A Novel Oscillation Damping Method of Virtual Synchronous Generator Control Without PLL Using Pole Placement
A Novel Oscillation Damping Method of Virtual Synchronous Generator Control Without PLL Using Pole Placement
复制标题
DOI：
10.23919/ipec.2018.8508003
复制
发表时间：
2018-05
期刊：
影响因子：
--
通讯作者：
Jia Liu;Y. Miura;T. Ise
中科院分区：
文献类型：
--
作者：
Jia Liu;Y. Miura;T. Ise
近年来，为了避免由于逆变器接口的分布式发电机的增加而可能导致的电力系统的惯性减小，已经提出了虚拟同步发电机（VSG）控制，一种提供虚拟惯性的逆变器控制方案。然而，基本VSG控制的谐振模式导致瞬态振荡阻尼。在这项研究中，一个状态空间模型的同步发电机连接到无穷大总线研究这种振荡的机制，并了解以前的VSG控制方法的阻尼效果。基于状态空间模型，提出了一种基于极点配置的VSG减振方法。该方法通过非常简单的状态反馈控制，无需任何频率测量即可提供适当的阻尼，同时保持了VSG的惯性特性。PSCAD/EMTDC仿真结果和微网实验台上的实验结果表明，该方法具有良好的暂态性能，优于以往的VSG控制方法。
Recent years, in order to avoid probable inertia decrease of power system due to increasing inverter-interfaced distributed generators, virtual synchronous generator (VSG) control, an inverter control scheme providing virtual inertia, has been proposed. However, the resonant mode of basic VSG control results in transient oscillation damping. In this study, a state-space model of a synchronous generator connected to infinite bus is established to study the mechanism of this oscillation and to understand the damping effect of previous VSG control methods. Based on the state-space model, a novel oscillation damping method of VSG using pole placement is proposed. With a very simple state feedback control, the proposed method provides proper damping without any frequency measurement whereas keeps the inertial feature of VSG. Simulation results obtained with PSCAD/EMTDC and experimental results obtained in a laboratorial microgrid testbed indicate that the proposed method outperforms previous VSG control methods with excellent transient performance.