CN105223433A - Metal oxide arrester on-line monitoring system - Google Patents
Metal oxide arrester on-line monitoring system Download PDFInfo
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- CN105223433A CN105223433A CN201510537559.2A CN201510537559A CN105223433A CN 105223433 A CN105223433 A CN 105223433A CN 201510537559 A CN201510537559 A CN 201510537559A CN 105223433 A CN105223433 A CN 105223433A
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- circuit
- monitoring system
- metal oxide
- module
- line monitoring
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Abstract
The present invention relates to a kind of metal oxide arrester on-line monitoring system, comprise data acquisition module, data processing module and data transmitting module, the data of collection are sent to data processing module by data transmitting module by data acquisition module, the ruuning situation of data processing module to equipment makes assessment and diagnosis, and described data acquisition module comprises leakage current sensor.Gathered the Leakage Current of lightning arrester by leakage current sensor, carry out the monitoring of lightning arrester operation conditions.
Description
Technical field
The invention belongs to technical field of electric system protection, relate to a kind of metal oxide arrester, be specifically related to a kind of metal oxide arrester on-line monitoring system.
Background technology
Lightning arrester is the visual plant in power transmission and transformation system.Because lightning arrester can be struck by lightning or superpotential limit superpotential at power transmission and transformation system, and release by the energy be struck by lightning or superpotential produces, play protection electrical equipment from superpotential harm.And after voltage resume is normal, lightning arrester self can recover normal again thereupon.Along with lightning arrester runs for a long time, its resistor disc can produce degradation phenomena because directly bearing power-frequency voltage, or dysplasia, poorly sealed etc. causes internal wetted, thus cause leakage current sharply to increase (particularly current in resistance property), resistor disc temperature is caused to rise and thermal breakdown occurs, even blast, so seem particularly important to the monitoring of lightning arrester.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of metal oxide arrester on-line monitoring system, being gathered the Leakage Current of lightning arrester by leakage current sensor, carrying out the monitoring of lightning arrester operation conditions.
Technical scheme of the present invention is: a kind of metal oxide arrester on-line monitoring system, comprise data acquisition module, data processing module and data transmitting module, the data of collection are sent to data processing module by data transmitting module by data acquisition module, the ruuning situation of data processing module to equipment makes assessment and diagnosis, and described data acquisition module comprises leakage current sensor.Described data processing module adopts LM3S1138 microcontroller.Described data transmitting module adopts optical fiber load mode.Described leakage current sensor comprises total current loop input interface, automatic electricity getting source circuit, leakage current sample circuit, power frequency change-over circuit, electronic switching circuit and electro-optical conversion circuit, automatic electricity getting source circuit access lightning arrester output terminal, the power supply of power frequency change-over circuit is connected to automatic electricity getting source circuit out-put supply, the sample resistance of leakage current sample circuit is serially connected in current return, output is connected to power frequency change-over circuit, the output terminal of power frequency change-over circuit, to electronic switching circuit, goes to control electrical to optical converter circuit.Described automatic electricity getting source circuit and lightning arrester output terminal IN+ and IN-are in series, and automatic electricity getting source circuit holds the voltage stabilizing diode D1 of a 8.2V in parallel at input end IN+ and IN-.Described power frequency change-over circuit comprises accurate integrating circuit and voltage comparator circuit, and the power supply of voltage comparator circuit connects the out-put supply of automatic electricity getting source circuit; The output terminal of voltage comparator, to electronic switching circuit, goes to control electrical to optical converter circuit.The input signal of accurate integrating circuit is lightning arrester leakance, and the output voltage of accurate integrating circuit and the pass of lightning arrester leakance are integration.The anti-phase input termination power supply 2.5V of described voltage comparator, in-phase input end connects the output of accurate integrating circuit.Described voltage stabilizing diode D1 two ends also meet an inductance L 1 and diode D3, provide by inductance path of releasing.Described data acquisition module also comprises Temperature Humidity Sensor module.Described monitoring system also comprises power module, and power module is the power of alterating and direct current of data processing module and Temperature Humidity Sensor module for power supply, Temperature Humidity Sensor module employing ± 15V, and data processing module adopts the direct supply of+5V.
The present invention has following good effect: the Leakage Current being gathered lightning arrester by leakage current sensor, carries out the monitoring of lightning arrester operation conditions.
Accompanying drawing explanation
Fig. 1 is the leakage current sensor structural drawing of the specific embodiment of the invention.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is as the effect of the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part and principle of work, manufacturing process and operation using method etc., be described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technical scheme.
Arrester on-line monitoring system of the present invention comprises power module, data acquisition module, data processing module, data transmitting module, Temperature Humidity Sensor module, as Fig. 1, for system construction drawing of the present invention, data acquisition module is leading portion data acquisition unit of the present invention, the parameter gathered is needed to have lightning arrester leakance and number of lightning strokes etc., therefore, data acquisition module of the present invention adopts leakage current sensor.The data of collection are sent to data processing module by data transmitting module by data acquisition module, and data processing module is data processing centre (DPC) of the present invention, make assessment and diagnosis etc. to the ruuning situation of equipment.Be high-tension electricity due to what lightning arrester ran, monitoring system of the present invention needs low-voltage power supply, and power module is above-mentioned data processing module and Temperature Humidity Sensor module for power supply.Concrete, the power of alterating and direct current of Temperature Humidity Sensor module employings ± 15V, the direct supply of data processing module employing+5V, data processing module is integrated with RTC clock, and power module provides the linear stabilized power supply of+3.3V for RTC clock.
