Active tide control power grid and control method of power exchange power node and medium-voltage distribution network

A power exchange and power flow control technology, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problems of inability to greatly improve the reliability of power distribution, lack of flexibility, and long construction period, and increase equipment utilization. , avoid frequent interruption, improve the effect of utilization

Inactive Publication Date: 2015-09-23
ZHEJIANG UNIV +1
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  • Application Information

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Problems solved by technology

There are a series of problems in the above technical measures, such as: large investment, long construction p...

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  • Active tide control power grid and control method of power exchange power node and medium-voltage distribution network
  • Active tide control power grid and control method of power exchange power node and medium-voltage distribution network
  • Active tide control power grid and control method of power exchange power node and medium-voltage distribution network

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0023] The working principle of the present invention is: the power exchange node connects two or more medium-voltage distribution lines through incoming line switches, step-down transformers, AC / DC converters, DC bus bars and other components, and through the power exchange node Coordinated control among medium-voltage AC / DC converters, adjust the active and reactive power flow of each line, and realize active control of the flow of each medium-voltage distribution line. The monitoring system in the power switching node accepts the command of the dispatching center through fast communication, and reasonably adjusts the power flow of each medium-voltage distribution line. The DC bus in the power exchange node can be connected to large DC loads. When dealing with large emerging loads such as electric vehicle charging fast charging stations and large d...

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Abstract

The invention discloses an active tide control power grid and control method of a power exchange power node and a medium-voltage distribution network. The power exchange node is configured in a distribution network, two and more than two medium-voltage distribution lines are connected by the power exchange node, and the active tide and the reactive tide of the connected medium-voltage distribution lines is actively controlled through an AC(Alternating Current)/DC (Direct Current) converter in the power exchange node; the power exchange node comprises two or more than two medium-voltage distribution line incoming switches, distribution voltage reduction transformers corresponding to the two or more than two medium-voltage distribution line incoming switches, two or more than two AC/DC converters corresponding to the distribution voltage reduction transformers, a direct-current bus and a node state monitoring system. The power exchange node can continuously and smoothly control the active tide and the reactive tide of each connection line, prevents the switch from frequently switching on or off, increases a use ratio of equipment, prolongs the service life of the equipment and improves power supply reliability.

Description

technical field [0001] The invention relates to the field of optimized operation of a medium-voltage distribution network. Specifically, a distribution network "power exchange node" is introduced into the medium-voltage distribution network to actively control the power flow of the medium-voltage distribution network. technical background [0002] The medium-voltage distribution network in the power system is connected to the power users under the transmission network, and plays an important role in distributing electric energy in the power network. Compared with other power networks, the most notable feature of the medium-voltage power distribution network is that, as the end of the power grid, it can respond sensitively to changes in power loads. During the transmission and distribution of electric energy, the transformers and line components in the medium-voltage distribution network must consume a certain amount of electric energy. Among them, the network loss of the 10k...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/38
Inventor 梁一桥黄帅江道灼
Owner ZHEJIANG UNIV
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