CN119724786A - An energy-consuming multi-column parallel arrester - Google Patents
An energy-consuming multi-column parallel arrester Download PDFInfo
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- CN119724786A CN119724786A CN202411801781.4A CN202411801781A CN119724786A CN 119724786 A CN119724786 A CN 119724786A CN 202411801781 A CN202411801781 A CN 202411801781A CN 119724786 A CN119724786 A CN 119724786A
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Abstract
本发明公开了一种耗能型多柱并联避雷器，其特征在于，包括：避雷器的多个电阻片为并联，所述避雷器包括多个电阻片的生成多列并联组合；多个并联组合中每个并联组合中的多个阻片按预设的层数进行分层串联，所述避雷器包括多个串联支路；所述避雷器的每个串联支路串联一个熔断器。本发明提出的一种耗能型多柱并联避雷器，能够降低避雷器故障率、或者短接故障零部件，从而避免跳闸或闭锁导致的系统停运，提高输电系统可靠性。
The present invention discloses an energy-consuming multi-column parallel arrester, which is characterized by comprising: a plurality of resistors of the arrester are connected in parallel, the arrester comprises a plurality of resistors generating a plurality of parallel combinations; a plurality of resistors in each parallel combination of the plurality of parallel combinations are layered and connected in series according to a preset number of layers, the arrester comprises a plurality of series branches; each series branch of the arrester is connected in series with a fuse. The energy-consuming multi-column parallel arrester proposed by the present invention can reduce the failure rate of the arrester, or short-circuit faulty components, thereby avoiding system shutdown caused by tripping or locking, and improving the reliability of the power transmission system.
Description
Technical Field
The invention relates to the technical field of direct-current transmission systems, in particular to an energy-consumption type multi-column parallel arrester.
Background
The energy-consumption type multi-column parallel arrester is widely applied to the fields of direct-current converter stations, alternating-current series compensation devices and the like, and mainly has the effects of absorbing redundant energy of a system and limiting overvoltage. However, the fault rate of the lightning arrester is always high due to the large number of parallel columns.
The traditional energy-consumption multi-column parallel arrester generally adopts a serial-parallel structure, and each column of resistor disc is directly connected with the protected equipment in parallel. The structure has the advantages of simple structure, convenient installation and low cost. But the defects are obvious, namely, the protected equipment is directly short-circuited when any column defect fails, so that the AC system trips and the DC system is blocked, and the power supply reliability of the system is seriously affected.
The lightning arrester action current monitoring is one of the main means of operation, maintenance and repair of the multi-column parallel lightning arrester, but the problems of unreasonable defect early warning criteria and poor actual effect exist for many years, and the problems of unreasonable effectiveness and correlation cannot be effectively caused.
Disclosure of Invention
The technical scheme of the invention provides an energy-consumption type multi-column parallel arrester, which aims to solve the problem that the multi-column parallel arrester is high in fault rate, trip or locking is caused, and the power transmission system is stopped.
In order to solve the above problems, the present invention provides an energy-dissipating multi-column parallel lightning arrester, which is characterized by comprising:
the lightning arrester comprises a plurality of parallel combinations of multiple resistor sheets;
the plurality of resistance sheets in each parallel combination of the plurality of parallel combinations are layered and connected in series according to the preset layer number, the lightning arrester comprises a plurality of series branches;
Each series branch of the lightning arrester is connected in series with a fuse.
Preferably, it is characterized by comprising:
the current sensor measures the action current of each series branch.
Preferably, it is characterized by comprising:
the current sensor measures the current sharing coefficient at any time when the average current is larger than 10A, and when the measured current sharing coefficient at any time is larger than the factory set value by 0.5 and lasts for 1ms, a defect early warning signal is sent out.
Preferably, it is characterized by comprising:
the current sensor measures the current sharing coefficient at any time when the average current is larger than 10A, and when the current sharing coefficient at the current peak value is larger than the factory set value 0.5, a defect early warning signal is sent.
Preferably, it is characterized by comprising:
The current sensor measures the current sharing coefficient at any time when the average current is greater than 10A, and when the current sharing coefficient at the current falling stage is greater than 5, a defect early warning signal is sent out.
