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Power distribution network islanding method based on harmonic algorithm

A technology for distribution network and distribution network system, applied in computing, instrumentation, data processing applications, etc., can solve problems such as slow calculation speed, long time to solve the problem of island division, poor handling of discrete optimization problems, etc. The effect of realization, few adjustable parameters and simple principle

Active Publication Date: 2014-08-06
HUNAN UNIV +2
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Problems solved by technology

[0007] However, the above method does not handle discrete optimization problems well, the calculation speed is slow, it is easy to fall into local optimum, and it takes a long time to solve the island partition problem

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  • Power distribution network islanding method based on harmonic algorithm
  • Power distribution network islanding method based on harmonic algorithm
  • Power distribution network islanding method based on harmonic algorithm

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Embodiment Construction

[0048] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0049] The island division method of the distribution network based on the harmony algorithm in the present invention aims at recovering the maximum amount of load switching and the least number of action switches, and considers constraints such as active power balance in the island and no overload of line current, etc., for each distribution network in the distribution network Each node is coded 0-1, combined with the breadth-first search algorithm to obtain a specific island division scheme, and the objective function value of each island is calculated, and the island scheme is adjusted, evaluated, and updated using the harmony algorithm, and then the current optimal solution The power flow test is carried out, and finally a better island division scheme is given.

[0050] see figure 1 As shown, it is a...

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Abstract

The invention relates to a power distribution network islanding method based on a harmonic algorithm. Aiming for largest recovered load switching value and smallest motion switching value, and considering constraint conditions such as active power balance and non-overload of line current in an island, the power distribution network islanding method based on the harmonic algorithm provided by the invention carries out 0-1 encoding for each node in the power distribution network, obtains a specific islanding scheme in combination with a breadth-first search algorithm, calculates an objective function value of each island, adjusts, evaluates and updates the islanding scheme by utilizing the harmonic algorithm, then carries out trend inspection on the current optimal solution, and finally gives a better islanding scheme. The method for realizing full search of a solution space to solve the power distribution network islanding problem based on the harmonic algorithm provided by the invention can utilize individual local information and group global information guidance algorithm for further search, is simple in principle and few in adjustable parameters, and can obtain the optimal islanding scheme in a relatively short period of time when the islanding problem is solved.

Description

technical field [0001] The invention relates to a distribution network island analysis method, in particular to a distribution network island division method based on harmony algorithm. Background technique [0002] The isolated operation of the distribution network is an abnormal operation mode after the distribution network is connected to the distributed generation (DG). The island division of distribution network is to delist the distribution network into one or Several isolated subnets are used to ensure the power supply of loads, especially critical loads, until the fault is eliminated and the system resumes power supply. In this mode of operation, some users of the power distribution system are only powered by DG, and the system including these users and DG is called an island in the power distribution system. [0003] According to the relevant regulations of IEEE std.999-2000, after the power distribution system is out of service due to a fault, all DGs in the dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
Inventor 汪沨曾业运陈春曹一家黄纯董旭柱黄小耘许爱东于力彭飞进雷金勇
Owner HUNAN UNIV
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