基于虚拟同步机的主动配电网电压控制  

Voltage Control of Active Distribution Network Based on Virtual Synchronous Generator

作　　者：廖碧莲[1] 林浩博 LIAO Bilian;LIN Haobo(College of Electrical Engineering,Guangxi University,Guangxi Nanning 530004,China)

机构地区：[1]广西大学电气工程学院,广西南宁530004

出　　处：《广西电力》2018年第4期36-40,共5页Guangxi Electric Power

基　　金：广西自然科学基金(2016GXNSFAA380327)

摘　　要：由于分布式电源自身的间歇性和随机性,以及电力电子设备的低惯性和无阻尼等特点,大规模新分布式电源接入给主动配电网的电压稳定控制和电能质量带来很大的挑战。为此,将虚拟同步机(VSG)技术引入并网逆变器的电流控制环节,使其具有同步发电机的外特性,以改善主动配电网的电压质量。在分析虚拟同步机工作原理的基础上给出了VSG控制策略的实现方法,并在PSCAD软件中搭建了一个含有微电网的IEEE-13节点主动配电网仿真模型,通过与下垂控制作对比,验证了VSG技术在主动配电网电压调节中的有效性。Due to the intermittency and randomness of distributed energy itself and characteristics of low inertia and non-damping of power electronic equipment,the large-scale grid connection of distributed energy brings great challenges to voltage stability control and power quality in active distribution network.Therefore,the virtual synchronous machine(VSG)technology is introduced into the current control loop of grid-connected inverter,which makes grid-connected inverter have external characteristics of synchronous generator,so as to improve voltage quality of active distribution network.The implementation method of VSG control strategy is provided based on the analysis of virtual synchronous machine principle.An IEEE-13 node simulation model of active distribution network which contains micro grid is built in PSCAD software.The effectiveness of VSG technology in voltage regulation of active distribution network is verified by comparing with the droop control.

关 键 词：主动配电网 电压控制 虚拟同步机 光伏发电 

分 类 号：TM714.2[电气工程—电力系统及自动化]