摘要
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。
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.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第4期158-164,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(50977067)
关键词
分布式电源
电能质量
串联补偿器
电压暂降
Distributed generation
power quality
series compensator
voltage sag
