基于下垂系数步长自适应的下垂控制策略  

A Droop Control Strategy Based on Drooping Coefficient with Adaptively Changing Steps

作　　者：张东[1] 卓放[1] 师洪涛[1] 耿志清[1] 翟灏[1] 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049

出　　处：《电力系统自动化》2014年第24期20-25,47,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51177130);台达电力电子科教发展计划重点资助项目(DREK2011002)~~

摘　　要：分布式发电系统输出功率有很大的随机性,当接入采用下垂控制的微电网时,会导致孤岛微电网母线电压产生波动,这会对接入微电网中的负载产生不良影响。为了抑制分布式发电系统输出功率波动引起的微电网母线电压波动,提出了一种基于下垂系数步长自适应的下垂控制策略,并进行了仿真和实验验证。实验结果表明,在接入分布式发电系统后,采用基于下垂系数步长自适应的下垂控制策略的微电网能够有效维持自身的稳定。Owing to the randomness of the output power in a distributed generation system, the voltage of the bus in an islanding microgrid will fluctuate to an extent that will cause detrimental effects on the payloads connected to that microgrid. A droop control strategy based on drooping coefficient with adaptively changing steps is proposed to suppress the voltage fluctuation of the microgrid bus bar induced by output power swings of a distributed generation system. Simulations and experiments are conducted to validate the proposed algorithm. Results show that a microgrid connected to a distributed generation system is able to maintain the stability of its voltage of the bus by adopting the algorithm based on droop coefficient with adaptively changing steps.

关 键 词：微电网(微网) 分布式发电 下垂控制 自适应 孤岛 

分 类 号：TM619[电气工程—电力系统及自动化]