中国电机工程学报Issue(3)：346-353,8.DOI:10.13334/j.0258-8013.pcsee.2014.03.004
不平衡电网电压下光伏并网逆变器功率/电流质量协调控制策略
Coordinate Control of Power and Current Quality for Grid-connected PV Inverters Under Unbalanced Grid Voltage
摘要
Abstract
Power oscillation and current quality are the important performance Index for the photovoltaic (PV) grid-connected inverter under unbalanced grid voltage. Firstly, the generation mechanism of the current harmonic and power oscillation of the PV grid-connected inverter is discussed with a quantitative analysis. Secondly, a new stationary frame control strategy is proposed. The current reference is directly generated with the instantaneous power concept, which greatly simplifies the control structure due to no need of the phase-locked loop and voltage/current positive/negative sequence extraction calculation. The coordinate control of power and current quality is achieved with the weighted idea, which enhances the operation performance of the PV grid- connected inverter. Finally, the simulation and experiments are carried out under the unbalanced grid voltage. Results verify the feasibility and effectiveness of the propose method.关键词
不平衡电网电压/光伏并网逆变器/电流质量/功率波动Key words
unbalanced grid voltage/PV grid connected inverter/current quality/power oscillation分类
信息技术与安全科学引用本文复制引用
郭小强,张学,卢志刚,王宝诚,漆汉宏,孙孝峰..不平衡电网电压下光伏并网逆变器功率/电流质量协调控制策略[J].中国电机工程学报,2014,(3):346-353,8.基金项目
国家自然科学基金项目(51307149)；河北省自然科学基金项目(E2012203023)；高等学校博士学科点专项科研基金资助项目(20131333120016,20121333110007)。Project Supported by National Natural Science Foundation of China (51307149) （51307149）
Hebei Province Natural Science Foundation (E2012203023) （E2012203023）
Specialized Research Fund for the Doctoral Program of Higher Education (20131333120016,20121333110007) （20131333120016,20121333110007）
