CN105259464A - A power transmission line insulator distributed leakage current monitoring device - Google Patents
A power transmission line insulator distributed leakage current monitoring device Download PDFInfo
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- CN105259464A CN105259464A CN201510757193.XA CN201510757193A CN105259464A CN 105259464 A CN105259464 A CN 105259464A CN 201510757193 A CN201510757193 A CN 201510757193A CN 105259464 A CN105259464 A CN 105259464A
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Abstract
The invention discloses a power transmission line insulator distributed leakage current monitoring device characterized in that the power transmission line insulator distributed leakage current monitoring device comprises several monitoring rings and a communication station; the monitoring rings carry out communication with the communication station through wireless communication; the monitoring rings sleeve steel caps of the upper surfaces of power transmission line insulators; insulating parts are arranged below the steel caps; the communication station is arranged between power transmission line towers which are provided with the monitoring rings; and the monitoring rings are used for recording amplitudes of leakage currents of the insulators and transmit information about the amplitudes of leakage currents of the insulators to the communication station through wireless communication. The communication station is used for controlling the monitoring rings, and transmits information about the amplitudes of leakage currents of the insulators to a remote terminal after gathering so as to motor the states of the insulators at any time. According to the invention, pollution degrees of the insulators are monitored by means of monitoring the insulator leakage currents to carry out pollution flashover early warning to further avoid occurrence of pollution flashover of the power transmission line insulators and guarantee safe and stable operation of an electric power system.
Description
Technical field
The present invention relates to the distributed leakage current monitoring device of a kind of electric transmission line isolator, belong to electric transmission line isolator on-line monitoring technique field.
Background technology
Electric transmission line isolator is chronically exposed to open air, and due to the factor such as ash, the industrial pollution impact that naturally falls, surface can be adhered to dirt and move thing, forms pollution layer.Under drying regime, pollution layer generally can not conduct electricity, and the impact of External Insulation electric property is less; But under the environment that humidity is larger, pollution layer can make moist in moisture absorption, makes the solubility electrolyte dissolution in pollution layer, and pollution layer starts conduction, and defilement and insulation sub-surface, by flowing through the leakage current of certain amplitude, progressively develops into shelf depreciation.When the development of electric arc runs through upper and lower two electrodes of insulator, insulating surface generation flashover, causes pollution flashover phenomenon.Under pollution flashover accident occurs in working voltage mostly, often cause power outage on a large scale, very harmful to the safe operation of electric system.According to statistics, pollution flashover accident number of times occupies the 2nd in power grid accident total degree to the nineties 20th century 80, be only second to lightening hazard, and the normally trans-regional large-area accident of pollution flashover accident, the loss caused is 10 times of lightening hazard, and its harm is much larger than other kind electric network fault.Electric transmission line isolator pollution flashover is one of difficult problem hindering safe operation of power system.Therefore, in order to avoid the generation of electric transmission line isolator pollution flashover, need to carry out on-line monitoring to the pollution degree of insulator, early warning is carried out to the pollution flashover of insulator.
The current on-line monitoring about electric transmission line isolator pollution degree mainly contains the method for the leakage current of monitoring insulator.Insulator leakage current refers to the electric current flowing through insulator surface pollution layer that filth recorded by the time of tide under working voltage effect.When voltage and weather conditions one timing, insulator surface leakage current is directly proportional to the filthy order of severity.Insulator leakage current significantly determines relation with also existing between pollution flashover voltage, can to a great extent estimating and forecasting insulator pollution flashover voltage and evaluate the filthy level of insulator.Therefore, monitoring the leakage current of insulator is carry out the most effective method of on-line monitoring to insulator dirty degree.
