CN202720299U - Insulator leakage current on-line monitoring system - Google Patents
Insulator leakage current on-line monitoring system Download PDFInfo
- Publication number
- CN202720299U CN202720299U CN 201220247817 CN201220247817U CN202720299U CN 202720299 U CN202720299 U CN 202720299U CN 201220247817 CN201220247817 CN 201220247817 CN 201220247817 U CN201220247817 U CN 201220247817U CN 202720299 U CN202720299 U CN 202720299U
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- monitoring system
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- line monitoring
- wireless communication
- acquisition terminal
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 53
- 239000012212 insulator Substances 0.000 title claims abstract description 36
- 238000004891 communication Methods 0.000 claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims description 23
- 230000003750 conditioning effect Effects 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 229910052573 porcelain Inorganic materials 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims 1
- 238000011109 contamination Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000025274 Lightning injury Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model discloses an insulator leakage current on-line monitoring system which comprises a power supply device, a current acquisition terminal and a monitoring base station, wherein the power supply device is directly connected with the current acquisition terminal, and the current acquisition terminal is connected with the monitoring base station through a wireless communication network. According to the insulator leakage current on-line monitoring system, the real-time, accurate and reliable monitoring of leakage current and contamination condition of an insulator surface is realized, the system has the advantages of strong environment adaptability, high reliability, and convenient disassembly and movement, and the system can be installed at a temporary use location at any time.
Description
Technical Field
The utility model relates to a high-tension transmission technical field, in particular to insulator leakage current on-line monitoring system.
Background
The high-voltage transmission line tower is an important link of an electric power system and is responsible for the important tasks of electric energy transmission and distribution. The reliability of the transmission line directly affects the safe and reliable operation of the power system. The failure of the insulator is the main reason for threatening the safe operation of the transmission line. According to statistics, the insulator fault accounts for the first fault of the power transmission line, wherein the tripping rate caused by insulator flashover due to lightning stroke accounts for more than 60% of the total tripping rate of the power transmission line, the electric quantity loss caused by pollution flashover of the insulator is 9-10 times of that of lightning damage, and frequent insulator string dropping enlarges accidents, prolongs power failure time and brings serious influence to power transmission. In order to ensure the operation safety of the high-voltage transmission line tower, the high-voltage transmission line tower needs to be frequently checked and measured.
At present, the operation state of the high-voltage transmission line tower is generally detected by a manual inspection method, the method causes great influence on measurement due to subjective factors, results are difficult to ensure to be accurate, and real-time online measurement cannot be achieved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an insulator leakage current on-line monitoring system to gather the leakage current of line tower reliably in real time, accuracy, and then in time discover the operation conditions of line tower insulator.
The utility model relates to an insulator leakage current on-line monitoring system includes: the system comprises a power supply device, a current acquisition terminal and a monitoring base station; the power supply device is directly connected with the current acquisition terminal, and the current acquisition terminal is connected with the monitoring base station through a wireless communication network.
Preferably, in the online monitoring system, the power supply device includes a storage battery and a power supply management module connected to each other; and the output end of the power supply management module is connected with the current acquisition terminal.
Preferably, in the above online monitoring system, the current collecting terminal includes a cutoff ring, a signal conditioning and converting unit, a processor unit and a wireless communication module; the input end of the cutoff ring is arranged at the tail end of an insulator porcelain bottle of a power transmission line tower, the output end of the cutoff ring is connected with the input end of the signal conditioning and converting unit, and the output end of the signal conditioning and converting unit, the processor unit and the wireless communication module are sequentially connected.
Preferably, in the above online monitoring system, the signal conditioning and converting unit includes a low-pass filter circuit, a high-pass filter circuit, a secondary amplifying circuit, an absolute value circuit, an AD converting unit, and a high-frequency current pulse capturing unit; the input end of the low-pass filter circuit and the input end of the high-pass filter circuit are connected with the output end of the cutoff ring, and the output end of the low-pass filter circuit, the secondary amplification circuit, the absolute value circuit and the AD conversion unit are sequentially connected; the output end of the high-pass filter circuit is connected with the input end of the high-frequency current pulse capturing unit; the output end of the AD conversion unit and the output end of the high-frequency current pulse capturing unit are connected with the processor unit.
Preferably, in the online monitoring system, the processor unit is a DSP digital signal processor.
