直流微网储能系统的自适应惯量阻尼控制

由于无需考虑无功及相位且对于可再生能源发电并网更加友好,近年来,关于直流微网的研究越来越多。但直流微网中惯性较低,当系统受到外界因素干扰时,直流母线电压鲁棒性较低,严重时甚至影响系统的稳定运行。针对该问题,提出一种用于直流微网储能系统的自适应惯量阻尼控制策略,并充分利用了虚拟参数灵活可调的特点,使储能系统可以向微网提供惯性,并建立了系统的小信号模型,利用Middlebrook判据分析了系统的西信号稳定性。最后,利用simulink仿真对所提控制策略的有效性进行了验证。

A self-adaptive control strategy in DC microgrid

since there is no need to consider reactive power and phase and is more friendly to renewable energy power generation, there are more and more researches on DC microgrids in recent years. But the inertia of DC microgrid is small. When the system is disturbed by external factors, the DC bus voltage is less robust, and it even affects the stable operation of the system. In order to solve this problem, an adaptive inertia damping control strategy for DC microgrid energy storage system is proposed, and the characteristics of flexible and adjustable virtual parameters are fully utilized. The energy storage system can provide inertia to the microgrid, and the small signal model of the system is established, and the stability of the system is analyzed by the Middlebrook criterion. Finally, the effectiveness of the proposed control strategy is verified by Simulink simulation.