CAJ | 학술논문

提出了一种基于暂态量的同塔双回线路故障选相方案。该方案利用小波变换工具提取各相故障电流分量的暂态能量，以暂态能量构成选相判据。根据同塔单、双回线故障选相等价原则进行故障相初步判别，在此基础上根据暂态能量大小进行同名相选线，进一步精确识别故障相，从而形成一套完整的基于双回线单端暂态量的故障选相方案。通过PSCAD/EMTDC软件对不同故障类型、故障位置、故障时刻以及不同过渡电阻情况的仿真，验证了该选相方法的可行性。
제출료일충기우잠태량적동탑쌍회선로고장선상방안。해방안이용소파변환공구제취각상고장전류분량적잠태능량，이잠태능량구성선상판거。근거동탑단、쌍회선고장선상등개원칙진행고장상초보판별，재차기출상근거잠태능량대소진행동명상선선，진일보정학식별고장상，종이형성일투완정적기우쌍회선단단잠태량적고장선상방안。통과PSCAD/EMTDC연건대불동고장류형、고장위치、고장시각이급불동과도전조정황적방진，험증료해선상방법적가행성。
This paper proposes a novel approach of transient-based faulty phase selection for double circuit lines on the same tower. This phase-selection algorithm uses the wavelet transform to extract the transient energy of current faulty component in each phase and takes the transient energy as phase selection criterion. First, according to the fault equivalence principle of the single line and double circuit lines on the same tower, this approach identifies the fault phase preliminarily. Then the transient energy magnitudes are compared to select the same-name-phase fault lines and further identify the fault phase precisely. At last, this paper presents a complete faulty phase selection based on the single terminal quantities of double circuit lines. The effectiveness of the approach has been verified by simulating different fault types, fault location, fault time and different transition resistance with PSCAD/EMTDC.