电力系统知识要点（Main points of power system knowledge）.docVIP

电力系统知识要点（Main points of power system knowledge） I. composition of an electric power system A complete power system consists of various types of distribution around the power plant, the step-up and step-down substation, transmission lines and power users, they are complete electrical production, voltage transformation, power transmission and distribution and use of energy. Two. Division of power networks, power systems and power systems Power network: a network consisting of power transmission equipment, substation equipment, and distribution equipment. Power system: power generation equipment on the basis of the power grid. Power system: Based on the power system, the power plant parts (such as thermal power plant boiler, steam turbine and hydro power plant reservoir, hydraulic turbine and nuclear power plant reactor etc.) are included in the system. Three. Characteristics of power system operation First, the total amount of economy is big. At present, Chinas power industry asset size has more than 2 trillion, accounted for a total of 1/4 of the state-owned assets, electricity production directly affects the healthy development of the national economy. The two is at the same time, a large number of electricity can not be stored, unity composed of all sectors can not be separated, the transition process is very rapid, instant production power must be equal to the moment for every aspect of power, so the power production of the power generation, transmission and distribution are very important to the user. The three is concentrated, electricity production is highly centralized and unified, no matter how many power plants, power companies, power grid must be unified, unified management, unified management; safety production, organization and discipline, occupation morality has strict requirements. The four is applicability, the service object of power industry is all-round, involving all the people in the whole society, power quality, electricity price level and the in