Preferably, in the online monitoring system, the wireless communication module is based on a serial communication mode, the carrier frequency is 433MHZ, the interface baud rate is 9600bps, the format is 8N1, and the maximum transmission distance is 800 m.
Preferably, in the online monitoring system, the maximum transmission power of the wireless communication network is 17dBm, and the carrier frequency is 433 MHz.
Preferably, in the above online monitoring system, the monitoring base station is disposed on a power transmission line tower, connected to the current collecting terminal through a wireless communication network, and configured to receive and transmit the collected leakage current and the relevant calculation data.
In the utility model, the current acquisition terminal is used as a monitoring sensor, and the field measured data and the early warning/alarm information are transmitted to the monitoring base station in a wireless communication mode, thereby realizing the real-time, accurate and reliable monitoring of leakage current and the filthy condition on the surface of the insulator; and simultaneously, the utility model discloses on-line monitoring system still has that environmental adaptation ability is strong, and the reliability is high, dismantle advantages such as removal convenience.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of an insulator leakage current online monitoring system of the present invention;
fig. 2 is an electrical schematic diagram of a power supply device in an embodiment of the insulator leakage current on-line monitoring system of the present invention;
fig. 3 is a schematic structural diagram of a current collecting terminal in an embodiment of the insulator leakage current on-line monitoring system of the present invention;
fig. 4 is an electrical schematic diagram of the signal conditioning and converting unit of the current collecting terminal in the embodiment of the on-line monitoring system for leakage current of the insulator of the present invention.
Detailed Description
The invention will be described in further detail with reference to the following drawings and detailed description:
refer to fig. 1. Fig. 1 is a schematic structural diagram of an embodiment of an insulator leakage current online monitoring system. The insulator leakage current online monitoring system comprises a power supply device 1, a current acquisition terminal 2, a wireless communication network 3 and a monitoring base station 4. The power supply device 1 is directly connected with the current acquisition terminal 2, and the monitoring base station 4 is communicated with the current acquisition terminal 2 through the wireless communication network 3 to control the current acquisition terminal 2 and finish the acquisition and calculation of the leakage current of the insulator; the system can be compared with calendar history data, and has an alarm function, and after the data exceeds a set interval, the system can alarm to remind a user to respond, so that online monitoring is realized.
Refer to fig. 2. Fig. 2 is an electrical schematic diagram of the power supply apparatus 1 in the embodiment of the insulator leakage current on-line monitoring system of the present invention. The power supply device 1 comprises a storage battery 11 and a power supply management module 12; the storage battery 11 is connected with the input end of the power management module 12, and the output end of the power management module 12 is connected with the current collection terminal 2.
In specific implementation, the storage battery 11 is used as a power supply, and the power supply device 1 is directly connected with the current acquisition terminal 2 to supply power to the signal conditioning and converting unit 22, the processor unit 23 and the wireless communication module 24.
Refer to fig. 3. Fig. 3 is the embodiment of the on-line monitoring system for leakage current of insulator of the present invention, the structure diagram of the current collecting terminal 2. The current acquisition terminal 2 comprises a cutoff ring 21, a signal conditioning and converting unit 22, a processor unit 23 and a wireless communication module 24; the input end of the cutoff ring 21 is installed at the tail end of an insulator porcelain insulator on a high-voltage transmission line tower, the output end of the cutoff ring 21 is connected with the input end of the signal conditioning and converting unit 22, and the output end of the signal conditioning and converting unit 22, the processor unit 23 and the wireless communication module 24 are sequentially connected.
In the implementation, the current intercepting ring 21 is installed on the surface of the insulator sheet of the insulator string to be tested, which is closest to the tower, and the leakage current on the surface of the insulator is intercepted, so that the copper ring is fully contacted with the surface of the insulator, and the conductive adhesive is coated during installation, and the fixing function is also achieved. The intercepted leakage current is led to the input end of the signal conditioning and converting unit 22 through the shielding stranded wire, and after the signal conditioning and converting unit 22 is controlled by the processor unit 23 to process, the signal is sent to the wireless communication module 24. The processor unit 23 adopts a DSP digital signal processor, and controls the data acquisition, the signal conditioning and converting unit 22 and the wireless communication module 24. The wireless communication module 24 is a universal transparent wireless transmission module, the carrier frequency is 433MHZ, the interface baud rate is 9600bps, the format is 8N1, data transmission is performed according to a preset communication protocol, the maximum transmission distance is 800m, and a serial communication mode is adopted to be responsible for receiving and transmitting data and instructions between the current collection terminal 1 and the monitoring base station 3.
