A method and device for flexible interconnection of power distribution ring network based on magnetic control adjustable reactor

A reactance adjustment and magnetic control technology, which is applied to circuit devices, AC networks with the same frequency from different sources, electrical components, etc., can solve the problem of limited control ability, inability to solve ring closing impact current, feeder load balancing and new energy consumption. In order to achieve the effect of flexible loop closure, improvement of new energy consumption capacity, and uninterrupted power supply

CN111864755BActive Publication Date: 2022-03-18HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-03-18

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Abstract

The invention discloses a method and device for flexible interconnection of a power distribution ring network based on a magnetically controlled adjustable reactor, belonging to the field of active control of the power distribution ring network. The method includes: connecting the primary side of the magnetic control adjustable reactor with double windings in parallel between two feeders of the distribution network; changing the equivalent impedance of the primary side of the magnetic control adjustable reactor to realize the flexible combination between the two feeders environment, steady-state power flow regulation, new energy consumption and transient load transfer. The present invention can effectively reduce the amplitude of the ring-closing impact current under the condition of a certain ring-closing voltage difference, realize flexible ring-closing, and avoid excessively high ring-closing impact current. The present invention is based on the topological structure of the magnetic flux control adjustable reactor, and through different internal control strategies, it can respectively realize the steady-state power flow regulation and the power distribution ring network regulation and control function of improving the new energy consumption capacity. The invention realizes the uninterrupted power supply of the feeder load on the fault side by controlling the primary side winding of the reactor to enter a near-short-circuit state.
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Description

technical field

[0001] The invention belongs to the field of active regulation and control of a distribution ring network, and more specifically relates to a method and device for flexible interconnection of a distribution network based on a magnetically controlled adjustable reactor. Background technique

[0002] As the main energy used in modern society, electric energy is widely used in all walks of life. The distribution network belongs to the end of the power system and is directly connected to the users. Therefore, the quality of the distribution network directly affects the user's satisfaction with the power system. With the continuous development of the distribution network, users' requirements for power supply reliability continue to increase. For example, the stringent requirements of some high-end manufacturing equipment and some important agencies for uninterrupted power supply have brought severe challenges to the distribution network; due to different feeder li...

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Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0045] First, the basic principle of the flexible interconnection device of the distribution ring network based on the magnetically controlled adjustable reactor proposed by the present invention will be described.

[0046] figure 1 It is a schematic diagram of the flexible interconnection device of the distribution ring network based on the magnetically controlled adjustable reactor connect...