Research Of The Synchronous Generator Excitation Control System Based On Simulation

The excitation control system plays an important role in power system.It can be used to maintain generator terminal voltage and improve power system stability.This paper makes a research on excitation control system and gives concerning conclusions by the type of simulation.Besides,some new control methods are proposed and a kind of simulation platform of excitation control system is established.This paper starts with the models of synchronous and excitation system,modifies the synchronous model in virtue of the need of research,and makes an introduction of measurement unit,control unit and main-loop models of excitation system.Besides,a type of Nonline-PID control scheme which has better performance is put forward based on common PID control.Secondly,this paper makes simulations on PID control,Nonline-PID control and Fuzzy-PID control under step-response and sudden-load change in the case of brush and brushless excitation system.Besides,concerning conclusions are given on the basis of analytic result of terminal voltage output of generators.Also,a new control type based on electric motor is put forward,the principle of which is based on excitation current closed-loop control.At the same time,control precision is considered at the basis of Noline-PID control.Two schemes used to make the new control type true are shown in this paper,and the research method is the same as the control type above.Tests show that this type has higer superiority in speediness and stability.Finally,this paper establishes a simulation software platform based on MATLAB GUI,in virtue of which users can easily set parameters,modify models,observe results and operate figures,etc.The platform simplifies the course and improves efficiency of simulation operation.Besides,the interface provides worthy reference for the establishment of other types of simulation platform.