Direct-current partial discharge testing system and method for extra-high-voltage power transmission and transformation equipment

Abstract

The invention discloses a direct-current partial discharge testing system for extra-high-voltage power transmission and transformation equipment. The direct-current partial discharge testing system comprises a direct-current partial discharge measurement module, a direct-current high voltage generator module for partial discharge measurement and a non-partial-discharge and partial-discharge coupling module for partial discharge measurement which are electrically connected. In the system, a hardware pipeline formed by a CPLD chip and an FIFO memory chip runs synchronously at the high speed of A / D sampling, so it is guaranteed that a hardware system is able to read while carrying out high-speed sampling under the condition that main waveform data of partial discharge is retained, thereby realizing long-term continuous storage and analysis of partial discharge data. In addition, a windows platform mass memory is used to cache the partial discharge data read from the FIFO memory chip, so as to meet the need of follow-up processing.

Description

technical field [0001] The present invention relates to the technical field of discharge test systems, and more specifically relates to a DC partial discharge test system and method for UHV power transmission and transformation equipment. Background technique [0002] With the development of UHVDC engineering construction, the insulation structure of the converter becomes more and more complex. According to the standards of GB7354-2003, IEC60076 and IEC60270, the converter converters have been subjected to corresponding insulation tests and assessments in the manufacturing plant, but after the converter converters have been transported and installed on site, there is no assessment method in the converter station, and currently only DC can be used. Leakage current test, and this kind of test is a macroscopic assessment, the insulation condition of the converter valve side cannot be truly reflected, so its reliability and safety cannot be guaranteed. [0003] Partial discharg...

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Problems solved by technology

[0004] The embodiment of the present invention provides a DC partial discharge test system and method for UHV power transmission and transformation equipment, which is used to solve the problem that the current discharge test system can only perform DC leakage current tests in the prior art and cannot obtain reliability and safety. Warranty question

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