基于广域测量的汽轮发电机励磁反步控制方法  

Excitation Backstepping Control Method of Turbogenerator Based on Wide Area Measurement

作　　者：卢建刚[1] 戴月 曾凯文 李世明[1] 龙建平 李德忠 LU Jiangang;DAI Yue;ZENG Kaiwen;LI Shiming;LONG Jianping;LI Dezhong(Guangdong Power Grid Power Dispatching and Control Center,Guangzhou 510600,China;Hunan Datang Xianyi Technology Co.,Ltd.,Changsha 410007,China)

机构地区：[1]广东电网电力调度控制中心,广东广州510600 [2]湖南大唐先一科技有限公司,湖南长沙410007

出　　处：《机械与电子》2024年第3期65-70,共6页Machinery & Electronics

摘　　要：由于汽轮发电机励磁反步控制过程中没有实时获取发电机的运行数据,致使电机励磁反步控制效果较差,为此提出基于广域测量的汽轮发电机励磁反步控制方法。通过广域测量系统的同步相量测量单元,实时采集汽轮发电机功角与电流等运行数据,将采集的运行数据变更成标幺值形式,根据该形式建立汽轮发电机励磁控制的数学模型,获取励磁反步控制变量,并结合反步法,设计汽轮发电机励磁反步控制器,通过径向基函数神经网络估计控制器内的扰动,完成控制器扰动补偿。实验结果表明:该方法可精准采集汽轮发电机运行参数,有效反步控制汽轮发电机励磁,令汽轮发电机功角与转子角速度等迅速恢复至稳定状态,具备较优的反步控制效果;应用该方法后,可确保电网运行稳定性,降低故障后电网切机量。Due to the lack of real-time operation data of the generator in the process of excitation backstepping control of turbogenerator,the effect of motor excitation backstepping control is poor.Therefore,a method of excitation backstepping control of turbogenerator based on wide area measurement is proposed.Through the synchronous phasor measurement unit of the wide area measurement system,the real-time operation data such as power angle and current of the steam turbine generator are collected,and the collected operation data are changed into the form of per unit value.According to this form,the mathematical model of the excitation control of the steam turbine generator is established,and the excitation backstepping control variables are obtained.Combined with the backstepping method,the excitation backstepping controller of the steam turbine generator is designed,and the disturbance in the controller is estimated through the radial basis function neural network to complete controller disturbance compensation.The experimental results show that this method can accurately collect the operating parameters of the turbogenerator,effectively reverse step control the excitation of the turbogenerator,and quickly restore the power angle and rotor angular velocity of the turbogenerator to a stable state,with better reverse step control effect;after applying this method,the stability of power grid operation can be ensured and the amount of power grid cut-off after fault can be reduced.

关 键 词：广域测量 汽轮发电机 励磁反步控制 控制器 扰动补偿 

分 类 号：TM341[电气工程—电机]