CN105182118A - Insulator contamination degree monitoring system - Google Patents
Insulator contamination degree monitoring system Download PDFInfo
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- CN105182118A CN105182118A CN201510536138.8A CN201510536138A CN105182118A CN 105182118 A CN105182118 A CN 105182118A CN 201510536138 A CN201510536138 A CN 201510536138A CN 105182118 A CN105182118 A CN 105182118A
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Abstract
The invention discloses an insulator contamination degree monitoring system and belongs to the technical field of high-voltage protection electric appliances. The system comprises an insulator data collection unit, a signal pre-processing unit, a single-chip microcomputer, a communication unit, a solar power supply unit and a background center. The insulator data collection unit is used for acquiring the related data signals of an insulator, wherein the related data signals are composed of a leakage current signal, an ambient temperature signal and a humidity signal. The insulator data collection unit is connected with the signal pre-processing unit. The signal pre-processing unit is connected with the single-chip microcomputer. The single-chip microcomputer conducts the filtering treatment on noises by means of a composed morphological filter to obtain an analysis result on the contamination degree of the insulator. The single-chip microcomputer is connected with the communication unit. The communication unit is wirelessly connected with the background center. According to the technical scheme of the invention, the signal waveform of the leakage current can be obviously improved, so that the judgment on the contamination degree of the insulator is facilitated. The detection accuracy of the system is improved. The system is powered on by the solar energy, so that the long-term stable operation of the system is ensured. The problems that the noise processing precision is low and the error is large for the signals of the leakage current in the prior art can be solved.
Description
Technical field
The invention belongs to high voltage protective technical field of electric appliances, relate to insulator pollution monitoring direction, be specifically related to a kind of insulator contamination degree monitoring system.
Background technology
Insulator is a kind of special insulation control, can play an important role in overhead transmission line.In one's early years, insulator is used for electric pole, and slowly develop and hung the insulator of a lot of plate-like in one end of high type high-tension bus-bar connection tower, it is made up of glass or pottery usually in order to increase creepage distance, is just insulator.Insulator should not to change the various dynamo-electric stress that causes and losing efficacy due to environment and electric load condition, otherwise insulator would not produce great effect, will damage use and the operation life of whole piece circuit.
Along with the high speed development of China's industrial and agricultural production, electric transmission line isolator pollution flashover problem is day by day serious.Therefore be badly in need of the insulator on-line monitoring equipment of exploitation adaptation electric system demand.Current domestic more existing insulator on-line monitoring systems are all using leakage current peak value, effective value and the pulse number characteristic quantity as reflection pollution level, and on-line monitoring system works in the rugged environment of field usually, therefore the leakage current signal that scene collects is subject to the impact of multiple noise, these interference also make leakage current sine wave signal peak, paddy place easily occurs shaking fluctuation, once interference shelf depreciation or corona discharge phenomenon occur insulator surface, leakage current will produce distortion.Must carry out noise reduction process, to identify its basic configuration, improve its accuracy of detection leakage current signal as seen, this provides basis for estimation accurately most important to operation power and administrative authority.
Summary of the invention
According to above the deficiencies in the prior art, technical matters to be solved by this invention proposes a kind of insulator contamination degree monitoring system, by using broad sense Multi-structure elements serial complex morphological wave filter, can the interference of multiple noise simultaneously in filtering insulator Leakage Current signal, solve noise processed precision in Leakage Current signal not high, the problem that error is large, have and can significantly improve leakage current signal waveform, be beneficial to the judgement of insulator contamination degree, improve its accuracy of detection, and use solar powered, ensure the advantage of long-time steady operation.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of insulator contamination degree monitoring system, described insulator contamination degree monitoring system comprises insulator data acquisition unit, Signal Pretreatment unit, single-chip microcomputer, communication unit, solar powered unit and center, backstage, the relevant data signals of insulator data acquisition unit acquires insulator comprises Leakage Current, environment temperature, moisture signal, insulator data acquisition unit connection signal pretreatment unit, insulator data acquisition unit acquires to data-signal be sent to Signal Pretreatment unit and carry out data prediction, the output terminal of Signal Pretreatment unit connects the input end of single-chip microcomputer, after single-chip microcomputer receives the signal of insulator, the complex morphological wave filter in single-chip microcomputer is utilized to carry out noise filtering process, draw the pollution level analysis result of insulator, the output terminal connecting communication unit of single-chip microcomputer, center, communication unit wireless connections backstage, the operation result of single-chip microcomputer is sent to center, backstage by communication unit is long-range, solar powered unit is that entire system is powered.
