Optimal island partition calculation method involving distributed power-supply power distribution network

Abstract

The invention discloses an optimal island partition calculation method involving a distributed power-supply power distribution network. The method includes the step that under a distributed power generation condition, a power distribution network model is simplified and constructed, wherein during construction of the model, an original power distribution network involving DG is converted into a connected graph the borders of which have weights, the weights of the borders are determined by the power of connected loads and the significance of the loads and can be obtained by means of a multi-index quantitative evaluation method, the higher the significance is, the smaller the obtained weights will be, and the priorities of the corresponding loads are higher. The method has the advantages that an improved dynamic planning algorithm is provided for conducting island partition solution, a reasonable planning island scheme can be accurately and quickly calculated, the purpose is to achieve the maximum power recover, the significance of the loads is comprehensively taken into account, the solution speed of problems can be effectively increased, the solution precision of the problems can be effectively improved, and an important scientific basis can be offered to dynamic planning of the power distribution network.

Description

technical field [0001] The invention relates to the field of power grid operation and planning, in particular to a planning calculation method for island division of a distribution network with distributed power sources. Background technique [0002] With the gradual maturity of distributed generation (Distributed Generation, DG) technology, the DG that uses various renewable energy as primary energy in the distribution network is increasing year by year. With the continuous improvement of DG penetration rate, the operation mode and management of distribution network are also more complicated. The current DG grid-connected regulations do not allow island operation, and require that DG must withdraw quickly when a fault or disturbance occurs, resulting in the limitation of DG's contribution to the distribution network. in clean power generation. However, the advantages of DG in terms of power generation flexibility have not been fully utilized. The island division scheme and...

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Problems solved by technology

With the continuous improvement of DG penetration rate, the operation mode and management of distribution network are also more complicated. The current DG grid-connected regulations do not allow island operation, and require that DG must withdraw quickly when a fault or disturbance occurs, resulting in the limitation of DG's contribution to the distribution network. in clean power generation

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