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Three-phase imbalance regulation method capable of reducing network loss

A technology for balance adjustment and network loss, which is applied in the direction of eliminating/reducing asymmetry in multi-phase networks, reducing asymmetry in AC network circuits, and multi-phase networks. It can solve problems such as easy harmonics, high price, and application restrictions.

Inactive Publication Date: 2017-06-13
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high price and the disadvantages of harmonics, the application is greatly limited.

Method used

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  • Three-phase imbalance regulation method capable of reducing network loss
  • Three-phase imbalance regulation method capable of reducing network loss
  • Three-phase imbalance regulation method capable of reducing network loss

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Embodiment Construction

[0056] The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0057] According to the fact that when the load is connected to the distribution network through the commutation switch, the positions of the connection points are different, and the losses generated are different. It is proposed that the minimum loss and the optimal commutation operation should be fully considered when adjusting the three-phase unbalance, taking into account both aspects , get the optimal commutation solution, form the corresponding commutation operation command, complete the commutation operation through the switch, and improve the three-phase imbalance problem.

[0058] Furthermore, the present invention proposes: when performing three-phase unbalance adjustment, fully consider the different losses generated by loads at different access points of the distribution network, not only considering the improvement of the thre...

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Abstract

The invention discloses a three-phase imbalance regulation method capable of reducing a network loss. The three-phase imbalance regulation method is characterized in that integrated minimum loss and optimal commutation operation are provided for three-phase imbalance regulation through considering the influence of three-phase imbalance on the network loss, the influence of a single-phase load on the network loss and the influence of a line loss on imbalance degree. The invention further provides an implementation method. Commutation switch modules and a central control area module are arranged; the commutation switch modules are arranged on various load branches in a power distribution network; all commutation switch modules are intensively connected to the central control area module; and three phases of current input ends of the commutation switch modules are connected with three phases of lines and three phases of current output ends of the commutation switch modules are connected with a user. The three-phase imbalance regulation method is used for supporting automatic detection while a power system runs, so that a lot of manpower and material resources are saved and the security of equipment and the power supply reliability are improved.

Description

technical field [0001] The invention belongs to the technical field of power systems, and relates to a three-phase unbalance adjustment method for reducing network loss. Background technique [0002] When the power system is running, the unbalanced three-phase load of the low-voltage distribution network is a long-term objective problem. The low-voltage distribution network usually adopts a three-phase four-wire power supply mode, and most users are single-phase loads or mixed single-phase and three-phase loads. Whether it is the residential quarters and office buildings of the urban distribution network, or the lighting, water pumps, motors and other loads of the rural network, they all show a large dispersion of time-space characteristics of electricity consumption. The unbalanced three-phase load of the low-voltage distribution network will lead to increased line loss and "low voltage" at the end. And with the large-scale access of distributed new energy, especially the...

Claims

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Application Information

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IPC IPC(8): H02J3/26
CPCH02J3/26H02J2203/20Y02E40/50
Inventor 蒋紫薇袁佳歆倪周
Owner WUHAN UNIV
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