In said system, described insulator data acquisition unit comprises current sensor, temperature sensor and humidity sensor, the Leakage Current signal of current sensor detection insulator comprises size and the waveform of Leakage Current, temperature sensor is used for detecting the temperature of place environment of insulator, humidity sensor is used for detecting the humidity of insulator place environment, and the insulator relevant data signals of current sensor, temperature sensor and humidity sensor collection is sent to Signal Pretreatment unit.Be provided with collector ring in described current sensor, insulator surface leakage current enters current sensor after collector ring extracts.Described Signal Pretreatment unit comprises filtering circuit and amplifying circuit, and filtering circuit connects amplifying circuit, and the insulator related data that Signal Pretreatment unit receives flows through filtering circuit and amplifying circuit carries out Signal Pretreatment.Described single-chip microcomputer comprises AD conversion module and complex morphological wave filter, AD conversion unit connection signal pretreatment unit, AD conversion module is utilized to carry out high-speed sampling to leakage current signal, complex morphological wave filter applied morphology filtering algorithm carries out filtering process to the data obtained of sampling, and tries to achieve the mean value of leakage current, peak value.Described complex morphological wave filter is broad sense Multi-structure elements serial complex morphological wave filter, selects the semi-circular structure element of different length and linear structure element to carry out the multiple noise of filtering process filtering to the Leakage Current signal collected.Described AD conversion module adopts the sample frequency of 10kHz to sample to Leakage Current signal.Described communication unit adopts the short message service based on GSM network to complete the data communication at single-chip microcomputer and center, backstage, data timing after single-chip microcomputer receives and processes by communication unit is sent to center, backstage, and center, backstage sends instruction and is sent to single-chip microcomputer amendment adjustment parameter.Described solar powered unit comprises photovoltaic module, circuit interface, inversion module and accumulator, photovoltaic module connects inversion module, circuit interface is arranged on inversion module, photovoltaic module is for receiving sun power and converting sun power to electric energy, circuit interface is used for each power supply unit in connected system, inversion module connects accumulator, and accumulator is the electric current of voltage regulation of system power supply stable output.
Beneficial effect of the present invention is: the invention provides a kind of insulator contamination degree monitoring system, this system uses broad sense Multi-structure elements serial complex morphological wave filter, can the interference of the simultaneously multiple noise of filtering, significantly can improve the waveform of leakage current signal, be conducive to the judgement of insulator contamination degree, improve its accuracy of detection, and use solar powered, ensure long-time steady operation.
Accompanying drawing explanation
Below the content expressed by this Figure of description and the mark in figure are briefly described:
Fig. 1 is the principle of work block diagram of the insulator contamination degree monitoring system of the specific embodiment of the present 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.
The invention provides a kind of insulator contamination degree monitoring system, this system uses broad sense Multi-structure elements serial complex morphological wave filter, can the interference of the simultaneously multiple noise of filtering, significantly can improve the waveform of leakage current signal, be conducive to the judgement of insulator contamination degree, improve its accuracy of detection, and use solar powered, ensure long-time steady operation.
As shown in Figure 1, insulator contamination degree monitoring system comprises insulator data acquisition unit, Signal Pretreatment unit, single-chip microcomputer, communication unit, solar powered unit and center, backstage, the relevant data signals of insulator data acquisition unit acquires insulator comprises Leakage Current, environment temperature, moisture signal, insulator data acquisition unit connection signal pretreatment unit, insulator data acquisition unit acquires to data-signal be sent to Signal Pretreatment unit and carry out data prediction, the output terminal of Signal Pretreatment unit connects the input end of single-chip microcomputer, after single-chip microcomputer receives the signal of insulator, utilize complex morphological wave filter, multiple interference noise in the discharge current of filtering simultaneously, the obvious waveform improving leakage current signal, draw the pollution level analysis result of insulator, the output terminal connecting communication unit of single-chip microcomputer, center, communication unit wireless connections backstage, the operation result of single-chip microcomputer is sent to center, backstage by communication unit is long-range, solar powered unit is that entire system is powered.
Current sensor is provided with in insulator data acquisition unit, temperature sensor and humidity sensor, the Leakage Current signal of current sensor detection insulator comprises size and the waveform of Leakage Current, insulator surface leakage current enters current sensor after collector ring extracts, because leakage current is transmission voltage, environmental factor, the result of insulator contamination situation combined influence, so will to environment temperature, humidity is measured in real time, temperature sensor is used for detecting the temperature of place environment of insulator, humidity sensor is used for detecting the humidity of insulator place environment, the insulator relevant data signals of insulator data acquisition unit acquires is sent to Signal Pretreatment unit.
