Reconstruction method for power distribution network with distributed power supply after serious fault

A technology for distributed power supply and distribution network failure, applied in electrical components, circuit devices, AC network circuits, etc. question

Inactive Publication Date: 2020-10-23
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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However, these methods have high computational complexity and cannot meet the real-time requirements for rapid reco...

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  • Reconstruction method for power distribution network with distributed power supply after serious fault
  • Reconstruction method for power distribution network with distributed power supply after serious fault
  • Reconstruction method for power distribution network with distributed power supply after serious fault

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Embodiment

[0100] A reconstruction method after a serious failure of a distributed power distribution network, the analysis steps include:

[0101] Step 1. In this embodiment, the IEEE 69 node standard calculation example is used for analysis. The simulation software is matlab, and the system topology is as follows: Figure 4 As shown, the entire distribution network consists of 68 branches and 5 contact switches, with a total active load of 3802.19kW, a reactive load of 2694.60kvar, and a rated voltage of 12.66kV.

[0102] Step 2, connect distributed power sources with capacities of 160kW, 60kW, 200kW, 150kW, 30kW, 130kW and 200kW at node 37, node 45, node 6, node 17, node 24, node 60 and node 32 respectively (the numbers are respectively are DG1, DG2, ..., DG7), assuming that a serious fault suddenly occurs at node 6 during the normal operation of the distribution network.

[0103] Step 3. After a failure, considering the operating characteristics of distributed power sources and the...

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Abstract

The invention belongs to the technical field of power system power distribution network planning and operation, and particularly relates to a reconstruction method for a power distribution network with a distributed power supply after serious fault. The method for reconstructing the power distribution network with the distributed power supply after serious fault is suitable for rapid reconstruction of the power distribution network with the distributed power supply after the serious fault, and is convenient to model, high in simulation precision, high in calculation efficiency and strong in expansibility. The method comprises the following steps: 1, establishing an objective function and constraint condition model of a reconstruction problem after the power distribution network has the fault; 2, performing modeling analysis on the distributed power supply when power distribution network fault occurs; 3, adopting a spanning tree model based on the graph theory to solve an optimal methodof island division; 4, completing the weight dynamic division of a multi-objective function through a membership function, and normalizing a power distribution network reconstruction multi-objectiveoptimization problem into a single-objective optimization problem; and 5, solving the reconstruction optimization problem based on an empire competition algorithm to obtain an optimal reconstruction strategy after the serious fault of the power distribution network.

Description

technical field [0001] The invention belongs to the technical field of power system distribution network planning and operation, and in particular relates to a reconstruction method after a serious failure of a distribution network containing distributed power sources. Background technique [0002] At present, the new smart distribution network has the ability to actively manage a large number of distributed energy sources. It can independently coordinate and control intermittent new energy and energy storage devices, actively consume renewable energy and ensure the safe and economic operation of the network. However, when the distribution network encounters serious faults, the operator may not be able to take timely and accurate countermeasures, resulting in the continuous expansion of the scale of the accident, and eventually the entire distribution network collapses and blackouts occur. At this time, it is necessary to quickly recover and reconstruct the distribution net...

Claims

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Application Information

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IPC IPC(8): H02J3/38G06Q10/04G06Q50/06G06N3/00
CPCH02J3/388G06Q10/04G06Q50/06G06N3/006H02J2203/20Y04S10/50
Inventor 张谦刘新元郑惠萍白杨宋述勇王金浩王小昂薄利明郝捷张一帆王玮茹暴悦爽陈丹阳郝鑫杰
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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