1. Static voltage sharing technology of multi-break mechanical switch for hybrid HVDC breaker
- Author
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Qiuyu Yang, Daochun Huang, Xuezong Wang, Zhibin Qiu, and Jiangjun Ruan
- Subjects
HVDC power transmission ,finite element analysis ,voltage distribution ,circuit breakers ,capacitance ,static voltage sharing technology ,multibreak mechanical switch ,hybrid HVDC breaker ,high-voltage direct current breaker ,serially connected interrupter units ,static voltage distribution characteristics ,voltage sharing design ,mechanical switching ,power electronics switching ,finite-element model ,static voltage distribution ,capacitance parameters ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The hybrid high-voltage direct current (HVDC) breaker combines mechanical and power electronics switching that enables it to interrupt power flows within a few milliseconds. Mechanical switch is a key component of hybrid HVDC breaker and has a number of serially connected interrupter units which ideally would divide the voltage equally. The static voltage distribution characteristics and voltage sharing design of a multi-break mechanical switch were discussed in this study. A finite-element model was developed to study the static voltage distribution characteristics and capacitance parameters of multi-break mechanical switch (which actually consists of resistance and capacitance parameters under direct current) as a preliminary study. Comparisons were made under the simulation of vertical and U-shaped arrangement forms. The results indicate that the static voltage distribution of the high-voltage terminal is at least more than 65%, whereas the severe non-uniform voltage distribution can be well improved by means of the method proposed in this study.
- Published
- 2019
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