并网DFIG风电系统性能研究

Distributed Generation & Alternative Energy Journal Pub Date : 2022-12-09 DOI:10.13052/dgaej2156-3306.38112

Bisma Hamid, Sheikh Javed Iqbal

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引用次数: 0

摘要

本文实现了对电网集成双馈感应发电机(DFIG)系统控制运行和性能的研究。电池储能(BES)耦合在DFIG直流链路上，由双向功率变换器控制，以补偿公用事业/负荷需求。转子侧变流器(RSC)采用叶尖速比最大功率点跟踪(MPPT)算法来利用风力发电机的最大功率。基于可调步长最小均方(LMS)的自适应控制实现了DFIG系统的电网侧转换器(GSC)，除了管理公共耦合点(PCC)的功率平衡外，还解决了由于非线性、不平衡负载的存在而在系统中遇到的电能质量问题。步长随均方误差的变化而变化，使自适应滤波器能够在产生小的稳态误差的同时检测系统变化。在已开发的Simulink模型中，通过稳态和动态条件下的仿真结果，展示并验证了系统的性能。电网电流和电压的总谐波失真(THD)符合IEEE 519标准。

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Performance Investigation of Grid Connected DFIG Based Wind Energy System

The paper realizes the investigation of control operation and performance in grid integrated Doubly Fed Induction Generator (DFIG) system. Battery Energy Storage (BES), coupled at the DC link of DFIG is controlled by bidirectional power converter to compensate for utility/load demand. Rotor side converter (RSC) uses tip-speed ratio maximum power point tracking (MPPT) algorithm to harness maximum power from the wind turbine. An adjustable step size least mean square (LMS) based adaptive control is implemented for the grid side converter (GSC) of DFIG system that besides managing power balance at the Point of Common Coupling (PCC) also addresses power quality issues encountered in the system due to the presence of non-linear, unbalanced loads. The step size changes with the mean square error enabling the adaptive filter to detect system changes while producing a small steady state error. Performance of the system is exhibited and validated through simulated results in a developed Simulink model for steady state and dynamic conditions. The Total Harmonic Distortion (THD) in grid currents and voltage is within IEEE 519 standard guidelines.

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Distributed Generation & Alternative Energy Journal

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