A low-voltage power network three-phase load unbalance control system

A load imbalance and control system technology, applied in the electric power field, can solve problems such as three-phase imbalance that cannot be completely solved, and achieve the effect of avoiding workload and safety accidents

Inactive Publication Date: 2018-12-25
ZAOZHUANG POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +2
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  • Application Information

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Problems solved by technology

However, none of them can completely solve the three-phase unbalance problem.

Method used

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  • A low-voltage power network three-phase load unbalance control system
  • A low-voltage power network three-phase load unbalance control system
  • A low-voltage power network three-phase load unbalance control system

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Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] Such as Figure 1-2 As shown, the low-voltage power grid three-phase load unbalance hierarchical control system of the present invention is composed of load side control system, distribution transformer side control system and communication monitoring system. The load-side control system is installed at the terminal position of the low-voltage distribution network, close to the side of the electrical equipment. The distribution transformer side control system is installed on the distribution transformer side of the low-voltage distribution network. Among them, the load side control system is composed of commutation module, analysis and control module, signal detection module and communication module. The phase commutation module can use a magnetic latching ...

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Abstract

The invention discloses a low-voltage power network three-phase load unbalance control system. The low-voltage power network three-phase load unbalance control system is a hierarchical control system,which includes a load-side control system, a distribution-transformer-side control system and a communication monitoring system. After receiving the three-phase current information and calculating the optimal adjustment strategy by an intelligent algorithm, the control system realizes the initial adjustment through the load-side control system, and then realizes the fine adjustment by changing the capacitance compensation quantity and the capacitance compensation way through the distribution-side control system. The hierarchical control system can regulate three-phase unbalance by automatic detection, calculation, automatic real-time switching and power compensation, thereby effectively solving the problem of the current and voltage imbalance in the power grid caused by the three-phase load imbalance, avoiding manual load adjustment and other manual work and safety accidents, and achieving the balanced and stable operation of the power grid.

Description

technical field [0001] The invention belongs to the technical field of electric power and relates to a three-phase load unbalance control system of a low-voltage power grid. Background technique [0002] my country's urban and rural power grids mainly adopt a three-phase four-wire power distribution system. With the development of the economy, a large number of unbalanced industrial loads have appeared in the power system, such as industrial AC electric arc furnaces, electric locomotives, etc. In the low-voltage distribution network, due to the non-simultaneity of power consumption of single-phase loads and the uncontrollable growth of power consumption, it is easy to cause unbalanced three-phase loads in the distribution area. According to the statistical data of the power distribution transformer monitoring and management system, and after sampling measurement and verification, more than 60% of the distribution transformers have a three-phase unbalance of more than 50%, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26H02J13/00
CPCH02J13/0006H02J3/26Y02B90/20Y02E40/50Y04S40/126
Inventor 王建永王维功王锦旗张少宝王子纯张鲁王帅王建军刘党邓天一宋均剑陈晨张辉
Owner ZAOZHUANG POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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