以 IGBT 运行可靠性平衡为导向的孤岛直流微电网分布式协调控制策略

IF 4.2 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2025-04-09 DOI:10.1016/j.epsr.2025.111656

Yuan Gao, Lucheng Hong, Minghe Wu, Jie Gu, Wu Chen

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引用次数: 0

摘要

由于并联DC/DC转换电路中igbt的发热特性和线路电阻的差异，不同的热应力会导致应力较高的igbt更早失效，从而降低整体电源的可靠性。为此，本文提出了基于IGBT运行可靠性平衡的孤岛直流微电网协调控制策略。通过在传统的下垂控制中加入温度均衡项，使各并联DC/DC变换器中IGBT的结温趋于一致。针对孤岛直流微电网集中控制下通信压力大的问题，提出了基于共识算法的孤岛直流微电网IGBT可靠性平衡控制方法。利用MATLAB/Simulink和PLECS/Blockset联合建立仿真模型，验证了所提策略的有效性。最后，对采用该控制策略前后的IGBT寿命损伤进行了分析。具体数据表明，传统俯仰控制的最大IGBT寿命损伤为0.2973，平均IGBT寿命损伤为0.1071。相比之下，该控制策略的IGBT寿命损伤降低到0.0201，最大寿命损伤和平均寿命损伤分别降低了约93.2%和81.2%。

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Distributed coordinated control strategy of the islanded DC microgrid oriented by IGBT operation reliability balance

Due to differences in the heating characteristics of IGBTs in parallel DC/DC converter circuits and line resistance, varying thermal stresses cause IGBTs with higher stress to fail earlier, reducing the overall power supply reliability. In this regard, this paper proposes the coordinated control strategy of the islanded DC microgrid oriented by IGBT operation reliability balance. By adding the temperature equalization term in traditional droop control, the junction temperature of the IGBT in each parallel DC/DC converter tends to be consistent. Moreover, the IGBT reliability balance control of the islanded DC microgrid based on consensus algorithm is proposed, considering the high communication pressure under centralized control. The effectiveness of the proposed strategy was verified by jointly building the simulation model using MATLAB/Simulink and PLECS/Blockset. Finally, the IGBT lifetime damage is analyzed before and after adopting the proposed control strategy. The specific data shows that the maximum IGBT lifetime damage of traditional droop control is 0.2973, and the average IGBT lifetime damage is 0.1071. In contrast, the IGBT lifetime damage of the proposed control strategy is reduced to 0.0201, with the maximum lifetime damage and average lifetime damage reduced by approximately 93.2 % and 81.2 %.

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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.