利用功率扰动辨识水电站水力系统模型

结合某抽水蓄能电站机组现场试验,利用功率扰动下实测数据进行具有复杂输水系统的大型机组水力系统模型辨识.该辨识方法输入信号通过调整调速器给定功率获取,并不影响机组的正常试验和运行.使用增广最小二乘法进行辨识计算,利用先验知识检验、阶跃响应检验和残差白噪声检验三种方法对辨识结果进行验证.结果表明,所得辨识模型可信,利用功率扰动辨识水电站水力系统模型的方法可行.

Identifying the Hydraulic System Models in Hydroelectric Station Using Power Disturbance

Hydraulic system models identification and validation in hydroelectric station have been researched.With reference to experiments in a pumped storage power station,the models of hydraulic system in large hydraulic generating set with complicated conduit system had been identified by using field test data under power disturbance.The input signal of the identification method could be gotten by justifying the governor's given electric power and had no influence on hydraulic generating set's normal operation and experiment.Models were identified by extended least squares algorithm and validated by prior knowledge validation,step disturbance validation and self relation function validation.The results show that the identified model is reliable and the method of identifying the hydraulic system models using power disturbance is feasible.