水轮发电机和汽轮发电机失磁和自励磁仿真

随着发电机容量的增大,机组一旦出现事故,即会造成不可估量的后果,故有必要对发电机的异常运行工况进行仿真。对水轮发电机和汽轮发电机失磁异步运行及自励磁工况进行动态过程仿真。先用模块化建模法建立包括发电机、调速器、励磁系统、输电线在内的全系统元件数学模型,再分别建立失磁及自励磁的系统模型,最后用M atlab中调用Fortran程序的方法编写仿真程序,仿真结果详细、逼真地再现了水轮发电机和汽轮发电机在各种失磁故障方式下的动态过程及同步自励磁、异步自励磁下的动态过程,为继电保护的整定和辅助装置的研制提供了一种有效的分析工具。

Simulation of dynamic processes for hydro-generator and turbine-generator under loss of excitation and self-excitation

With the enlargement of generator capacity,generator fault will cause immensurable consequence,so it is necessary to emulate the generator's abnormal operating condition.In the paper,the dynamic processes of excitation loss and self-excitation are simulated.Firstly,accurate mathematical models of system element are built with modular modeling method including generator,speed governor,excitation system and electric transmission line.Secondly,system models of excitation loss and self-excitation are built.Finally,simulative software is programmed with Matlab calling Fortran language.Dynamic processes of generator under different loss-exciting faults and synchronous,asynchronous self-excitation are simulated.The simulation results provide an effective diagnostic tool for relay protection setting and the auxiliary device development.