DQ-reference-frame based impedance and power control design of islanded parallel voltage source converters for integration of distributed energy resources

作     者：Ramezani, Malek Li, Shuhui Sun, Yang 

作者机构：Univ Alabama Dept Elect & Comp Engn Tuscaloosa AL 35487 USA 

出 版 物：《ELECTRIC POWER SYSTEMS RESEARCH》 (电力系统研究)

年 卷 期：2019年第168卷第Mar.期

页      面：67-80页

核心收录：

学科分类：0808[工学-电气工程] 080802[工学-电力系统及其自动化] 08[工学] 

基　　金：U.S. National Science Foundation Directorate For Engineering Div Of Industrial Innovation & Partnersh Funding Source: National Science Foundation 

主　　题：Synchronous reference frame Distributed energy resources Voltage source converter 

摘      要：This paper investigates dq-reference-frame (dq-RF) self and cross-coupling output impedances of the islanded voltage source converter (VSC), by considering the controller impacts. The dq-RF impedances for the closed-loop system are designed to exhibit the desired resistive, inductive, or capacitive characteristics, and are employed in the power control of VSC. The effects of these impedances and connecting lines impedances on the power control of islanded parallel connected VSCs, for different impedance characteristics, are also studied. It is shown in this paper that the unbalanced impedance significantly affects the performance and power control of these parallel converters. Besides, virtual impedance based active and reactive power control of the parallel converters in the dq-RF, for resistive, inductive, and capacitive cases, are designed and implemented. The numerical and experimental results verify the analysis presented in this paper about the dq-output impedance and the virtual impedance based power sharing control.