基于超级电容器控制策略的含风电微电网电压波动的抑制

摘要

在分析含风电及储能的微电网电压-功率特性基础上，提出一种基于超级电容器控制策略的电压波动抑制方法，可对风电功率的随机波动进行快速补偿，保证风电与超级电容器储能共同向外输出的功率稳定，实现系统母线电压的稳定控制。对该方法进行了PSCAD仿真，仿真结果表明：风速变化时，该方法可有效抑制风电功率变化引起的电压波动；大型阻感性负载投入、外部故障时，该方法亦能减小电压波动和电压恢复时间，从而验证了所提方法的有效性与可行性。%Based-on-the-analysis-of-voltage-power-characteristics-of-micro-grid-with-wind-power-and-energy-storage,-an-approach-to-suppress-voltage-fluctuation-based-on-the-super-capacitor-control-strategy-is-proposed.-It-can-quickly-compensate-for-random-fluctuations-of-wind-power,-ensuring-the-common-power-of-wind-power-and-super-capacitor-transmitted-to-the-outside-steady,-thereby-achieving-the-system-bus-voltage-stability-control.-The-PSCAD-based-simulation-of-the-proposed-method-is-performed,-and-simulation-results-show-that-when-wind-speed-changes,-it-can-effectively-suppress-the-voltage-fluctuation-caused-by-changes-in-wind-power;-when-large-resistive-inductive-loads-are-input-or-the-external-fault-happens,-it-can-also-reduce-the-voltage-fluctuation-and-voltage-recovery-time,-which-proves-the-proposed-method-is-effective-and-feasible.