Patents at present about the leakage current of monitoring insulator has.CN200910190853 provides current sensor for polluted insulator leakage of AC high-voltage electric transmission line, and convenient on-the-spot handling, measurement leakage current precision is high, bandwidth, the linearity are good.CN201210297103 provides photoelectric type ultrahigh voltage direct-current insulator leakage current monitoring system, adopts Optical Fiber Transmission leakage current data.CN201210535143 provides a kind of extra-high voltage direct current insulator leakage current measuring system, has the advantages such as high speed, safety, reliable measurements, is specially adapted to field environment operation.CN201410257722 provide a kind of exchange insulator leak and corona pulse electric current on-Line Monitor Device and adopt this device to carry out the method for on-line monitoring, realize the real-time accurate measurements to insulator virtual condition.To sum up, the method cost of current monitoring leakage electric current is higher, and single device can only measure place's electric current, and it is high that cost is measured in many places; In addition, sensor is connected with equipment, there is great potential safety hazard.Therefore, the monitoring method needing research safe and practical more economically.
Summary of the invention
The object of the invention is to the defect overcoming prior art existence, propose the distributed leakage current monitoring device of a kind of electric transmission line isolator.
The present invention adopts following technical scheme: the distributed leakage current monitoring device of electric transmission line isolator, it is characterized in that, comprise several monitoring rings, operating office, described monitoring ring is communicated with described operating office by radio communication, described monitoring ring set is loaded on the steel cap of electric transmission line isolator upper surface, the below of described steel cap is provided with insulating part, described operating office is arranged between several electric power line pole towers being provided with described monitoring ring, described monitoring ring be used for record insulator leakage current amplitude and insulator leakage current amplitude information is sent to described operating office by radio communication, described operating office is used for controlling to monitor ring described in several and gathers and insulator Leakage Current amplitude information is sent to remote terminal monitors insulator state at any time.
Preferably, described monitoring ring comprises PVC plastic, iron-clad, the right side of described PVC plastic is connected by clamp with the right side of described iron-clad, the left side of described PVC plastic is connected with the clasp that passes on left of described iron-clad, the inside of described PVC plastic is provided with coil, iron core, described coil winding is arranged on described iron core, the inside surface of described iron core is provided with rubber, described rubber inlaid is enclosed within described steel cap, described iron-clad inside is provided with circuit module, accumulator, and described iron-clad is provided with antenna; Described coil is used for gathering the leakage current of insulator.
Preferably, described monitoring ring also comprises A/D modular converter, MCU processor of single chip computer, ZigBee wireless communication module, and described circuit module comprises rectification circuit, peak sampling hold circuit, described coil successively with described rectification circuit, described peak sampling hold circuit, described A/D modular converter, MCU processor of single chip computer, ZigBee wireless communication module is connected, the effect of described rectification circuit is that ac leakage current waveform is converted into DC waveform, the effect of described peak sampling hold circuit is the amplitude information obtaining leakage current from the waveform of leakage current, the effect of described A/D modular converter is that simulating signal is converted into digital signal, the effect of described MCU processor of single chip computer is process data, control the work of described monitoring ring, the effect of described ZigBee wireless communication module carries out radio communication with described operating office, described accumulator provides electric energy to described circuit module, described antenna is used for radio communication.
Preferably, described monitoring ring is horse-hof shape, and described PVC plastic is oval, and described iron-clad is bar-shaped.
Preferably, described operating office comprises ZigBee wireless communication module, MCU processor of single chip computer, GPS locating module, GPRS wireless communication module, accumulator, solar cell, humidity sensor, described MCU processor of single chip computer is connected with described ZigBee wireless communication module, GPS locating module, GPRS wireless communication module, humidity sensor respectively, and described solar cell and described accumulator are used for powering to described operating office; Described ZigBee wireless communication module is used for carrying out radio communication with described monitoring ring, described GPS locating module is used for obtaining the geographical location information of described monitoring ring, described humidity sensor is used for the humidity of testing environment, the effect of described MCU processor of single chip computer is aggregation process leakage current information, and the effect of described GPRS wireless communication module carries out radio communication with remote terminal.
Preferably, each described monitoring ring is provided with unique ID, and described operating office controls dormancy and the work of monitoring ring by control ID.
