引入负荷电压和电流前馈的V/f控制方法

V/f Control Strategy Introducing the Feed Forward of Voltage and Current

为了稳定离网模式下微网的频率和电压,以含有多种分布式发电的微网系统为研究对象,提出一种基于蓄电池的孤立微网的频率电压控制策略。针对传统的V/f控制策略没有考虑负荷结构变化的问题,蓄电池的控制基于V/f控制的思想,增加负荷电流和电压的前馈,计及系统负荷结构和参数的双重变化。根据该控制方法建立详细的蓄电池的充放电控制系统,并与传统的V/f控制策略进行比较。同时,将该控制方法应用于包含有多种分布式发电的微网系统,对孤岛模式下不同系统状态进行仿真和分析。仿真结果表明,引入负荷电压电流前馈的V/f控制方法是有效的和实用的,该控制方法能快速调节离网模式下微网的频率和电压。

To stabilize the voltage and frequency of the microgrid operated in islanded mode, a control strategy of voltage and frequency based on battery is proposed which sets as a research object an islanded microgrid containing kinds of distributed generator s（DG）. In order to shoot the problem of traditional control of V / f that load structural changes is not taken into account, the control of battery introduces the voltage and current feed forward based on traditional V / f control strategy.According to this control method, the detailed charging / discharging system of battery is established and compared with traditional control scheme. At the same time, the proposed method is applied to an islanded microgrid and various states are simulated of searched microgrid. Simulation results demonstrate that the control strategy introducing the feedforward of voltage and current is valid and practical and can regulate the voltage and frequency rapidly.