基于二自由度电流调节的分布式发电系统并网控制技术  

Grid-Connected Control for Distributed Generation Based on Two-Degree-of-Freedom Current Regulation

作　　者：顾和荣[1] 赵清林[1] 郭小强[1] 邬伟扬[1] 

机构地区：[1]燕山大学电气工程学院电力电子节能与传动控制河北省重点实验室,秦皇岛066004

出　　处：《电工技术学报》2010年第8期154-160,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点(50837003);国家自然科学基金(50977081);河北省自然科学基金(E2008000801)资助项目

摘　　要：提出基于二自由度非正弦电流调节(TDFNSCR)的分布式发电(DG)并网接口控制方案,和传统DG并网接口控制通常采用的正弦电流调节(SCR)方案不同,该方案在正弦电流调节的同时,进行谐波电流调节以改善电网电能质量。通过对DG并网接口控制的Thevenin-Norton等效电路分析得出两种改善电网电能质量的途径,并在此基础上提出TDFNSCR并网接口控制方案,该方案最大特点是既不需要额外的补偿装置(如有源滤波器),也不需要确定谐波源的位置和谐波电流的检测,仅通过DG并网接口处的本地电压信息和适当控制即可实现并网发电和有源滤波的统一优化控制,此外,该方案具有通用性,不仅适用于单相系统,还适用于三相系统。采用Matlab/Simulink对提出的方案进行仿真研究,仿真结果验证了TDFNSCR的有效性。Two-degree-of-freedom nonsinusoidal current regulation （TDFNSCR） concept is proposed for utility-interface control in distributed generation applications. Unlike the conventional sinusoidal current regulation （SCR） concept, the proposed concept enables both SCR and power quality enhancements in utility. Thevenin-Norton equivalent circuit is provided to clarify how to enhance the power quality, based on which the TDFNSCR solution is proposed. Its unique feature is to achieve the combination control of active filters and power generation without additional compensating devices or any harmonic current sensor, without positioning the harmonic sources as well. Besides, it can be applied both single-phase systems and three-phase systems. The proposed concept is verified by the exhaustive simulations with Matlab/Simulink. The results confirm the concept.

关 键 词：分布式发电 二自由度控制 非正弦电流调节 并网接口控制 

分 类 号：TN72[电子电信—电路与系统]