Vector calculation method of electrical load center of construction engineering and design method of substation

Abstract

The present invention provides a vector calculation method of electrical load center in construction engineering, which uses the minimum load moment method to quantitatively calculate the electrical load center, and obtains the optimal theoretical position of the substation, specifically including (1) setting the calculation premise of the calculation method: Electrical lines are laid according to three axes; (2) For an incompletely balanced system, according to the coordinate points (x, y, z) of the optimal load center under the latitude and longitude column network, they will respectively fall on the axes corresponding to some loads. The law on the coordinate points, except for a completely balanced system, decompose a group of loads into the coordinate system of the three axes, find a point, and the sum of the load moments of all loads on this point is the smallest, thus obtaining this One point is the optimal load center of the system, and its coordinate point corresponds to the optimal theoretical position of the substation. It also discloses the substation design method based on this method, determines the scientific power supply area and load capacity of the substation, overcomes the problems of excessive capacity of the substation, excessive capacity of a single unit, excessive concentration of the system, and loss of energy consumption. Combined with the load distribution state, a system power supply idea of ​​multiple small-capacity substations is formed.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a method for calculating a vector of an electrical load center and a method for determining the number and location of substations according to the calculation method. Background technique [0002] The substation design belongs to the electrical system design, and its purpose is to establish a suitable electrical system through load analysis, find out the minimum total load moment of the system, in order to achieve the purpose of energy saving. Usually, the substation is set in the load center, which can reduce the distribution loss and minimize the line voltage drop, that is, the electrical energy efficiency is the highest. The previous substation design has the following shortcomings: [0003] (1) For the load center, it is only a qualitative analysis, and there is no quantitative calculation; [0004] (2) Even if a rough quantitative calculation exists, the ac...

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Problems solved by technology

[0033] The technical problem to be solved by the present invention is to provide a construction engineering electrical load center vector calculation method and a substation design method based on the method for the above-mentioned deficiencies in the prior art. The construction engineering electrical load used in the design method The vector calculation method of the center is calculated according to the minimum load moment of the system. Through the comparison of the unit load distance of the substation, the scientific power supply area and load capacity of the substation are determined, which overcomes the current excessive capacity of the substation and the single capacity of the transformer. If the system is too large, the system will be too concentrated, resulting in the loss of energy consumption. Combined with the load distribution state, a system power supply idea of ​​multiple small-capacity substations will be formed.

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