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Three-phase load imbalance automatic adjusting method of power distribution network

A load unbalanced and automatic adjustment technology, applied in the direction of multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, circuit devices, etc., can solve problems such as easy harmonics, high price, and application restrictions

Inactive Publication Date: 2017-06-20
WUHAN UNIV
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  • Abstract
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  • 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 load imbalance automatic adjusting method of power distribution network
  • Three-phase load imbalance automatic adjusting method of power distribution network
  • Three-phase load imbalance automatic adjusting method of power distribution network

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Embodiment Construction

[0053] The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0054] see figure 1 , the embodiment of the present invention provides an economical three-phase load unbalanced automatic regulator device, including a commutation switch module (such as figure 1 Middle M) and central control area modules (such as figure 1 Middle N), the phase-change switch module is connected to the central control area module, the three-phase current input terminal of the phase-change switch module is connected to the three-phase line, and the three-phase current output terminal of the phase-change switch module is connected to the user. During specific implementation, according to specific load line conditions, a phase change switch module can be installed on each load branch in the distribution network, and all phase change switch modules are collectively connected to the central control area module.

[0055] The c...

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Abstract

The invention provides a three-phase load imbalance automatic adjusting method of a power distribution network. A phase change switch module and a central control region module are arranged. The central control region module comprises a control module and a carrier wave module. The phase change switch module comprises an electric power electronic switch unit and a phase selection switch controller unit. The three-phase load imbalance automatic adjusting process comprises steps of acquiring three-phase current data into the central control region module; calculating imbalance degree; adopting the genetic algorithm during over-limit; coding a vector gene for a three-phase switch switching state corresponding to each load branch; obtaining an optimal phase change control instruction according to corresponding target function of the phase change module; transmitting the optimal phase change instruction to a phase selection switch controller unit of a phase change switch module on each load branch through the carrier wave module; and controlling the electric power electronic switch unit to finish the phase change operation. According to the invention, the method is used for supporting automatic detection during operation of an electric power system, so large quantity of manpower and materials are saved, device safety is improved and power supply reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and relates to a three-phase load unbalance automatic adjustment method for controlling the dynamic load unbalance of distribution network. Background technique [0002] With the development of industry, unbalanced nonlinear loads, single-phase user electricity consumption is also increasing day by day. However, this power consumption method will greatly lead to unbalanced three-phase loads, increase line loss, affect power quality, and reduce user terminal voltage. Therefore, research on the adjustment of three-phase load imbalance has already been carried out at home and abroad. [0003] At present, there are mainly three-phase current unbalance treatment measures: (1) The method of manual regulation is adopted. Operation and maintenance personnel regularly monitor and control at any time. Once the unbalanced three-phase load is found, manually change the phase according to th...

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 倪周袁佳歆蒋紫薇
Owner WUHAN UNIV
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