Signal Pretreatment unit comprises filtering circuit and amplifying circuit, after Signal Pretreatment unit receives the insulator related data of insulator collecting unit transmission, Leakage Current signal is input to filtering circuit successively and amplifying circuit carries out Signal Pretreatment, pretreated Leakage Current signal is sent in single-chip microcomputer.AD conversion module and complex morphological wave filter is provided with in single-chip microcomputer, AD conversion module is utilized to carry out high-speed sampling to leakage current signal, complex morphological wave filter applied morphology filtering algorithm carries out filtering process to the data obtained of sampling, and tries to achieve the mean value of leakage current, peak value.
Complex morphological wave filter in single-chip microcomputer is broad sense Multi-structure elements serial complex morphological wave filter, the semi-circular structure element of different length and linear structure element is selected to carry out filtering process to the Leakage Current signal collected, visible morphologic filtering obviously can improve the leakage current signal of sampling and obtaining, and is conducive to the judgement of insulator contamination degree.The main interference of insulator leakage current signal is white noise, impulsive noise and DC offset, owing to containing arcing pulse current signal in insulator leakage current signal, and the frequency of arcing pulse signal is unknown, with the sample frequency of 10kHz, Leakage Current signal is sampled the requirement that can meet completely signal sampling precision herein.Use semi-circular structure element can obtain good filter effect for white noise, general employing three-legged structure element for impulsive noise, linear structure element can be selected for DC offset, and when linear structure length of element reaches certain value, just can the high fdrequency component such as filtering fundamental signal and noise, extract DC offset.So selected broad sense Multi-structure elements serial complex morphological wave filter to carry out filtering process to the multiple noise in leakage current signal in the present invention, only use a kind of structural element in conventional wave filter, therefore be only adapted to a kind of filtering of noise.So application broad sense Multi-structure elements serial complex morphological wave filter, the semi-circular structure element of different length and linear structure element is selected to carry out filtering process to Leakage Current signal, visible morphologic filtering obviously can improve the leakage current signal of sampling and obtaining, and is conducive to the judgement of insulator contamination degree.
Communication unit adopts the short message service based on GSM network to complete the data communication at single-chip microcomputer and center, backstage, data timing after the acquisition and processing of single-chip microcomputer memory block is sent to center, backstage by communication unit, and instruction also can be sent to single-chip microcomputer to complete amendment and the adjustment of parameter by center, backstage.Center, backstage is used for long-range reception data, and Plotting data is become chart format, simply clear form, preserves in a database, gives the alarm remind staff when drawing danger signal.
Solar powered unit comprises photovoltaic module, circuit interface, inversion module and accumulator, photovoltaic module is connected to inversion module, circuit interface is arranged on inversion module, photovoltaic module is for receiving sun power and converting described sun power to electric energy, circuit interface is used for each power supply unit in connected system, inversion module is used for the electric energy sun power in photovoltaic module being converted to system needs, inversion module connects accumulator, accumulator is the electric current of voltage regulation of system power supply stable output, monitoring system adopts solar powered technology, long-time steady operation can be ensured.
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.The protection domain that protection scope of the present invention should limit with claims is as the criterion.
Claims (9)
1. an insulator contamination degree monitoring system, it is characterized in that, described insulator contamination degree monitoring system comprises insulator data acquisition unit, Signal Pretreatment unit, single-chip microcomputer, communication unit, solar powered unit and center, backstage, the relevant data signals of insulator data acquisition unit acquires insulator comprises Leakage Current, environment temperature, moisture signal, insulator data acquisition unit connection signal pretreatment unit, insulator data acquisition unit acquires to data-signal be sent to Signal Pretreatment unit and carry out data prediction, the output terminal of Signal Pretreatment unit connects the input end of single-chip microcomputer, after single-chip microcomputer receives the signal of insulator, the complex morphological wave filter in single-chip microcomputer is utilized to carry out noise filtering process, draw the pollution level analysis result of insulator, the output terminal connecting communication unit of single-chip microcomputer, center, communication unit wireless connections backstage, the operation result of single-chip microcomputer is sent to center, backstage by communication unit is long-range, solar powered unit is that entire system is powered.
2. insulator contamination degree monitoring system according to claim 1, it is characterized in that, described insulator data acquisition unit comprises current sensor, temperature sensor and humidity sensor, the Leakage Current signal of current sensor detection insulator comprises size and the waveform of Leakage Current, temperature sensor is used for detecting the temperature of place environment of insulator, humidity sensor is used for detecting the humidity of insulator place environment, and the insulator relevant data signals of current sensor, temperature sensor and humidity sensor collection is sent to Signal Pretreatment unit.
