CN105092946A - Three-phase circuit overvoltage monitoring system - Google Patents
Three-phase circuit overvoltage monitoring system Download PDFInfo
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- CN105092946A CN105092946A CN201510588514.8A CN201510588514A CN105092946A CN 105092946 A CN105092946 A CN 105092946A CN 201510588514 A CN201510588514 A CN 201510588514A CN 105092946 A CN105092946 A CN 105092946A
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Abstract
The invention discloses a three-phase circuit overvoltage monitoring system. The three-phase circuit overvoltage monitoring system comprises a front monitoring station, a front switch and multiple front monitoring equipment, wherein input ends of the front monitoring equipment are respectively connected with a three-phase bus in corresponding segments, output ends of all the front monitoring equipment are connected with the front switch, an output end of the front switch is connected with the front monitoring station, the front monitoring equipment comprises capacitance voltage division modules and monitoring devices, input ends of the capacitance voltage division modules are connected with the three-phase buses, output ends of the capacitance voltage division modules are connected with the monitoring devices, and output ends of the monitoring devices are connected with the front switch. The three-phase circuit overvoltage monitoring system employs capacitance voltage division devices and the corresponding monitoring devices to carry out voltage data acquisition, voltage withstand intensity is large, breakdown is not easy to occur, frequency response bandwidth can satisfy requirements of real transmission lightning wave frequency spectrums, original data has strong authenticity, thunder overvoltage data can be accurately acquired, and the monitoring effect is better.
Description
Technical field
The present invention relates to a kind of over-voltage monitoring system of three-phase circuit.
Background technology
Superpotential is the main external cause causing insulation of electrical installation damage and equipment failure, especially lightning surge, because its amplitude is far above the rating operating voltage of electrical network, voltage transformer (VT) can be caused, lightning arrester, the apparatus insulated level such as transformer reduces, device damage, even explode, to there is the power equipment of winding as transformer, the harm of reactor minor insulation is particularly outstanding, and large-scale power outage may be caused, cause larger economic loss and social influence, Obtaining Accurate over-voltage waveform, can be the electrical equipment malfunction analysis that superpotential causes and foundation is provided, simultaneously, over-voltage waveform and amplitude are also the designs of Substation Electric Equipment Insulation Coordination, the important evidence of switching overvoltage braking measure and lightening protection installation configuration optimization.
Three-phase circuit is a kind of special alternating circuit, is made up of three-phase supply, threephase load and three phase line; The power supply mode of electric system electrical energy production in the world mostly adopts three-phase system, therefore carries out over-voltage monitoring to three-phase circuit and just seems particularly important.
Generally adopt voltage transformer (VT) to the monitoring of three wire circuit at present, its bandwidth is difficult to meet the true requirement transmitting lightning wave frequency spectrum, so its monitoring effect is generally bad.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of over-voltage monitoring system of three-phase circuit is provided, capacitive divider and corresponding monitoring device is adopted to carry out voltage data collection, its compressive resistance is large, not easily puncture, frequency response bandwidth can meet the true requirement transmitting lightning wave frequency spectrum, and the authenticity of raw data is strong, can accurate acquisition lightning surge data, monitoring effect is better.
The object of the invention is to be achieved through the following technical solutions: a kind of over-voltage monitoring system of three-phase circuit, comprises monitoring station, front end, front end switch and multiple front ends monitoring equipment; The input end of described front end monitoring equipment is connected with corresponding road section three-phase bus respectively; The output terminal of all front ends monitoring equipment is all connected with front end switch, and the output terminal of front end switch is connected with monitoring station, front end;
Described front end monitoring equipment comprises capacitance partial pressure module and monitoring device; The input end of capacitance partial pressure module is connected with three-phase bus, and the output terminal of capacitance partial pressure module is connected with monitoring device, and the output terminal of monitoring device is connected with front end switch.
