超级电容器储能装置研究

Study on Ultracapacitor Energy Storage

超级电容器可作为配电网电能质量调节装置的储能单元,提供必要的能量缓冲。详细分析了超级电容器储能装置的恒压双向功率流工作原理,建立了相应的系统模型,并根据超级电容器的特点,给出了超级电容器储能装置的设计方法,有效地规避了系统开环传递函数不稳定极点的出现。还采用统一控制器实现了储能、释能工作模态的平滑切换,实验结果证明了该控制策略的有效性和可行性。

Ultracapacitor can be used as energy storage element in power quality adjustment device of distribution network and provides necessary energy buffering. The working principle of constant voltage bi-directional power flow in ultracapacitor energy storage device is analyzed in detail and corresponding system model is established. According to the feature of ultracapacitor the method to design ultracapacitor energy storage device is given in which the occurrence of system＇s nonstationary pole of open-loop transfer function is effectively avoided, and smooth shift between the energy storage modality and energy release modality is realized by unified controller. Testing results show that this control strategy is effective and feasible.