感应发电机接入配电网的短路计算序分量模型及算法

发布时间：2018-06-23 14:40

本文选题：短路电流 + 序分量模型　；参考：《中国电机工程学报》2014年07期

【摘要】：分布式发电大规模接入电网将改变潮流和短路电流的分布。利用感应发电机(induction generator,IG)正负序静态等值电路,研究电网不对称故障时定转子磁链序分量相关系数,并结合故障过程中IG暂态磁链特性和转差,建立IG短路计算的序分量电流源模型。比较计及转差前后和不同接入容量时多感应发电机(induction generators,IGs)端电压和短路电流响应,揭示出IGs短路电流与电网节点电压的耦合关系。推导电网故障瞬间IG暂态等值电势,提出计及转差变化的多IGs配电网短路电流的对称分量迭代算法。采用PSCAD/EMTDC仿真软件中IG的5阶动态模型,仿真验证了所提方法的正确性。
[Abstract]:The distribution of power flow and short-circuit current will be changed by large-scale access of distributed generation. Using the induction generator (induction generator) static equivalent circuit, the correlation coefficient of the sequence components of stator and rotor flux chains in the asymmetric fault of power network is studied, and the transient flux characteristics and slip of IG in the process of fault are combined. An order component current source model for IG short circuit calculation is established. By comparing the terminal voltage and short-circuit current response of induction generators with different connection capacity and before and after transposition, the coupling relationship between short circuit current and node voltage is revealed. In this paper, the transient equivalent potential of IG is derived, and an iterative algorithm of symmetric components of short circuit current in multi-IGs distribution network is presented, which takes into account the variation of slip. The 5 th order dynamic model of IG in PSCAD / EMTDC simulation software is used to verify the correctness of the proposed method.
【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);云南电力试验研究院(集团)有限公司;
【基金】：国家自然科学基金项目(51277184) 输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512711209)~~
【分类号】：TM713

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