CN203932988U - A kind of low current grounding tripping operation and self-healing system - Google Patents
A kind of low current grounding tripping operation and self-healing system Download PDFInfo
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- CN203932988U CN203932988U CN201420055557.0U CN201420055557U CN203932988U CN 203932988 U CN203932988 U CN 203932988U CN 201420055557 U CN201420055557 U CN 201420055557U CN 203932988 U CN203932988 U CN 203932988U
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Abstract
The utility model relates to a kind of low current grounding tripping operation and self-healing system.This low current grounding tripping operation and self-healing system, comprise the preposition host-processor and the monitoring host computer processor that by communication module, are connected, current signal collection module, voltage signal acquisition module, node signal acquisition module, divide-shut brake signal output module are connected with preposition host-processor respectively, and failure line selection module, fault statistics analysis module, divide-shut brake control module, memory module and input/output module are connected with monitoring host computer processor respectively.This low current grounding tripping operation and self-healing system, can effectively reduce the unplanned interruption duration that manually draws road to bring, every non-fault line interruption duration is controlled in second level, guaranteed safe operation of power system, improve distribution network reliability, reduced the economic loss that has a power failure and cause.
Description
(1) technical field
The utility model relates to relay protection of power system technical field of automation, particularly a kind of low current grounding tripping operation and self-healing system.
(2) background technology
China 6～66kv power distribution network extensively adopts neutral non-effective grounding operational mode, mainly comprises isolated neutral mode and through grounding through arc mode.Distribution net work structure is complicated, and fault is multiple, especially with single phase ground fault for very, add up and show that single phase ground fault accounts for 80% of distribution network failure.During the power distribution network generation single phase ground fault of neutral non-effective grounding operational mode, can not form short-circuit loop, only the distributed capacitance by system causes very little earth fault current, therefore the low current grounding that is otherwise known as.Now the line voltage between system three-phase remains unchanged substantially, and to load, power supply can not impact, and rules regulation system can continue operation 1～2 hour by tape jam, to take treatment measures, avoids powering and interrupts suddenly user to impact.If while there is impermanency (instantaneity) earth fault, because earth current is little, ground arc major part can be from horizontal blanking, faulty line does not need tripping operation just can recover normal operation, has very high power supply reliability.
Although system can continue operation in single phase ground fault situation, during due to ground connection, healthy phases voltage to earth raises, and particularly during intermittent arc grounding fault, can produce arc overvoltage, serious harm system insulation and device security.Meanwhile, overvoltage may cause earth fault to be converted into phase fault, makes line tripping, causes power failure.Along with society is more and more higher to electric power degree of dependence, the economic loss that have a power failure (particularly unexpected fault outage) causes and also increasing to social harmful effect.
Due to the not specific requirement to the single phase ground fault line tripping time in rules, therefore in most cases by control centre, according to route selection reported result, carry out the mandatory road of drawing, general duration is in a minute level.Once route selection erroneous results, draws road by number of outgoing order, pass by journey drawing, whether dispatcher need to manual observation busbar voltage recover to judge whether separating brake circuit is faulty line after instruction issues.Non-fault line under this manual command's mode to be forced to interruption duration longer, and the whole section of the longest dozens of minutes that reaches of bus outlet La road accumulative total.
(3) summary of the invention
The utility model is in order to make up the deficiencies in the prior art, a kind of low current grounding tripping operation and self-healing system are provided, this system can effectively reduce the unplanned interruption duration that manually draws road to bring, every non-fault line interruption duration is controlled in second level, guarantee safe operation of power system, solved problems of the prior art.
The utility model is achieved by the following technical solution:
A kind of low current grounding tripping operation and self-healing system, comprise the preposition host-processor and the monitoring host computer processor that by communication module, are connected, current signal collection module, voltage signal acquisition module, node signal acquisition module, divide-shut brake signal output module are connected with preposition host-processor respectively, the input of described current signal collection module be sheathed on the zero sequence current mutual inductor that bus has under its command in outlet and be connected, the output of current signal collection module is connected with preposition host-processor; The input of described voltage signal acquisition module is connected with bus-bar potential transformer, and the output of voltage signal acquisition module is connected with preposition host-processor; The input of described node signal acquisition module be located at the switch cubicle node signal loop that bus has under its command in outlet and be connected, the output of node signal acquisition module is connected with preposition host-processor; The input of described divide-shut brake signal output module is connected with preposition host-processor, and the output of divide-shut brake signal output module is connected respectively with switch cubicle divide-shut brake signal circuit; Failure line selection module, fault statistics analysis module, divide-shut brake control module, memory module and input/output module are connected with monitoring host computer processor respectively.
