Research on Application of Circuit Breaker Controlled Switching System in Converter Station
The controlled switching system of circuit breaker are equipped in the filter bank and converter transformer of the converter station,which can improve the opening and closing transient process of circuit breaker and avoid the impact on power equipment and system under the condition of canceling closing resistance.Based on the implementation and debugging experience of several converter station controlled switching projects,a survey on the application of controlled switching system in converter stations is carried out.The composition of controlled switching system,controlled switching requirements,circuit breaker matching and pretesting methods,etc.are introduced.Focusing on the application of controlled switching for filter banks and converter transformers,the control strategy,the impact test of controlled switching system,the problems to be paid attention to in the use of the project,and the requirements for the operation and maintenance of the equipment,etc.are summarized to provide references for the relevant technical personnel.The pilot project innovative adopts the special transformation program of eliminating closing resistance and adding phase selective closing in ultra high voltage circuit breakers.The overall operation effect of the breaker controlled switching system is good,which has accumulated engineering operation experience for the popularization of the technology.
Converter stationFiltersConverter transformerHigh voltage/ultra high voltage direct current transmissionTransient shockControlled switching
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