CAJ | 학술논문

为了扩大分布式电源的应用范围、改善配电网的电能质量,本文提出了一种新颖的串联补偿方案。采用分布式电源和串联补偿器共享直流母线的结构,使电力电子装置可以灵活地控制配电网中的潮流分配。在配电网上游电源发生电压暂降时,串联补偿器可以同时从分布式电源和上游电源获得有功功率支持,有效地稳定负荷母线电压,提高负荷对电压暂降的耐受能力。通过相量分析及理论推导,得到了电压暂降幅值、相角跳变和串联补偿器容量之间的解析关系。仿真结果验证了该串联补偿方式的有效性。
위료확대분포식전원적응용범위、개선배전망적전능질량,본문제출료일충신영적천련보상방안。채용분포식전원화천련보상기공향직류모선적결구,사전력전자장치가이령활지공제배전망중적조류분배。재배전망상유전원발생전압잠강시,천련보상기가이동시종분포식전원화상유전원획득유공공솔지지,유효지은정부하모선전압,제고부하대전압잠강적내수능력。통과상량분석급이론추도,득도료전압잠강폭치、상각도변화천련보상기용량지간적해석관계。방진결과험증료해천련보상방식적유효성。
In order to extend the applications of distributed generation （DG） and improve the power quality in the distribution network, a novel series compensation scheme is proposed in this paper. In this scheme, a DG and a series compensator （SC） share a same DC bus. The power electronic devices would regulate the power flow in the distribution network flexibly. When the upstream source undergoes a voltage sag, the SC can obtain the active power support from the upstream source and the DG simultaneously. This scheme could maintain the load voltage to the desirable level and improve the load ride-through capability effectively. Through the phasor diagram and theoretical derivations, this paper provides a general relationship between the voltage sag magnitude, voltage phase angle jump and the SC rating. Simulation results show the efficacy of the proposed scheme.