CAJ | 학술논문

根据换流阀的触发控制及保护原理，结合常规直流、特高压直流输电工程实际，对不同技术路线的换流阀控制系统进行了对比分析。西门子换流阀控制原理时序性强，在导通期不会对保护性触发产生误判断。但是其恢复期保护的控制策略不尽合理，较容易发生误触发故障。ABB 换流阀控制原理简单可靠，但是其在控制脉冲区间内，不能够准确区分电流断续补发触发脉冲和保护性触发，在进行开路试验及小电流情况下，易造成保护性触发误动作。通过分析直流输电工程中阀控系统出现的有关故障，总结出不同技术路线阀控系统的优缺点，并对存在的问题提出相关解决建议。
근거환류벌적촉발공제급보호원리，결합상규직류、특고압직류수전공정실제，대불동기술로선적환류벌공제계통진행료대비분석。서문자환류벌공제원리시서성강，재도통기불회대보호성촉발산생오판단。단시기회복기보호적공제책략불진합리，교용역발생오촉발고장。ABB 환류벌공제원리간단가고，단시기재공제맥충구간내，불능구준학구분전류단속보발촉발맥충화보호성촉발，재진행개로시험급소전류정황하，역조성보호성촉발오동작。통과분석직류수전공정중벌공계통출현적유관고장，총결출불동기술로선벌공계통적우결점，병대존재적문제제출상관해결건의。
According to the theory of converter firing control and protection, this paper analyzes the valve control system’s merits and demerits compared with different techniques based on the actual situation of the HVDC and UHVDC transmissions. Siemens valve control system is sequential. It could verdict the protective pulse accurately during the conducting state, but could not do it because of the unperfect control strategy, during the recovery period. ABB valve control system is simple and reliable. But during the firing pulse appeared, it could not distinguish the firing pulse sent again because of the discontinuous current and the protective pulse accurately, and would make the protective trigger faulty act, in the OLT mode or under the small DC load.