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Coordinated planning method for flexible multi-state switch and distributed generation in active distribution network

A distributed power, multi-state technology, applied to AC networks, electrical components, circuit devices, etc. of the same frequency with different sources, can solve the problems of long convergence time, no direction of genetic operation, no memory of individuals, etc.

Active Publication Date: 2019-08-20
HEFEI UNIV OF TECH
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AI Technical Summary

Problems solved by technology

The genetic algorithm has a diverse population and is suitable for global search, but the individual has no memory, the genetic operation is blind and directionless, and the required convergence time is long

Method used

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  • Coordinated planning method for flexible multi-state switch and distributed generation in active distribution network
  • Coordinated planning method for flexible multi-state switch and distributed generation in active distribution network
  • Coordinated planning method for flexible multi-state switch and distributed generation in active distribution network

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Embodiment Construction

[0093] In this example, if figure 1 As shown, the flexible multi-state switch is connected to the active distribution network with distributed power; a coordinated planning method between the flexible multi-state switch and the distributed power in the active distribution network is carried out as follows:

[0094] Step 1. Establish the equivalent model of the flexible multi-state switch:

[0095] The flexible multi-state switch with M ports is equivalent to M power sources and M branches and connected to the active distribution network, and an impedance is introduced in each branch, so that the capacity of the flexible multi-state switch can be used to support The capacity of the circuit is expressed, and the loss of the flexible multi-state switch is approximately replaced by the branch loss; since the flexible multi-state switch only has active power loss, the branch reactance is not considered, and the branch resistance is determined by formula (1).

[0096] In the establ...

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Abstract

The invention discloses a coordinated planning method for a flexible multi-state switch and distributed generation in an active distribution network, which comprises the steps of 1, establishing an equivalent model of the flexible multi-state switch; 2, establishing an optimal power flow calculation model of the distribution network based on the flexible multi-state switch; 3, establishing a jointlocating and sizing model of the flexible multi-state switch and the distributed generation in the active distribution network; and 4, solving the joint locating and sizing model of the flexible multi-state switch and the distributed generation for accessing to the distribution network by adopting an improved genetic particle swarm hybrid optimization algorithm. According to the invention, the location and capacity of the flexible multi-state switch and the distributed generation for accessing to the distribution network can be planned scientifically and reasonably, adverse effects brought about by grid connection of the distributed generation are reduced by applying the power flow optimization ability of the flexible multi-state switch, the network loss of the active distribution networkis reduced, the voltage level is improved, and the operation potential of the active distribution network is improved.

Description

technical field [0001] The invention relates to the technical field of distribution network planning, in particular to a coordinated planning method for flexible multi-state switches and distributed power sources in an active distribution network. Background technique [0002] The grid connection of a high proportion of renewable distributed power generation changes the distribution of power flow in the system and has a huge impact on the planning and operation of the distribution network. The degree of influence is related to the installation location and capacity configuration of distributed power generation. With the gradual increase of the penetration rate of distributed power, the traditional distributed power planning has shown obvious shortcomings, and the emergence of flexible multi-state switches has brought an opportunity to solve this problem. The function of the flexible multi-state switch is realized based on fully controlled power electronic devices. Compared w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06H02J2310/64H02J2203/20
Inventor 张国荣罗柳
Owner HEFEI UNIV OF TECH
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