CAJ | 학술논문

特高压输电线路具有显著的分布参数特性,因此线路发生故障时,测量阻抗与故障距离的关系不同于高压、超高压线路故障时的关系,并联电抗器的使用使得情况更加复杂.为了将距离保护应用到特高压线路上,提出了不同的解决方案.通过公式推导、阻抗平面绘图以及支接阻抗特性仿真等方法,对比分析了这些方案的静态特性,结果表明它们能够满足继电保护的静态精度要求.仿真分析验证了结果的正确性.
특고압수전선로구유현저적분포삼수특성,인차선로발생고장시,측량조항여고장거리적관계불동우고압、초고압선로고장시적관계,병련전항기적사용사득정황경가복잡.위료장거리보호응용도특고압선로상,제출료불동적해결방안.통과공식추도、조항평면회도이급지접조항특성방진등방법,대비분석료저사방안적정태특성,결과표명타문능구만족계전보호적정태정도요구.방진분석험증료결과적정학성.
Because of the distinct characteristics of distributed parameters, the relationship between measured impedance and fault distance of ultra high voltage (UHV) transmission lines is much different from that of high voltage (HV) or extra high voltage (EHV) transmission lines. The usage of shunt reactors renders extra complexity. In order to use distance relays on UHV lines, different schemes are proposed. This paper analyzes static characteristics of these schemes by formula derivation, impedance plane diagram and sub-circuit resistance characteristics calculation, which reveals that all proposed schemes satisfy the static performance requirements of relays. Digital simulation validates the correctness of the analysis results.