The data processing module of on-line monitoring system of the present invention adopts LM3S1138 microcontroller, the sleep block that LM3S1138 microcontroller has battery back up can make LM3S1138 power down effectively, in long device quits work process, allow device enter the state of a low-power consumption, this is applicable to the application that requirement reduces power consumption to greatest extent very much.LM31138 processing speed can reach 50Hz, and processing speed is very fast, can meet the data handling requirements of arrester on-line monitoring system.
Traditional data mode has the field bus technique and wireless communication technique etc. of RS-485, the present invention adopts Optical Fiber Transmission data, leakage current on lightning arrester can be converted to the light pulse signal that frequency and leakage current are directly proportional by leakage current sensor accurately, by optical fiber, data are sent to the photoelectricity transmitter of data processing centre (DPC) front end again, again the electric signal of photoelectricity transmitter is processed, then by interface to data processing centre (DPC).Optical Fiber Transmission has the advantage of long transmission distance.
Leakage current sensor comprises total current loop input interface, automatic electricity getting source circuit, leakage current sample circuit, power frequency change-over circuit, electronic switch and electro-optical conversion circuit.Automatic electricity getting source circuit access lightning arrester output terminal, the power supply of power frequency change-over circuit is connected to automatic electricity getting source circuit out-put supply, the sample resistance of leakage current sample circuit is serially connected in current return, output is connected to power frequency change-over circuit, the output terminal of power frequency change-over circuit, to electronic switching circuit, goes to control electrical to optical converter circuit.
Automatic electricity getting source circuit is made up of accurate stabilivolt, resistance and electric capacity, and it and input end IN+ and IN-are in series, and are namely serially connected in current return.IN-holds ground connection, the voltage stabilizing diode D1 of a 8.2V in parallel is held at input end IN+ and IN-, object damages circuit in order to generation overvoltage when preventing from being struck by lightning and overcurrent, utilizes the accurate stabilivolt of two panels Micro Energy Lose to be connected in total current loop, as lightning arrester output terminal IN
+and IN
-between when there is no an electric current, accurate stabilivolt does not work; Output terminal V
o1and V
o2output is zero; As input end IN
+and IN
-between when having an electric current, accurate stabilivolt work; Output terminal V
o1voltage be+5V, output terminal V
o2voltage be+2.5V.When loop current is greater than 10 μ A, the voltage stabilization at accurate stabilivolt two ends is at+2.5V.
Power frequency change-over circuit is made up of accurate integrating circuit and voltage comparator circuit, and accurate integrating circuit is made up of integrated operational amplifier, precision resistance and precision capacitance.
The sample resistance of leakage current sample circuit is serially connected in current return; The power supply of voltage comparator circuit connects the out-put supply of automatic electricity getting source circuit; The output terminal of voltage comparator, to electronic switching circuit, goes to control electrical to optical converter circuit.The input signal of accurate integrating circuit is lightning arrester leakance, and the output voltage of accurate integrating circuit and the pass of lightning arrester leakance are integration.Leakage current is less, and integral time is longer; Leakage current is larger, and integral time is shorter.
The anti-phase input termination power supply 2.5V of voltage comparator, in-phase input end connects the output of accurate integrating circuit.When the output pin voltage of accurate integrating circuit is less than 2.5V, the output of voltage comparator is 0V, when the output voltage of accurate integrating circuit reaches 2.5V, voltage comparator overturns, the output of voltage comparator is 5V, and electronic switch is opened, and luminotron must conduct luminescence.And be 5V once the output of voltage comparator, because electric capacity C6 connects into positive feedback, so accelerate electric discharge, when the output voltage of accurate integrating circuit is lower than 2.5V, the output of voltage comparator is 0V, and electronic switch turns off, and luminotron extinguishes.Iterative cycles, forms the pulse signal of vibration.Because photoelectric device has certain conduction voltage drop, therefore, when being discharged by it, voltage can not be put into zero, in order to make sparking voltage can to zero, meets an inductance L 1 and diode D3, can provide path of releasing like this by inductance at voltage stabilizing diode D1 two ends.Make the starting point exporting pulse be 0, diode can play a protective role.Be unlikely to circuit is damaged.Each exports the burst pulse that pulse is 0 to 2.5V like this.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (10)
1. a metal oxide arrester on-line monitoring system, it is characterized in that, comprise data acquisition module, data processing module and data transmitting module, the data of collection are sent to data processing module by data transmitting module by data acquisition module, the ruuning situation of data processing module to equipment makes assessment and diagnosis, and described data acquisition module comprises leakage current sensor.