The beneficial effects of the utility model are: this low current grounding tripping operation and self-healing system, can effectively reduce the unplanned interruption duration that manually draws road to bring, every non-fault line interruption duration is controlled in second level, guaranteed safe operation of power system, improve distribution network reliability, reduced the economic loss that has a power failure and cause.
(4) accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is structural principle block diagram of the present utility model;
(5) embodiment
For clearly demonstrating the technical characterstic of this programme, below by embodiment, and in conjunction with its accompanying drawing, the utility model is elaborated.
As shown in fig. 1, this embodiment comprises preposition host-processor and the monitoring host computer processor being connected by communication module, current signal collection module, voltage signal acquisition module, node signal acquisition module, divide-shut brake signal output module are connected with preposition host-processor respectively, the input of described current signal collection module be sheathed on the zero sequence current mutual inductor that bus has under its command in outlet and be connected, the output of current signal collection module is connected with preposition host-processor; The input of described voltage signal acquisition module is connected with bus-bar potential transformer, and the output of voltage signal acquisition module is connected with preposition host-processor; The input of described node signal acquisition module be located at the switch cubicle node signal loop that bus has under its command in outlet and be connected, the output of node signal acquisition module is connected with preposition host-processor; The input of described divide-shut brake signal output module is connected with preposition host-processor, and the output of divide-shut brake signal output module is connected respectively with switch cubicle divide-shut brake signal circuit; Failure line selection module, fault statistics analysis module, divide-shut brake control module, memory module and input/output module are connected with monitoring host computer processor respectively.
During operation, current signal collection module gathers bus by zero sequence current mutual inductor and has the zero sequence current signal of outlet under its command and zero sequence current signal is sent to preposition host-processor, voltage signal acquisition module is gathered the voltage signal of bus and voltage signal is sent to preposition host-processor by voltage transformer, node signal acquisition module gathers the switch cubicle node signal of switch cubicle and switch cubicle node signal is sent to preposition host-processor, switch cubicle node signal comprises that the separating brake that bus has outlet switch cabinet breaker under its command often opens node signal and the normally closed node signal that closes a floodgate, then preposition host-processor is by the zero sequence current signal receiving, voltage signal and switch cubicle node signal are transported to monitoring host computer processor by communication module, the zero sequence current signal that monitoring host computer processor sends over according to preposition host-processor, voltage signal and switch cubicle node signal, call failure line selection module and carry out faulty line selection, and failure judgement type is busbar fault, system interference or earth fault, bus jurisdiction outlet earth fault if, failure line selection module belongs to transient earthing fault or continuous earth fault according to time period threshold failure judgement type, if transient earthing fault, failure line selection module is sent to monitoring host computer processor by transient earthing fault-signal, monitoring host computer processor is stored failure logging again in memory module, if continuous earth fault, failure line selection module is sent to monitoring host computer processor by continuous earth fault-signal, monitoring host computer processor sends to divide-shut brake control module by continuous earth fault-signal again, separating brake instruction is processed and sent to divide-shut brake control module to monitoring host computer processor after receiving signal, monitoring host computer processor is transferred to preposition host-processor by separating brake instruction through communication module, preposition host-processor sends to divide-shut brake signal output module by separating brake instruction, the instruction of divide-shut brake signal output module output separating brake is to the switch cubicle of faulty line, and faulty line is carried out to sub-switching operation.After faulty line switch cubicle separating brake, by voltage signal acquisition module, gather bus voltage signal, by node signal acquisition module, gather the switch cubicle node signal of each switch cubicle, voltage signal acquisition module and node signal acquisition module are sent to preposition host-processor by voltage signal and switch cubicle node signal respectively, preposition host-processor is sent to monitoring host computer processor through communication module by voltage signal and switch cubicle node signal again, and whether monitoring host computer processor disappears according to voltage signal and switch cubicle node signal failure judgement again.If fault disappears, monitoring host computer processor is is reported and submitted route selection result and is combined from backstage and control centre; If fault does not disappear, will start divide-shut brake signaling module this circuit will be closed a floodgate; And start fault statistics analysis module simultaneously.Fault statistics analysis module, according to historical record, sorts All other routes failure rate, and according to failure rate from high in the end order divide-shut brake.Find after faulty line, report and combine from backstage and control centre; If after all circuit divide-shut brakes, fault still exists, be judged to be busbar fault, and report and combine from backstage and control centre.
