摘要
微电网通常采用储能系统来平抑负载变化引起的直流母线功率波动。文章采用锂电池和超级电容器的混合储能系统(Li-SC HESS)来同时满足因负载变化引起的功率与能量两方面的需求。研究了混合储能系统模型结构,提出了相应的HESS功率协调分配的PCH强跟踪控制方法。结合Simscape在Simulink中建立光储微电网混合储能系统仿真模型,与微电网常规的双闭环线性控制策略进行对比研究。仿真试验结果表明,提出的HESS控制策略可有效减少锂电池充放电次数,平滑其充放电过程,延长使用寿命,进而改善混合储能系统的性能。
The micro-grid usually uses energy storage system to stabilize the power fluctuations of DC bus caused by load changes. This paper uses a lithium battery and super-capacitor hybrid energy storage system（Li-SC HESS） to meet a demand of both the aspects of power and energy due to load changes. This paper researches on the model structure of hybrid energy storage system,and presents a PCH strong tracking control method for power coordinated allocation. Then it combines simscape to simulink, establishes an energy storage system model for photovoltaic micro-grid, and makes a comparative research with the conventional double-loop linear control. The simulation and experimental results show that, the proposed HESS control strategy can effectively reduce lithium battery＇s charging/discharging times, and smooth its charging/discharging process, with prolonging its service life, thereby improving the performance of HESS.
出处
《可再生能源》
CAS
北大核心
2016年第10期1473-1480,共8页
Renewable Energy Resources
基金
国家自然科学基金项目(51247004)
