面向低电压穿越工况的DFIG变流器IGBT结温管理  

IGBT Junction Temperature Management in DFIG Converter for Low-Voltage Ride-Through Condition

作　　者：杨晨 乐应波 杨程 李伟邦 何鑫 崔昊杨 Yang Chen;Yue Yingbo;Yang Cheng;Li Weibang;He Xin;Cui Haoyang(School of Electronics and Information Engineering,Shanghai University of Electric Power,Shanghai 201306,China;Nanrui Semiconductor Testing Center,Nanjing 211100,China)

机构地区：[1]上海电力大学电子与信息工程学院,上海201306 [2]南瑞半导体测试中心,南京211100

出　　处：《半导体技术》2025年第5期523-531,共9页Semiconductor Technology

基　　金：上海市自然科学基金(23ZR424400)。

摘　　要：低电压穿越(LVRT)期间,电压骤降会导致双馈风电机组(DFIG)电流严重畸变,变流器中IGBT模块的瞬时功耗急剧上升,器件过温失效风险剧增。通过仿真实验分析了LVRT工况下变流器的温升特性,提出了一种结合硬件保护电路与开关频率调节的结温治理方法。引入投资回报比(ROI)作为开关频率选取依据,平衡温升与电流总谐波失真(THD)增长率。采用量子粒子群优化(QPSO)算法确定最优开关频率,并与卸荷撬棍电路协同,有效抑制了温升。仿真结果表明,网侧电压跌至0.3 p.u.时,所提策略使IGBT故障瞬间温升波幅降低37%,穿越期间温升波幅降低58%,有效抑制了LVRT工况下的温升现象。During low voltage ride-through(LVRT),voltage sags can cause severe distortion of current in doubly-fed induction generator(DFIG),and the transient power consumption of the IGBT modules in the converter rises sharply,increasing the risk of over-temperature failure of the devices.The temperature rise characteristics of converters under LVRT conditions were analyzed through simulation experiments,and a junction temperature management approach that combined hardware protection circuits with switching frequency regulation was proposed.The return on investment(ROI)as the criterion for switching frequency selection was introduced to balance the temperature rise with the growth rate of total harmonic distortion(THD)of current.The quantum-behaved particle swarm optimization(QPSO)algorithm was employed to determine the optimal switching frequency and synergize with a crowbar circuit to effectively suppress the temperature rise.Simulation results show that the proposed strategy reduces the instantaneous temperature rise amplitude of IGBTs fault instant by 37%when the grid voltage drops to 0.3 p.u.,and reduces the temperature rise amplitude during the ride-through period by 58%,which effectively suppresses the temperature rise phenomenon under the LVRT operating condition.

关 键 词：IGBT模块 低电压穿越(LVRT) 热管理策略 电流谐波 开关频率 硬件保护电路 

分 类 号：TN32[电子电信—物理电子学] TN306