光伏微电网孤岛运行模式下冲击负荷跟踪补偿控制  

Tracking and compensating control of impulse load for PV microgrid in the islanding operation mode

作　　者：杨晓梅 刘欢[2] 闻枫[3] 赵国 鄢盛驰[2] 蒋勇亮 YANG Xiao-mei;LIU Huan;WEN Feng;ZHAO Guo;YAN Shen-chi;JIANG Yong-liang(State Grid Jiangsu Electric Power Co.Ltd.,Nanjing 210024,China;China Electric Power Research Institute,Nanjing 210061,China;School of Electrical Engineering,Southeast University,Nanjing 210096,China;Suzhou Yuan-Hui Electric Co.Ltd.,Suzhou 215000,China)

机构地区：[1]国网江苏省电力公司,江苏南京210024 [2]中国电力科学研究院,江苏南京210061 [3]东南大学电气工程学院,江苏南京210096 [4]苏州源辉电气有限公司,江苏苏州215000

出　　处：《电力科学与技术学报》2019年第4期115-122,共8页Journal of Electric Power Science And Technology

基　　金：国网江苏省电力公司科技项目(EPRINYJSKF(2014)4376)

摘　　要：含光伏发电与混合储能系统的微电网在孤岛运行模式下,由于缺少大电网的保护,当微电网系统内存在冲击性负荷时,系统的电压和频率会出现较大波动,从而影响系统的稳定运行。针对这种问题,利用超级电容功率密度高的特点对系统内冲击性负荷的有功和无功电流进行跟踪补偿。另外,该文提出算法简单、工程实施容易的模型电流预测控制方法,用于控制超级电容逆变器。通过仿真结果可以看出,与单独采用储能系统进行V/f控制相比,对冲击性负荷进行跟踪补偿后的系统电压和频率都能稳定在一定的范围内,提升了系统运行的稳定性。与传统的PI控制方法相比,模型电流预测控制方法改善了逆变器输出电流存在谐波的问题。A microgrid including photovoltaic generation and hybrid energy storage system is disconnected to the transmission grid when it operates in an islanding operation mode. Therefore, an impulse load in the microgrid system will cause the fluctuations in system’s voltage and frequency due to the lack of the protection from large power grids, which will affect the stable operation of the system. Under this background, the active and reactive currents of the impulse load in the system are tracked and compensated by the supercapacitor with high power density. In addition, a model current predictive control method with simple control algorithm and easy-engineering implementation are proposed in this paper to control supercapacitor super-capacitor inverters.A simulation is included to verify the effectiveness of control.It is shown that,using the energy storage system alone,the system voltage and frequency after tracking and compensation for the impulse load can be stabilized within a certain range.Compared with a V/f control,the system stability is well improved.Furthermore,the harmonics of inverter output current are effectively improved by the model current predictive control in comparison with the traditional PI control method.

关 键 词：光伏微电网 超级电容 混合储能 孤岛运行 冲击负荷 模型电流预测控制 

分 类 号：TM712[电气工程—电力系统及自动化]