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Device for measuring arc voltage of direct current circuit breaker

A technology for DC circuit breakers and measuring devices, which is applied in the direction of measuring devices, circuit breaker testing, measuring current/voltage, etc., can solve the problems of inaccurate arc voltage measurement, high voltage, etc., and achieve the goal of avoiding burning the terminal measuring equipment, accurate The effect of high performance and simple structure

Inactive Publication Date: 2012-05-02
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Patent No. ZL201020137881.9, a utility model titled "on-line monitoring device for mechanical characteristics of high-voltage circuit breakers" discloses an online monitoring device for circuit breakers, which uses Hall devices to monitor the voltage and current of circuit breakers online However, due to the high voltage (up to 100kV or more) between the switch fractures of the DC circuit breaker when the DC is broken, the existing circuit breaker voltage and current monitoring device using Hall devices cannot accurately measure the arc voltage between the fractures

Method used

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  • Device for measuring arc voltage of direct current circuit breaker
  • Device for measuring arc voltage of direct current circuit breaker

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Embodiment Construction

[0018] like figure 1 As shown, the measuring device for the arc voltage of a DC circuit breaker includes: a measured arc voltage input terminal, a measurement terminal, a resistance-capacitance voltage divider module connected in series with the measured arc voltage input terminal, and an overvoltage voltage divider connected in series with the measurement terminal A protection module; the measured arc voltage input terminal, the resistance-capacitance voltage divider module, the overvoltage protection module and the measurement terminal are connected in series in sequence.

[0019] The RC voltage divider module includes a primary part and a secondary part; the primary part and the secondary part are connected in series; the primary part includes a high-voltage arm capacitor (C1) and a high-voltage arm resistor (R1), and the high-voltage arm The capacitor (C1) is connected in parallel with the high-voltage arm resistor (R1); the secondary part includes a low-voltage arm capaci...

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Abstract

The invention provides a device for measuring the arc voltage of a direct current circuit breaker. The device comprises a to-be-measured arc voltage input terminal, a measurement terminal, a resistive-capacitive voltage divider module in serial connection with the to-be-measured arc voltage input terminal, and an over-voltage protection module in serial connection with the measurement terminal, wherein the to-be-measured arc voltage input terminal, the resistive-capacitive voltage divider module, the over-voltage protection module and the measurement terminal are connected successively in series. The device for measuring the arc voltage of the direct current circuit breaker disclosed by the invention can accurately measure the arc voltage between fractures of the direct current circuit breaker, and has the characteristic of simple structure and is easy to realize.

Description

technical field [0001] The invention belongs to a power electronic device, in particular to a measuring device for the arc voltage of a DC circuit breaker. Background technique [0002] The DC circuit breaker is one of the most important equipment in the DC system. The DC circuit breaker is used for DC system operation mode conversion or fault removal, including metal return transfer breaker (MRTB), ground return transfer switch (GRTS), etc. [0003] There are more and more applications of DC circuit breakers in the field of DC transmission and distribution, such as high-voltage direct current transmission, subway traction, etc. In order to realize the engineering design and effectively ensure the reliability of the project, it is very important to study the arc characteristics when the DC circuit breaker breaks the DC. Therefore, in the research and development test of the DC circuit breaker, it is necessary to accurately measure the arc current and arc voltage. Currently,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R31/327G01R1/36
Inventor 周军川温家良王秀环张堃于坤山李跃
Owner CHINA ELECTRIC POWER RES INST
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