研究电机参数不平衡时双馈电感发电机发电模式的数学模型

A.O. Postil, O.V. Bialobrzheskyi
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引用次数: 0

摘要

对双发电机系统的分析揭示了多种模型,其中大多数建立在α-β和d-q坐标系下。考虑了电网电压的不平衡,建立了模型和控制系统。综合了三相双电源发电机的模型,考虑了定子和转子电气参数的不对称性。对具有对称和非对称参数的电机绕组模态进行了建模。不平衡是通过改变其中一个定子和/或转子相的电感和电阻来实现的。在这两种情况下,从电压频率和有效值两方面都得到了所需的发电方式。在绕组参数不平衡的情况下,注意到产生电压的不对称性和频率为100 Hz的电磁力矩脉动的发生。利用该方法对正、负、零序列的电压和电流所产生的电功率进行分析,根据仿真结果发现,在不对称情况下,随着负序功率分量的出现,正序功率的分量也会发生变化。随着机床参数不对称性的增大,指示功率分量增大
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Double feed inductor generator mathematical model for studying generation modes with unbalance of electrical machine parameters
The analysis of systems using dual power generators revealed a variety of models, most of which are built in the α-β and d-q coordinate systems. Models and control systems are made taking into account the unbalance of the voltage of the electrical network. A model of a three-phase dual-supply generator with the possibility of introducing asymmetry of the electrical parameters of the stator and rotor has been synthesized. Modes with symmetric and asymmetric parameters of the machine windings were modeled. Unbalance is implemented by changing the inductance and resistance of one of the stators and/or rotor phases. In both cases, the required generation mode was obtained both in terms of voltage frequency and its effective value. In the case of unbalance parameters of the windings, asymmetry of the generated voltage and the occurrence of pulsations of the electromagnetic moment with a frequency of 100 Hz were noted. Using the approach to the analysis of the electric power caused by the voltage and current of positive, negative and zero sequences, according to the simulation results, it was noted that in the case of asymmetry, along with the appearance of the components of the negative sequence power, changes in the components of the positive sequence power occur. The indicated power components increase with increasing asymmetry of machine parameters
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