CAJ | 학술논문

同杆并架双回线近年来得到了广泛的应用，但其双回线的零序互感对接地距离保护的误差影响给运行整定带来了挑战。文中通过对双回线运行、本线运行邻线检修、本线单侧运行3种工况下接地距离保护测量阻抗及距离保护Ⅰ段动作边界的计算，分析了各工况下距离保护Ⅰ段动作边界的影响因素及误差程度，并根据特高压系统参数在实时数字仿真器(RTDS)中对实际保护装置进行了仿真测试，验证了所述的计算与分析结论，从而为距离保护的定值整定提供了依据，分析表明在双回线互感影响下距离保护Ⅰ段应在传统定值下合理回缩以确保其选择性。
동간병가쌍회선근년래득도료엄범적응용，단기쌍회선적령서호감대접지거리보호적오차영향급운행정정대래료도전。문중통과대쌍회선운행、본선운행린선검수、본선단측운행3충공황하접지거리보호측량조항급거리보호Ⅰ단동작변계적계산，분석료각공황하거리보호Ⅰ단동작변계적영향인소급오차정도，병근거특고압계통삼수재실시수자방진기(RTDS)중대실제보호장치진행료방진측시，험증료소술적계산여분석결론，종이위거리보호적정치정정제공료의거，분석표명재쌍회선호감영향하거리보호Ⅰ단응재전통정치하합리회축이학보기선택성。
Double-circuit transmission lines on the same tower are widely applied recently bringing challenges to operation and value setting due to errors in earth-fault distance protection.Through calculation of measured impedance and trip boundary of zone Ⅰ of earth-fault distance protection in the double-circuit normal operation mode,single line operation mode and single side operation mode,the factors influencing trip boundary of zone Ⅰ of distance protection magnitude of errors are analyzed in different operation modes.Based on actual ultra-high voltage alternating current system parameters,the line protection device is tested with a real-time digital simulator (RTDS) to verify the calculation and analysis above,providing a basis for value setting of distance protection.It is shown by analysis that,influenced by double-circuit mutual inductance,traditional value setting of zone Ⅰ of earth-fault distance protection should be reduced to a rational extent to ensure the selectivity of protection.