High-voltage capacitor bank branch current monitoring device

A technology of high-voltage capacitors and branch currents, applied in instruments, using digital measurement technology for measurement, signal transmission systems, etc., can solve the problems of monitoring device power supply, energy acquisition, communication, etc. achieve simple effects
CN101769958AInactive Publication Date: 2010-07-07BEIJING HUAAN YUANDA INTELLIGENT ELECTRICAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING HUAAN YUANDA INTELLIGENT ELECTRICAL CO LTD
Publication Date
2010-07-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a high-voltage capacitor bank branch current monitoring device, comprising a self-excitation energy obtaining and power converting circuit, a current detection and acquisition circuit, a CPU data acquisition and controlling circuit and a wireless transceiving circuit, the self-excitation energy obtaining and power converting circuit obtains energy from the high-voltage line and converts and outputs direct voltage; and the current detection and acquisition circuit collects current instantaneous value, and outputs to the CPU data acquisition and controlling device, which is used for finishing branch unbalanced current AD alternating current sampling, current harmonic calculation and finishing bidirectional wireless digital transmission via the wireless transceiving circuit. The monitoring device solves the problem of monitoring protection of a capacitor bank under high potential, discloses the damage mechanism of the capacitor bank by taking the branch unbalanced current and harmonic distribution in the fault process of the capacitor bank as the analysis basis, thus reducing fault rate of the capacitor bank and having significant meanings in improving power grid safe operation level and economic efficiency.
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Description

technical field

[0001] The invention relates to the technical field of current monitoring, in particular to a wireless monitoring device for branch current of a high-voltage capacitor bank under a high-voltage suspension potential applied in a power system. Background technique

[0002] With the implementation of my country's power grid west-east power transmission, north-south mutual supply and national networking strategy, the construction of power grids has been continuously strengthened. In order to improve the stability of the power grid, increase the transmission capacity of the line, and enhance the short-circuit current level of the power grid, the series compensation capacitor device, the dynamic reactive power compensation technology of the power grid and the short-circuit fault current limiting technology are increasingly valued by all parties, and some large-scale power grids are planning and construction of such projects.

[0003] Among them, the capacitor bank...

Claims

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