CAJ | 학술논문

在分析直流滤波器的结构及测点配置、直流滤波器保护系统的配置策略和保护功能的配置策略的基础上,对目前特高压工程中直流滤波器保护存在的关键问题进行研究并提出建议和优化方案.对于直流滤波器高低侧电流 CT 暂态特性不一致导致保护误动的问题,建议采用新的直流滤波器差动保护判据,并在高低压侧采用光 CT测量装置.针对模拟量故障导致三取二逻辑出口策略可靠性降低的问题,提出了一种新的三取二逻辑出口策略.利用RTDS对高压电容器C1内部接地故障进行了仿真分析,给出了一种新的保护功能判据和定值建议.通过对以上关键问题的研究,为后续高压直流工程中的直流滤波器保护的设计提供有益的参考.
재분석직류려파기적결구급측점배치、직류려파기보호계통적배치책략화보호공능적배치책략적기출상,대목전특고압공정중직류려파기보호존재적관건문제진행연구병제출건의화우화방안.대우직류려파기고저측전류 CT 잠태특성불일치도치보호오동적문제,건의채용신적직류려파기차동보호판거,병재고저압측채용광 CT측량장치.침대모의량고장도치삼취이라집출구책략가고성강저적문제,제출료일충신적삼취이라집출구책략.이용RTDS대고압전용기C1내부접지고장진행료방진분석,급출료일충신적보호공능판거화정치건의.통과대이상관건문제적연구,위후속고압직류공정중적직류려파기보호적설계제공유익적삼고.
Based on the analysis of the structure of DC filters, measuring point arrangement, protection system of DC filters and protection configuration strategy of protection function, the key problems in current DC filter protection of UHVDC are studied, and the corresponding suggestion and optimization scheme are given. For the protection misoperation caused by the inconsistent transient characteristics of DC filters high side and low side CT current, using the new DC filter differential protection criterion and installing optical CT measuring device in the high side and low side are suggested. Aiming at the low reliability of "selecting 2 from 3" logic export strategy caused by analog fault, a new "selecting 2 from 3" logic export strategy is proposed. The high voltage capacitor C1 internal grounding fault is simulated and analyzed by using RTDS, and a new protection function criterion and setting value suggestions are given. Study on these key problems provides a useful reference for the design of DC filter protection in the subsequent HVDC project.