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A DC converter valve valve control system and its switching control method and device

A technology of DC converter valve and valve control system, which is applied in the direction of output power conversion device, conversion of AC power input to DC power output, power transmission AC network, etc. Transmission system stability and other issues to achieve the effect of reducing the possibility of tripping, improving reliability and stability, and reliable switching

Active Publication Date: 2021-12-24
XUJI GRP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a DC converter valve valve control system and its switching control method and device to solve the problem of insufficient sub-module redundancy in the switching process of the current converter valve valve control system, which affects the stability of the DC power transmission system sexual problems

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  • A DC converter valve valve control system and its switching control method and device
  • A DC converter valve valve control system and its switching control method and device

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Embodiment Construction

[0021] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] Embodiment of valve control system for DC converter valve

[0023] The DC converter valve control system of the present invention includes two redundant valve control systems. If the vertical communication between the currently running valve control system and the other valve control system is normal, and the commutation of the other valve control system If the number of failures of the valve sub-modules is less than the redundant number of converter valve sub-modules, the other valve control system is an effective system that can be applied for use, and the vertical communication includes the communication between the control box and the interface box of the valve control system. Communication and communication between the interface chassis and the converter valve sub-module; if the number of faults of the converter valve sub-module ...

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Abstract

The invention relates to a valve control system of a direct current converter valve and a switching control method and device thereof, belonging to the technical field of direct current transmission. The present invention switches the valve control system by judging the longitudinal communication status of the valve control system and whether the number of faulty converter valve sub-modules is less than the redundant number of converter valve sub-modules. The switching control process takes into account the communication status of the valve control system, The relationship between the number of faults of converter valve sub-modules and the redundant sub-modules and the communication between the sub-modules and the valve control system can realize accurate and reliable switching of the valve control system and make full use of the redundancy and sub-modules of the valve control system. The advantage of module redundancy, while reducing the possibility of system tripping, improves the reliability and stability of the valve control system.

Description

technical field [0001] The invention relates to a valve control system of a direct current converter valve and a switching control method and device thereof, belonging to the technical field of direct current transmission. Background technique [0002] Modular multilevel flexible DC transmission (MMC-HVDC) is a new high-voltage DC transmission technology based on Voltage Sourced Converters (VSC) technology. In addition to the advantages of traditional high-voltage direct current transmission, the flexible direct current transmission system can also directly supply power to long-distance small isolated loads, connect decentralized power sources, and have flexible and changeable operation control methods, which can reduce the voltage drop and flicker of transmission lines and improve power quality. Therefore, flexible DC transmission technology has high application value in island power supply, urban power grid power supply, distributed energy grid connection, etc. [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36H02M1/32H02M7/00
CPCH02J3/36H02M1/32H02M7/00H02M1/325Y02B70/10Y02E60/60
Inventor 胡四全秦鸿瑜董朝阳俎立峰吉攀攀慕小乐陈堃李君马俊杰陈同浩孟学磊裴杰才冯敏马太虎张振兴王晓丽蒋晶
Owner XUJI GRP
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