CN105281300A - Arc light protection on-line monitoring method - Google Patents
Arc light protection on-line monitoring method Download PDFInfo
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- CN105281300A CN105281300A CN201510619879.2A CN201510619879A CN105281300A CN 105281300 A CN105281300 A CN 105281300A CN 201510619879 A CN201510619879 A CN 201510619879A CN 105281300 A CN105281300 A CN 105281300A
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Abstract
The invention discloses an arc light protection on-line monitoring method. An arc light protection device performs real-time arc light detection of a first transformer through arc light sensors for detecting that whether arc light exists, and timely monitors a current signal of the first transformer through a first current sensor for detecting current increment. If the arc light or current abnormity is detected, rectification, filtering and threshold comparison are performed, and after an abnormity alarm is confirmed, the arc light protection device disconnects a high voltage side breaker or a low voltage side breaker of the first transformer. A current protection unit performs real-time arc light detection of a second transformer through arc light sensors for detecting that whether arc light exists, and timely monitors a current signal of the second transformer through a second current sensor for detecting current increment. If the arc light or current abnormity is detected, rectification, filtering and threshold comparison are performed, and after an abnormity alarm is confirmed, the arc light protection device disconnects a high voltage side breaker or a low voltage side breaker of the second transformer.
Description
Technical field
The present invention relates to arc protection field, particularly relate to a kind of electric arc protection on-line monitoring method.
Background technology
In electric power system, the bus of 35kV and following electric pressure does not generally install bus protection.But, because the outlet on middle voltage bus bar is many, frequent operation, three-phase conductor wire spacing is closer with the distance of the earth, easily endangers by toy, device fabrication quality is poorer than high-tension apparatus, apparatus insulated aging and mechanical wear, service conditions is severe, and system operation conditions changes, the reasons such as artificial and operating mistake, the probability of failure of middle voltage bus bar is more much higher than high pressure, superhigh pressure bus.But for a long time, the protection of people to middle voltage bus bar is paid little attention to always, do not find advanced reasonably solution yet; therefore; the fault on bus is excised in most employing with the backup protection of larger time delay, often make fault be developed, expand, thus cause huge economic loss.In recent years, because a variety of causes mesolow switchgear is seriously burnt, what have even develops into serious fire disaster, and main transformer also increases year by year due to the accident suffering external short circuit rush of current and damage, these distribution accident treatment are improper even extendedly develops into power transmission network accident, cause great economic loss, cause the extensive concern of power department.Tracing it to its cause is because do not install middle voltage bus bar protection mostly, fails to excise fault fast and caused.So, in order to ensure the safe operation of transformer and bus switchgear, according to the requirement of rapidity of relay protection, in the urgent need to the monarch-type one electric arc protection on-line monitoring method protecting again bus and feeder line of configure dedicated middle voltage bus bar protection simultaneously.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of electric arc protection on-line monitoring method is provided.
The object of the invention is to be achieved through the following technical solutions: a kind of electric arc protection on-line monitoring method, comprises following multiple step:
S1, arc light protective device carries out real-time arc light detecting by arc photosensor to the first transformer terminal, detects whether have arc light, is monitored the current signal of the first transformer by the first current sensor in real time, detects current increment; If arc light or current anomaly detected, and compare process by rectification, filtering, threshold value, after confirming abnormal alarm, arc light protective device disconnects high-pressure side circuit breaker or the low-pressure side circuit breaker of the first transformer.
S2, current protection unit carries out real-time arc light detecting by arc photosensor to the second transformer terminal, detects whether have arc light, is monitored the current signal of the second transformer by the second current sensor in real time, detects current increment; If arc light or current anomaly detected, and compare process by rectification, filtering, threshold value, after confirming abnormal alarm, current protection unit disconnects high-pressure side circuit breaker or the low-pressure side circuit breaker of the second transformer.
S3, arc light protective device is intercomed by switch mutually with current protection unit.
S4; arc light protective device is also intercomed mutually by switch and multiple arc light expanding element, and arc light expanding element carries out arc light detecting to the monitored equipment under the monitored equipment under the first low-voltage bus bar and the second low-voltage bus bar respectively by arc photosensor.
