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Station area grid theoretical line loss calculation method giving consideration to line impedance and load uncertainty based on fuzzy flow algorithm

A technology of line impedance and theoretical line loss, applied to AC network circuits, AC networks with the same frequency from different sources, electrical components, etc., can solve problems such as not considering the influence of line impedance uncertainty

Active Publication Date: 2017-08-11
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0005] To sum up, the existing theoretical line loss calculation methods for power grids in the station area do not consider the influence of line impedance uncertainty on line loss

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  • Station area grid theoretical line loss calculation method giving consideration to line impedance and load uncertainty based on fuzzy flow algorithm
  • Station area grid theoretical line loss calculation method giving consideration to line impedance and load uncertainty based on fuzzy flow algorithm
  • Station area grid theoretical line loss calculation method giving consideration to line impedance and load uncertainty based on fuzzy flow algorithm

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[0144] The present invention will be further described below in conjunction with the examples, but it should not be understood that the scope of the subject of the present invention is limited to the following examples. Without departing from the above-mentioned technical ideas of the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the protection scope of the present invention.

[0145] as attached Figure 5 As shown, taking the IEEE4-node system as an example, a theoretical line loss calculation method of the power grid in the station area based on the fuzzy power flow algorithm considering the line impedance and load uncertainty. The specific steps are as follows:

[0146] (1) Input basic data and initialization

[0147] 1.1 Enter basic data

[0148] First, input basic data such as network structure, impedance membership degree information, and load membership degree ...

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Abstract

The invention discloses a station area grid theoretical line loss calculation method giving consideration to line impedance and load uncertainty based on a fuzzy flow algorithm, and the method comprises the steps: firstly inputting a network structure, impedance membership degree information and load membership degree information, and carrying out the parameter initialization; secondly solving the value range of each fuzzy variable at a membership degree of zero through an alpha-cut set method; thirdly solving the maximum value of network loss in the value range through a genetic algorithm; fourthly solving the minimum value of network loss in the value range; fifthly substituting the value of the variable at the membership degree of one, and calculating the corresponding network power loss through a three-phase flow algorithm; finally obtaining the possibility distribution of network loss through the solved maximum and minimum values of network loss at all membership degrees.

Description

technical field [0001] The invention belongs to the technical field of power system steady-state power flow calculation, and in particular relates to a theoretical line loss of a power grid in a station area based on a fuzzy power flow algorithm considering the uncertainty of line impedance and load power. Background technique [0002] Line loss rate, as an important technical and economic index of power grid companies, is an important content to measure the comprehensive management level and economic benefits of power grid companies. According to data, at present, more than 50% of the power grid loss in my country comes from the distribution network. Therefore, the line loss management and loss reduction work of the distribution network is of great significance for improving the economic operation level of the entire power grid. In the actual power grid, the line loss refers to the difference between the power supply and the electricity seen by all users (that is, the total...

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Application Information

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IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06H02J2203/20
Inventor 赵霞刘璐罗兰王宁胡潇云李真
Owner STATE GRID CORP OF CHINA
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