The beneficial effect that the present invention reaches: (1) the invention provides the distributed leakage current monitoring device of electric transmission line isolator, insulator dirty degree is monitored by monitoring insulator leakage current, carry out pre-warning, avoid the generation of electric transmission line isolator pollution flashover, ensure that power system safety and stability runs; (2) monitoring device function control is at operating office, and an operating office can monitor the leakage current information of many places monitoring ring; (2) characteristic quantity that leakage current monitoring device is monitored is leakage current amplitude, simple effectively reliable; (3) monitor between ring and operating office and send information by radio communication, convenient and swift energy-conservation; (4) monitor ring and be generally in dormant state, need operating office to wake just work monitoring insulator leakage current up, power and energy saving.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention, and wherein 11-monitors ring, 12-electric transmission line isolator, 13-wire, 14-cross-arm, 15-operating office.
Fig. 2 is the course of work schematic diagram of monitoring ring of the present invention, wherein 21-coil, 22-iron core, 23-electric transmission line isolator, 24-rectification circuit, 25-peak sampling hold circuit, 26-A/D modular converter, 27-MCU processor of single chip computer, 28-ZigBee wireless communication module, 29-accumulator.
Fig. 3 is the structural representation of monitoring ring of the present invention, wherein 301-PVC plastics, 302-coil, 303-iron core, 304-rubber, 305-clasp, 306-clamp, 307-iron-clad, 308-antenna, 309-circuit module, 310-accumulator.
Fig. 4 is the installation schematic top plan view of monitoring ring of the present invention, and wherein 41-steel cap, 42-monitor ring, 43-insulating part.
Fig. 5 is the connection diagram of operating office of the present invention, wherein 51-ZigBee wireless communication module, 52-MCU processor of single chip computer, 53-GPS locating module, 54-GPRS wireless communication module, 55-accumulator, 56-solar cell, 57-humidity sensor.
Fig. 6 is the communication process schematic diagram of monitoring ring of the present invention and operating office, and wherein 61-operating office, 62-monitor ring.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Fig. 1 is one-piece construction schematic diagram of the present invention, and wherein 11-monitors ring, 12-transmission circuit insulator string, 13-wire, 14-cross-arm, 15-operating office.The present invention adopts following technical scheme: the distributed leakage current monitoring device of electric transmission line isolator, it is characterized in that, comprise several monitoring rings 11, operating office 15, monitoring ring 11 is communicated with operating office 15 by radio communication, monitoring ring 11 is set on the steel cap of electric transmission line isolator 12 upper surface, the below of steel cap is provided with insulating part, operating office 15 is arranged between several electric power line pole towers being provided with monitoring ring 11, monitor ring 11 be used for recording the amplitude of insulator leakage current and insulator leakage current amplitude information is sent to operating office 15 by radio communication, operating office 15 is used for controlling several monitoring rings 11 and gathers insulator Leakage Current amplitude information is sent to remote terminal monitors insulator state at any time.
Monitoring ring 11 and operating office 15 constitute the on-line monitoring system of electric transmission line isolator leakage current, whole system function control is at operating office 15, monitoring ring 11 multiple spot is arranged, each monitoring ring 11 possesses unique ID, and operating office 15 controls specific monitoring ring 11 by ID and gathers leakage current information.Communicated by ZigBee wireless communication module between monitoring ring 11 and operating office 15.
Fig. 2 is the course of work schematic diagram of monitoring ring of the present invention, wherein 21-coil, 22-iron core, 23-electric transmission line isolator, 24-rectification circuit, 25-peak sampling hold circuit, 26-A/D modular converter, 27-MCU processor of single chip computer, 28-ZigBee wireless communication module, 29-accumulator.Coil 21 successively with rectification circuit 24, peak sampling hold circuit 25, A/D modular converter 26, MCU processor of single chip computer 27, ZigBee wireless communication module 28 is connected, the effect of rectification circuit 24 is that ac leakage current waveform is converted into DC waveform, the effect of peak sampling hold circuit 25 is the amplitude informations obtaining leakage current from the waveform of leakage current, the effect of A/D modular converter 26 is that simulating signal is converted into digital signal, the effect of MCU processor of single chip computer 27 is process data, control the work of monitoring ring, the effect of ZigBee wireless communication module 28 carries out radio communication with operating office, accumulator 29 provides electric energy to circuit module.
