机械网络运动方程与构网型VSG惯量阻尼的比较
Comparison Between the Motion Equation of Mechanical Network and the In-ertia Damping of Grid-forming VSG
陈伊健 1李先允 1张旭1
作者信息
- 1. 南京工程学院 电力工程学院,南京 211167
- 折叠
摘要
随着新能源和电力电子设备的广泛应用,新型电力系统面临着多方面的不稳定性挑战.为了克服这些挑战,采用构网型(grid-forming,GFM)控制技术,可以通过电压支撑和主动惯量调节替代同步机,以确保电力系统的稳定性.但构网型变流器自身的惯量阻尼机理尚不明确,其阻尼系数往往被忽略.该文从机械系统的运动方程出发,首先通过推导质量-弹簧系统的运动方程和构网型虚拟同步机控制方程本质上都是二阶微分方程;然后,通过实验仿真验证了机械网络和电气网络的惯量阻尼机理的一致性;最后,通过Matlab/Simulink仿真在IEEE 39节点系统中验证构网型VSG的阻尼系数在维持稳定同步状态中的关键作用.
Abstract
With the wide application of new energy and power electronic equipment,the new power system is facing many instability challenges.In order to overcome these challenges,the grid-forming(GFM)control technology can be used to replace the synchronous machine through voltage support and active inertia adjustment to ensure the stability of the power system.However,the inertia damping mechanism of the grid-connected converter itself is not clear,and its damping coefficient is often ignored.Starting from the motion equation of mechanical system,this paper first de-duces that the motion equation of mass-spring system and the control equation of networked virtual synchronous ma-chine are essentially second-order differential equations.Then,the consistency of the inertia damping mechanism of the mechanical network and the electrical network is verified by experimental simulation.Finally,the key role of the damping coefficient of the grid-connected VSG in maintaining the stable synchronization state is verified by Matlab/Simulink simulation in the IEEE 39-bus system.
关键词
构网型变流器/虚拟同步机控制/质量-弹簧系统/惯量阻尼特性Key words
grid-forming converter/virtual synchronous generator control/mass-spring system/inertia damping characteristics引用本文复制引用
基金项目
江苏电科院科技项目(SGTYHT/21-JS-223)
国家电网江苏省电力公司科技项目(SGJSZJ00BGWT2311202)
出版年
2024
NETL
NSTL
万方数据