Closed loop current cooperative control method for distributed power distribution network with closed loop delay considered
Distribution network fault recovery depends on the looping operation,but the impulse current generated during the looping process may cause the line current to exceed the limit,which may not only damage the equip-ment,but also endanger personal safety.Currently,the suppression of closing current is mostly focused on the o-verall optimization,but not on the impact current generated by the closing transient process.In particular,there is a delay between the issuance of the closing command and the actual closing of the loop in the distribution center,which will directly affect the size of the closing ring impulse current.The existing methods assume that the closing operation is completed immediately,ignoring the delay of the closing ring,and that may further cause the suppres-sion of the closing ring impulse current to fail to achieve the expected goal.For this reason,a method considering the synergistic suppression of the closing loop impulse current by the closing loop delay and DG control is presen-ted.By analyzing the generation process and principle of closed-loop impulse current in distribution network,the influence of DG output and closing delay on closed-loop impulse current is depicted,and a control optimization model of DG active control and closing-loop cooperation is established.A collaborative control method for closed-loop impulse current in distribution network with distributed power supply considering closing delay is presented.The example shows that this method can minimize the closing impulse current during the recovery process of distri-bution network and improve the safety of distribution system by optimizing DG output and the expected closing time.
loop closure delaydistributed power supplycollaborative controloptimization algorithm
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维普
