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Short-circuit test based maximum likelihood estimation of stability model of large generators

机译:基于短路测试的大型发电机稳定性模型的最大似然估计

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摘要

This paper presents a time-domain statistical identification method for synchronous-machine linear parameters from the standard line-to-line short-circuit test. The measurements are recorded on a 13.75-MVA hydrogenerator at Hydro-Quebec's Rapide-des-Quinze generating station. A complete mathematical model for synchronous machine asymmetrical test analysis is proposed. An efficient algorithm is built to accurately calculate the standard equivalent circuit from time-constants and operational inductances. The maximum likelihood estimator derived from the generalized least-squares method is then used for parameter identification. Validation of the estimated model response against the measured running-time domain data confirms the effectiveness of the proposed estimation technique.
机译:本文提出了一种基于标准线间短路测试的同步机线性参数时域统计识别方法。测量结果记录在魁北克水电公司Rapide-des-Quinze发电站的13.75-MVA加氢器上。提出了同步电机非对称测试分析的完整数学模型。建立了一种有效的算法,可以根据时间常数和工作电感来精确计算标准等效电路。然后,将从广义最小二乘法得出的最大似然估计器用于参数识别。针对测得的运行时域数据对估计的模型响应进行验证,证实了所提出的估计技术的有效性。

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