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A high-voltage direct current transmission system with direct current fault ride-through capability

A DC fault ride-through and high-voltage DC technology, which is applied in the direction of DC network circuit devices, AC power input conversion to DC power output, electrical components, etc., can solve problems such as restricting FBMMC engineering applications, increasing investment costs, etc., and achieve investment savings cost, reduced investment costs, and increased speed

Active Publication Date: 2016-06-29
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the semiconductor devices required by FBMMC are double that of half-bridge MMC, and the investment cost is significantly increased, which seriously restricts the engineering application of FBMMC. Therefore, most VSCs in engineering currently use HBMMC structures.

Method used

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  • A high-voltage direct current transmission system with direct current fault ride-through capability
  • A high-voltage direct current transmission system with direct current fault ride-through capability
  • A high-voltage direct current transmission system with direct current fault ride-through capability

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Embodiment Construction

[0037] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] The invention provides a high-voltage direct current transmission system with DC fault ride-through capability. The high-voltage direct current transmission system includes a rectifier station, a transmission line, and an inverter station. The rectifier station and the inverter station include a converter. The converter on the rectification side The converter on the inverter side is connected through the transmission line; the converter on the rectification side includes a grid commutated converter LCC; the converter on the inverter side includes a voltage source connected in series A converter VSC and a grid-commutated converter LCC, the positive pole of the voltage source converter VSC is connected to the negative pole of the grid-commutated converter LCC.

[0039] The high-voltage overhead transmission line is a line with...

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Abstract

The present invention provides a high-voltage direct current transmission system with DC fault ride-through capability. The high-voltage direct current transmission system includes a rectifier station, a transmission line, and an inverter station. The rectifier station and the inverter station include a converter. The converter and the converter on the inverter side are connected through the transmission line; the converter on the rectification side includes a grid commutated converter LCC; the converter on the inverter side includes a series voltage A source converter VSC and a grid commutated converter LCC, the positive pole of the voltage source converter VSC is connected to the negative pole of the grid commutated converter LCC. The system can not only cut off DC faults and realize fault recovery, but also has DC fault ride-through capability; it solves the problem of overhead line DC faults by using the high-voltage large-capacity long-distance overhead line transmission method, saving the use of cables or full-bridge modular multi-level The investment cost of the converter FBMMC improves the ability of the inverter station LCC to resist commutation failure.

Description

technical field [0001] The invention relates to a device in the technical field of power transmission and distribution, in particular to a high-voltage direct current transmission system with direct current fault ride-through capability. Background technique [0002] Due to the endowment characteristics of energy distribution, it is necessary to transmit a large amount of electric energy from the northwest region with abundant energy reserves to the eastern coastal region with heavy load. Therefore, it is necessary to erect high-voltage and large-capacity lines for long-distance transmission and realize the strategy of west-to-east power transmission. Target. [0003] At present, line commutated converter based high voltage direct current (LCC-HVDC) has been maturely used in large-capacity, long-distance power transmission projects. However, since LCC-HVDC uses thyristors as commutation devices, it needs an AC system with a certain strength to provide commutation support, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J1/00H02J3/36
CPCH02M7/7575Y02E60/60H02M7/4835H02M1/0095
Inventor 郭春义赵成勇彭茂兰刘羽超许建中
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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