直接式AC-AC型智能软开关拓扑与控制  

Topology and Control of Direct AC-AC Type Soft Open Point

作　　者：蔡国伟[1] 张瀚文 刘闯[1] 朱炳达 王艺博 郭东波 李根[2] 葛维春 CAI Guowei;ZHANG Hanwen;LIU Chuang;ZHU Bingda;WANG Yibo;GUO Dongbo;LI Gen;GE Weichun(Northeast Electric Power University,Jilin 132012,Jilin Province,China;Cardiff University,Cardiff CF243AA,UK;State Grid Liaoning Electric Power Supply Company,Shenyang 110300,Liaoning Province,China)

机构地区：[1]东北电力大学,吉林省吉林市132012 [2]卡迪夫大学,英国卡迪夫CF243AA [3]国网辽宁省电力有限公司,辽宁省沈阳市110300

出　　处：《中国电机工程学报》2020年第7期2091-2101,共11页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51877035)。

摘　　要：为实现配电网的柔性互联,提出一种基于多绕组变压器的直接式AC-AC型智能软开关(direct AC-AC soft open point,AC-SOP)拓扑结构,可在四象限内独立控制输出电压的幅值及相位,且无直流环节,拓扑灵活性较高。建立AC-SOP互联馈线环网的数学模型,并结合所提出的AC-SOP的等效占空比算法,给出AC-SOP在潮流控制模式和恢复供电模式下的闭环解耦控制策略。最后,通过仿真验证所提AC-SOP在控制互联馈线环网潮流和恢复供电方面的有效性;通过搭建单相1kW子模块,验证了所提拓扑结构可实现电压幅值与相位的独立控制。In order to achieve the flexible interconnection of distribution networks,a direct AC-AC soft open point(AC-SOP)based multi-winding transformer was proposed in this paper.AC-SOP is able to control the amplitude and phase angle of output voltage in four quadrants independently.Thanks to AC-SOP does not deploy DC-Link,the flexibility of the configuration is enhanced.The AC-SOP topology and working principle were described.The mathematical model of AC-SOP interconnected feeder loop was established.The closed-loop decoupling AC-SOP control strategies for power flow control mode and the power restoration mode were presented with the help of a kind of an equivalent duty cycle algorithm method.Finally,the function of power flow control under normal condition and power restoration under fault condition were verified by the simulation test.By the 1 kW submodule experiment test,the effectiveness of the proposed AC-SOP topology which can independently control the amplitude and phase angle of output voltage was verified.

关 键 词：配电网 柔性互联 智能软开关 拓扑结构 直接式AC/AC变换器 

分 类 号：TM642[电气工程—电力系统及自动化]