Fault recovery uniform model method simultaneously considering reconstruction and island division for active power distribution network

Abstract

The invention discloses a fault recovery uniform model method simultaneously considering reconstruction and island division for an active power distribution network. The fault recovery uniform model method comprises the following steps of 1) acquiring power grid fault information and power distribution network information, and summarizing data required by model construction; 2) determining a target function of a fault recovery running strategy; 3) building a uniform mathematical model containing DistFlow power flow constraint, employing virtual power flow connection constraint and comprising reconstruction and island division; and 4) solving the built uniform mathematical model comprising reconstruction and island division to obtain a final fault recovery running strategy of the active power distribution network. The fault recovery running strategy of the power distribution network simultaneously considers two strategies of network fault reconstruction and island division, and the controllability of load and distribution power supply output is considered; and compared with a traditional power distribution network fault recovery, the fault recovery strategy is optimized and cover more possibilities, the problem is converted to hybrid integer linear planning, the strategy generation time is saved, and the optimal solution can be more accurately solved.

Description

technical field [0001] The invention relates to a method for a unified fault recovery model of an active distribution network considering both reconstruction and island division, and belongs to the field of distribution network operation and planning. Background technique [0002] Today, due to the access of distributed power sources and the popularization of flexible loads, the distribution network has developed into a more controllable, changeable, and complex network, which has also prompted scholars to improve the traditional distribution network fault recovery operation strategy , after a fault occurs in the distribution network, by changing the network topology, that is, fault reconstruction, the economic benefit of the power grid can be optimized on the basis of ensuring the reliability of power supply. At the same time, in the event of a network failure, after the subsequent lines are automatically disconnected, the black start function of the distributed power suppl...

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Problems solved by technology

[0003] In terms of algorithm, for the island division, some scholars use the knapsack tree (TKP) tree algorithm and add the island fusion judgment after the calculation. have an impact

Some scholars also use mixed integer second-order cone programming, but set the number of islands as the number of distributed power sources, which does not consider the integration of islands, which also limits the further optimization of the strategy

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