基于PR控制三相光伏并网的混合储能控制研究  

Hybrid Energy Storage Control Strategy for Grid-connected Three-phase Photovoltaic Power System Based on PR Controller

作　　者：周子恒[1] 崔景顺[2] 

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]国网四川省电力公司遂宁供电公司,四川遂宁629001

出　　处：《电气开关》2015年第6期46-50,共5页Electric Switchgear

摘　　要：并网时PR控制较PI控制有更好的稳定性能,但利用该策略进行三相光伏并网控制时,光照条件和负载改变带来的并网点有功波动问题仍然存在。使用了一种同时利用蓄电池和超级电容的储能系统进行并网点功率平抑的控制方法。本方法在直流母线上分别为蓄电池和超级电容并联两个DC-DC变换电路。由蓄电池对极短时间内发生的大功率波动进行平抑,对稍长时间内发生的小功率波动进行削峰填谷;超级电容则用来维持直流母线电压的稳定。通过Matlab/Simulink仿真,证明了以上蓄电池-超级电容混合储能系统对PR控制三相光伏并网进行并网点有功功率平抑的可行性。PR controllers have better stability performance than PI controllers when dealing with photovohaic power grid - connected system. However, when light condition and load are in variations, the problem of active power fluctuation at the point where photovohaic power plants are connected to the grid still exists. To solve it, a control strategy to balance the power using battery and super capacitor is introduced in this paper. Two DC -DC converters are paralleled with the DC bus for a battery and a super capacitor. The battery is used for the balance of large power variations in short periods as well as the peak load shifting for smaller power variations during longer periods. The super capacitor is then used to keep the stability of voltage for the DC bus. By simulation using Matlab/Simulink ,the validity of the hybrid energy stor- age control strategy to balance active power for three-phase photovohaie power grid-connected system with PR controller is verified.

关 键 词：比例谐振控制 光伏发电 蓄电池 超级电容 功率平抑 

分 类 号：TM912[电气工程—电力电子与电力传动]