CAJ | 학술논문

伴随着高压直流输电工程日益增长，直流断路器作为直流线路中分断装置，也逐步受到了研究人员的关注，其能够促进多端直流及直流电网实现，推动可再生能源尤其是海上风电的开发。首先简要回顾了高压直流断路器研究状况，对现有方案进行了比较分析。随后提出了一种基于晶闸管的混合型无弧高压直流断路器，通过等效数学模型对工作阶段的电气参数和临界时刻进行了计算。最后以舟山5端直流系统电压200 kV为参照，利用PSCAD/EMTDC开展了断路器仿真研究，验证了理论分析的正确性以及所提断路器的可行性，并从技术和经济角度开展了性能分析。
반수착고압직류수전공정일익증장，직류단로기작위직류선로중분단장치，야축보수도료연구인원적관주，기능구촉진다단직류급직류전망실현，추동가재생능원우기시해상풍전적개발。수선간요회고료고압직류단로기연구상황，대현유방안진행료비교분석。수후제출료일충기우정갑관적혼합형무호고압직류단로기，통과등효수학모형대공작계단적전기삼수화림계시각진행료계산。최후이주산5단직류계통전압200 kV위삼조，이용PSCAD/EMTDC개전료단로기방진연구，험증료이론분석적정학성이급소제단로기적가행성，병종기술화경제각도개전료성능분석。
Increasing HVDC transmission project gradually attracts the researcher’s attention to the high voltage DC circuit breaker (DCCB), which is the interrupt equipment in DC line. The DCCB could promote the realization of multi-terminal direct current (MTDC) and DC grid, and advance the development of renewable energy such as offshore wind power. This paper firstly compared the various existing circuit breaker. A thyristor based on hybrid arc-less high voltage DCCB topology was proposed. According to the equivalent mathematical models established in the paper, the critical instants and electrical parameters for different operating stages of the DCCB were derived. Operating performance of the DCCB for Zhou Shan 5 terminals 200 kV DC system was analyzed using PSCAD/EMTDC simulations, which was compared from technology and economic aspects, and the correctness of the theoretical analysis and the feasibility of the circuit breaker were also proved.