Distribution network zoning power supply restoration strategy optimization method based on a fully distributed algorithm

A distributed algorithm and power supply recovery technology, applied in the field of power grids, can solve the problems of difficult generation of decision-making schemes, the stability needs to be improved, and the self-healing ability of the distribution network is weakened, so as to achieve the effect of improving work efficiency.

Active Publication Date: 2018-12-14
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional centralized control strategy is still used in the analysis and decision-making of global information. When there is a power supply problem in the control center, it will be difficult to generate a decision-making plan, which greatly weakens the self-healing ability of the distribution network.
The reason is that the control method of decentralized information collection-centralized optimization processing fails to realize fully distributed control in the true sense, so the stability of this method needs to be improved.

Method used

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  • Distribution network zoning power supply restoration strategy optimization method based on a fully distributed algorithm
  • Distribution network zoning power supply restoration strategy optimization method based on a fully distributed algorithm
  • Distribution network zoning power supply restoration strategy optimization method based on a fully distributed algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Take the improved IEEE37 node power distribution system as an example to simulate. IEEE37 node distribution grid topology such as figure 2 shown. Three distributed power sources are connected to the power distribution system, which are respectively connected to No. 710, No. 720 and No. 744 nodes, and all have the ability to maintain the independent operation of the island. The output of each distributed power source is shown in Table 1. The node load parameters are shown in Table 2.

[0089] Table 1 Distributed power parameters table

[0090]

[0091] Table 2 Load parameter table

[0092]

[0093]

[0094] Assuming that a three-phase ground fault occurs on line 799-701, bus 799 and line 799-701 are cut off, the downstream area is disconnected from the upper-level power grid, and the distribution network adopts the island operation mode and is powered by distributed power sources.

[0095] The consistency of the load recovery income is an important part of ...

Embodiment 2

[0100] In order to verify the effectiveness of the distributed algorithm proposed in the present invention, the genetic algorithm and the mathematical programming method widely used in the existing centralized algorithm research are respectively used to solve the recovery scheme. When using the genetic algorithm to solve, the relevant parameters are set as: population number N=20, chromosome length L=3, crossover probability a=0.8, mutation probability b=0.01, the iteration times are 1000 generations and 2000 generations, and 20 groups are carried out respectively. Simulation experiments, take the optimal solution. When using the mathematical programming method to solve the problem, the distribution network restoration model is modeled as a mixed integer programming model, and the commercial software CPLEX is called to solve it. The text compares and analyzes the results obtained by the three algorithms, as shown in Table 3.

[0101] Table 3 Comparison example table

[0102]...

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Abstract

The invention discloses a distribution network zoning power supply restoration strategy optimization method based on a fully distributed algorithm, which takes the load operation state as a decision variable to divide the non-fault power loss area into islands according to the optimization objective of maximizing the profit amount in the distribution network restoration process, thereby reducing the power outage range of the distribution network. The invention can solve the distribution network restoration decision problem when the power supply problem occurs in the control center by utilizingthe fully distributed algorithm, provides power supply to as many important loads as possible on the basis of ensuring the safe operation of the distribution network, and improves the self-healing ability of the distribution network under the condition of the main network fault.

Description

technical field [0001] The invention belongs to the technical field of power grids, in particular to a method for optimizing the recovery strategy of power distribution network partitioned power supply based on a fully distributed algorithm. Background technique [0002] In recent years, there have been many large-scale power outages at home and abroad, which have caused huge economic losses and profound social impacts, and also sounded the alarm for the safe and stable operation of the power system. As the end of the power system, the distribution network is directly connected to the users. When a power failure occurs, it will cause serious economic losses and social impacts. The emergence of distributed power sources and microgrids has enabled the distribution network to have the ability to heal itself. In the face of unavoidable failures, the active distribution network can effectively use various resources to flexibly respond to risks and maintain the highest possible op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/001H02J3/003H02J2203/20Y04S10/52
Inventor 蔡胜谢云云宋雯雯
Owner NANJING UNIV OF SCI & TECH
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