电网技术2016，Vol.40Issue(3)：904-909,6.DOI:10.13335/j.1000-3673.pst.2016.03.035
考虑不平衡电网电压的虚拟同步发电机平衡电流控制方法
Balanced Current Control of Virtual Synchronous Generator Considering Unbalanced Grid Voltage
摘要
Abstract
Virtual Synchronous Generator (VSG) can make distributed generation friendly connect to power grid.However,when three-phase grid voltage becomes unbalanced,traditional VSG control will lead to unbalanced three-phase current.To solve this problem,a VSG balanced current control method is proposed.VSG problem caused by unbalanced grid voltage and its distinction from traditional inverter control are demonstrated.Then,a current reference calculation method is designed based on VSG features in d-q coordinate system to suppress negative-sequence current under different types of unbalanced voltage.Calculation logic of the method is simple,and can realize self-adaptive control under different conditions.Simulation and experiment results verify validity and effectiveness of the proposed method.关键词
虚拟同步发电机/并网控制/不平衡电压/负序电流抑制Key words
virtual synchronous generator/grid-connection control/unbalanced voltage/negative-sequence current suppression分类
信息技术与安全科学引用本文复制引用
陈天一,陈来军,汪雨辰,郑天文,梅生伟..考虑不平衡电网电压的虚拟同步发电机平衡电流控制方法[J].电网技术,2016,40(3):904-909,6.基金项目
国家自然科学基金创新研究群体项目(51321005).Foundation for Innovative Research Groups of the National Natural Science Foundation of China (51321005).本文得到了“新疆电网“友好型”大规模风光互补发电并网的有功调控关键技术开发与应用项目(201491112) （51321005）
清华大学自主科研计划资助项目(20151080416)”的资助,谨此致谢！ （20151080416）
