摘要
超级电容虽具有充放电速度快、功率密度高等特点,但其充放电系统存在易受变流器固有非线性特性以及充放电电压扰动影响等问题。为了解决此类问题,构建了含双向DC-DC变流器的超级电容充放电系统主电路,通过满足电流连续性以及控制直流母线电压波动在允许范围内等条件,设计了主电路中的续流电感值和稳压电容值;为增强充放电系统的鲁棒性,采用了定电流控制策略,并完成了恒流方式下PI控制器参数整定。仿真结果表明,在充放电电压扰动作用下,超级电容充放电系统能够使电感电流稳定输出,且纹波较小,具有较强的鲁棒性。
Although the supercapacitor has the characteristics of fast charging-discharging speed and high power density,its charging-discharging system is vulnerable to the inherent nonlinear characteristic of converter and the impact of charging-discharging voltage disturbance.The main circuit of the charging-discharging system for supercapacitor is constructed with a bi-directional DC-DC converter,and the inductance and capacitance are designed under the conditions of current continuity and DC-bus voltage fluctuation in the allowed range.In order to enhance the robustness of the charging-discharging system,a control strategy with constant current is adopted and PI controller parameters are adjusted under the constant current mode.Simulation results show that the charging-discharging system for supercapacitor not only achieve the output current stably flowing through with small ripple,but also has strong robustness.
作者
罗华伟
郑云龙
周亮
秦正斌
许珊
徐志强
冷照进
唐欣
LUO Huawei;ZHENG Yunong;ZHOU Liang;QIN Zhengbin;XU Shan;XU Zhiqiang;LENG Zhaojin;TANG Xin(Hunan Economy Institute Electric Power Design Co.,Ltd.,Changsha 410004,China;School of Electrical&Information Engineering,Changsha University of Science&Technology,Changsha 410114,China)
出处
《电力科学与技术学报》
CAS
CSCD
北大核心
2023年第5期262-268,共7页
Journal of Electric Power Science And Technology
基金
国家自然科学基金(51977013)。
关键词
超级电容
充放电控制
主电路
定电流控制策略
supercapacitor
charging-discharging control
main circuit
control strategy with constant current
