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Method for three-phase imbalance load distribution suitable for low-voltage distribution network

A low-voltage distribution network and distribution method technology, applied in the direction of eliminating/reducing asymmetry in multi-phase networks, reducing asymmetry in multi-phase networks, etc., can solve problems such as three-phase imbalance in low-voltage distribution networks, and achieve reduction of asymmetry The effect of balance

Active Publication Date: 2014-01-29
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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Problems solved by technology

[0004] The purpose of the present invention is, in order to solve the three-phase unbalanced problem of the low-voltage distribution network, the present invention discloses a three-phase unbalanced load distribution method suitable for the low-voltage distribution network

Method used

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  • Method for three-phase imbalance load distribution suitable for low-voltage distribution network
  • Method for three-phase imbalance load distribution suitable for low-voltage distribution network
  • Method for three-phase imbalance load distribution suitable for low-voltage distribution network

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Embodiment Construction

[0036] The specific implementation mode of the present invention is according to figure 1 Flow chart of three-phase unbalanced load distribution in low-voltage distribution network.

[0037] In this example, there are 20 users in the low-voltage distribution network. The load curves are shown in Table 1, and the corresponding relationship between users and load clusters is shown in Table 2. After the fuzzy C-means clustering (FCM) algorithm, three types of clustering curves are formed, as shown in Table 1. figure 2 . According to the clustering results, determine the target constraint of the least commutation times and total times in the continuous time of the user, and obtain the user allocation commutation operation table through the optimal algorithm, as shown in Table 3, and the load curve in the low-voltage distribution network before and after the load distribution commutation is as follows image 3 and Figure 4 .

[0038] Table 1 Load curve

[0039]

[0040] Ta...

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Abstract

The invention discloses a method for three-phase imbalance load distribution suitable for a low-voltage distribution network. The method comprises the steps that according to the phenomenon of three-phase imbalance load often occurring in the low-voltage distribution network, electrical load data of users are extracted and the FCM arithmetic is used for conducting clustering analysis on user load features; according to a classification result, the users of different types are distributed in the low-pressure distribution network through the optimal algorithm, so that the three-phase imbalance of the low-voltage distribution network is restrained, and therefore the purposes that the consumption of the low-voltage distribution network is reduced and the reliability of the low-voltage distribution network is improved are achieved. Pattern classification is conducted on the user loads according to a daily load curve or a monthly load curve of each user and the best power grid connection phase sequence mode is searched for according to the user loads belonging to the same load pattern through the optimization algorithm, so that local classification and time sharing balance of a load side is achieved, and therefore the imbalance degree of the distribution network is reduced to the greatest extent from a source. The method is suitable for three-phase imbalance load distribution of the low-voltage distribution network.

Description

technical field [0001] The invention relates to a three-phase unbalanced load distribution method suitable for a low-voltage power distribution network, which belongs to the technical field of low-voltage power distribution. Background technique [0002] The low-voltage distribution network has the characteristics of a large number and a wide range. The low-voltage user load is mostly single-phase, and the power consumption behavior is random due to seasonal influences. Therefore, the three-phase imbalance of the low-voltage distribution network load is very prominent. The low-voltage distribution network The harm caused by the three-phase imbalance of the network load is mainly reflected in the increase of the loss of the distribution transformer and the line, affecting the normal operation of the electrical equipment, reducing the output of the distribution transformer and reducing the reliability of the power supply of the low-voltage distribution network. [0003] Aiming...

Claims

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Application Information

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IPC IPC(8): H02J3/26
CPCY02E40/50
Inventor 潘本仁邓才波徐在德
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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