2. metal oxide arrester on-line monitoring system according to claim 1, is characterized in that, described data processing module adopts LM3S1138 microcontroller.
3. metal oxide arrester on-line monitoring system according to claim 1, is characterized in that, described data transmitting module adopts optical fiber load mode.
4. metal oxide arrester on-line monitoring system according to claim 1, it is characterized in that, described leakage current sensor comprises total current loop input interface, automatic electricity getting source circuit, leakage current sample circuit, power frequency change-over circuit, electronic switching circuit and electro-optical conversion circuit, automatic electricity getting source circuit access lightning arrester output terminal, the power supply of power frequency change-over circuit is connected to automatic electricity getting source circuit out-put supply, the sample resistance of leakage current sample circuit is serially connected in current return, output is connected to power frequency change-over circuit, the output terminal of power frequency change-over circuit is to electronic switching circuit, go to control electrical to optical converter circuit.
5. metal oxide arrester on-line monitoring system according to claim 4, it is characterized in that, described automatic electricity getting source circuit and lightning arrester output terminal IN+ and IN-are in series, and automatic electricity getting source circuit holds the voltage stabilizing diode D1 of a 8.2V in parallel at input end IN+ and IN-.
6. metal oxide arrester on-line monitoring system according to claim 4, is characterized in that, described power frequency change-over circuit comprises accurate integrating circuit and voltage comparator circuit, and the power supply of voltage comparator circuit connects the out-put supply of automatic electricity getting source circuit; The output terminal of voltage comparator, to electronic switching circuit, goes to control electrical to optical converter circuit.The input signal of accurate integrating circuit is lightning arrester leakance, and the output voltage of accurate integrating circuit and the pass of lightning arrester leakance are integration.
7. metal oxide arrester on-line monitoring system according to claim 6, is characterized in that, the anti-phase input termination power supply 2.5V of described voltage comparator, in-phase input end connects the output of accurate integrating circuit.
8. metal oxide arrester on-line monitoring system according to claim 5, is characterized in that, described voltage stabilizing diode D1 two ends also meet an inductance L 1 and diode D3, provide by inductance path of releasing.
9. metal oxide arrester on-line monitoring system according to claim 1, is characterized in that, described data acquisition module also comprises Temperature Humidity Sensor module.
10. metal oxide arrester on-line monitoring system according to claim 9, it is characterized in that, described monitoring system also comprises power module, power module is data processing module and Temperature Humidity Sensor module for power supply, the power of alterating and direct current of Temperature Humidity Sensor module employing ± 15V, data processing module adopts the direct supply of+5V.
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CN201510537559.2A CN105223433A (en) | 2015-08-26 | 2015-08-26 | Metal oxide arrester on-line monitoring system |
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CN201510537559.2A CN105223433A (en) | 2015-08-26 | 2015-08-26 | Metal oxide arrester on-line monitoring system |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105676035A (en) * | 2016-03-04 | 2016-06-15 | 北京万云科技开发有限公司 | Surge protection device health monitor |
CN107438356A (en) * | 2017-08-08 | 2017-12-05 | 芜湖市凯鑫避雷器有限责任公司 | A kind of electric leakage screening arrangement of electric ceramic lightning arrester |
CN109859914A (en) * | 2019-03-05 | 2019-06-07 | 哈尔滨理工大学 | A kind of transmission system controllable metal oxide arrester |
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CN202230150U (en) * | 2011-09-05 | 2012-05-23 | 上海格蒂电力科技股份有限公司 | On-line monitoring intelligent terminal for electric power lightning arrester with fiber for power supply |
CN102508094A (en) * | 2011-10-18 | 2012-06-20 | 南京信息职业技术学院 | Leakage current sensor of lightning arrester |
CN204349582U (en) * | 2014-12-19 | 2015-05-20 | 国网山东诸城市供电公司 | A kind of power distribution network remote monitoring and managing system |
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2015
- 2015-08-26 CN CN201510537559.2A patent/CN105223433A/en active Pending
Patent Citations (3)
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CN202230150U (en) * | 2011-09-05 | 2012-05-23 | 上海格蒂电力科技股份有限公司 | On-line monitoring intelligent terminal for electric power lightning arrester with fiber for power supply |
CN102508094A (en) * | 2011-10-18 | 2012-06-20 | 南京信息职业技术学院 | Leakage current sensor of lightning arrester |
CN204349582U (en) * | 2014-12-19 | 2015-05-20 | 国网山东诸城市供电公司 | A kind of power distribution network remote monitoring and managing system |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105676035A (en) * | 2016-03-04 | 2016-06-15 | 北京万云科技开发有限公司 | Surge protection device health monitor |
CN107438356A (en) * | 2017-08-08 | 2017-12-05 | 芜湖市凯鑫避雷器有限责任公司 | A kind of electric leakage screening arrangement of electric ceramic lightning arrester |
CN109859914A (en) * | 2019-03-05 | 2019-06-07 | 哈尔滨理工大学 | A kind of transmission system controllable metal oxide arrester |
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