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Regional distributed generator (DG) maximum penetration level calculation method based on genetic algorithm

A technology of distributed power and genetic algorithm, applied in the field of new energy grid connection of power system, can solve the important factors of site selection such as insufficient consideration of construction difficulty, only consider construction cost and network loss cost, and reduce the utilization rate of distributed power, etc. problem, to achieve the effect of short time-consuming, maintaining diversity, and meeting the needs of real-time control

Inactive Publication Date: 2017-12-05
NARI TECH CO LTD +4
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Problems solved by technology

However, with a large number of distributed power grids connected to the grid and the proportion of distributed power generation gradually increasing, the capacity of distributed power connected to the grid should be a growing trend. The power grid brings good benefits. With the construction of the power grid in the later stage, the utilization rate of distributed power will be greatly reduced
Moreover, the optimal access position of the distributed power source obtained according to the patent only considers the construction cost and the network loss cost, and does not fully consider the important factors of site selection such as the access position environment and construction difficulty, and lacks certain practicability

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  • Regional distributed generator (DG) maximum penetration level calculation method based on genetic algorithm
  • Regional distributed generator (DG) maximum penetration level calculation method based on genetic algorithm
  • Regional distributed generator (DG) maximum penetration level calculation method based on genetic algorithm

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Embodiment Construction

[0058] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the protection scope of the present invention.

[0059] The following is an example analysis of the calculation method of the maximum admission capacity of 40 nodes in the distribution network containing DG. Node 0 is connected to the system power supply, and the system reference capacity is S B Take 15MVA, the reference voltage U B Take 23kV. DG is connected at nodes 6, 27, 38, and 39, among which the DG type of nodes 6 and 38 is wind power, and the DG type of nodes 27 and 39 is photovoltaic. combine figure 1 The flow chart of the method, using MATLAB to write the calculation program of the maximum admission capacity including DG. A typical method for calculating the admission capacity of distributed power in a region ba...

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Abstract

The invention discloses a regional distributed generator (DG) maximum penetration level calculation method based on a genetic algorithm. The method comprises particular steps: (1) the access type, the number and the access nodes of DGs in a distribution network are determined, and according to historical data of wind power generation and photovoltaic power generation in the region, the maximum output of the DG in each time period in typical days is determined; (2) an objective function for the maximum accessible capacity for DG access and operation constraint conditions are determined, and the constraint conditions comprise equality constraints and inequality constraints; (3) in each time period, the initial access capacity for each node DG is generated through the genetic algorithm; (4) time sequence power flow optimization calculation based on the genetic algorithm is carried out on the access combination; and (5) according to the objective function, the optimal DG access capacity of each access point is determined. The maximum penetration level problem of different types of DGs in conditions of any number and any access position can be solved, and a basis is provided for maximum utilization of DG grid-connected power generation under safe operation conditions.

Description

technical field [0001] The present invention relates to the technical field of grid-connected new energy sources in power systems, and more specifically, to a typical method for calculating the access capacity of distributed power sources in a certain area based on genetic algorithms. Background technique [0002] The proportion of active power loss in the transmission process of power distribution network is higher than that of power transmission network. Therefore, reducing the active power loss of distribution network and saving power is an important issue faced by many power practitioners. With the improvement of distributed power generation technology, connecting distributed power generation in the distribution network has become an important measure for power grid peak regulation, reduction of network loss, and improvement of new energy utilization. Distributed power generation currently includes wind power generation, solar photovoltaic power generation, electric vehi...

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Application Information

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IPC IPC(8): H02J3/46H02J3/38H02J3/06G06N3/12
CPCG06N3/126H02J3/06H02J3/383H02J3/386H02J3/46H02J2203/20Y02E10/56Y02E10/76Y02E40/70Y04S10/50
Inventor 陈春吴琳鞠达赵景涛李哲付明宋金燕祝进贾玮范文余涛杜健薛雷
Owner NARI TECH CO LTD
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