Refer to fig. 4. Fig. 4 is an electrical schematic diagram of the signal conditioning and converting unit of the current collecting terminal in the embodiment of the on-line monitoring system for leakage current of the insulator of the present invention. As shown in the figure, the signal conditioning and converting unit 22 includes a low-pass filter circuit 221, a high-pass filter circuit 222, a secondary amplification circuit 223, an absolute value circuit 224, an AD converting unit 225, and a high-frequency current pulse capturing unit (226). The input ends of the low-pass filter circuit 221 and the high-pass filter circuit 222 are connected to the output end of the cutoff ring 21, the output end of the low-pass filter circuit 221, the secondary amplifier circuit 223, the absolute value circuit 224 and the AD conversion unit 225 are sequentially connected, the output end of the high-pass filter circuit 222 is connected to the input end of the high-frequency current pulse capture unit 226, and the output end of the AD conversion unit 225 and the output end of the high-frequency current pulse capture unit 226 are connected to the processor unit 23.
In an implementation, the low-pass filter circuit 221 and the high-pass filter circuit 222 are used for separating two types of signal resistive leakage current and high-frequency pulse current. The secondary amplification circuit 223 is an amplification circuit with a gain of 10 times, which is composed of operational amplifiers, and secondarily amplifies the power frequency current signal to improve the sensitivity and linearity of the measurement device. The absolute value circuit 224, in combination with the AD conversion unit 225, can increase the range of input voltage and increase the measurement range of leakage current. The high-frequency current pulse capturing unit 226 is used for capturing a high-frequency pulse with a frequency of tens of mhz, and accurately recording the number of leakage current pulses with different amplitudes.
The wireless communication network 3 is a communication mode between the current acquisition terminal 2 and the monitoring base station 4, is transmitted by a wireless communication module with micropower, has the maximum transmitting power of 17dBm and the carrier frequency of 433MHz, provides a transparent data interface, can adapt to any standard or non-standard user protocol, automatically shields external interference data, and has strong anti-interference performance.
The technical indexes of the embodiment are as follows:
(1) working environment
Temperature: -40 ℃ to +85 ℃
Humidity: 0% RH to 100% RH
(2) Measuring range
Leakage current measurement range: 0 to 100mA
(3) Measurement accuracy
The leakage current is less than or equal to +/-1 percent
(4) Other technical indicators
The continuous power supply time of the storage battery: for more than 10 years
Through the analysis, it can be seen that the embodiment of the utility model has the following characteristics:
(1) the current acquisition terminal is used as a monitoring sensor, transmits acquired data to a base station through a wireless communication network, monitors leakage current on line in real time, reflects the pollution condition on the surface of an insulator in operation in real time, and transmits field measured data and early warning/alarm information to the monitoring base station through a wireless communication mode; therefore, the embodiment enables online monitoring to be more convenient, accurate and reliable, and remote real-time online monitoring in the real sense is realized.
(2) The embodiment conforms to the related technical standard (Q/GDW 245-2008) of the state and power grid company, the technical specification and compatibility are strong, and data can be shared.
(4) The present embodiment adopts a high reliability system design, is resistant to low temperature and strong electromagnetic interference, and has strong environmental adaptability.
(5) The wireless communication module that this embodiment adopted is small, and the low power dissipation, the interference killing feature is strong, and transmission distance is far away, and the reliability is high, satisfies the design demand.
(6) The embodiment can be detached and moved, and can be conveniently installed at a temporary use place.
The above detailed description is made on the insulator leakage current online monitoring system provided by the present invention, and the principle and the implementation mode of the present invention are explained by applying the specific embodiments herein, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present description should not be construed as a limitation of the present invention.
Claims (8)
1. An insulator leakage current on-line monitoring system, characterized by includes:
the device comprises a power supply device (1), a current acquisition terminal (2) and a monitoring base station (4);
the power supply device (1) is directly connected with the current acquisition terminal (2), and the current acquisition terminal (2) is connected with the monitoring base station (4) through a wireless communication network (3).
2. The on-line monitoring system of claim 1,
the power supply device (1) comprises a storage battery (11) and a power supply management module (12) which are connected; and,
the output end of the power supply management module (12) is connected with the current acquisition terminal (2).