Fig. 3 is the structural representation of monitoring ring of the present invention, wherein 301-PVC plastics, 302-coil, 303-iron core, 304-rubber, 305-clasp, 306-clamp, 307-iron-clad, 308-antenna, 309-circuit module, 310-accumulator.Fig. 4 is the installation schematic top plan view of monitoring ring of the present invention, and wherein 41-steel cap, 42-monitor ring, 43-insulating part.Monitoring ring 42 is in horse-hof shape, and PVC plastic 301 is oval, and iron-clad 307 is bar-shaped.Monitoring ring 42 comprises PVC plastic 301, iron-clad 307, the right side of PVC plastic 301 is connected by clamp 306 with the right side of iron-clad 307, the left side of PVC plastic 301 is connected with the clasp 305 that passes on left of iron-clad 307, the inside of PVC plastic 301 is provided with coil 302, iron core 303, coil 302 is wound around and is arranged on iron core 303, the inside surface of iron core 303 is provided with rubber 304, rubber 304 is nested on steel cap 41, iron-clad 307 inside is provided with circuit module 309, accumulator 310, iron-clad 307 is provided with antenna 308; Coil 302 is used for gathering the leakage current of insulator, and antenna 308 is for radio communication.
Coil 302 material adopts copper enameled wire, single-ended opening, and adopt continous way winding to be wound on iron core 303, iron core 303 material adopts siliconized plate, is PVC plastic 301 outside coil 302 and iron core 303.Bar-like portion is iron-clad 307, and the inside is provided with circuit module 309 and accumulator 310, reduces interference, coil 302 place in circuit module 309.Oval part is be connected by a clasp 305 with bar-like portion in left side, can be movable, forms an opening and is entangled by steel cap 41, then close.By a clamp 306, two parts are locked on right side.A feature of monitoring ring 42 is, in closed state, in oval part, right side iron core 303 contacts with bar-shaped iron-clad 307, reduce iron core magnetic resistance, increase sensitivity, but left part does not contact, there is 5mm and intercept (PVC shell), eliminate the magnetically saturated impact of iron.Be rubber 304 inside monitoring ring 42, contact with the hard of steel cap 41 for reducing monitoring ring 42, monitoring for protection ring 42, increases friction simultaneously, is beneficial to monitoring ring 42 and is close to steel cap 41.Monitoring ring 42 to be arranged on low pressure end first insulator 43 upper surface and to be stuck on steel cap 41.
Fig. 5 is the connection diagram of operating office of the present invention, wherein 51-ZigBee wireless communication module, 52-MCU processor of single chip computer, 53-GPS locating module, 54-GPRS wireless communication module, 55-accumulator, 56-solar cell, 57-humidity sensor.Operating office comprises ZigBee wireless communication module, MCU processor of single chip computer, GPS locating module, GPRS wireless communication module, accumulator, solar cell, humidity sensor, MCU processor of single chip computer is connected with ZigBee wireless communication module, GPS locating module, GPRS wireless communication module, humidity sensor respectively, and solar cell and accumulator are used for powering to operating office; ZigBee wireless communication module is used for and monitors ring and carry out radio communication, GPS locating module is used for obtaining the geographical location information of monitoring ring, humidity sensor is used for the humidity of testing environment, the effect of MCU processor of single chip computer is aggregation process leakage current information, and the effect of GPRS wireless communication module carries out radio communication with remote terminal.
