锁相锁幅控制技术及其在孤立海岛微电网的应用

Amplitude-Phase-Locked-Loop Control Technology and its Application in the Isolated Island Micro Grid

为满足含高比例新能源微电网频率电压快速调节需求,基于对含高比例电力电子装备的新型供电系统频率/电压动态的理解与认识,介绍了一种锁相锁幅结构,并基于此结构提出了适用于储能的频率/电压快速支撑方法,参与孤立微电网频率电压快速调节。在所提出的方法中,锁相锁幅可以提供电网的频率/电压偏差及其微分信号,利用这4个信号设计频率和电压调节方法,避免了传统控制下复杂的微分运算,同时提升系统的动态支撑性能,使储能能够自发的响应系统频率和电压的变化。最后,在RTDS中搭建了微电网模型验证了所提出控制策略的有效性。。

In order to meet the demand for rapid frequency and voltage regulation of micro grid with high proportion of new energy,based on the understanding and recognition of the frequency/voltage dynamics of the new power supply system with high proportion of power electronic equipment,this paper introduces an amplitude-phase-locked-loop structure,and proposes a fast frequency/voltage support method for energy storage based on this structure to participate in the rapid frequency and voltage regulation of isolated micro grid.In the proposed method,the amplitude-phase-locked-loop can provide the frequency/voltage deviation and its differential signal of the power grid.The frequency and voltage regulation method is designed using these four signals to avoid the complex differential operation under the traditional control,while improving the dynamic support performance of the system,so that the energy storage can spontaneously respond to the changes of the system frequency and voltage.Finally,a micro grid model is built in RTDS to verify the effectiveness of the proposed control strategy.