CAJ | 학술논문

采用 P/ Q 控制策略的分布式电源（DG）的故障电流特性与传统发电机不一致，将会导致原有配电网距离保护不能有效满足继电保护的要求。针对该问题，分析了分布式电源接入时配网故障电流与距离保护测量阻抗的相关特性，并结合 P/ Q 控制策略下 DG 的故障电流特性研究了配电网单相接地自适应距离保护整定方法，解决了原有配电网距离保护不能有效动作的问题。通过对单相接地故障进行模拟仿真，证明了该整定方法的有效性，对实际应用具有一定参考价值。
채용 P/ Q 공제책략적분포식전원（DG）적고장전류특성여전통발전궤불일치，장회도치원유배전망거리보호불능유효만족계전보호적요구。침대해문제，분석료분포식전원접입시배망고장전류여거리보호측량조항적상관특성，병결합 P/ Q 공제책략하 DG 적고장전류특성연구료배전망단상접지자괄응거리보호정정방법，해결료원유배전망거리보호불능유효동작적문제。통과대단상접지고장진행모의방진，증명료해정정방법적유효성，대실제응용구유일정삼고개치。
The fault current characteristics of distributed power with P/ Q control strategies are differ-ent from the traditional synchronous generator. It would be resulted in that the distance protection of traditional distribution network could not satisfy the requirements of the DG effectively. This paper an-alyzed the distributing network including DG access correlation characteristics for the fault current be-tween the measured impedance of distance protection. Then,the paper proposed a method of adaptive single-phase grounding distance protection criterion with the fault current characteristics of the DG un-der the P/ Q control strategies. It was a good solution for setting calculation of DG distance protection. Finally,the single-phase grounding fault was simulated using the Pscad 4. 2. The simulation results show the feasibility and validity of the method. It has important practical application value.