Three-phase load balancing system of main and branch lines of distribution network

A three-phase load and balance system technology, applied in the direction of reducing the asymmetry of the polyphase network, eliminating/reducing the asymmetry of the polyphase network, etc., can solve the problems such as noise, the load characteristics are not considered, and the load device cannot run stably.

Active Publication Date: 2018-01-16
SHANDONG SHENGLI TONGHAI GRP DONGYING TIANLAN ENERGY SAVING SCI & TECH CO LTD
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Problems solved by technology

The technical solution disclosed in the above-mentioned Chinese patent application does not consider the load characteristics of the load device it supplies when selecting the commutation device. For example, if the load device has a built-in ma

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  • Three-phase load balancing system of main and branch lines of distribution network
  • Three-phase load balancing system of main and branch lines of distribution network
  • Three-phase load balancing system of main and branch lines of distribution network

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Embodiment Construction

[0021] In order to clarify the technical scheme and technical purpose of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific implementation methods.

[0022] A three-phase load balancing system for the main and branch lines of the distribution network in this embodiment, such as Figure 2-Figure 4 As shown, the load balancing system includes a main controller, a branch controller, a branch line load monitoring device, a main line load monitoring device and a phase commutation device arranged on each branch line to control the three-phase load balancing of the main and branch lines .

[0023] The main and branch lines of the distribution network, such as figure 2 , image 3 As shown, it includes a main line drawn from the low-voltage side of the distribution transformer and m branch lines, which are respectively branch line 1, branch line 2, ..., branch line m, m is an integer greater than 2...

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Abstract

The invention discloses a three-phase load balancing system of main and branch lines of a distribution network. The system is composed of a main controller and a plurality of branch controllers. The main controller determines a phase adjustment pair and a main adjustment value based on an unbalanced load situation of a main line and selects and adjusts branch lines among all branch lines based onthe phase adjustment pair. All branch controllers mark commutation devices that do not provide power for load devices with built-in magnetic motion parts at the source phases of the adjusted branch lines, needed commutation devices are selected among the marked commutation devices, and then if the marked commutation devices are not sufficient, commutation devices are selected from unmarked commutation devices; and the sum of power loads of the selected commutation device of all adjusted branch lines is equal to the main adjustment value, access phases of the selected commutation devices are controlled to be switched to be target phases, so that loads of the main lines and the branch lines meet a balancing requirement. Therefore, a phenomenon that the load device with the built-in magneticmotion part of the user terminal makes commutation vibration and thus noises are caused is avoided and the system works stably.

Description

technical field [0001] The invention relates to a load balancing technology of a distribution network, in particular to a three-phase load balancing system for main and branch lines of a distribution network suitable for a low-voltage distribution network. The invention belongs to the technical field of power distribution of a low-voltage distribution network. Background technique [0002] The load of the low-voltage distribution network is generally composed of a mixture of three-phase loads and single-phase loads. Residential electricity is all single-phase loads, and the distribution network is relatively complicated. The size is different and the power consumption time is different. Therefore, the three-phase unbalanced condition of the distribution network is irregular and unpredictable in advance, which leads to the long-term unbalanced three-phase load of the distribution network. The Chinese patent application with application number 201510229756.8 discloses a power ...

Claims

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Application Information

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IPC IPC(8): H02J3/26
CPCY02E40/50
Inventor 陈鸽
Owner SHANDONG SHENGLI TONGHAI GRP DONGYING TIANLAN ENERGY SAVING SCI & TECH CO LTD
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