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ORIGINAL RESEARCH article

Front. Smart Grids
Sec. Smart Grid Control
Volume 3 - 2024 | doi: 10.3389/frsgr.2024.1476695
This article is part of the Research Topic Advances in Dynamics and Control of Smart Grids View all articles

Study on Improved Control Strategy of Virtual Synchronous Generator

Provisionally accepted
Ji Li Ji Li 1*Fan Yang Fan Yang 2Huanmin Wang Huanmin Wang 1Bingqing Chu Bingqing Chu 1
  • 1 Shangluo University, Shangluo, China
  • 2 Shanghai Sunshine Power Supply Co. Ltd, Shanghai, China

The final, formatted version of the article will be published soon.

    Virtual Synchronous Generator (VSG) control technology for photovoltaic, energy storage, wind power, and other new energy to provide flexibility in the grid interface characteristics, is conducive to improving the stability of the power system and has been widely considered by many scholars. In this work, an improved VSG control method is proposed to realize the complete decoupling of the frequency response time constant and inertia of the active power control loop and to reduce the complexity of VSG system parameter design. To avoid the frequent action of the VSG system caused by small-scale frequency change perturbation, this study proposes a VSG frequency optimization control method for VSG frequency control with rated angular velocity ωset feedforward composed of multivariate factors based on the consideration of primary frequency regulation dead zone. The impact of VSG parameter design on the system is investigated through the system response characteristics of power scheduling and primary frequency regulation at grid connection and the small-signal dynamic characterization of the improved VSG. The improved control method system has an active power overshoot of 7% and a maximum frequency deviation of 0.17Hz. The improved control method improves the frequency response time by 0.1s and reduces the oscillation amplitude by 0.15Hz. The response speed of the improved control method is greatly improved, while the oscillation amplitude is reduced to meet the requirements of grid regulation. The VSG simulation model and experimental platform are constructed, and the simulation and experimental analysis verify the feasibility of the improved VSG control method.

    Keywords: virtual synchronous generator, Frequency regulation dead zone, power scheduling, Micro grid, Power system

    Received: 06 Aug 2024; Accepted: 14 Oct 2024.

    Copyright: © 2024 Li, Yang, Wang and Chu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Ji Li, Shangluo University, Shangluo, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.