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Method for calculating power flow of power distribution networks

A technology for power flow calculation and distribution network, which is applied to circuit devices, AC network circuits, and AC networks with the same frequency from different sources. It can solve the problems of complex calculation process and slow convergence, and achieve simple programming and convergence speed. Fast, data-accurate results

Active Publication Date: 2017-05-31
CENT SOUTH UNIV
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Problems solved by technology

[0009] The invention provides a distribution network power flow calculation method with simple calculation method, fast processing speed and high result accuracy, so as to solve technical problems such as complicated calculation process and slow convergence existing in the traditional power flow calculation method

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  • Method for calculating power flow of power distribution networks
  • Method for calculating power flow of power distribution networks
  • Method for calculating power flow of power distribution networks

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Embodiment Construction

[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] see figure 1 As shown, the present invention provides a distribution network power flow calculation method, which includes the following steps:

[0024] S1. Number the branch nodes of the distribution network separately, obtain the impedance of each branch and the load of each node to form an m*4-dimensional node branch information matrix, and m is the number of branches in the distribution network ;

[0025] S2. Obtain the current of each node and the voltage of each node based on the progressive comparison method;

[0026] S3. Obtain the power of each node based on the current and voltage of each node obtained in step S2, and construct a power error matrix;

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Abstract

The invention provides a method for calculating power flow of power distribution networks. The method includes building node and branch information matrixes; carrying out current back-substitution updating and voltage push-forward updating on each node by the aid of progressive comparison processes; constructing error matrixes; comparing the error matrixes to convergence values to obtain power flow solution. The method has the advantages that parameters of the power distribution networks are known, and accordingly the node and branch information matrixes are easy to acquire; power of the various nodes does not need to be calculated in power flow calculation procedures on the basis of the progressive comparison processes, principles are simple as compared with Jacobian matrixes in Newton-Ralfson's methods, programming is easy to implement, the method is high in convergence speed and data accuracy, and precise power flow data can be provided for operation and maintenance staffs for the power distribution networks.

Description

technical field [0001] The invention relates to the technical field of power system analysis and calculation, and more specifically, relates to a power flow calculation method of a power distribution network. Background technique [0002] Power flow calculation is the most widely used, basic and important electrical calculation in power system. Its task is to calculate the power flow distribution of the entire network according to the given network structure and operating conditions. [0003] The results of power flow calculation are essential for both the analysis and research of the existing system operation mode, and the analysis and comparison of design schemes in the planning stage. Static and transient stability calculations of power systems also need to use the results of power flow calculations, which belong to the category of off-line calculations. [0004] With the establishment of a modern dispatching control center, in order to conduct real-time safety monitorin...

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Application Information

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IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 王春生王鹏胡玉坤刘子建粟梅孙尧
Owner CENT SOUTH UNIV
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