S401, if when the monitored equipment detecting under the first low-voltage bus bar occurs that arc light is reported to the police, arc light protective device disconnects the power supply of the monitored equipment under this first low-voltage bus bar, and disconnects bus, isolates the first low-voltage bus bar and the second low-voltage bus bar.
S402, if when the monitored equipment detecting under the second low-voltage bus bar occurs that arc light is reported to the police, arc light protective device disconnects the power supply of the monitored equipment under this second low-voltage bus bar, and disconnects bus, isolates the first low-voltage bus bar and the second low-voltage bus bar.
Further, described arc light protective device also concentrates feed protection by protection for feed line unit, and arc light protective device is also by the environmental aspect residing for monitoring of working condition unit Real-Time Monitoring monitored equipment.
Further, described monitoring of working condition unit comprises Temperature Humidity Sensor, radio temperature sensor, combustible gas sensor, wireless humidity sensor, leakage current test unit and leakage current sensor.
The invention has the beneficial effects as follows: the present invention adopts distributed mode to design, be suitable as the protection of mesolow double-bus, possess attributes of network flexibly.Wherein protection for feed line unit independently can be formed and minimize protection system, and separately protected feeder line is to reduce accident interruption scope.Feeder unit also can run on centralized monitor pattern, by arc light protective device dispatching communication.Electric arc protection of the present invention adopts and detects arc light and electric current is input variable, can separately as overcurrent protection, pure arc protection, and arc light and overcurrent pair criterion are protected.Native system has that principle is simple, reliable in action is rapidly, to primary equipment without particular/special requirement, the advantage being adapted to various operational mode.
Accompanying drawing explanation
Fig. 1 is the system construction drawing of arc light protection system of the present invention;
Fig. 2 is the front panel schematic diagram of arc light protective device of the present invention;
In figure, 1-casing, 2-LCDs, 3-LED indicator light, 4-function button, 5-guide key, 6-mounting panel.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
A kind of electric arc protection on-line monitoring method, comprises following multiple step:
S1, arc light protective device carries out real-time arc light detecting by arc photosensor to the first transformer terminal, detects whether have arc light, is monitored the current signal of the first transformer by the first current sensor in real time, detects current increment; If arc light or current anomaly detected, and compare process by rectification, filtering, threshold value, after confirming abnormal alarm, arc light protective device disconnects high-pressure side circuit breaker or the low-pressure side circuit breaker of the first transformer.
S2, current protection unit carries out real-time arc light detecting by arc photosensor to the second transformer terminal, detects whether have arc light, is monitored the current signal of the second transformer by the second current sensor in real time, detects current increment; If arc light or current anomaly detected, and compare process by rectification, filtering, threshold value, after confirming abnormal alarm, current protection unit disconnects high-pressure side circuit breaker or the low-pressure side circuit breaker of the second transformer.
S3, arc light protective device is intercomed by switch mutually with current protection unit.
S4; arc light protective device is also intercomed mutually by switch and multiple arc light expanding element, and arc light expanding element carries out arc light detecting to the monitored equipment under the monitored equipment under the first low-voltage bus bar and the second low-voltage bus bar respectively by arc photosensor.
S401, if when the monitored equipment detecting under the first low-voltage bus bar occurs that arc light is reported to the police, arc light protective device disconnects the power supply of the monitored equipment under this first low-voltage bus bar, and disconnects bus, isolates the first low-voltage bus bar and the second low-voltage bus bar.
S402, if when the monitored equipment detecting under the second low-voltage bus bar occurs that arc light is reported to the police, arc light protective device disconnects the power supply of the monitored equipment under this second low-voltage bus bar, and disconnects bus, isolates the first low-voltage bus bar and the second low-voltage bus bar.
Further, described arc light protective device also concentrates feed protection by protection for feed line unit, and arc light protective device is also by the environmental aspect residing for monitoring of working condition unit Real-Time Monitoring monitored equipment.
Further, described monitoring of working condition unit comprises Temperature Humidity Sensor, radio temperature sensor, combustible gas sensor, wireless humidity sensor, leakage current test unit and leakage current sensor.
