Safety And Stability Analysis Of The LongNan Power Grid

With the development process of the global power grid,the stability of the power grids have been damaged at domestic and foreign,which results in a large area power outage,therefore the social and people's lives have a huge impact.Since the year of 1980,the domestic power grid blackouts occurred up to more than 100 time Therefore,it is of great significance to study the stability and security of power system.The paper selected the actual data of Longnan power grid in the year of 2017,and completed the model building of Longnan power grid in the simulation software.It provides technical support.to the ensure the safety,stability and economic operation of Longnan power grid,The paper will provide references and suggestions for the dispatching control and power network planning of Longnan power grid.This paper selects the next year for the study of the planning period,select the next year for the study of the planning period,from 2017 Longnan power grid planning grid on the grid,first carries on the forecast to the Longnan power grid in the next 1 years,the power load,according to the 2017 Longnan power grid load forecasting data,respectively,analysis of power grid at the moment of peak load and peak load in winter in the summer,analysis,power flow analysis,the main transformer N-1 circuit N-1,which can determine the weak link of the grid,and the power system security and stability.At the same time,the stability of the short-time dynamic of Longnan power grid is analyzed through the calculation of short-circuit current in the grid.Then we can find if the interrupting capacity of the breaker can meet the requirements.At the three-phase short circuit fault of line,generator,transformer,we simulate the fault of Longnan power grid using PSD software,and then identify the weak of the grid.At last,we puts forward lots of proposals to improve the safety and stability of Longnan power grid.