Described monitoring station, front end is used for comprising waveform display module, overvoltage analysis module, cache module, memory module, over voltage alarm module and statistical module; The input end of waveform display module is connected with front end switch, and the output terminal of waveform display module is connected with overvoltage analysis module; Overvoltage analysis module is connected with cache module, over voltage alarm model calling, statistical module and memory module respectively;
Voltage threshold is previously stored with in described memory module;
The voltage data that described waveform display module is used for monitoring device to collect is converted into waveform and shows, and can comprise oscillograph, the staff of monitoring station, front end can see voltage waveform data by waveform display module;
Described overvoltage analysis module is used for analyzing the voltage data collected, and judges whether it exceedes the voltage threshold prestored in memory module;
Described cache module is used for carrying out buffer memory to the waveform of voltage data;
Described over voltage alarm module is used for when the voltage collected exceedes the voltage threshold prestored, and reports to the police;
Described statistical module is used for when the voltage collected exceedes the voltage threshold prestored, the Wave data of recorded magnitude of voltage and overvoltage totally 50 cycles before and after occurring, and is stored in memory module by the data of record;
Further, can store multiple threshold value in a storage module in advance, different process, when overvoltage value reaches different threshold values, is carried out in monitoring station, front end, as warning, information upload, transmission note, forced cut-out etc.
Described capacitance partial pressure module comprises three capacitive dividers, and the input end of three capacitive dividers is connected with three of three-phase bus respectively, and the output terminal of capacitive divider is all connected with monitoring device.
The over-voltage monitoring system of described a kind of three-phase circuit, also comprises monitoring master station and master station's switch, and monitoring station, front end is connected with master station switch; Master station's switch is connected with monitoring master station; Monitoring master station can memory module stores in monitoring station, real time inspection front end data (also can be that the data stored in memory module are sent to master station by front end monitoring station in real time), real-time analysis is carried out to superpotential data, and sends the corresponding command according to analysis result forward end monitoring station; Described monitoring master station can also send the order of voltage threshold in change memory module to overvoltage analysis module by data dispatch net.
Further, after the staff of monitoring master station checks the data stored in monitoring station, front end, manual analysis can be carried out to data, in conjunction with the superpotential case occurred, draw correct counte-rplan, and forward end monitoring station sends order accordingly, has front-end detection station automatically to process or carries out respective handling by the staff of monitoring station, front end.
Further, monitoring master station is connected with monitoring station, distributed multiple front end, just can form a distributed over-voltage monitoring system, only need the over-voltage condition just can monitoring each front end monitoring station in detection master station, and issue an order as required.
The output terminal of described monitoring device is connected with front end switch by optical fiber.
The invention has the beneficial effects as follows: (1) adopts capacitive divider and corresponding monitoring device to carry out voltage data collection, capacitive divider and corresponding monitoring device is adopted to carry out voltage data collection, its compressive resistance is large, not easily puncture, frequency response bandwidth can meet the true requirement transmitting lightning wave frequency spectrum, the authenticity of raw data is strong, can accurate acquisition lightning surge data, and monitoring effect is better.
(2) pass through Optical Fiber Transmission data between monitoring device and front end switch, speed is fast, and reliability is high.
(3) staff of monitoring station, front end can see the waveform of current voltage intuitively by waveform display module, facilitates staff to carry out Real-Time Monitoring.
(4) there is statistical module, when overvoltage value reaches or exceed voltage threshold, during except recorded magnitude of voltage, can also the Wave data of recorded Hair Fixer totally 50 cycles afterwards before death, and the data of record are stored into memory module, provide foundation to follow-up treatment and analysis.
(5) Wave data of statistical module totally 50 cycles before and after only useful overvoltage value and overvoltage being occurred, avoids the huge of data, decreases the complexity of data, and the data also facilitated between the storage of data and follow-up and master station are transmitted.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention;
Fig. 2 be capacitance partial pressure module with the connection diagram of three-phase bus and pick-up unit.
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.
