135 / 2024-09-11 11:48:49

A Preliminary Look at The Unity of Frequency Support for Grid-Following and Grid-Forming Wind Turbines

Grid-following,grid-forming,frequency support,unity,wind turbine,virtual synchronous generator

2.Power Electronics Technology and Application > 3.Control, modeling and transient stability analysis of grid-connected converter

Grid-connected wind turbines for frequency sup-port of the grid is conducive to improving the grid frequency security level. Grid-following (GFL) converters and grid-forming (GFM) converters are two important types of equipment to support renewable energy integration into the grid. Both GFM and GFL have a variety of different control strategies when performing frequency support. Clarifying the relationship be-tween different strategies of GFM and GFL when performing frequency support will provide guidance for renewable energy frequency support. In this paper, four levels of frequency support uniformity are first established at the generation unit level. (1) The governor and damping branch of the virtual synchronous generator (VSG) control based GFM converter are unified. (2) The VSG based GFM and the droop based GFM are unified. (3) Integrated inertial control based GFL and droop based GFL are unified. Finally, the theoretical analysis is synthetically verified by MATLAB/Simulink simulation platform.