As shown in Figure 1; the real-time distributed monitoring system that Fig. 1 relies on for electric arc protection monitoring method of the present invention; comprise arc light protective device, one or more arc light expanding element, arc photosensor, current protection unit, protection for feed line unit and monitoring of working condition unit; described arc light protective device is connected with current protection unit and one or more arc light expanding element respectively by switch, and described arc light expanding element is connected with multiple arc photosensor.
Arc light protective device is the core of arc light protection system, is responsible for the information taken of system, logic analysis, breakdown judge and tripping operation and controls, manage all expanding elements simultaneously, also can carry out centralized monitor to feeder unit.
Protection for feed line unit can gather 4 road arc lights, 4 road TA current acquisition passages, and namely maximum arc light and the current protection realizing adjacent 2 feeder lines, realizes fast shut-off fault.
Arc light expanding element: easily extensible 16 road arc light acquisition channel.
Current protection unit: easily extensible 6 road TA current acquisition passage and tripping operation passage.
Arc sensor: being responsible for detecting arc light information, is digital signal by arc light intensity-conversion.
Arc light protective device described in the present invention is connected with current protection unit and one or more arc light expanding element respectively by switch, and described arc light expanding element is connected with multiple arc photosensor.
Further; the tripping operation output port of described arc light protective device is connected with the high-pressure side of the first transformer and the circuit breaker of low-pressure end and bus respectively; the current detecting end of described arc light protective device is connected by first current sensor of current line with the low-pressure side of the first transformer, and the arc light sensor input interface of described arc light protective device is also connected with multiple arc photosensor.
Further; the tripping operation output port of described current protection unit is connected with the high-pressure side of the second transformer and the circuit breaker of low-pressure end respectively, and the current detecting end of described arc light protective device is connected by second current sensor of current line with the low-pressure side of the second transformer.
Further, described first low-voltage bus bar is connected with the second low-voltage bus bar by bus, and described arc light protective device is also connected with protection for feed line unit and monitoring of working condition unit.
Further, as shown in Figure 2, described arc light protective device comprises casing 1 and internal circuit board, the main panel of described casing 1 is provided with LCDs 2, multiple LED light 3, function button 4 and guide key 5, and the rear board of described casing 1 is provided with alternating current input interface, arc light sensor input interface, tripping operation output port, clock synchronous interface, communication interface, monitor-interface, expansion interface and environmental data input interface;
Further, described LED light 3 comprises power supply indicator, run indicator, synchro light, the abnormal indicator light of device, environmental monitoring indicator light, the out-of-limit indicator light of electric current, the out-of-limit indicator light of arc light, tripping operation indicator light and maintenance indicator light.
Wherein, power supply indicator, run indicator and synchro light all can adopt green light, and when having an electricity, power supply indicator is bright, and when having program to run, run indicator is glimmered with 2Hz, when after time synchronized, synchro light is bright.
The abnormal indicator light of device, the out-of-limit indicator light of electric current, the out-of-limit indicator light of arc light and tripping operation indicator light can adopt red light, when the abnormal indicator light of the abnormal timer of device is bright, time out-of-limit when electric current is long, the out-of-limit indicator light of electric current is bright, time out-of-limit when arc light is long, the out-of-limit indicator light of arc light is bright, when after device tripping operation, tripping operation indicator light is bright.
Environmental monitoring indicator light and maintenance indicator light can adopt amber light, and when environmental monitoring is reported to the police, environmental monitoring indicator light is bright, and when device is set to maintenance, maintenance indicator light is bright.
Further, described function button 4 comprises and returns button F1, a upper function pages button F2, next function pages button F3, returns main interface buttons F4 and reset key.
Further, described guide key 5 comprises button, direction left button, the right button in direction and confirmation OK key under button on direction, direction.
Described function button 4 and/or guide key 5 are touch key-press, and described LCDs 2 is touch display screen.Further, described touch key-press and touch display screen integrate.
Further, described monitoring of working condition unit comprises Temperature Humidity Sensor, radio temperature sensor, combustible gas sensor, wireless humidity sensor, leakage current test unit and leakage current sensor.
