1. Study on voltage distribution characteristic of a 363 kV fast multi‐break vacuum circuit breaker
- Author
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Huang Yongning, Li Xing, Fan Yiping, Ai Shaogui, Yu Xiao, and Yang Fan
- Subjects
Materials science ,high-voltage power system ,power system CAD ,fast multibreak vacuum circuit breaker ,Energy Engineering and Power Technology ,vacuum circuit breakers ,finite element analysis ,distributed capacitance parameters ,three series connected platforms ,stray capacitor analysis ,01 natural sciences ,Capacitance ,010305 fluids & plasmas ,law.invention ,voltage distribution characteristics ,Electric power system ,law ,capacitance 10.0 nF ,voltage 363.0 kV ,modularised hexa-break VCB ,0103 physical sciences ,vacuum interrupter modules ,Distribution characteristic ,Circuit breaker ,current single-break VCB ,equivalent capacitance model ,business.industry ,General Engineering ,Electrical engineering ,three-dimensional finite-element model ,PSCAD model ,fast multibreak VCB design ,Capacitor ,Equivalent capacitance ,SF(6) circuit breaker ,distribution networks ,lcsh:TA1-2040 ,Vacuum circuit breakers ,lcsh:Engineering (General). Civil engineering (General) ,business ,Software ,Voltage - Abstract
Vacuum circuit breaker (VCB) has a longer life and shorter opening time than SF(6) circuit breaker, but current single-break VCB cannot be applied in high-voltage power system directly. Here, a fast 363 kV multi-break VCB design is presented and its voltage distribution characteristic and stray capacitors are analysed. A three-dimensional finite-element model of modularised hexa-break VCB composed of 12 vacuum interrupter modules installed on three series connected platforms is developed to calculate the voltage distribution and distributed capacitances. The result shows that the voltage distribution is uneven, and the first break shares the 67.974% of the whole applied voltage. On account of distributed capacitances parameters, an equivalent capacitance model with PSCAD is built to discuss the voltage distribution characteristic at different grading capacitance values, and the optimal grading capacitance value is determined to 10 nF.
- Published
- 2019
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