As shown in Figure 1, a kind of over-voltage monitoring system of three-phase circuit, comprises monitoring station, front end, front end switch and multiple front ends monitoring equipment; The input end of described front end monitoring equipment is connected with corresponding road section three-phase bus respectively; The output terminal of all front ends monitoring equipment is all connected with front end switch, and the output terminal of front end switch is connected with monitoring station, front end;
As shown in Figure 2, described front end monitoring equipment comprises capacitance partial pressure module and monitoring device; The input end of capacitance partial pressure module is connected with three-phase bus, and the output terminal of capacitance partial pressure module is connected with monitoring device, and the output terminal of monitoring device is connected with front end switch.
Described monitoring station, front end is used for comprising waveform display module, overvoltage analysis module, cache module, memory module, over voltage alarm module and statistical module; The input end of waveform display module is connected with front end switch, and the output terminal of waveform display module is connected with overvoltage analysis module; Overvoltage analysis module is connected with cache module, over voltage alarm model calling, statistical module and memory module respectively;
Voltage threshold is previously stored with in described memory module;
The voltage data that described waveform display module is used for monitoring device to collect is converted into waveform and shows, and can comprise is oscillograph, and the staff of monitoring station, front end can see voltage waveform data by waveform display module;
Described overvoltage analysis module is used for analyzing the voltage data collected, and judges whether it exceedes the voltage threshold prestored in memory module;
Described cache module is used for carrying out buffer memory to the waveform of voltage data;
Described over voltage alarm module is used for when the voltage collected exceedes the voltage threshold prestored, and reports to the police;
Described statistical module is used for when the voltage collected exceedes the voltage threshold prestored, the Wave data of recorded magnitude of voltage and overvoltage totally 50 cycles before and after occurring, and is stored in memory module by the data of record;
Described capacitance partial pressure module comprises three capacitive dividers, the input end of three capacitive dividers is connected with three of three-phase bus respectively, the output terminal of capacitive divider is all connected with monitoring device, concrete, capacitive divider voltage of the present invention can reach 1000kV, and frequency response bandwidth is the highest realizes 30MHz.
As shown in Figure 2, three-phase bus comprises A phase, B phase and C phase are (in practice, the line that the A of three-phase bus is corresponding is yellow, the corresponding line of B is green, the corresponding line of C is red, and zero line is black), three capacitive dividers are respectively capacitive divider one, capacitive divider two and capacitive divider three; The input end of capacitive divider one is connected with the A of three-phase bus, and the output terminal of capacitive divider one is connected with monitoring device; The input end of capacitive divider two is connected with the B of three-phase bus, and the output terminal of capacitive divider two is connected with monitoring device; The input end of capacitive divider three is connected with the C of three-phase bus, and the output terminal of capacitive divider three is connected with monitoring device.
The over-voltage monitoring system of described a kind of three-phase circuit, also comprises monitoring master station and master station's switch, and monitoring station, front end is connected with master station switch; Master station's switch is connected with monitoring master station; Monitoring master station can memory module stores in monitoring station, real time inspection front end data, carry out real-time analysis, and send the corresponding command according to analysis result forward end monitoring station to superpotential data; Described monitoring master station can also send the order of voltage threshold in change memory module to overvoltage analysis module by data dispatch net.
Further, after the staff of monitoring master station checks the data stored in monitoring station, front end, manual analysis can be carried out to data, in conjunction with the superpotential case occurred, draw correct counte-rplan, and forward end monitoring station sends order accordingly, has front-end detection station automatically to process or carries out respective handling by the staff of monitoring station, front end.
Further, monitoring master station is connected with monitoring station, distributed multiple front end, just can form a distributed over-voltage monitoring system, only need the over-voltage condition just can monitoring each front end monitoring station in detection master station, and issue an order as required.
The output terminal of described monitoring device is connected with front end switch by optical fiber.
Claims (5)
1. an over-voltage monitoring system for three-phase circuit, is characterized in that: comprise monitoring station, front end, front end switch and multiple front ends monitoring equipment; The input end of described front end monitoring equipment is connected with corresponding road section three-phase bus respectively; The output terminal of all front ends monitoring equipment is all connected with front end switch, and the output terminal of front end switch is connected with monitoring station, front end;
Described front end monitoring equipment comprises capacitance partial pressure module and monitoring device; The input end of capacitance partial pressure module is connected with three-phase bus, and the output terminal of capacitance partial pressure module is connected with monitoring device, and the output terminal of monitoring device is connected with front end switch.
