Cable ground connection remote monitoring method and remote monitoring system
A technology of remote monitoring and cable grounding, which is applied in the direction of measuring electricity, measuring electrical variables, and measuring devices. It can solve the problems of affecting the economic benefits of power supply enterprises, the high risk factor of live line inspection, and affecting industrial and agricultural production. Short, less line voltage hazards, reliable performance
Inactive Publication Date: 2013-09-04
STATE GRID CORP OF CHINA +1
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Problems solved by technology
At this time, with such a long line and many branches, it is difficult for the management personnel of the power supply line to find out where the grounding occurred. The risk factor of live line inspection is large and the time is long. , power outages for important users will cause greater losses and adverse effects and affect the economic benefits of power supply companies
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[0024] As shown in Figures 1, 2, and 3, a cable grounding remote monitoring system includes: zero-sequence current transformer, small current grounding detection circuit, radio transmitter, radio receiving controller, modem, power supply, distribution network automation, Solar power supply and UPS power supply, the zero-sequence current transformer fixed on the 0.4KV-35KV field branch cable is connected to the radio transmitter through a small current grounding detection circuit, and the radio transmitter is wirelessly connected to the radio receiving controller through the antenna , the output of the radio receiving controller is connected to the sound and light alarm, and the radio receiving controller is connected to the distribution network automation through a modem;
[0025] Among them, the small current grounding detection circuit and the power terminal of the radio transmitter are connected with the solar power supply; among them, the radio receiving controller, modem, ...
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The invention relates to the technical field of power monitoring systems and discloses a cable ground connection remote monitoring method and remote monitoring system. The remote monitoring system is provided with a zero sequence current mutual inductor, wherein the zero sequence current mutual inductor is fixed on a 0.4KV-35KV wild branch power distribution cable and is connected with a wireless current sender through a low-current ground connection detection circuit, the wireless current sender is in wireless connection with a wireless reception controller through an antenna, the output end of the wireless reception controller is connected with an audible and visual alarm, and the wireless reception controller is connected with a distribution network through a modulator demodulator in an automation mode. The remote monitoring system can shorten working time when a line controller inspects the line and deals with ground connection, workloads are reduced, in the process of the ground connection, hazards caused by line voltage to a two-phase device are relieved, service life of the device is prolonged, a current mutual inductor, a potential transformer and ferromagnetic resonance time are reduced, most notably, risks of life safety of line checking personnel with power and personnel nearby the ground connection point are reduced, and the remote monitoring system has the advantages of being large in adaptable voltage range, low in cost, convenient to implement and capable of achieving resource sharing, and the automation level of the distribution network is improved.
Description
technical field [0001] The invention relates to the technical field of power monitoring systems, in particular to a cable grounding remote monitoring method and a remote monitoring system. Background technique [0002] At present, the 6KV, 10KV, 35KV and 66KV distribution lines in the power plant of the substation switch station are the main components of the power system. The neutral points of transformers and generators in systems of these voltage levels are ungrounded or grounded through arc suppression coils and resistors for power transmission and distribution. And there are multiple output distribution lines connected on the busbar of the same voltage level. Now, with the development of civilized society, urbanization and community-based development needs are required. In order to improve the reliability of power supply, the urban area also implements distribution network ring network power supply. There are many branches on a distribution line, which are erected acco...
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IPC IPC(8): G01R31/02
Inventor 卢会东陈永昌张洋洋张旭李晓霞杨文豪许冬冬刘强牛天峰卢科峰吴蓉
Owner STATE GRID CORP OF CHINA