Frequency Stability Analysis And Evaluation Of Xin Jiang Power Grid

Security and stability are the most important qualifications of power system.Once power system destroy,it must be cause economic damage.Frequency is the target of power.Hight voltage,wide power grid and large machine are characters of power system now.But this will influence the stabilizations of frequency.So analysis of frequency of power system,especially in local electric power system.This article summarize the current status of frequency research,and analyses the frequency stability of xinjiang power grid in 2009 based on the power system simulation software-PSASP.The time-domain simulation model for the frequency analysis with multi-machines system is found and analyzed. Simulation and Analysis the frequency change when the larger generator tripping or important line fault,and the fluctuations in grid frequncy,and compared the load-shedding in difference methods.This article analysis the frequency stability of HeTian region power gird,and the effect of electric components model and parameters,like generator and Load, The electromotive force variation of transient and sub-transient process in every turbine set is considered. Also typical turbine governor model and exciter model are included as well.Frequency dynamics analyzed based on the time-domain simulation model with multi-machines system. The under frequency load shedding scheme ameliorated,correlation study carried with frequency stability measures. The effects of these elements of frequency stability from the point of view of time-domain simulation.