基于电流轨迹相似度的双馈风电机群电磁暂态同调分群方法

发布时间：2018-09-01 06:25

【摘要】：合理的风电场等值建模是风电并网研究与运行的基础。双馈风电机群中各机组的正常运行状态、控制器暂态响应、保护动作情况可能不同,单个双馈感应发电机(doubly fed induction generator,DFIG)的暂态特性不能代表机群的整体特性。电力系统保护和控制的实施仍需解决风电机群暂态等值模型的欠缺。基于DFIG故障暂态过程的行为特征,充分考虑DFIG短路电流的特征信息,建立短路电流包络线轨迹结构相似度的评价指标,提出基于轨迹结构相似度的电磁暂态同调机群划分方法。算例表明,该方法能够有效辨别DFIG暂态过程的差别,满足电磁暂态分析机群等值的需求,且原理简单,易于实现。
[Abstract]:Reasonable wind farm equivalent modeling is the foundation of wind power grid research and operation. The transient state of each unit in the doubly-fed wind turbine cluster, the transient response of the controller and the protection action may be different. The transient characteristics of a single doubly-fed induction generator (doubly fed induction generator,DFIG) cannot represent the overall characteristics of the cluster. The implementation of power system protection and control still needs to solve the shortage of wind turbine cluster transient equivalent model. Based on the behavior characteristics of DFIG fault transient process and considering the characteristic information of DFIG short circuit current, the evaluation index of track structure similarity of short circuit current envelope is established, and the method of electromagnetic transient homology cluster partition based on trajectory structure similarity is proposed. The numerical examples show that the method can effectively distinguish the difference of DFIG transient process and meet the needs of electromagnetic transient analysis cluster equivalent, and the principle is simple and easy to implement.
【作者单位】：输配电装备及系统安全与新技术国家重点实验室(重庆大学);重庆城市管理职业学院;
【基金】：国家自然科学基金项目(51407017) 重庆市基础与前沿研究计划项目(cstc2015jcyj A90016) 中央高校基本科研业务费专项资金资助项目(106112015CDJXY150001)~~
【分类号】：TM614

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