单级型三相储能变流器基本控制策略分析

An Analysis of the Basic Control Strategy for the Single-stage Three-phase Energy Storage Converter

储能变流器是微电网、不间断电源(UPS)等设备中储能控制的关键设备。针对储能变流器的不同控制目标,控制策略可分为高级控制策略和基本控制策略。高级控制策略实现具体应用领域的控制目标,基本控制策略是高级控制策略设计的基础,根据高级控制策略形成的指令,实现基本环路的控制功能。将基本控制策略划分为定直流电压、定直流电流、定交流电流、定交流电压四种控制模式,通过在同步旋转坐标系下建立的变流器数学模型,运用典型I型系统和II型系统PI调节器经典设计方法,对每一种控制器进行设计,得到设计参数并进行仿真。结果表明,提出的基本控制器设计思路和方法可用于指导变流器控制器设计。

Energy storage converter is a key device for energy storage control in the micro-grid and uninterruptible power supply （ UPS }. According to different control objectives of the energy storage converter, the control strategy can be divided into advanced control strategy and basic control strategy. Advanced control strategy is to achieve the control objectives of specific application areas while the basic control strategy, as the base of design of advanced control strategy, is to achieve the control of fundamental loops according to the instructions from advanced control strategy. The basic control strategy is divided into four control modes： constant DC voltage, constant DC current, constant AC current and constant AC voltage. Under the circumstance of the converter mathematical model set up in the synchronous rotating coordinate system ~ we use the classic methods of PI regulator in typical type I and II systems to design each controller and use parameters to verify them by simulation. The result shows that the basic control design thoughts and methods presented in the paper can be used as a guide for the design of converter controllers.