基于测功法甩负荷试验的汽轮发电机组主要动态特性参数的辨识

DYNAMIC PARAMETER IDENTIFICATION OF THE STEAM TURBINE-GENERATOR BY LOAD REJECTION TEST USING DYNAMOMETRY METHOD

结合汽轮发电机组系统模型的已有成果 ,分析了汽轮发电机组主要动态特性参数 ,提出利用测功法甩负荷试验提供的关键测量数据辨识汽轮发电机组主要动态特性参数 ,并对这些参数进行了可分离辨识的讨论。将遗传算法应用于参数辨识 ,效果良好。辨识得到的汽轮发电机组动态特性参数可用于转速飞升过程等动态特性分析 ,对提高测功法甩负荷试验的技术水平和经济效益具有实际意义。

According to the known mathematic model of stream turbine-generator, the load-rejection test using dynamometry method is applied to dynamic parameter identification of stream turbine-generator after the parameters are analyzed. Moreover, whether the parameters can be identified separably is also discussed. Genetic algorithms are chosen as the identification algorithms with good results. The identified parameters can be used for dynamic characteristic analysis of such processes as speed runaway and so on, which is significant for the improvement of technology and economic benefits of load-rejection test using dynamometry.