关键词: 电网规划, 受端系统, 接入系统

Abstract:

The development of power network in China has entered the new stage of bulk power network interconnection and trans-regional power network interconnection.It is imperative for the operation of the whole power network to reinforce the network of the receiving system.In the planning of the receiving system,the determination of the voltage level for the access of a large-scale power plant to the power grid is significant to the power and voltage supports of the receiving system as well as to the operation of the inner power network in the receiving system.On the basis of the practical experiences of power system planning,this paper analyzes the advantages of the access of a large-scale power plant to the 500 kV power network,and the problems to be considered.A case study is finally presented to illustrate how to use the principles,such as simplifying the wire connection in power plant,diocrsifi-caring the external powers sources and connecting the network by layers and zones,to determine the voltage level
for the access of a large-scale power plant to the power grid.

Key words: power system planning, receiving system, access system