The both sides of described front panel are also provided with mounting panel 6, and this mounting panel 6 offers multiple installation fixing hole.
Arc light protective device in the present invention possesses the collection of electric current and arc photosensor signal, tripping operation and signal fan-out capability, provides multiple indicator light, is convenient to the state that manipulation personnel understand arc light protecting device more intuitively.The present invention also provides touch display screen and touch key-press, supports large-size screen monitors display, and reduces the volume of device, reduce taking up room of device.The present invention also has abundant external interface, supports more function, can complete the monitoring of visible ray and infrared light simultaneously.
A kind of electric arc light protection method proposed by the invention, carries out arc protection to double-bus, and in order to reduce fault zone, the first low-voltage bus bar and the second low-voltage bus bar are limited by bus.Arc light protective device and current protection unit are as trip unit.Arc light protective device, when the first low-voltage bus bar fault, jumps the circuit breaker of the first transformer, when the first low-voltage bus bar and the second low-voltage bus bar fault, makes open circuit failure protection.If exceed current ration, when its district breaks down, arc light protective device trips the bus of the first low-voltage bus bar and the second low-voltage bus bar.Current protection unit jumps the circuit breaker of the second transformer, simultaneously as the open circuit failure protection of the second low-voltage bus bar.
Arc light alarm obtains from the alarm relay of arc light protective device, and activate when breaking down in region, System self-test alarm obtains from arc light protective device alarm relay.
Electric arc protection principle: according to arc light and current increment two factors, sends trip signal when arc light and current increment to be detected simultaneously.When system jam, arc optical signal is converted into the signal of telecommunication by arc photosensor, pass to arc light protective device by I/O auxiliary unit, and arc light protective device reaches initiation value by sensed current signal again, namely sends trip signal.
The present invention adopts distributed mode to design, and is suitable as the protection of mesolow double-bus, possesses attributes of network flexibly.Wherein protection for feed line unit independently can be formed and minimize protection system, and separately protected feeder line is to reduce accident interruption scope.Feeder unit also can run on centralized monitor pattern, by arc light protective device dispatching communication.Electric arc protection of the present invention adopts and detects arc light and electric current is input variable, can separately as overcurrent protection, pure arc protection, and arc light and overcurrent pair criterion are protected.Native system has that principle is simple, reliable in action is rapidly, to primary equipment without particular/special requirement, the advantage being adapted to various operational mode.
Describe in an illustrative manner according to a kind of electric arc protection on-line monitoring method of the present invention above with reference to accompanying drawing.But, it will be appreciated by those skilled in the art that a kind of electric arc protection on-line monitoring method that the invention described above is proposed, various improvement can also be made on the basis not departing from content of the present invention.Therefore, protection scope of the present invention should be determined by the content of appending claims.
Claims (3)
1. an electric arc protection on-line monitoring method, is characterized in that, comprises following multiple step:
S1, arc light protective device carries out real-time arc light detecting by arc photosensor to the first transformer terminal, detects whether have arc light, is monitored the current signal of the first transformer by the first current sensor in real time, detects current increment; If arc light or current anomaly detected, and compare process by rectification, filtering, threshold value, after confirming abnormal alarm, arc light protective device disconnects high-pressure side circuit breaker or the low-pressure side circuit breaker of the first transformer;
S2, current protection unit carries out real-time arc light detecting by arc photosensor to the second transformer terminal, detects whether have arc light, is monitored the current signal of the second transformer by the second current sensor in real time, detects current increment; If arc light or current anomaly detected, and compare process by rectification, filtering, threshold value, after confirming abnormal alarm, then current protection unit disconnects high-pressure side circuit breaker or the low-pressure side circuit breaker of the second transformer;
S3, arc light protective device is intercomed by switch mutually with current protection unit;
S4, arc light protective device is also intercomed mutually by switch and multiple arc light expanding element, and arc light expanding element carries out arc light detecting to the monitored equipment under the monitored equipment under the first low-voltage bus bar and the second low-voltage bus bar respectively by arc photosensor;
S401, if when the monitored equipment detecting under the first low-voltage bus bar occurs that arc light is reported to the police, arc light protective device disconnects the power supply of the monitored equipment under this first low-voltage bus bar, and disconnects bus, isolates the first low-voltage bus bar and the second low-voltage bus bar;
S402, if when the monitored equipment detecting under the second low-voltage bus bar occurs that arc light is reported to the police, arc light protective device disconnects the power supply of the monitored equipment under this second low-voltage bus bar, and disconnects bus, isolates the first low-voltage bus bar and the second low-voltage bus bar.
