中国电机工程学报2013，Vol.33Issue(3)：22-28,前插3,8.
电网电压畸变不平衡情况下三相光伏并网逆变器控制策略
Control Strategies of Three-phase PV Grid-connected Inverter under Distorted and Unbalanced Voltage Conditions
摘要
Abstract
Control strategy under distorted and unbalanced grid voltage conditions is one of the most important issues for grid integration of high penetration photovoltaic (PV) systems. In order to ensure that the PV system outputs the constant active power and the grid current complies with IEEE Std.929-2000, a new control strategy was presented. Firstly, the power flow of PV systems was analyzed. Secondly, the grid current command was derived from the viewpoint of constant active power. The positive and negative sequences estimation of the grid voltage was also provided. Thirdly, the system control model based on passive damping was built, and the system stability was analyzed. Besides that, the system steady-state error control was discussed. Finally, the system performance tests were carried out under the distorted and unbalanced grid voltage conditions. The experimental results verify the effectiveness of the proposed method.关键词
光伏/并网逆变器/电网电压畸变/电网电压不平衡/并网电流控制Key words
photovoltaic/ grid-connected inverter/ grid voltage distortion/ grid voltage unbalance/ grid current control分类
信息技术与安全科学引用本文复制引用
郭小强,邬伟扬,漆汉宏..电网电压畸变不平衡情况下三相光伏并网逆变器控制策略[J].中国电机工程学报,2013,33(3):22-28,前插3,8.基金项目
国家自然科学基金项目(50837003) （50837003）
河北省高等学校科学研究项目(2011249) （2011249）
河北省自然科学基金项目(E2012203023). （E2012203023）
