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A load side three-phase unbalance treatment device and a treatment method thereof

A load-side, three-phase technology, applied in the field of three-phase unbalance control devices on the load side, can solve the problems of exacerbated three-phase unbalance, three-phase unbalanced area, missing, etc., to avoid heat generation and aging damage, eliminate Effect of burnout, reduction of iron loss and copper loss

Pending Publication Date: 2019-01-08
GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the electricity consumption of residents is also affected by factors such as seasons, weather, holidays, etc., which seriously aggravates the three-phase imbalance.
[0005] Due to the lack of effective methods, the three-phase unbalance problem is still a prominent problem in the current station area

Method used

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  • A load side three-phase unbalance treatment device and a treatment method thereof
  • A load side three-phase unbalance treatment device and a treatment method thereof
  • A load side three-phase unbalance treatment device and a treatment method thereof

Examples

Experimental program
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Embodiment 1

[0027] Embodiment 1: as Figure 1-Figure 2 As shown, a load-side three-phase unbalance control device includes an SVG module and multiple phase change switches. The SVG module and phase change switches are connected through a wireless communication module. The SVG module is installed on the output bus of the distribution transformer. Each reversing switch is respectively installed on multiple branch lines with heavy load, the branch lines are connected to the output bus line, and the SVG module is connected to the remote monitoring terminal or portable terminal through the GPRS module.

[0028] Branch loads below 15A are light loads, 15A to 30A are medium loads, and more than 30A are heavy loads, where the commutation switch can operate.

[0029] The "SVG+phase change switch" hybrid compensation device of the present invention is composed of one SVG module and multiple phase change switches (proportioned according to the actual situation on site). The SVG module is an intelli...

Embodiment 2

[0039] Embodiment 2: as Figure 1-Figure 2 As shown in Fig. 1, a treatment method for a three-phase unbalance control device on the load side, an SVG module is installed at the outlet of the distribution transformer, which is responsible for monitoring the three-phase unbalance information and issuing adjustment commands. Multiple branches are installed along the front end of the user Multiple commutation switches, the commutation switch monitors the load information of its own load circuit, and performs the corresponding commutation operation according to the commutation command issued by the SVG module. If the three-phase imbalance still exists, the fine-tuning mode of the SVG is used to realize the three-phase Absolutely balanced.

[0040] In order to ensure the service life, the commutation switch adopts the zero-crossing switching technology to minimize the damage to the operating components and electrical equipment caused by switching. The zero-crossing switching techno...

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Abstract

The invention discloses a load side three-phase unbalance treatment device and a treatment method thereof, comprises an SVG module and a plurality of commutating switches, A SVG module and a commutation switch are connected through a wireless communication module, The SVG module is installed on the output main line of the distribution transformer, a plurality of commutation switches are respectively installed on a plurality of branch lines with heavy load, the branch lines are connected to the output main line, and the SVG module is connected to a remote monitoring terminal or a portable terminal through a GPRS module. The invention can realize automatic balancing of three-phase load: real-time monitoring of three-phase unbalance degree, automatic regulation of three-phase load according to the unbalance degree, commutation time <= 10 ms, no interruption of user power supply, no reset and restart of common electric appliances, and no damage to electric appliances.

Description

technical field [0001] The invention relates to a load-side three-phase unbalance control device and a control method thereof, belonging to the technical field of three-phase unbalance control equipment. Background technique [0002] Three-phase unbalance is an important indicator of power quality. The existence of three-phase load unbalance in low-voltage distribution network not only increases transformer and line loss, but also affects the safe operation of equipment. Therefore, it is of great practical significance to control three-phase load unbalance. . [0003] The unbalanced three-phase load of low-voltage distribution network is a long-term objective problem. [0004] With the development of urban and rural economies, policies to benefit the people such as "home appliances going to the countryside" and "photovoltaic poverty alleviation" have been gradually implemented. Under the current situation, the load on the power grid will increase accordingly. It is diffic...

Claims

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Application Information

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IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 张英潘科熊波娄方桥王德贺林美玲马新惠汤晓霞张郝宁符玉珊
Owner GUIZHOU POWER GRID CO LTD