Preferably, it is characterized by comprising:
and when the current sensor measures that the current waveform in any series branch action current is obviously suddenly changed or abnormal, a defect early warning signal is sent.
Preferably, it is characterized by comprising:
and after each action of the lightning arrester, measuring the insulation resistance of each layer of serial branches of the lightning arrester when the lightning arrester is not electrified for the first time, and determining that a fault element exists in the lightning arrester of the layer where one layer of serial branches is located when the insulation resistance of the serial branches is smaller than 2500MΩ.
Preferably, it is characterized by comprising:
and measuring the direct current reference voltage of each layer of serial branches of the lightning arrester, and determining that a fault element exists in the lightning arrester of the layer where the serial branches are positioned when the direct current reference voltage drop value of one layer of serial branches exceeds 5%.
Preferably, it is characterized by comprising:
The plurality of resistance sheets in each parallel combination of the plurality of parallel combinations are layered and connected in series according to a preset layer number, wherein the layer number is at least 3.
Preferably, it is characterized by comprising:
The fuse can reliably withstand normal impact currents with the duration of 50ms and the amplitude of not more than 400A;
The fuse can be reliably fused under normal impact current with the duration of 50ms and the amplitude of not less than 2000A;
After the fuse acts, the fuse can reliably withstand the normal impact voltage with the amplitude of not more than 150kV under the duration of 50 ms.
The technical scheme provides an energy-consumption type multi-column parallel arrester which is characterized by comprising a plurality of parallel resistor pieces of the arrester, wherein the arrester comprises a plurality of parallel resistor pieces which are formed into a plurality of parallel combinations, the plurality of resistor pieces in each parallel combination are connected in series in a layering manner according to the preset layer number, the arrester comprises a plurality of serial branches, and each serial branch of the arrester is connected with a fuse in series. The invention provides a lightning arrester fault rate or short circuit fault parts, so that system outage caused by tripping or locking is avoided, and the reliability of a power transmission system is improved.
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
fig. 1 is a structural diagram of an energy-consuming multi-column parallel arrester according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a structural diagram of an energy-consuming multi-column parallel arrester according to a preferred embodiment of the present invention.
As shown in fig. 1, the present invention provides an energy-dissipating multi-column parallel lightning arrester, which is characterized by comprising:
the lightning arrester comprises a plurality of parallel combinations of multiple resistor sheets;
Preferably, it comprises:
The plurality of resistance sheets in each parallel combination of the plurality of parallel combinations are layered and connected in series according to a preset layer number, wherein the layer number is at least 3.
The lightning arrester of the invention adopts a layered structure. The invention integrally adopts a layered serial-parallel structure, and is serial first and then, the number of layers m is more than or equal to 3, which is determined by reference voltage and energy, and the number of columns n is properly increased, which is determined by energy.
If a defective resistor is present, the element where the defective resistor is located is short-circuited in case of failure, and the remaining (m-1) layer takes over all the functions of the arrester. The system does not need tripping/stopping, and normally passes through overvoltage.
The design energy of the (m-1) layer row and other technical parameters are not smaller than engineering requirements, namely the energy margin in normal operation is not smaller than m/(m-1) (n-1).
The number of hot spares is large and the faulty component is removed after inspection or monitoring.
The plurality of resistance sheets in each parallel combination of the plurality of parallel combinations are layered and connected in series according to the preset layer number, the lightning arrester comprises a plurality of series branches;
Each series branch of the lightning arrester is connected in series with a fuse.
Preferably, it comprises:
the current sensor measures the action current of each series branch.
Preferably, it comprises:
the current sensor measures the current sharing coefficient at any time when the average current is larger than 10A, and when the measured current sharing coefficient at any time is larger than the factory set value by 0.5 and lasts for 1ms, a defect early warning signal is sent out.
Preferably, it comprises:
The current sensor measures the current sharing coefficient at any time when the average current is larger than 10A, and when the current sharing coefficient at the current peak value is larger than the factory set value 0.5, a defect early warning signal is sent.
