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NSGA2-based power distribution network voltage two-stage optimization algorithm

An optimization algorithm and technology of distribution network, applied in the direction of AC network voltage adjustment, calculation, genetic model, etc., can solve the problem of voltage optimization algorithm prone to premature and other problems

Pending Publication Date: 2020-04-21
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] This application provides a two-stage distribution network voltage optimization algorithm based on NSGA2 to solve the technical problem that the distribution network voltage optimization algorithm tends to be premature or converge to a local optimum

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  • NSGA2-based power distribution network voltage two-stage optimization algorithm
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  • NSGA2-based power distribution network voltage two-stage optimization algorithm

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Embodiment Construction

[0047] In order to enable those skilled in the art to better understand the technical solutions in the application, the following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Obviously, the described The embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.

[0048] The embodiment of the application provides a two-stage optimization algorithm for voltage distribution network voltage based on NSGA2, including:

[0049] Read power grid component parameters, loads and distributed power data, determine the objective function and constraint conditions.

[0050] The objective function includes: the lowest total daily ac...

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Abstract

The invention discloses an NSGA2-based power distribution network voltage two-stage optimization algorithm. The algorithm comprises the steps that: power grid element parameters, loads and distributedpower supply data are read, objective functions and constraint conditions are determined; with minimum daily transmission loss and minimum voltage deviation taken as a one-stage objective function, an improved NSGA2 algorithm is adopted for solving , so that the daily action combinations of multiple groups of voltage regulators and capacitor banks are solved; with the Pareto solution set adoptedas an optimization space, the minimum number of equipment actions as an objective function, and on the basis of the one-stage objective function, and a fuzzy decision algorithm is adopted for solving,so that an optimal compromise solution can be obtained. According to the algorithm, a two-stage power distribution network voltage optimization model is established for an active power distribution network containing distributed power supplies with daily load curves and photovoltaic power generation daily curves considered, so that the technical problem that a voltage optimization algorithm of the power distribution network is easy to premature or converge to a local optimal point is solved. The algorithm has the advantages of simplicity, high reliability and capability of saving investment.

Description

Technical field [0001] This application relates to the technical field of power system voltage optimization, and in particular to a two-stage optimization algorithm for distribution network voltage based on NSGA2. Background technique [0002] Voltage is one of the basic indicators to measure power quality, and it is a sign that reflects the balance and reasonable distribution of reactive power in the power system. Unqualified voltage can cause serious harm to the power grid. At present, it has become an inevitable trend for distributed power sources to be connected to the grid with high penetration. In addition, the domestic main transformer has a weak load regulation function. The forced reactive power compensation and voltage regulation cannot solve the voltage limit problem well. Therefore, in-depth study of active distribution Grid voltage optimization to reduce grid loss and improve grid power quality is of great significance. [0003] At present, there are two main categori...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12G06N3/12G06Q10/04G06Q50/06
CPCH02J3/12G06Q10/04G06Q50/06G06N3/126Y04S10/50Y02E40/70
Inventor 王洪林明立李维王科刘红文徐肖伟聂鼎
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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