Distributed power supply access power distribution network planning method

Abstract

The present invention discloses a distributed power supply access power distribution network planning method. The method comprises: establishing the power distribution network extension planning model of a distributed power supply, wherein the power distribution network extension planning model is a mathematic model for the line operation cost, the distributed power supply construction cost and the purchasing electricity cost reduced through the reduction of the access of the distributed power supply, employing a genetic algorithm for solution, employing the adaptive genetic algorithm for planning of the distributed power supply, employing the genetic algorithm for extension planning of the network aiming at the individual of distributed power supply capacity and position generated by each generation in the genetic algorithm, adding the influence of the distributed power supply, and repairing non-feasible solution generated by the intersection and mutation operation in the genetic algorithm, and performing economic evaluation of the integrated planning result of the distributed power supply and the network. According to the actual condition of the distribution network structure and the capacity and the distribution position of the distributed power supply, and the problems of the planning of the distribution network, the site selection and the constant volume of the transformer station and the site selection of the distributed power supply are solved through adoption of the appropriate algorithm.

Description

technical field

[0001] The invention relates to the field of new energy and distribution network planning, in particular to a planning method for distributed power generation (DG) accessing a distribution network. Background technique

[0002] In recent years, new energy power generation dominated by wind power and photovoltaics has developed rapidly. Vigorously developing wind power and photovoltaics will help reduce fossil fuel consumption and reduce carbon emissions. Photovoltaic power stations and wind farms in the distribution network are generally connected in the form of distributed power sources. Because the wind speed and light are greatly affected by the weather, the output of wind farms and photovoltaic power stations is random, so the traditional distribution network planning method cannot Fully adapt to the grid-connected situation of distributed power. When a large number of distributed power sources appear in the planning scheme, a large number of random cha...

Examples

Embodiment Construction

[0014] Concrete steps of the method of the present invention: First, determine the type, capacity and location of the distributed power supply according to the distribution of natural resources and the country's energy policy. Power supply, that is, only consider environmental and policy factors; then, combined with the actual grid connected to the distributed power supply, the distributed power supply is modeled from a technical point of view, and the genetic algorithm is used to plan the optimal capacity and DG location.

[0015] Step 1: Establish a distributed power distribution network expansion planning model: For the existing distribution network, considering the growth of its load, without changing the network structure, through a reasonable access to distributed power, it can meet The demand for load growth, this is the layout planning of distributed power. The present invention assumes that the load demand increases at a rate of 1% per year, and at the same time assum...

technical field

[0001] The invention relates to the field of new energy and distribution network planning, in particular to a planning method for distributed power generation (DG) accessing a distribution network. Background technique

[0002] In recent years, new energy power generation dominated by wind power and photovoltaics has developed rapidly. Vigorously developing wind power and photovoltaics will help reduce fossil fuel consumption and reduce carbon emissions. Photovoltaic power stations and wind farms in the distribution network are generally connected in the form of distributed power sources. Because the wind speed and light are greatly affected by the weather, the output of wind farms and photovoltaic power stations is random, so the traditional distribution network planning method cannot Fully adapt to the grid-connected situation of distributed power. When a large number of distributed power sources appear in the planning scheme, a large number of random cha...

Examples

Embodiment Construction

[0014] Concrete steps of the method of the present invention: First, determine the type, capacity and location of the distributed power supply according to the distribution of natural resources and the country's energy policy. Power supply, that is, only consider environmental and policy factors; then, combined with the actual grid connected to the distributed power supply, the distributed power supply is modeled from a technical point of view, and the genetic algorithm is used to plan the optimal capacity and DG location.

[0015] Step 1: Establish a distributed power distribution network expansion planning model: For the existing distribution network, considering the growth of its load, without changing the network structure, through a reasonable access to distributed power, it can meet The demand for load growth, this is the layout planning of distributed power. The present invention assumes that the load demand increases at a rate of 1% per year, and at the same time assum...

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