2. a kind of electric arc protection on-line monitoring method according to claim 1; it is characterized in that: described arc light protective device also concentrates feed protection by protection for feed line unit, arc light protective device is also by the environmental aspect residing for monitoring of working condition unit Real-Time Monitoring monitored equipment.
3. a kind of electric arc protection on-line monitoring method according to claim 2, is characterized in that: described monitoring of working condition unit comprises Temperature Humidity Sensor, radio temperature sensor, combustible gas sensor, wireless humidity sensor, leakage current test unit and leakage current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510619879.2A CN105281300B (en) | 2015-09-25 | 2015-09-25 | A kind of real-time distributed monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510619879.2A CN105281300B (en) | 2015-09-25 | 2015-09-25 | A kind of real-time distributed monitoring system |
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| CN105281300A true CN105281300A (en) | 2016-01-27 |
| CN105281300B CN105281300B (en) | 2018-03-30 |
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| CN201510619879.2A Active CN105281300B (en) | 2015-09-25 | 2015-09-25 | A kind of real-time distributed monitoring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752588A (en) * | 2019-11-07 | 2020-02-04 | 国网浙江淳安县供电有限公司 | Protection device based on electric arc and light detection |
| CN112751312A (en) * | 2021-01-06 | 2021-05-04 | 北京博瑞莱智能科技集团有限公司 | Novel box transformer substation and power distribution protection system thereof |
| CN115632379A (en) * | 2022-11-09 | 2023-01-20 | 安徽得润电气技术有限公司 | Multi-way detection arc light protection system for vcs isolating switch box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20130057255A1 (en) * | 2010-05-18 | 2013-03-07 | Wuhan Guoce Science & Technology Co., Ltd. | Integrated device suspended at high voltage potential for power energy metering and protection of distribution network |
| CN203589715U (en) * | 2013-11-26 | 2014-05-07 | 成都比善科技开发有限公司 | Master-control-type arc light protection system |
| CN104201655A (en) * | 2014-08-14 | 2014-12-10 | 国家电网公司 | Automatic protection system of unattended substation |
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2015
- 2015-09-25 CN CN201510619879.2A patent/CN105281300B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130057255A1 (en) * | 2010-05-18 | 2013-03-07 | Wuhan Guoce Science & Technology Co., Ltd. | Integrated device suspended at high voltage potential for power energy metering and protection of distribution network |
| CN203589715U (en) * | 2013-11-26 | 2014-05-07 | 成都比善科技开发有限公司 | Master-control-type arc light protection system |
| CN104201655A (en) * | 2014-08-14 | 2014-12-10 | 国家电网公司 | Automatic protection system of unattended substation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752588A (en) * | 2019-11-07 | 2020-02-04 | 国网浙江淳安县供电有限公司 | Protection device based on electric arc and light detection |
| CN112751312A (en) * | 2021-01-06 | 2021-05-04 | 北京博瑞莱智能科技集团有限公司 | Novel box transformer substation and power distribution protection system thereof |
| CN115632379A (en) * | 2022-11-09 | 2023-01-20 | 安徽得润电气技术有限公司 | Multi-way detection arc light protection system for vcs isolating switch box |
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| CN105281300B (en) | 2018-03-30 |
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Denomination of invention: A Real Time Distributed Monitoring System Effective date of registration: 20230818 Granted publication date: 20180330 Pledgee: Agricultural Bank of China Limited by Share Ltd. Chengdu high tech Industrial Development Zone Branch Pledgor: CHENGDU GONGBAILI AUTOMATION EQUIPMENT Co.,Ltd. Registration number: Y2023510000200 |