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Three-phase unbalanced treatment method based on linear programming

A linear programming and three-phase 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 slow progress of low-voltage line transformation, unbalanced three-phase, unbalanced load distribution, etc. , to avoid the combined explosion problem, reduce the three-phase unbalance degree, and shorten the calculation time

Active Publication Date: 2019-10-08
ZHEJIANG UNIV
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Problems solved by technology

[0002] With the development of social economy, the living standard of residents is improving day by day, and the load of users is also increasing. Since most of the household electricity consumption is single-phase load, it is easy to cause a very common three-phase imbalance problem during the peak period of electricity consumption. At the same time Due to the slow progress of low-voltage line transformation and the out-of-synchronization of meters and lines, the problem of three-phase imbalance is more serious
The three-phase imbalance will cause a series of adverse effects. Firstly, due to the unbalanced load distribution, the quality of the user's power supply will decline. Secondly, it will affect the normal operation of the power supply equipment and shorten the service life. In addition, it will cause many problems such as line loss.

Method used

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  • Three-phase unbalanced treatment method based on linear programming
  • Three-phase unbalanced treatment method based on linear programming
  • Three-phase unbalanced treatment method based on linear programming

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Embodiment Construction

[0047] In order to better understand the purpose, technical solution and technical effect of the present invention, the present invention will be further explained below in conjunction with the accompanying drawings.

[0048] refer to figure 1 , figure 1 Shown is a specific three-phase imbalance control method based on linear programming, including the following steps:

[0049] S10, constructing the objective function of three-phase imbalance control:

[0050]

[0051] In the formula: is the total current of phase X, X∈{A,B,C}.

[0052] S20, Construct the current equation constraints for three-phase unbalance control:

[0053]

[0054] In the formula: are the total currents of A, B, and C phases respectively; It is the 01 variable representing the phase of user i after governance, the variable of the phase to which the user belongs after governance takes 1, and the rest take 0; I i is the current of the i-th user, and N is the number of users.

[0055] S30, Co...

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Abstract

The invention relates to a three-phase unbalanced treatment method based on linear programming. The method comprises the steps that an objective function of three-phase unbalanced treatment is constructed; a current equation constraint of three-phase unbalanced treatment is constructed; a phase unique constraint of three-phase unbalanced treatment is constructed; a phase non-adjustable constraintof three-phase unbalanced treatment is constructed; a phase-integral non-separable constraint of three-phase unbalanced treatment is constructed; a maximum phase switching number constraint of three-phase unbalanced treatment is constructed; a three-phase unbalance treatment model based on linear programming is formed to acquire a three-phase unbalanced treatment plan. The method can provide support for power system operators to manage three-phase imbalances and reduce line losses.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a three-phase unbalance control method based on linear programming. Background technique [0002] With the development of social economy, the living standard of residents is improving day by day, and the user load is also increasing. Since most of the household electricity consumption is single-phase load, it is easy to cause a very common three-phase imbalance problem during the peak period of electricity consumption. At the same time The three-phase unbalance problem is more serious because of the slow progress of low-voltage line transformation and the out-of-synchronization of meters and lines. The three-phase imbalance will cause a series of adverse effects. Firstly, due to the unbalanced load distribution, the quality of power supply for users will decline. Secondly, it will affect the normal operation of power supply equipment and shorten the service life. In addition, it will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26
CPCH02J3/26H02J2203/20Y02E40/50
Inventor 林振智刘晟源林之岸崔雪原连子宽章博金伟超章天晗杨莉
Owner ZHEJIANG UNIV
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