CAJ | 학술논문

晶闸管控制的移相器（Thyristor Controlled Phase Shifter，TCPS）通过调整移相角实现电网潮流分布的控制，可有效改善电网潮流分布，提高电网运行经济性。但移相器的应用改变了电网结构和相间耦合关系，当常规纵联保护直接应用于含有移相器的线路时，需考虑移相因素对差动电流的影响以及采用合适的差动电流计算方法，同时需考虑互感器的安装位置的选取，而纵联方向保护方向元件是否受影响也需要做进一步的分析。针对安装了 TCPS的输电线路纵联保护进行了分析和仿真研究，建立了相应的电磁仿真模型，在此基础上分析了互感器安装于不同位置时，常规方向元件、差动元件的动作特性，并提出了几种可能的差动电流计算方法，仿真分析了纵联保护在含移相器线路的适应性。研究表明，移相器的接入对于纵联方向保护的方向元件没有影响，但对常规电流差动保护影响较大，纵联保护应用中宜使用线路侧互感器实现。
정갑관공제적이상기（Thyristor Controlled Phase Shifter，TCPS）통과조정이상각실현전망조류분포적공제，가유효개선전망조류분포，제고전망운행경제성。단이상기적응용개변료전망결구화상간우합관계，당상규종련보호직접응용우함유이상기적선로시，수고필이상인소대차동전류적영향이급채용합괄적차동전류계산방법，동시수고필호감기적안장위치적선취，이종련방향보호방향원건시부수영향야수요주진일보적분석。침대안장료 TCPS적수전선로종련보호진행료분석화방진연구，건립료상응적전자방진모형，재차기출상분석료호감기안장우불동위치시，상규방향원건、차동원건적동작특성，병제출료궤충가능적차동전류계산방법，방진분석료종련보호재함이상기선로적괄응성。연구표명，이상기적접입대우종련방향보호적방향원건몰유영향，단대상규전류차동보호영향교대，종련보호응용중의사용선로측호감기실현。
Thyristor Controlled Phase Shifter (TCPS) can control the power flow distribution by adjusting phase-shifting angle, and enhance the economy of power grid. But the application of TCPS changes the structure of power grid and the coupling relationship between phases. In this case, some key issues have to be considered while using pilot protection on transmission lines with TCPS, which include the installation of current transformer, the effects of phase shift angle on differential current calculation and the characteristics of traditional direction component. This paper introduces the principle of TCPS and builds a simulation model in PSCAD, and analyzes characteristics of the directional component and differential component considering the transmission lines with TCPS. The simulation results show that the directional pilot protection can be applied in transmission lines with TCPS, but for the current differential protection, it is best to use current transformers installed at the line side.