Linearized power flow-based network reconstruction method for power distribution network

Abstract

The invention provides a linearized power flow-based network reconstruction method for a power distribution network and belongs to the technical field of operation control of power systems. The methodcomprises the steps of firstly building a network reconstruction model, formed by an objective function and constraint conditions, of the power distribution network; transforming the objective function and the constraint conditions separately and transforming an original model into a mixed integer quadratic programming model; and solving the transformed model to obtain open and closed state variables of various branches and carrying out corresponding switching actions according to the solving result to achieve network reconstruction. The linearized power flow-based network reconstruction method is high in computation speed and good in convergence and is suitable for being applied to the scenes of real-time network reconstruction of the power distribution network.

Description

technical field [0001] The invention relates to a distribution network reconfiguration method based on linearized power flow, and belongs to the technical field of power system operation control. Background technique [0002] The distribution network is an important part of the power system. Compared with the transmission network operating in the ring network, although the distribution network has a loop tie line, the tie line is generally disconnected during operation, and its network operation structure is radial. . Therefore, in the distribution network, the change of network structure is the basis and important means for various distribution network applications. [0003] The network reconfiguration of the distribution network is a method to adjust the control network structure to optimize various distribution network operation indicators including the minimum network loss and load balance. It achieves specific goals through the opening and closing of branches in the ne...

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Problems solved by technology

[0005] At present, the commonly used distribution network reconfiguration methods include heuristic algorithms such as genetic algorithms, and obtain feasible solutions by searching all possible reconfiguration schemes. The disadvantage is that it is difficult to obtain the optimal solution, and when the operating conditions change, it often needs Adjust algorithm parameters to re-adapt to new situations

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