Fault switching system and method for valve control system protection device of flexible direct-current converter valve

A technology of protection device and valve control system, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as unhealthy valve control system, avoid malfunction of valve control system, avoid frequent switching of board failures, and ensure safe operation. Effect

Active Publication Date: 2020-07-17
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the valve control system in the prior art is in an unhealthy operating state for a long time due to the manual intervention of operation and maintenance personnel or the autonomous control of the valve control system when the valve control protection system fails, the present invention provides a flexible DC converter valve Control system

Method used

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  • Fault switching system and method for valve control system protection device of flexible direct-current converter valve
  • Fault switching system and method for valve control system protection device of flexible direct-current converter valve

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Embodiment

[0033] A fault switching system for the protection device of a flexible DC converter valve valve control system, which includes two sets of redundant flexible direct converter valve control systems, each of which includes a set of independent flexible direct converter valve control systems Valve "three out of two" protection device, each set of flexible straight converter valve "three out of two" protection device is equipped with three protection boards and an outlet board, the outlet board is used to output the protection action signal, three out of two protection System configuration such as figure 1 As shown, in order to ensure the reliable detection of the current of the flex-straight converter valve (6 bridge arms) by the valve control protection system, each bridge arm divides the bridge arm current into 3 channels and simultaneously connects it to the “three out of two” protection system. Among the three protection boards, when at least 2 currents of each bridge arm reac...

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Abstract

The invention discloses a fault switching system and method for a valve control system protection device of a flexible direct-current converter valve, and relates to the field of. fFlexible direct-current DC power transmission field, the system. The fault switching system comprises two sets of redundant flexible direct-current converter valve control systems, each set of flexible direct-current converter valve control system comprises a set of independent flexible direct-current converter valve two-out-of-three protection device, each set of flexible direct-current converter valve two-out-of-three protection device is provided with three protection board cards and an outlet board card, and the outlet board cards are used for outputting protection action signals. Reasonable switching is carried out through the fault switching system according to different protection device fault conditions, a manual intervention function is added on the basis of preferentially carrying out autonomous judgment through the valve control system, and safe and reliable operation of the valve control system is guaranteed.

Description

Technical field [0001] The invention relates to the field of flexible direct current power transmission, in particular to a failure switching system and method of a flexible direct current converter valve valve control system protection device. Background technique [0002] Modular multilevel converter-based HVDC transmission (modular multilevel converter based HVDC, MMC-HVDC) does not require reactive power compensation, has no commutation failure problems, is easy to adjust active and reactive power, and has low harmonic levels. The advantages make this technology It has been widely used in the power field. At present, a number of flexible straight projects have been put into operation or under construction in China, such as the Zhoushan five-terminal flexible DC, Xiamen flexible DC, Luxi back-to-back DC, Yu-E multi-terminal flexible DC, and Baihetan multi-terminal flexible DC under construction. Udonde multi-terminal hybrid DC and so on. With the continuous verification duri...

Claims

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Application Information

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IPC IPC(8): H02H7/12
CPCH02H7/12Y02E60/60
Inventor 焦石杨学广郑星星徐攀腾宋述波梁家豪梁秉岗严海健朱博李建勋邓健俊王晨涛王慧泉严治勇叶鑫殷耀宗
Owner GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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