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

A technology for protection devices and valve control systems, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve problems such as unhealthy valve control systems, and achieve the goal of avoiding misoperation of valve control systems, frequent switching of board failures, and safe operation Effect

Active Publication Date: 2022-05-17
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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  • Claims
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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 protection device failure switching system and method, use the failure switching system to perform reasonable switching through different protection device failure conditions, increase the function of manual intervention on the basis of prioritizing the independent judgment of the valve control system, and ensure the safe and reliable operation of the valve control system

Method used

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

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Embodiment

[0033] A protection device failover system for a flexible DC converter valve valve control system, including two sets of redundant DC converter valve valve control systems, each of which includes an independent DC converter valve control system Valve "two out of three" protection device, each set of "two out of three" protection device for flexible DC valves is equipped with three protection boards and one outlet board, the outlet board is used to output protection action signals, three out of two protection System configuration such as figure 1 As shown, in order to ensure that the valve-controlled protection system can reliably detect the bridge arm current of the flexible DC converter valve (6 bridge arms), each bridge arm divides the bridge arm current into 3 channels and simultaneously connects it to the "two out of three" protection system. Among the three protection boards, when at least two currents of each bridge arm reach the set value of the protection action, the p...

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Abstract

The invention discloses a fault switching system and method for a protection device of a flexible DC converter valve valve control system, and relates to the field of flexible DC power transmission. The valve control system of the converter valve includes a set of independent "two out of three" protection devices for the flexible DC converter valve. A board, the outlet board is used to output protection action signals. The present invention utilizes the failover system to perform reasonable switchover according to different failure conditions of the protection device, and adds the function of manual intervention on the basis of prioritizing the independent judgment of the valve control system, so as to ensure the safe and reliable operation of the valve control system.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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