基于时步有限元的抽水蓄能电机瞬态参数计算方法的对比

发布时间：2018-02-16 12:47

本文关键词： 抽水蓄能电机场路耦合时步有限元瞬态参数冻结磁导率法　出处：《电工技术学报》2015年01期 　论文类型：期刊论文

【摘要】：为准确计算抽水蓄能电机分别运行于发电及电动工况时的瞬态参数,本文基于单元电机建立了抽水蓄能电机的场路耦合时步有限元模型。采用包络线法得到空载突然三相短路时电机的瞬态参数(简称包络线法),同时用冻结磁导率法得到空载突然三相短路时定转子绕组漏抗及电枢反应电抗,由各瞬态参数定义式得到瞬态参数(简称冻结磁导率法)。将冻结磁导率法计算值与设计值分别代入短路电流解析式中得到短路电流波形,与时步有限元仿真波形相比,冻结磁导率法计算波形与之更为接近。将这两种瞬态参数计算方法应用于实验室6极反装水轮发电机,与实验结果对比验证了两种计算方法的有效性和可行性。
[Abstract]:In order to calculate the transient parameters of pumped storage motor (Pumped-storage motor), In this paper, a field-circuit coupled time-step finite element model of pumped-storage motor is established based on the unit motor. The transient parameters of the motor are obtained by using the envelope method, and the frozen permeability is also used to obtain the transient parameters of the motor in the case of a sudden three-phase short circuit with no load (abbreviated as the envelope method). The leakage reactance and armature reaction reactance of stator rotor winding and armature reaction are obtained by the method of no-load and sudden three-phase short circuit. The transient parameters are obtained from the definition of each transient parameter (the frozen permeability method for short). The calculation value of the frozen permeability method and the design value are respectively substituted in the short-circuit current analytical formula to obtain the short-circuit current waveform, which is compared with the time-step finite element simulation waveform. The calculation waveform of frozen permeability method is more close to it. The two transient parameter calculation methods are applied to the 6-pole reverse hydrogenerator in laboratory. The comparison with the experimental results shows the validity and feasibility of the two calculation methods.
【作者单位】：华北电力大学电气与电子工程学院;哈尔滨大电机研究所;
【基金】：国家科技支撑计划资助项目(2011BAF03B02)
【分类号】：TV743;TV34

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