风机中参数变化对变流器直流侧电容可靠性的影响分析

发布时间：2018-03-08 04:20

本文选题：风电机组　切入点：功率变流器　出处：《电力自动化设备》2017年11期 　论文类型：期刊论文

【摘要】：以风电机组功率变流器可靠性评估为背景,给出了一种直流侧电容的可靠性评估方法。基于电容的损耗计算方法,结合热网络结构,构建了直流侧电容的可靠性分析流程。综合考虑电容的可靠性影响因素,分析了环境温度、风速、电容等效串联电阻及热阻的变化对直流侧电容可靠性的影响。以某风电场2 MW双馈风电机组结合实际风速、气温数据为例进行验证,实例结果验证了理论分析的正确性。讨论了当风电变流器实际工作时,利用优化变流器直流侧设计或电容的散热环境等措施提高直流侧电容的可靠性,结果表明了所提方案的可行性。
[Abstract]:Based on the reliability evaluation of wind turbine power converter, a reliability evaluation method of DC side capacitance is presented. The reliability analysis flow of DC side capacitance is constructed. Considering the influence factors of capacitance reliability, the ambient temperature and wind speed are analyzed. The effect of the change of capacitance equivalent series resistance and thermal resistance on the reliability of DC side capacitance is verified by combining the actual wind speed and temperature data of a 2 MW doubly-fed wind turbine in a wind farm. An example is given to verify the correctness of the theoretical analysis. It is discussed that the reliability of the DC side capacitance can be improved by optimizing the DC side design of the converter or the cooling environment of the capacitor when the wind power converter works in practice. The results show that the proposed scheme is feasible.
【作者单位】：重庆大学输配电装备及系统安全与新技术国家重点实验室;
【基金】：国家重点基础研究发展计划(973计划)资助项目(2012CB215205)~~
【分类号】：TM315

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