Fuzzy secondary controller based virtual synchronous generator control scheme for microgrids

2017 IEEE Industry Applications Society Annual Meeting Pub Date : 2017-10-01 DOI:10.1109/IAS.2017.8101852

Chowdhury Andalib-Bin-Karim, Xiaodong Liang, Huaguang Zhang

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引用次数: 1

Abstract

In a microgrid with distributed generation (DG) units, proper control of the grid interfacing inverter is critical to facilitate safe and stable operation of the system. The droop control mechanism is a widely accepted control method in a microgrid operation. However, a droop controller is unable to provide inertia support in such systems, and thus, cannot contribute in primary frequency control during disturbances. The virtual synchronous generator (VSG) method was introduced in 2007 for the grid interfacing inverter control, this approach can provide virtual inertia support along with emulation of steady-state droop characteristics of synchronous generators. In this paper, a fuzzy secondary controller (FSC) based VSG control scheme is proposed for voltage and frequency regulation in microgrids. The proposed control scheme shows significantly improved dynamic performance when compared with conventional droop and conventional VSG control through several case studies. Its effectiveness and robustness is further evaluated through sensitivity studies.

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基于模糊二次控制器的微电网虚拟同步发电机控制方案

在具有分布式发电机组的微电网中，对并网逆变器的合理控制是保证系统安全稳定运行的关键。下垂控制机制是微电网运行中被广泛接受的一种控制方法。然而，下垂控制器不能在这样的系统中提供惯性支持，因此，不能在干扰期间进行一次频率控制。2007年提出了虚拟同步发电机(VSG)方法用于并网逆变器控制，该方法可以提供虚拟惯性支持并仿真同步发电机的稳态下垂特性。提出了一种基于模糊二次控制器(FSC)的VSG控制方案，用于微电网的电压和频率调节。通过实例分析，与常规下垂控制和常规VSG控制相比，该控制方案的动态性能得到了显著改善。通过敏感性研究进一步评价其有效性和稳健性。

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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2017 IEEE Industry Applications Society Annual Meeting

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