In operating office 15, ZigBee wireless communication module 51 obtains the leakage current amplitude information that ZigBee wireless communication module 28 transmission is come from monitoring ring 11.Leakage current amplitude information is sent to MCU processor of single chip computer 52 by ZigBee wireless communication module 51, geographical location information is sent to MCU processor of single chip computer 52, MCU processor of single chip computer 52 these information of aggregation process and sends to GPRS wireless communication module 54 by GPS locating module 53.Leakage current amplitude information through aggregation process is sent to remote terminal and monitors insulator state at any time by GPRS wireless communication module 54.
Humidity sensor 57 in operating office 15, for the humidity of monitoring of environmental, when humidity is greater than 90%, illustrates that present external environment is conducive to pollution flashover development, and operating office 15 carrys out monitoring leakage electric current to monitoring ring 11 wake-up signal wakes monitoring ring 11 that sends per hour; When humidity is less than 90%, operating office 15 no longer sends wake-up signal to monitoring ring 11, and operating office 15 and monitoring ring 11 are all in dormant state, power and energy saving.
Fig. 6 is the communication process schematic diagram of monitoring ring of the present invention and operating office, and wherein 61-operating office, 62-monitor ring.Each monitoring ring 62 is provided with unique ID, and operating office 61 controls dormancy and the work of monitoring ring 62 by control ID.
By ZigBee wireless communication module 28(51 between monitoring ring 62 and operating office 61) communicate.First, when ambient humidity is greater than 90%, operating office 61 sends wake-up signal to monitoring ring 62, and operating office 61 sends signal 1. (id information of monitoring ring) extremely monitoring ring 62, monitoring ring 62 return signal 2. (id information of monitoring ring), to operating office 61, is monitored ring 62 and is waken up; When ambient humidity is less than 90%, operating office 61 does not wake monitoring ring 62 up; Then, operating office 61 send signal 3. (sense command needs to detect leakage current information) to monitoring ring 62, monitoring ring 62 return signal 4. (leakage current information) to operating office 61, operating office 61 obtains the amplitude information of leakage current; Finally, operating office 61 sends signal 5. (dormancy) to monitoring ring 62, and operating office 61 terminates with the current communication process of monitoring ring 62.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (6)
1. the distributed leakage current monitoring device of electric transmission line isolator, it is characterized in that, comprise several monitoring rings, operating office, described monitoring ring is communicated with described operating office by radio communication, described monitoring ring set is loaded on the steel cap of electric transmission line isolator upper surface, the below of described steel cap is provided with insulating part, described operating office is arranged between several electric power line pole towers being provided with described monitoring ring, described monitoring ring be used for record insulator leakage current amplitude and insulator leakage current amplitude information is sent to described operating office by radio communication, described operating office is used for controlling to monitor ring described in several and gathers and insulator Leakage Current amplitude information is sent to remote terminal monitors insulator state at any time.
2. the distributed leakage current monitoring device of electric transmission line isolator according to claim 1, it is characterized in that, described monitoring ring comprises PVC plastic, iron-clad, the right side of described PVC plastic is connected by clamp with the right side of described iron-clad, the left side of described PVC plastic is connected with the clasp that passes on left of described iron-clad, the inside of described PVC plastic is provided with coil, iron core, described coil winding is arranged on described iron core, the inside surface of described iron core is provided with rubber, described rubber inlaid is enclosed within described steel cap, described iron-clad inside is provided with circuit module, accumulator, described iron-clad is provided with antenna, described coil is used for gathering the leakage current of insulator.
3. the distributed leakage current monitoring device of electric transmission line isolator according to claim 2, it is characterized in that, described monitoring ring also comprises A/D modular converter, MCU processor of single chip computer, ZigBee wireless communication module, and described circuit module comprises rectification circuit, peak sampling hold circuit, described coil successively with described rectification circuit, described peak sampling hold circuit, described A/D modular converter, MCU processor of single chip computer, ZigBee wireless communication module is connected, the effect of described rectification circuit is that ac leakage current waveform is converted into DC waveform, the effect of described peak sampling hold circuit is the amplitude information obtaining leakage current from the waveform of leakage current, the effect of described A/D modular converter is that simulating signal is converted into digital signal, the effect of described MCU processor of single chip computer is process data, control the work of described monitoring ring, the effect of described ZigBee wireless communication module carries out radio communication with described operating office, described accumulator provides electric energy to described circuit module, described antenna is used for radio communication.
