Study On The Main Wiring Scheme Of 1000kV UHV Sending From Weijiamao Power Plant

The main electrical wiring is a circuit that receives and distributes electrical energy by electrical primary equipment in accordance with the power production sequence and functional requirements.It is the main part of the electrical part of the power plant and the substation,and is also an important part of the power system network.The choice of electrical main wiring scheme has a decisive influence on the selection of various electrical equipments,the layout of power distribution equipment,the protection of relays and the formulation of control methods.The safe and stable operation of the power system is closely related to the form of electrical main wiring.With the rapid development of power systems,power generation capacity has gradually increased,voltage levels have also increased,so that the reliability requirements for electrical main wiring have become higher and higher.The form of electrical main wiring of power plants has a very high reliability for power plant operation.Therefore,the design and comprehensive evaluation of the electrical main wiring scheme of power plants has great research significance.In this paper,the main electric connection scheme of thermal power plant is studied.Taking the Weijiamao coal-electricity integrated power plant as an example,several main electrical wirings for large-scale thermal power plants with 1000kV UHV power transmission are proposed.A viable alternative is to determine the optimal solution through comprehensive evaluation of various aspects,and select the main equipment to determine the layout.The main results of the paper are as follows:(1)Introduce the current situation of Weijiamao Thermal Power Plant,and initially determine four electrical main wiring schemes according to its construction scale and expansion plan;(2)The optimal electrical main wiring scheme is determined by comprehensive evaluations of the four electrical main wiring schemes which compares the reliability,flexibility and economy of the main wiring,reliability and independence of backup power..(3)According to the electrical main wiring scheme of the thermal power plant and the environmental conditions such as geographical location,meteorological conditions,and pollution degree,select the main equipment in the main wiring and determine the layout.