Operation of a Standalone Microgrid With an Advanced Discrete Generalized Integrator Based FLL Control

IF 3.8 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Power Delivery Pub Date : 2024-09-10 DOI:10.1109/TPWRD.2024.3457544

Sudip Bhattacharyya;Bhim Singh

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引用次数: 0

Abstract

This paper deals with an advanced discrete generalized integrator frequency-locked loop (DGI-FLL) control algorithm designed for regulating grid-side converter (GSC) of doubly-fed induction generator (DFIG). Its primary function is to ensure consistent regulation of DC-bus voltage of rotor side converter (RSC) and GSC. Notably, this advanced DGI-FLL control demonstrates robust performance even amidst fluctuations in wind speed and varying loads. By implementing advanced DGI-FLL control, notable enhancements in system dynamics such as improved rise time, delay time, and settling time are achieved across diverse load conditions. Furthermore, this control algorithm effectively addresses power quality (PQ) concerns associated with DFIG. Synchronization of DFIG stator windings with local grid is a pivotal aspect, with local grid established through a combination of a battery and a double-stage photovoltaic (PV) supported grid forming converter (GFC). Initially, open-circuit voltages and frequency are generated across stator windings of DFIG via stage-I RSC control. Subsequently field-oriented control (FOC) algorithm takes charge of RSC post-stator synchronization. This algorithm not only fulfills reactive component requirement of DFIG but also maximizes power extraction from wind turbine. Moreover, an energy storage system (ESS) based on batteries is integrated to store surplus energy and subsequently distributes it based on load demand. This paper presents comprehensive test results showcasing integrated performance of hybrid microgrid at varying load conditions, solar insolation and changes in wind speed. Notably, it demonstrates how total harmonics distortion (THD) for both current and voltage at point of common coupling (PCC) adhere to the standard set forth by the IEEE 519-2022.Std.

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使用基于 FLL 控制的先进离散广义积分器运行独立微电网

本文论述了一种先进的离散广义积分器锁频环（DGI-FLL）控制算法，设计用于调节双馈异步发电机（DFIG）的电网侧变流器（GSC）。其主要功能是确保转子侧变流器（RSC）和 GSC 的直流母线电压调节保持一致。值得注意的是，这种先进的 DGI-FLL 控制即使在风速波动和负载变化的情况下也能表现出稳健的性能。通过实施先进的 DGI-FLL 控制，在不同的负载条件下，系统的动态性能都得到了显著提升，例如上升时间、延迟时间和稳定时间都得到了改善。此外，这种控制算法还能有效解决与 DFIG 相关的电能质量（PQ）问题。 DFIG 定子绕组与本地电网的同步是一个关键环节，本地电网是通过电池和双级光伏（PV）并网转换器（GFC）建立的。最初，通过第一阶段 RSC 控制，在 DFIG 定子绕组上产生开路电压和频率。随后，面向现场的控制（FOC）算法负责 RSC 后定子同步。这种算法不仅能满足 DFIG 的无功分量要求，还能最大限度地从风力涡轮机中提取电能。此外，还集成了一个基于电池的储能系统 (ESS)，用于存储剩余能量，然后根据负载需求进行分配。本文提供了全面的测试结果，展示了混合微电网在不同负载条件、太阳日照和风速变化时的综合表现。值得注意的是，它展示了共用耦合点（PCC）的电流和电压总谐波失真（THD）如何符合 IEEE 519-2022.Std.

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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来源期刊

IEEE Transactions on Power Delivery 工程技术-工程：电子与电气

CiteScore

9.00

自引率

13.60%

发文量

513

审稿时长

6 months

期刊介绍： The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.