Preferably, it comprises:
The current sensor measures the current sharing coefficient at any time when the average current is larger than 10A, and when the current sharing coefficient is larger than 5 in the current falling stage, a defect early warning signal is sent out.
Preferably, it comprises:
When the current sensor measures that the current waveform in any series branch action current is obviously suddenly changed or abnormal, a defect early warning signal is sent out.
The invention also provides a fault early warning criterion for detecting the action current of the multi-column parallel lightning arrester.
The invention monitors the action current of the energy-consumption multi-column parallel lightning arrester:
the current sensor can be used for measuring the action current of each element (serial branch) to improve the monitoring sensitivity, and a plurality of parallel elements cannot share one current sensor (conventionally).
The consistency of the measurement results is not more than 5%.
The current equalizing coefficient at any time when the average current is larger than 10A and above is given, and the defect early warning signal is sent when the current equalizing coefficient at any time is larger than the factory value by 0.5 and lasts for 1 ms.
The current equalizing coefficient at any time when the average current is more than 10A and above is given, and a defect early warning signal is sent when the current equalizing coefficient at the current peak value is more than 0.5 of the factory value.
And when the current equalizing coefficient in the current decreasing stage is greater than 5, a suspected defect early warning signal is sent out.
And when the current waveform of a certain column is obviously suddenly changed/abnormal, a defect early warning signal is sent out.
Preferably, it comprises:
After each action of the lightning arrester, when the lightning arrester is not electrified for the first time, measuring the insulation resistance of each layer of serial branches of the lightning arrester, and when the insulation resistance of one layer of serial branches is smaller than 2500MΩ, determining that a fault element exists in the lightning arrester of the layer where the serial branches are located.
Preferably, it comprises:
and measuring the direct current reference voltage of each layer of serial branches of the lightning arrester, and determining that a fault element exists in the lightning arrester of the layer where the serial branches are positioned when the direct current reference voltage drop value of one layer of serial branches exceeds 5%.
The invention provides a power failure overhaul method, which comprises the following steps:
after each action of the lightning arrester, routine inspection is performed to see whether the appearance of the lightning arrester is abnormal.
After each action of the lightning arrester, when the lightning arrester is not electrified for the first time, the insulation resistance of each layer of lightning arrester is measured, and when the insulation resistance is smaller than 2500MΩ, the fault element of the layer of lightning arrester can be identified.
At least one DC reference voltage test is carried out every year, and when the DC reference voltage drop value exceeds 5%, the layer of lightning arrester can be identified to have a fault element.
Preferably, it comprises:
The fuse can reliably withstand normal impact currents with the amplitude of not more than 400A for a duration of 50 ms;
The fuse can be reliably fused under normal impact current with the duration of 50ms and the amplitude of not less than 2000A;
After the fuse acts, the fuse can reliably withstand normal impact voltages with the amplitude of not more than 150kV under the duration of 50 ms.
The invention provides backup protection through fuses, one for each arrester element of the invention in series.
The fuse should be able to reliably withstand normal impact currents of a magnitude not greater than 400A for a duration of 50 ms.
The fuse should be able to reliably blow at normal impact currents of a magnitude not less than 2000A for a duration of 50 ms.
After the fuse is operated, the fuse should be capable of reliably withstanding normal surge voltages of not more than 150kV in duration of 50 ms.
The invention provides an energy-consumption type multi-column parallel arrester and an action current monitoring system thereof, which can solve the problems of tripping or locking caused by high failure rate and faults of the energy-consumption type multi-column parallel arrester, and system outage caused by the faults.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the invention can be realized by adopting various computer languages, such as object-oriented programming language Java, an transliteration script language JavaScript and the like.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
The invention has been described with reference to a few embodiments. However, as is well known to those skilled in the art, other embodiments than the above disclosed invention are equally possible within the scope of the invention, as defined by the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a/an/the [ means, component, etc. ]" are to be interpreted openly as referring to at least one instance of said means, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (10)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119724786A true CN119724786A (en) | 2025-03-28 |
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