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A high-voltage electrical equipment grounding current on-line monitoring device and monitoring method

A technology for high-voltage electrical equipment and grounding current, which is applied in measuring devices, measuring current/voltage, measuring electrical variables, etc., and can solve the problems of accuracy, accuracy to be improved, low measurement accuracy, and imperfect functions, and achieve trigger accuracy. Enhancement, large measurement range, avoid false triggering effect

Active Publication Date: 2016-01-20
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0002] On-line monitoring of the grounding current of high-voltage electrical equipment plays a vital role in the normal operation of the power grid. The measurement data of existing products for testing it is relatively simple, and the accuracy and precision of the measurement need to be improved.
The functions of similar products are not perfect, and the test parameters of the test points cannot meet the requirements of this product
The measurement accuracy of the original product is low, the measurement range is relatively limited (smaller range), the recording range of the number of high current (lightning strike) shocks is small, the count of high current (lightning strike) shocks is inaccurate and the operating status is unknown

Method used

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  • A high-voltage electrical equipment grounding current on-line monitoring device and monitoring method

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] Such as figure 1 As shown, an online monitoring device for grounding current of high-voltage electrical equipment, including a large current impact counting device and a current detection device for electrical connection;

[0037] The large current impact counting device includes an electrically connected energy storage transformer and a large current signal acquisition transformer. The coil turns ratio of the energy storage transformer is 500:1, and the coil turn ratio of the high current signal acquisition transformer is 50:1. A rectifier module and an energy storage module are sequentially connected to the energy storage transformer, a trigger module, a counting module and a display module are sequentially connected to the high current signal acquisition transformer, the energy storage module is connected to the counting module, the t...

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Abstract

The invention discloses a high-voltage electrical equipment grounding current on-line monitoring device comprising a heavy current impact counting apparatus and a current detection apparatus which are simultaneously in electrical connection with a grounding terminal of high-voltage electrical equipment. The heavy current impact counting apparatus comprises an energy storage mutual inductor and a heavy current signal acquisition mutual inductor which are in electrical connection. The energy storage mutual inductor is in electrical connection with a grounding terminal of high-voltage electrical equipment. The energy storage mutual inductor is sequentially connected to a first rectification module and an energy storage module. The heavy current signal acquisition mutual inductor is sequentially connected to a trigger module, a counting module and a display module. The energy storage module is also connected to the counting module. The trigger module is in electrical connection with the energy storage module. The current detection apparatus comprises a current detection mutual inductor which is in electrical connection with a grounding terminal of the high-voltage electrical equipment. The current detection mutual inductor is sequentially connected to a second rectification module and a gaugehead display module. The invention also discloses a monitoring method for the above apparatus. The high-voltage electrical equipment grounding current on-line monitoring device is passive, and is free from internal resistance and high in precision.

Description

technical field [0001] The invention relates to an on-line monitoring device and a monitoring method for grounding current of high-voltage electrical equipment. Background technique [0002] On-line monitoring of the grounding current of high-voltage electrical equipment plays a vital role in the normal operation of the power grid. The measurement data of existing products for testing it is relatively simple, and the accuracy and precision of the measurement need to be improved. The functions of similar products are not perfect, and the test parameters of the test points cannot meet the requirements of this product. The measurement accuracy of the original product is low, the measurement range is relatively limited (smaller range), the recording range of the number of high current (lightning strike) shocks is small, the count of high current (lightning strike) shocks is inaccurate, and the operating status is unknown. [0003] The high-current signal acquisition transformer...

Claims

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Application Information

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IPC IPC(8): G01R19/17G01R19/00
Inventor 饶思传谢正汉尚雪嵩顾金国张加跃汤迎春赵勇任乔林张路李芳亚侯俊杨帆张晓华魏素芬冯文祝丹张家孝
Owner STATE GRID CORP OF CHINA
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