The utility model does not describe part in detail, is those skilled in the art of the present technique's known technology.Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (1)
1. a low current grounding trips and self-healing system, it is characterized in that: comprise the preposition host-processor and the monitoring host computer processor that by communication module, are connected, current signal collection module, voltage signal acquisition module, node signal acquisition module, divide-shut brake signal output module are connected with preposition host-processor respectively, the input of described current signal collection module be sheathed on the zero sequence current mutual inductor that bus has under its command in outlet and be connected, the output of current signal collection module is connected with preposition host-processor; The input of described voltage signal acquisition module is connected with bus-bar potential transformer, and the output of voltage signal acquisition module is connected with preposition host-processor; The input of described node signal acquisition module be located at the switch cubicle node signal loop that bus has under its command in outlet and be connected, the output of node signal acquisition module is connected with preposition host-processor; The input of described divide-shut brake signal output module is connected with preposition host-processor, and the output of divide-shut brake signal output module is connected respectively with switch cubicle divide-shut brake signal circuit; Failure line selection module, fault statistics analysis module, divide-shut brake control module, memory module and input/output module are connected with monitoring host computer processor respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420055557.0U CN203932988U (en) | 2014-01-28 | 2014-01-28 | A kind of low current grounding tripping operation and self-healing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420055557.0U CN203932988U (en) | 2014-01-28 | 2014-01-28 | A kind of low current grounding tripping operation and self-healing system |
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| CN203932988U true CN203932988U (en) | 2014-11-05 |
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| CN201420055557.0U Expired - Fee Related CN203932988U (en) | 2014-01-28 | 2014-01-28 | A kind of low current grounding tripping operation and self-healing system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898018A (en) * | 2015-05-05 | 2015-09-09 | 国家电网公司 | Automatic pull trial detection and control device for single-phase earth fault of power distribution network |
| CN105529705A (en) * | 2016-02-23 | 2016-04-27 | 林福 | Self-healing control system for urban distribution network |
| CN111679653A (en) * | 2020-06-15 | 2020-09-18 | 中国南方电网有限责任公司超高压输电公司昆明局 | Intelligent fault recording device and direct-current field control loop fault positioning method |
| CN113514773A (en) * | 2021-04-23 | 2021-10-19 | 国网新疆电力有限公司阿克苏供电公司 | Insulation monitoring system and monitoring method for standby instantaneous ground fault of direct-current power supply system |
-
2014
- 2014-01-28 CN CN201420055557.0U patent/CN203932988U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898018A (en) * | 2015-05-05 | 2015-09-09 | 国家电网公司 | Automatic pull trial detection and control device for single-phase earth fault of power distribution network |
| CN104898018B (en) * | 2015-05-05 | 2017-10-20 | 国家电网公司 | One-phase earthing failure in electric distribution network tries to draw Detection ＆ Controling device automatically |
| CN105529705A (en) * | 2016-02-23 | 2016-04-27 | 林福 | Self-healing control system for urban distribution network |
| CN111679653A (en) * | 2020-06-15 | 2020-09-18 | 中国南方电网有限责任公司超高压输电公司昆明局 | Intelligent fault recording device and direct-current field control loop fault positioning method |
| CN113514773A (en) * | 2021-04-23 | 2021-10-19 | 国网新疆电力有限公司阿克苏供电公司 | Insulation monitoring system and monitoring method for standby instantaneous ground fault of direct-current power supply system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20220128 |