A Virtual Synchronous Machine Control applied to Photovoltaic Generation in Decentralized Microgrid

A. Cervi, Riccardo Stecca, Andrea Vian, F. Bignucolo
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引用次数: 5

Abstract

The increasing integration of renewable energy sources in microgrids has introduced new challenges in their control strategy management. The lack of inertia, due to the large presence of power-electronic interfaced generators, worsens network dynamic performances in the case of sudden variations in its working conditions and, as a result, the stability of microgrid may no longer be guaranteed. In order to ensure the stable operation of microgrid, the use of suitable controllers, applied to static generators for providing a power contribution during network perturbations, is a concrete way. In this work, a virtual synchronous machine control is developed for a photovoltaic plant, without deload requirements. Unlike the swing equation based inertial response, this control strategy appears more suitable since it ensures grid stability even when no reference frequency is locally available. Different simulations, carried out in DIgSILENT PowerFactory environment, validate the proposed control scheme for a test microgrid. Finally, the controller operation during low solar radiation periods is also illustrated.
分布式微电网中光伏发电的虚拟同步机控制
微电网中可再生能源的日益整合给微电网的控制策略管理带来了新的挑战。由于大量电-电接口发电机的存在,使得微电网在工作状态突然变化时缺乏惯性,使网络的动态性能恶化,从而使微电网的稳定性无法得到保证。为了保证微电网的稳定运行,采用合适的控制器,应用于静态发电机,在网络扰动时提供功率贡献,是一种具体的方法。本文研究了一种不带负载的光伏电站虚拟同步机控制方法。与基于摆动方程的惯性响应不同,这种控制策略似乎更合适,因为即使在局部没有参考频率的情况下,它也能确保电网的稳定性。在DIgSILENT PowerFactory环境中进行了不同的仿真,验证了所提出的微电网测试控制方案。最后,给出了控制器在太阳低辐射时期的运行情况。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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