus at the downstream, and the direct current system has maximum current under the conditions of initial charge of the storage battery and full load of the direct current bus. The initial charge test and the direct current bus load test of the storage battery are carried out separately during the debugging, and the maximum current values under the two tests are respectively obtained through theoretical analysis, experience statistics and other modes.
And S42, comparing the current value during the primary charging test of the storage battery with the maximum current value during the load test of the direct current bus, and taking the maximum current value between the two.
Specifically, the two maximum current values obtained in the step S41 are compared, and the maximum current value is obtained as the maximum current value.
And S43, multiplying the current maximum value by a reliability coefficient to obtain a reliable current maximum value.
In particular, when a fault such as a short circuit occurs in the circuit, a current value greater than the maximum value of the current may occur, and in order to enable the circuit breaker to cut off the fault current, the maximum value of the current should be used as a basis when selecting the circuit breaker, which is normally multiplied by a reliability coefficient.
And S44, selecting the type of the circuit breaker to be configured according to the reliable current maximum value.
Specifically, the circuit breaker meeting the requirements is selected according to the reliable current maximum value calculated in step S43 against the parameter information provided by the circuit breaker manufacturer.
And step S32, determining that the circuit breaker to be configured is not provided with leakage current protection.
Specifically, a circuit breaker without a leakage current protector is selected to prevent the circuit breaker from being disconnected due to a circuit formed by grounding a capacitor when the circuit breaker is used as a distribution box outlet circuit breaker to work in a high-temperature pile direct-current debugging anti-interference circuit.
And step S33, setting overcurrent transient protection and/or overheat protection for the circuit breaker to be configured.
Specifically, the overcurrent transient protection and the overheat protection can respectively act when the circuit has short-circuit faults and overload, and automatically cut off the outlet circuit breaker of the distribution box, so that the safety of the circuit is improved.
And step S34, replacing the leakage protection circuit breaker with the circuit breaker to be configured.
Specifically, in the case where the temporary distribution box is not charged, the leakage protection circuit breaker 200 in the existing high-temperature pile direct current debugging circuit as shown in fig. 1 is replaced with the circuit breaker to be configured selected and set in the above steps S31 to S33, so that the circuit breaker is used as the distribution box outlet circuit breaker.
And step S35, measuring the insulativity of the high-temperature pile direct current debugging loop.
Specifically, after replacing the circuit breaker, the loop insulation is measured, ensuring that there is no short circuit fault.
According to the configuration method for the high-temperature reactor direct-current debugging anti-interference distribution box outlet breaker, the distribution box outlet breaker which is not provided with the leakage protector is used for replacing the distribution box outlet breaker which is originally provided with the leakage protector, and overcurrent instantaneous protection and overheat protection are arranged for the breaker, so that the breaker is prevented from being tripped due to misoperation of the leakage protector in direct-current debugging, meanwhile, an upstream power supply can be disconnected in time in case of short circuit and overload, and the safety of downstream equipment is protected.
It is to be understood that the above embodiments are merely exemplary embodiments employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.
Claims (6)
1. The high-temperature pile direct-current debugging anti-interference loop is characterized by comprising a temporary distribution transformer, a distribution box outlet breaker, a rectifier, a storage battery and a direct-current bus, wherein the temporary distribution transformer, the distribution box outlet breaker, the rectifier, the storage battery and the direct-current bus are connected with the rectifier in sequence;
the two ends of the rectifier are grounded through a capacitor;
The distribution box outlet circuit breaker is a non-leakage protection circuit breaker.
2. The circuit of claim 1, wherein the block terminal outlet breaker is configured with over-current transient protection.
3. The circuit according to claim 1 or 2, characterized in that a temporary load tank is provided downstream of the dc bus.
4. The circuit of claim 3, wherein the block terminal outlet breaker is configured with overheat protection.
5. A circuit according to claim 3, characterized in that the direct current bus is further provided with an incoming line breaker.
6. The circuit of claim 1, wherein the neutral point of the temporary distribution transformer is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322501565.5U CN220830307U (en) | 2023-09-14 | 2023-09-14 | High-temperature pile direct-current debugging anti-interference loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322501565.5U CN220830307U (en) | 2023-09-14 | 2023-09-14 | High-temperature pile direct-current debugging anti-interference loop |
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| Publication Number | Publication Date |
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| CN220830307U true CN220830307U (en) | 2024-04-23 |
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| CN202322501565.5U Active CN220830307U (en) | 2023-09-14 | 2023-09-14 | High-temperature pile direct-current debugging anti-interference loop |
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- 2023-09-14 CN CN202322501565.5U patent/CN220830307U/en active Active
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