基于派克矢量轨迹椭圆度的海上双馈电机定子绕组匝间短路早期故障辨识

发布时间：2018-04-13 07:49

本文选题：海上风电 + 双馈电机　；参考：《中国电机工程学报》2017年10期

【摘要】：随着我国海上风电产业逐渐向深远海发展,迫切需要精确的早期故障辨识技术,以防止故障恶化造成的巨大经济损失。针对派克矢量故障辨识方法用在双馈并网系统时易受定子电压不平衡和负载变化的影响的不足,提出新的故障特征量——派克矢量轨迹椭圆度F_s。分析F_s和定子负序电流间的关系,运用非线性最小二乘法估计定子电压不平衡、负载变化和定子负序电流间的函数关系,以滤除定子电压不平衡和负载变化对F_s的影响。实验结果表明,该方法能够实现早期故障的精确辨识,对定子电压不平衡和负载变化具有鲁棒性。
[Abstract]:With the development of offshore wind power industry in China, it is urgent to develop the accurate early fault identification technology to prevent the huge economic loss caused by the deterioration of the fault.In order to overcome the shortcomings of Pike vector fault identification method which is easy to be affected by stator voltage imbalance and load variation in doubly-fed grid-connected systems, a new fault characteristic quantity, the ellipticity of Parker vector locus, is proposed.The relationship between FPS and stator negative sequence current is analyzed, and the nonlinear least square method is used to estimate the relationship between stator voltage imbalance, load change and stator negative sequence current, so as to filter out the influence of stator voltage imbalance and load change on Fs.Experimental results show that the proposed method can accurately identify early faults and is robust to stator voltage imbalance and load variation.
【作者单位】：上海电力学院电气工程学院;上海东海风力发电有限公司;
【基金】：上海市科技创新行动计划(16DZ1203504) 上海绿色能源并网工程技术研究中心(13DZ2251900)~~
【分类号】：TM315

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