微电网系统中多种逆变器的并联组网控制策略  

Control strategies of parallel grouped network in microgrid system with various inverters

作　　者：张明光[1] 张义娜[1] 孙慧丽[2] 郭得政 

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050 [2]河南省濮阳供电公司,河南濮阳457000 [3]新疆神火炭素制品有限公司,新疆乌鲁木齐830000

出　　处：《兰州理工大学学报》2014年第4期86-91,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(71203082)

摘　　要：采用氢燃料蓄电池单体的串并联组成的电池模块作为储能系统中的主要储能装置,多种逆变器连接在同一条公共线上.在微电网处于孤岛运行模式时,考虑到储能单元的逆变器间环流的存在、不同设备控制器的不同工作特性、低通滤波器存在的影响,提出新的下垂控制理论.利用逆变器模拟同步发电机的频率调节特性,保证负荷发生变化时微电网频率的稳定性;利用静止无功补偿器SVC补偿系统无功,以保障系统电压的稳定,进而实现多种逆变器的组网运行.利用PSCAD仿真软件进行仿真,验证对所建立的模型采取的一系列控制策略的有效性和正确性.The battery module composed of series-parallel hydrogen fuel batteries is taken as the main energy storage device in the energy storage system. Various inverters are connected onto a common line. When microgrid operates in islanding mode and taking into account of the influence of existence of circulation among the energy storage inverters, the difference in operation characteristics of the controllers for different devices, and the existence of low-pass filter, a new droop control theory is advanced. The inverter is used to simulate the frequency regulation characteristics of synchronous generator and thus ensure the stability of the micro-grid frequency in spite of load changes. The system reactive power is compensated by using the static reactive compensator SVC, so as to guarantee the system voltage stability. By doing so, the grid-connected operation of various energy storage inverters is realized. By using the simulation software PSCAD, the effectness and crrectness of the serial control strategy used onto the established model are verified.

关 键 词：孤岛运行 下垂控制 频率调节 SVC PSCAD EMTDC 

分 类 号：TM76[电气工程—电力系统及自动化]