3. The on-line monitoring system of claim 2,
the current acquisition terminal (2) comprises a cutoff ring (21), a signal conditioning and converting unit (22), a processor unit (23) and a wireless communication module (24);
the input end of the cutoff ring (21) is arranged at the tail end of an insulator porcelain bottle of a power transmission line tower, the output end of the cutoff ring (21) is connected with the input end of the signal conditioning and converting unit (22), and the output end of the signal conditioning and converting unit (22), the processor unit (23) and the wireless communication module (24) are sequentially connected.
4. The on-line monitoring system of claim 3,
the signal conditioning and converting unit (22) comprises a low-pass filter circuit (221), a high-pass filter circuit (222), a secondary amplification circuit (223), an absolute value circuit (224), an AD converting unit (225) and a high-frequency current pulse capturing unit (226); wherein,
the input end of the low-pass filter circuit (221) and the input end of the high-pass filter circuit (222) are both connected with the output end of the cutoff ring (21), and the output end of the low-pass filter circuit (221), the secondary amplification circuit (223), the absolute value circuit (224) and the AD conversion unit (225) are sequentially connected;
the output end of the high-pass filter circuit (222) is connected with the input end of the high-frequency current pulse capturing unit (226); and
the output end of the AD conversion unit (225) and the output end of the high-frequency current pulse capture unit (226) are both connected with the processor unit (23).
5. An on-line monitoring system according to claim 3 or 4,
the processor unit (23) is a DSP digital signal processor.
6. The on-line monitoring device of claim 5, wherein:
the wireless communication module (24) is based on a serial communication mode, the carrier frequency is 433MHZ, the interface baud rate is 9600bps, the format is 8N1, and the maximum transmission distance is 800 m.
7. The on-line monitoring system of claim 1,
the maximum transmitting power of the wireless communication network (3) is 17dBm, and the carrier frequency is 433 MHz.
8. The on-line monitoring system of claim 1,
the monitoring base station (4) is arranged on the power transmission line tower, is connected with the current acquisition terminal (2) through the wireless communication network (3) and is used for receiving and transmitting the acquired leakage current and related calculation data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220247817 CN202720299U (en) | 2012-05-29 | 2012-05-29 | Insulator leakage current on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220247817 CN202720299U (en) | 2012-05-29 | 2012-05-29 | Insulator leakage current on-line monitoring system |
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| Publication Number | Publication Date |
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| CN202720299U true CN202720299U (en) | 2013-02-06 |
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| CN 201220247817 Expired - Lifetime CN202720299U (en) | 2012-05-29 | 2012-05-29 | Insulator leakage current on-line monitoring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558492A (en) * | 2013-10-30 | 2014-02-05 | 北京交通大学 | Electric transmission line insulator online fault locating system based on Zigbee |
| CN105242144A (en) * | 2015-10-23 | 2016-01-13 | 安徽师范大学 | Power transmission circuit current state on-line monitoring system and method |
| CN105891688A (en) * | 2016-04-12 | 2016-08-24 | 苏州寅泽缕弦电子技术有限公司 | Insulator detection device |
| CN106443309A (en) * | 2016-11-24 | 2017-02-22 | 中国矿业大学 | Online monitoring system for leakage current of contaminated insulator |
| CN106646001A (en) * | 2017-03-06 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | Corrosion charge quantity detecting device for DC insulator metal accessory |
-
2012
- 2012-05-29 CN CN 201220247817 patent/CN202720299U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558492A (en) * | 2013-10-30 | 2014-02-05 | 北京交通大学 | Electric transmission line insulator online fault locating system based on Zigbee |
| CN103558492B (en) * | 2013-10-30 | 2016-03-23 | 北京交通大学 | The online fault location system of a kind of electric transmission line isolator based on Zigbee |
| CN105242144A (en) * | 2015-10-23 | 2016-01-13 | 安徽师范大学 | Power transmission circuit current state on-line monitoring system and method |
| CN105891688A (en) * | 2016-04-12 | 2016-08-24 | 苏州寅泽缕弦电子技术有限公司 | Insulator detection device |
| CN106443309A (en) * | 2016-11-24 | 2017-02-22 | 中国矿业大学 | Online monitoring system for leakage current of contaminated insulator |
| CN106646001A (en) * | 2017-03-06 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | Corrosion charge quantity detecting device for DC insulator metal accessory |
| CN106646001B (en) * | 2017-03-06 | 2023-09-08 | 云南电网有限责任公司电力科学研究院 | Corrosion charge amount detection device for direct-current insulator metal accessory |
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Granted publication date: 20130206 |