3. insulator contamination degree monitoring system according to claim 2, is characterized in that, is provided with collector ring in described current sensor, and insulator surface leakage current enters current sensor after collector ring extracts.
4. insulator contamination degree monitoring system according to claim 1, it is characterized in that, described Signal Pretreatment unit comprises filtering circuit and amplifying circuit, filtering circuit connects amplifying circuit, and the insulator related data that Signal Pretreatment unit receives flows through filtering circuit and amplifying circuit carries out Signal Pretreatment.
5. insulator contamination degree monitoring system according to claim 1, it is characterized in that, described single-chip microcomputer comprises AD conversion module and complex morphological wave filter, AD conversion unit connection signal pretreatment unit, AD conversion module is utilized to carry out high-speed sampling to leakage current signal, complex morphological wave filter applied morphology filtering algorithm carries out filtering process to the data obtained of sampling, and tries to achieve the mean value of leakage current, peak value.
6. insulator contamination degree monitoring system according to claim 5, it is characterized in that, described complex morphological wave filter is broad sense Multi-structure elements serial complex morphological wave filter, selects the semi-circular structure element of different length and linear structure element to carry out the multiple noise of filtering process filtering to the Leakage Current signal collected.
7. insulator contamination degree monitoring system according to claim 5, is characterized in that, described AD conversion module adopts the sample frequency of 10kHz to sample to Leakage Current signal.
8. insulator contamination degree monitoring system according to claim 1, it is characterized in that, described communication unit adopts the short message service based on GSM network to complete the data communication at single-chip microcomputer and center, backstage, data timing after single-chip microcomputer receives and processes by communication unit is sent to center, backstage, and center, backstage sends instruction and is sent to single-chip microcomputer amendment adjustment parameter.
9. insulator contamination degree monitoring system according to claim 1, it is characterized in that, described solar powered unit comprises photovoltaic module, circuit interface, inversion module and accumulator, photovoltaic module connects inversion module, circuit interface is arranged on inversion module, and photovoltaic module is for receiving sun power and converting sun power to electric energy, and circuit interface is used for each power supply unit in connected system, inversion module connects accumulator, and accumulator is the electric current of voltage regulation of system power supply stable output.
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| CN105571644A (en) * | 2016-01-19 | 2016-05-11 | 西安工程大学 | Metal dust pollution on-line monitoring device for insulator, and monitoring method thereof |
| CN106443309A (en) * | 2016-11-24 | 2017-02-22 | 中国矿业大学 | Online monitoring system for leakage current of contaminated insulator |
| CN106780148A (en) * | 2016-12-30 | 2017-05-31 | 华北电力大学 | Adaptive morphology filter method based on composite construction element |
| CN110376427A (en) * | 2019-06-12 | 2019-10-25 | 江苏南瓷绝缘子股份有限公司 | A kind of sub- on-Line Monitor Device of Intelligent insulation and its monitoring method |
| CN111900799A (en) * | 2020-06-29 | 2020-11-06 | 武汉钢铁有限公司 | Power transmission line monitoring system of iron and steel combination enterprise |
| CN112180041A (en) * | 2020-09-26 | 2021-01-05 | 国网山东省电力公司电力科学研究院 | Online direct measurement device and method for pollutants in power grid environment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105571644A (en) * | 2016-01-19 | 2016-05-11 | 西安工程大学 | Metal dust pollution on-line monitoring device for insulator, and monitoring method thereof |
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| CN106443309A (en) * | 2016-11-24 | 2017-02-22 | 中国矿业大学 | Online monitoring system for leakage current of contaminated insulator |
| CN106780148A (en) * | 2016-12-30 | 2017-05-31 | 华北电力大学 | Adaptive morphology filter method based on composite construction element |
| CN106780148B (en) * | 2016-12-30 | 2020-12-01 | 华北电力大学 | Adaptive morphological filtering method based on composite structural elements |
| CN110376427A (en) * | 2019-06-12 | 2019-10-25 | 江苏南瓷绝缘子股份有限公司 | A kind of sub- on-Line Monitor Device of Intelligent insulation and its monitoring method |
| CN111900799A (en) * | 2020-06-29 | 2020-11-06 | 武汉钢铁有限公司 | Power transmission line monitoring system of iron and steel combination enterprise |
| CN112180041A (en) * | 2020-09-26 | 2021-01-05 | 国网山东省电力公司电力科学研究院 | Online direct measurement device and method for pollutants in power grid environment |
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Application publication date: 20151223 |