A Fault Recovery Method for Flexible Interconnected Low-voltage Distribution Network Considering Multiple Fault Scenarios
A multi-device coordinated fault recovery method is proposed for the N-1 and N-2 fault scenarios of multi-transformer flexible interconnected transformer.Firstly,the characteristics of trans-former N-1 and N-2 fault scenarios and the coordinated fault recovery process of bus coupling switch and SOP in distribution station under each scenario are sorted out;secondly,considering the constraints of network operation and equipment capacity in the process of fault recovery,a fault recovery model of flexi-ble interconnected distribution network with the goal of maximizing load weighted recovery is established,and it is transformed into second-order cone solution;finally,the effectiveness of the proposed method is verified in a typical low-voltage distribution network topology with 21-node+21-node flexible intercon-nection,which proves that it can effectively improve the ability of important loads to guarantee power sup-ply after transformer failure.
flexible interconnectionfault recoverysoft open pointtransformer faultsecond-order cone
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