CAJ | 학술논문

讨论了电阻型直流偏磁抑制装置接入对线路距离保护的影响，针对由抑制装置引发的保护拒动或误动问题，提出一种将零序电抗继电器与相间阻抗继电器相结合的保护方案，相间故障采用相间阻抗继电器，接地故障采用零序电抗继电器，并给出了相应判据的整定计算方法。PSCAD仿真结果表明，此方案能够在一定程度上对直流偏磁抑制装置接入后的线路不对称故障进行有效保护。
토론료전조형직류편자억제장치접입대선로거리보호적영향，침대유억제장치인발적보호거동혹오동문제，제출일충장령서전항계전기여상간조항계전기상결합적보호방안，상간고장채용상간조항계전기，접지고장채용령서전항계전기，병급출료상응판거적정정계산방법。PSCAD방진결과표명，차방안능구재일정정도상대직류편자억제장치접입후적선로불대칭고장진행유효보호。
The impacts of grid-connected resistance-type of DC bias suppression devices on distance relay of transmission line is analyzed in this paper. Based on the analysis of mal-operation of distance relay caused by the insertion of DC bias suppression devices, a protective scheme which combines zero sequence reactance relay with phase-to-phase impedance relay has been put forward. phase-to-phase impedance relay is used to protect phase-to-phase fault and zero sequence reactance relay is applied for protecting the ground fault. Corresponding setting criteria are also given in this paper. Finally, PSCAD simulation results show that the proposed scheme can provide effective protection for the asymmetrical fault of transmission line with the insertion of resistance-type of DC bias suppression device.