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

Inactive Publication Date: 2010-07-07
BEIJING HUAAN YUANDA INTELLIGENT ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of the prior art, the present invention provides a high-voltage capacitor bank branch current monitoring device to solve many problems in the prior art, such as power supply and energy acquisition, anti-interference, and communication with ground equipment of the monitoring device.

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  • High-voltage capacitor bank branch current monitoring device
  • High-voltage capacitor bank branch current monitoring device
  • High-voltage capacitor bank branch current monitoring device

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specific Embodiment approach

[0029] The invention provides a high-voltage capacitor bank branch current monitoring device. The specific embodiment of the present invention is as follows:

[0030] As the primary equipment responsible for the main functions of series compensation device, dynamic reactive power compensation device and series resonance type fault current limiting device, the performance of capacitor bank determines the operation reliability of the device, and it is the key component that needs protection most.

[0031] The capacitor bank is generally composed of capacitor units, and the capacitor unit is formed by connecting multiple capacitors in series and in parallel. The operation of the capacitor bank should not be affected by the fault of a single capacitor. When the capacitor element inside the unit capacitor bank breaks down due to overvoltage or the fuse blows, the capacitor element is out of operation, thereby reducing the equivalent capacitance of the capacitor bank unit. This red...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25G08C17/02
Inventor 唐宗华宣黎鑫
Owner BEIJING HUAAN YUANDA INTELLIGENT ELECTRICAL CO LTD
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