Optimization Design of Electrical Main Wiring in 35 kV Substation
In the operation of power systems,network topology optimization(NTO)based on the bus branch model and open/closed transmission lines has been proposed as a tool to alleviate congestion and reduce operating costs.However,this model cannot provide detailed information on conventional substation switching(such as bus separation).Therefore,based on the NTO model,this paper proposes a method of tightening the boundary to maintain reliability and accelerate computation to alleviate congestion.At the same time,based on the sensitivity analysis of the substation,a method of applying network clustering to the blocking area is proposed to reconstruct the main connection object of the substation,thereby significantly reducing the number of binary variables related to circuit breaker switches.The results show that applying the NTO model to the IEEE 118 node testing system significantly reduces the number of switching actions compared to bus branch switching,and has a significant effect in eliminating blocking.
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