4. the distributed leakage current monitoring device of electric transmission line isolator according to claim 2, is characterized in that, described monitoring ring is horse-hof shape, and described PVC plastic is oval, and described iron-clad is bar-shaped.
5. the distributed leakage current monitoring device of electric transmission line isolator according to claim 1, it is characterized in that, described operating office comprises ZigBee wireless communication module, MCU processor of single chip computer, GPS locating module, GPRS wireless communication module, accumulator, solar cell, humidity sensor, described MCU processor of single chip computer is connected with described ZigBee wireless communication module, GPS locating module, GPRS wireless communication module, humidity sensor respectively, and described solar cell and described accumulator are used for powering to described operating office; Described ZigBee wireless communication module is used for carrying out radio communication with described monitoring ring, described GPS locating module is used for obtaining the geographical location information of described monitoring ring, described humidity sensor is used for the humidity of testing environment, the effect of described MCU processor of single chip computer is aggregation process leakage current information, and the effect of described GPRS wireless communication module carries out radio communication with remote terminal.
6. the distributed leakage current monitoring device of electric transmission line isolator according to claim 1, is characterized in that, each described monitoring ring is provided with unique ID, and described operating office controls dormancy and the work of monitoring ring by control ID.
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| CN201510757193.XA CN105259464B (en) | 2015-11-09 | 2015-11-09 | Electric transmission line isolator distribution leakage current monitoring device |
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| CN201510757193.XA CN105259464B (en) | 2015-11-09 | 2015-11-09 | Electric transmission line isolator distribution leakage current monitoring device |
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| CN106932635A (en) * | 2017-04-06 | 2017-07-07 | 漳州市东方智能仪表有限公司 | A kind of on-vehicle battery detector |
| CN107271833A (en) * | 2017-06-05 | 2017-10-20 | 江苏尚坤电力安装有限公司 | A kind of electric transmission line isolator On-line Monitoring of Leakage Current method and its system |
| CN107505531A (en) * | 2017-08-10 | 2017-12-22 | 中国科学院上海高等研究院 | A kind of earth detector, insulator earth detector, system and method |
| CN109031024A (en) * | 2018-08-17 | 2018-12-18 | 国网江苏省电力有限公司盐城供电分公司 | A kind of current leakage detection system and its detection method based on power grid |
| CN111679161A (en) * | 2020-04-28 | 2020-09-18 | 中国电力科学研究院有限公司 | Device and method for evaluating insulation state of composite cross arm insulator |
| CN117330883A (en) * | 2023-12-01 | 2024-01-02 | 国网山西省电力公司电力科学研究院 | Overhead line insulator running state monitoring system and method |
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Address after: 210000, Jiangsu, Jiangning Development Zone, Nanjing, the source of the road, No. 58, -5 Applicant after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. MAINTENANCE BRANCH Applicant after: WUHAN University Address before: 210000, Jiangsu, Jiangning Development Zone, Nanjing, the source of the road, No. 58, -5 Applicant before: MAINTENANCE DIVISION OF STATE GRID JIANGSU ELECTRIC POWER Co. Applicant before: Wuhan University Address after: 210000, Jiangsu, Jiangning Development Zone, Nanjing, the source of the road, No. 58, -5 Applicant after: MAINTENANCE DIVISION OF STATE GRID JIANGSU ELECTRIC POWER Co. Applicant after: WUHAN University Address before: 210000, Jiangsu, Jiangning Development Zone, Nanjing, the source of the road, No. 58, -5 Applicant before: JIANGSU ELECTRIC POWER COMPANY MAINTENANCE BRANCH Applicant before: Wuhan University |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |