Method and device for online monitoring power station and substation grounding grid

A substation grounding grid and grounding grid technology, which is applied in the direction of grounding resistance measurement, fault location, etc., can solve the problems of inability to realize online monitoring, inconvenient regular detection, and heavy equipment, so as to achieve accurate measurement, improve precision, and overcome heavy workload. Effect

Inactive Publication Date: 2007-09-12
HUNAN UNIV
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Problems solved by technology

[0004] In order to overcome the technical problems that the existing grounding grid corrosion detection equipment is bulky, inconvenient for regular detection, and unable to realize on-line monitoring, the present invention provides a high-precision, easy-to-use online monitoring method and device for the grounding grid of power and substations

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  • Method and device for online monitoring power station and substation grounding grid
  • Method and device for online monitoring power station and substation grounding grid
  • Method and device for online monitoring power station and substation grounding grid

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Embodiment Construction

[0022] Referring to Fig. 1, Fig. 1 is a structural diagram of an on-line monitoring device for a grounding grid of a power substation according to the present invention. The monitoring device includes a state sensor, a signal source, a control switch, a comparative amplifier, an operational amplifier 1, a power amplifier, an operational amplifier 2, an operational amplifier 3, an operational amplifier 4, a differential amplifier, a resistance measuring device, and a converter A / D 1 , Converter A / D 2 , Converter A / D 3 , Converter A / D 4 , single chip microcomputer, converter D / A 1 , Converter D / A 2 , filter, photoelectric switch. The signal source adopts a square wave generator with continuously adjustable amplitude and frequency. The comparison amplifier, power amplifier, sampling resistor, operational amplifier 2 and state sensor constitute the steady-state measurement part of the system. Operational amplifier 1, power amplifier, sampling resistor And the state sensor con...

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Abstract

This invention discloses an on-line monitoring method of grounding net of power station and its device. The method includes following steps: bury state transmitter in soil where have station earthing net; survey electric resistance of transmitter electrode and self corrosion electric potential; add square wave signal to electrode of state transmitter, survey electric current; after smoothing surveyed data, deliver to microprocessor to compute corrosion rate of electrode, take it as corrosion rate of grounding electrode in corresponding area; use corrosion rate to compute corrosion deep and actual geometry size of grounding electrode of grounding net, and use computing method of grounding net numerus to compute electricity performance parameter of grounding net; compare computed electricity performance parameter and design value, judge safe performance of grounding net. This invention can do online monitoring to corrosion deep and electricity performance parameter of grounding net of power station. The invention provides a overall, effective, economic, real time solving method to survey and evaluate grounding net of power station.

Description

technical field [0001] The invention relates to a grounding grid monitoring method, in particular to an on-line monitoring method and device for a power substation grounding grid. Background technique [0002] The substation grounding grid plays an important role in the reliable operation of the power system and the personal safety of the staff. However, due to the widespread corrosion of grounding devices, the cross-section of the grounding body is reduced and the electrical performance is deteriorated, which directly endangers the safe and stable operation of the power grid. Therefore, it is very urgent for the maintenance of the grounding device to carry out online monitoring of the status of the grounding grid, keep abreast of the corrosion of the grounding electrode in the soil and the electrical performance of the grounding grid, and find problems early to take corresponding protective measures to prevent problems before they happen. and important. [0003] However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R27/20
Inventor 彭敏放李素芳王光荣刘聪利洪海涛
Owner HUNAN UNIV
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