摘要
为了平抑新能源电源发电中产生的功率波动,文中将磷酸铁锂电池和超级电容组合,通过双向半桥变换器构成复合储能系统。根据储能元件对功率波动的频率需求不同,采用低通滤波确定各储能元件的给定功率,并用双闭环控制结构对双向变换器进行控制,同时考虑到储能元件的荷电状态对系统的影响,优化了储能系统的控制策略。Matlab/Simulink仿真结果表明,在复合储能系统稳定性提高的同时,储能电池的损耗降低,验证了所提出能量分配方案及控制策略的有效性。
A complex storage system is proposed by combining t the lithium iron phosphate batteries and super capacitor by two-way half-bridge converter to stabilize the new energy power generation power fluctuations generated.According to the different demand for energy storage element power fluctuations frequencies,a low-pass filter is used to determine the energy storage element of a given power,and with a double-loop control structure for bidirectional converter control,taking into account the state of charge of the energy storage element of the system impact and optimizing the energy storage system control strategy. Matlab/Simulink simulation shows that the energy storage system improves the stability of the composite and reduces the loss of energy storage battery,verifying the effectiveness of the energy distribution plan and the proposed control strategy.
出处
《电子科技》
2014年第11期146-150,153,共6页
Electronic Science and Technology
基金
北京市属高等学校高层次人才引进与培养计划基金资助项目(CIT&TCD201404003)
关键词
锂电池
超级电容
复合储能系统
低通滤波
功率分配控制
Lithium batteries
super capacitor
complex storage systems
low-pass filter
power distribution control
