电测与仪表2024，Vol.61Issue(5)：190-197,8.DOI:10.19753/j.issn1001-1390.2024.05.026
孤岛微电网电流同步U-I下垂控制方法
Current synchronous U-I droop control strategy for islanded microgrids
摘要
Abstract
The islanded micro-grid system using voltage-current(U-I)droop control operates at power frequency,which avoids the frequency deviation and frequency over-limit caused by traditional droop control,but it causes cir-culation,and inaccuracy power sharing among distributed generations(DGs).Therefore,the current synchronous U-I droop control method is proposed,which consists of current synchronous control and U-I amplitude droop con-trol.The former can restrain the circulation by adjusting the output voltage phase angle to make the output current phase angle of each DGs consistent.The latter regulates the amplitude of the output voltage according to the ampli-tude of the output current so that power sharing of each DGs is distributed according to its capacity.On this basis,the small-signal model of the double-terminal system is established to analyze the influence of control parameters in the current synchronous control loop on the stability of the system,which provides a basis for parameter design.Simulation and experimental results show that,compared with U-I droop control,the proposed method can reduce the system circulation by more than 50％,improve the voltage distortion rate by nearly 10％,and improve the pow-er distribution precision between DGs and the power quality of the system significantly.关键词
电流同步U-I下垂控制/定频控制/孤岛微网/环流抑制/卫星授时Key words
current synchronous U-I droop control/constant-frequency control/islanded microgrids/circulation suppression/satellite timing分类
信息技术与安全科学引用本文复制引用
徐化博,赵艳雷,路茂增,毕永健..孤岛微电网电流同步U-I下垂控制方法[J].电测与仪表,2024,61(5):190-197,8.基金项目
国家重点研发计划项目(2017YFB0902800) （2017YFB0902800）
山东省自然科学基金青年项目(ZR2020QE215) （ZR2020QE215）
