Influence of low-voltage ride-through control techniques on the thermal behavior of power converters applied to wind energy conversion systems based on the doubly-fed induction generator

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2024-11-18 DOI:10.1016/j.epsr.2024.111272

Igor Rodrigues de Oliveira , Fernando Lessa Tofoli , Victor Flores Mendes

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引用次数: 0

Abstract

Doubly-fed induction generators (DFIGs) are particularly sensitive to voltage sags, which can potentially damage the back-to-back converter in wind energy conversion systems (WECSs). In particular, the rotor-side converter (RSC) may experience overvoltage and, consequently, overcurrent under such disturbances. While numerous low-voltage ride-through (LVRT) techniques that can ensure compliance with modern grid codes and maintain overall system stability are available in the literature, little attention has been given to the thermal analysis of power semiconductors during voltage sags. This work thoroughly analyzes key variables in DFIG-based systems subjected to symmetrical and asymmetrical disturbances, focusing on thermal stresses on the back-to-back converter. Distinct LVRT control techniques and their impacts on the junction temperature of power semiconductors are also assessed in detail, using simulations in PLECS software. The results show that these techniques can effectively mitigate switching losses and conduction losses at the onset of the sag, directly influencing the operating temperature and lifespan of the devices.

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低电压穿越控制技术对应用于基于双馈感应发电机的风能转换系统的功率转换器热行为的影响

双馈感应发电机（DFIG）对电压骤降特别敏感，而电压骤降可能会损坏风能转换系统（WECS）中的背靠背变流器。特别是在这种干扰下，转子侧变流器（RSC）可能会出现过电压，进而导致过电流。虽然文献中提供了大量低电压穿越（LVRT）技术，可确保符合现代电网规范并保持系统整体稳定性，但很少有人关注电压骤降期间功率半导体的热分析。本研究深入分析了基于双馈变流器的系统在对称和不对称干扰下的关键变量，重点关注背靠背变流器的热应力。通过使用 PLECS 软件进行模拟，还详细评估了不同的 LVRT 控制技术及其对功率半导体结温的影响。结果表明，这些技术可以有效地减轻骤降开始时的开关损耗和传导损耗，直接影响器件的工作温度和使用寿命。

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.