无储能风电微网系统的下垂控制策略  

Droop Control Strategy of Wind Power Microgrid System without Energy Storage Device

作　　者：芦思晨 潘再平[1] Lu Sichen;Pan Zaiping(College of Electrical Engineering Zhejiang University Hangzhou 310027 China)

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《电工技术学报》2016年第18期169-175,共7页Transactions of China Electrotechnical Society

基　　金：国家高技术研究发展计划(863计划)资助项目(2011AA050204)

摘　　要：包含分布式风力发电系统的微网孤岛运行时,常采用下垂控制策略。由于风能的随机性,微网中风力发电单元发电功率与下垂控制输出功率不等,需要利用储能装置来均衡功率,维持直流电压恒定。对此,提出了一种改进下垂控制策略。通过检测直流电压,动态平移下垂特性曲线,改变下垂控制平衡工作点,调节下垂控制输出功率,以促进功率均衡,减小直流侧储能装置容量。仿真及实验结果验证了改进下垂控制策略的有效性。Droop control is used when microgrid including distributed wind power generationsystem operates in island mode. Duo to the intermittency of wind energy, output power of the inverterwith droop control in microgrid is not equal to the generation power. So energy storage devices such asthe battery are needed to balance the power and keep the DC bus voltage constant. An improved droopcontrol strategy is proposed to reduce the capacity of the energy storage device. A series of steps arecarried out to adjust the output power and match the generation power, including the measurement ofDC bus voltage, translation of the droop control characteristic curve and change of droop controloperating point. Simulation and experimental results demonstrate the effectiveness of the improveddroop control strategy.

关 键 词：分布式风力发电 下垂控制 储能装置 微网 

分 类 号：TM46[电气工程—电器]