Study on Methods to Improve Low Voltage Direct Distribution Capability of Urban 220 kV Substations
The rapid development of Shenzhen's economy has brought about a rapid increase in electricity demand.In order to meet the demand for electricity supply,it is necessary to increase the construction and scale of the power grid.Howev-er,Shenzhen's land resources are already very scarce,and the development of power grid construction is severely con-strained.With the continuous growth of the total and density of power load in Shenzhen,the latest construction guidelines for 220 kV substations have required deepening the load center.In order to improve the low-voltage side direct distribution capability of Shenzhen 220 kV substations,this paper proposes the use of a new type of transformer with dual branches on the low-voltage side,which can solve this problem to a large extent.At the same time,in-depth study has been conducted on how to calculate the number of low-voltage side outgoing lines and verified through engineering examples,providing more choices for the power supply mode of 220 kV substations and improving equipment utilization.
power grid constructionnew-type 220 kV transformerlow voltage side dual-branchimproved direct distri-bution capability
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