一种配电网多线路混合式统一潮流控制器

为适应配电网多线路的潮流调节需求，进一步提高潮流调控能力和响应速度，文中提出一种新型配电网多线路混合式统一潮流控制器(multi-line hybrid unified power flow controller for distribution network,D-MHUPFC)。D-MHUPFC由Sen变压器、统一潮流控制器(unified power flow controller,UPFC)和混合式有载分接开关组成，能够快速调节配电网多线路潮流。相较于传统调节方式，D-MHUPFC具有结构紧凑、响应快速、经济性好和可靠性高等优点。文中结合ZIP负荷模型，推导计及D-MHUPFC的多线路潮流方程，优化其协同控制策略，并搭建10kV配电网仿真平台验证其可行性。结果显示，D-MHUPFC及其控制策略能在0.15s内快速调节多线路潮流，转移过载功率，提高断面输电极限。D-MHUPFC能够解耦控制有功功率和无功功率，补偿误差小于1%，具有和UPFC相当的潮流调节能力。

A multi-line hybrid unified power flow controller for distribution network

In order to meet the power flow regulation requirements of distribution network and improve the power flow regulation ability as well as response speed,a novel multi-line hybrid unified power flow controller for distribution network (D-MHUPFC) is proposed. Based on Sen transformer,unified power flow controller (UPFC),and hybrid on-load tap changer,D-MHUPFC can quickly adjust the multi-line power flow of distribution network. Compared with the traditional regulation mode,D-MHUPFC has the advantages of compact structure,fast response,good economy,and high reliability. Then,the multi-line power flow equation considering D-MHUPFC is derived with the ZIP load model,and its cooperative control strategy is optimized. Finally,the effectiveness of proposed D-MHUPFC is proved by a 10 kV distribution network simulation platform. The results show that D-MHUPFC and its control strategy can quickly adjust the multi-line power flow within 0.15 s,and transfer the overload power as well as improve the section transmission limit. Moreover,D-MHUPFC can realize decoupling control,and the compensation errors are less than 1%. It is verified that D-MHUPFC has the same power flow regulation ability as UPFC.