Risk Warning Of Anyang Power Grid Above 220kV

The demand for energy has been increasing day by day,and the energy industry has also developed to an unprecedented scale,with the continuous development of economy and society and the advancement of science and technology,since the beginning of the 21 st century.The rapid development of chinese power industry is directly reflected in the more complete power network structure,more flexible wiring modes for power grid operation,and the use of various automatic devices greatly increases power supply reliability.However,the risk of power grids is still there,especially main network accidents caused by power equipment faults often have serious consequences.Therefore,studying reliability and safety of power system operation,analyzing the weak links in power system,and finding out and early warning crises and risks of power grid operation remain important research topics.Firstly,the paper analyzes the basic state of power grid operation and the stability of power system,and studies the characteristics of each basic state and the conversion relationship.The concept of power grid crisis research and risk early warning is proposed,and the principles and methods of early warning are given.Secondly,the concept of power system crisis analysis and evaluation analysis is given,and three methods of analysis and evaluation of power grid crisis and risks are introduced.According to the scope of power outages and the severity of accidents,power system accidents are divided into 5 levels.An index factor system is builded for grid demand and power user demand.Finally,the historical natural disasters of Anyang Power Grid are statistically analyzed,and the accidents caused by natural disasters are analyzed and classified.The general laws of accidents are identified and effective and reliable preventive measures are proposed.The important sections of the Anyang Power Grid are collated,qualitative and quantitative analysis are performed on the problems existing in the section,and the risks are pre-warned.In the way of the normal flow and load distribution,N-1 calculation is performed on important sections in Anyang,and risk warnings are proposed for links that do not meet N-1(including main transformers and lines).In the paper,the weaknesses of Anyang power grid are identified by calculation and analysis,early warnings are made,and effective suggestions of the development and planning of power grids for weak points are proposed.