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Alternating current power transmission system

A technology of power transmission system and AC system, which is applied in the direction of converting AC power input to AC power output, power transmission AC network, electrical components, etc., and can solve problems such as reducing system transmission capacity and increasing system impedance

Pending Publication Date: 2021-09-10
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that adding series reactance and transformer at the same time in the prior art will increase the impedance of the system and reduce the transmission capacity of the system, thereby providing an AC transmission system

Method used

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  • Alternating current power transmission system
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Embodiment Construction

[0022] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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PUM

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Abstract

The invention discloses an alternating current power transmission system which comprises a converter. The converter comprises a plurality of converter valve groups, one end of each converter valve group is connected with a first alternating current system, each bridge arm of the other end of each converter valve group is connected with a winding on one side of a first transformer in series, and the winding on the other side of the first transformer is connected with a second alternating current system. According to the invention, the winding on one side of the transformer is connected with each bridge arm of the converter so that the winding can be used for inhibiting interphase circulation and improving the utilization rate of an IGBT switching device in the converter at the same time, the reactance of the bridge arms of the converter is saved while the normal work of the converter valve is ensured, the system impedance is reduced, and the transmission capability of the system is improved.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an AC power transmission system. Background technique [0002] The flexible low-frequency AC transmission system uses the frequency conversion of electronic power and grid regulation technology to flexibly select the appropriate frequency of 0-50HZ, enhance the flexible regulation capability of the grid, increase the transmission capacity of the grid, and make up for the shortcomings of industrial frequency AC and DC transmission methods. The AC-AC converter in the flexible low-frequency AC transmission system generally adopts a modular multi-level matrix converter (hereinafter referred to as the converter), which can perform flexible control such as power flow regulation and voltage regulation on the power grid while realizing frequency conversion. The core equipment of the AC transmission. [0003] In the related art, when the converter is working, reactances are usu...

Claims

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Application Information

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IPC IPC(8): H02M5/04H02M5/10H02M5/293H02M5/297H02M5/16H02J3/34
CPCH02M5/04H02M5/10H02M5/293H02M5/297H02M5/16H02M5/225H02J3/34
Inventor 赵国亮邓占锋徐云飞陆振纲李卫国乔光尧周丁
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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