2. the over-voltage monitoring system of a kind of three-phase circuit according to claim 1, is characterized in that: described monitoring station, front end is used for comprising waveform display module, overvoltage analysis module, cache module, memory module, over voltage alarm module and statistical module; The input end of waveform display module is connected with front end switch, and the output terminal of waveform display module is connected with overvoltage analysis module; Overvoltage analysis module is connected with cache module, over voltage alarm model calling, statistical module and memory module respectively;
Voltage threshold is previously stored with in described memory module;
The voltage data that described waveform display module is used for monitoring device to collect is converted into waveform and shows;
Described overvoltage analysis module is used for analyzing the voltage data collected, and judges whether it exceedes the voltage threshold prestored in memory module;
Described cache module is used for carrying out buffer memory to the waveform of voltage data;
Described over voltage alarm module is used for when the voltage collected exceedes the voltage threshold prestored, and reports to the police;
Described statistical module is used for when the voltage collected exceedes the voltage threshold prestored, the Wave data of recorded magnitude of voltage and overvoltage totally 50 cycles before and after occurring, and the data of record is stored in memory module.
3. the over-voltage monitoring system of a kind of three-phase circuit according to claim 1, it is characterized in that: described capacitance partial pressure module comprises three capacitive dividers, the input end of three capacitive dividers is connected with three of three-phase bus respectively, and the output terminal of capacitive divider is all connected with monitoring device.
4. the over-voltage monitoring system of a kind of three-phase circuit according to claim 1, is characterized in that: also comprise monitoring master station and master station's switch, and monitoring station, front end is connected with master station switch; Master station's switch is connected with monitoring master station; Monitoring master station can memory module stores in monitoring station, real time inspection front end data, carry out real-time analysis, and send the corresponding command according to analysis result forward end monitoring station to superpotential data; Described monitoring master station can also send the order of voltage threshold in change memory module to overvoltage analysis module by data dispatch net.
5. the over-voltage monitoring system of a kind of three-phase circuit according to claim 1, is characterized in that: the output terminal of described monitoring device is connected with front end switch by optical fiber.
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| CN201510588514.8A CN105092946A (en) | 2015-09-16 | 2015-09-16 | Three-phase circuit overvoltage monitoring system |
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| CN201510588514.8A CN105092946A (en) | 2015-09-16 | 2015-09-16 | Three-phase circuit overvoltage monitoring system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092947A (en) * | 2015-09-16 | 2015-11-25 | 成都比善科技开发有限公司 | Three-phase circuit overvoltage monitoring system and method thereof |
| CN111103454A (en) * | 2019-12-25 | 2020-05-05 | 深圳供电局有限公司 | Overvoltage monitoring method |
| CN111722061A (en) * | 2020-07-01 | 2020-09-29 | 上海恒敬电力科技有限公司 | But early warning device of remote monitoring power distribution station overvoltage operation |
| CN113639784A (en) * | 2020-04-27 | 2021-11-12 | 安徽帕维尔智能技术有限公司 | Intelligent electric wire netting terminal monitoring devices |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105092947A (en) * | 2015-09-16 | 2015-11-25 | 成都比善科技开发有限公司 | Three-phase circuit overvoltage monitoring system and method thereof |
| CN105092947B (en) * | 2015-09-16 | 2019-02-26 | 成都比善科技开发有限公司 | A kind of over-voltage monitoring system and method for three-phase circuit |
| CN111103454A (en) * | 2019-12-25 | 2020-05-05 | 深圳供电局有限公司 | Overvoltage monitoring method |
| CN113639784A (en) * | 2020-04-27 | 2021-11-12 | 安徽帕维尔智能技术有限公司 | Intelligent electric wire netting terminal monitoring devices |
| CN111722061A (en) * | 2020-07-01 | 2020-09-29 | 上海恒敬电力科技有限公司 | But early warning device of remote monitoring power distribution station overvoltage operation |
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