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Control Method of HVDC Converter

A technology of high-voltage direct current transmission and control method, which is applied in the direction of converting DC power input to DC power output, AC power input converting to DC power output, control/regulation system, etc., and can solve fault ride-through failure and inverter commutation failure. and other problems to achieve the effect of realizing fault ride-through and avoiding commutation failure.

Active Publication Date: 2020-02-07
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the technical problems of how to overcome the commutation failure and fault ride-through failure of the converter

Method used

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  • Control Method of HVDC Converter
  • Control Method of HVDC Converter
  • Control Method of HVDC Converter

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Embodiment Construction

[0062] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.

[0063] See attached figure 1 , figure 1 The main structure of the HVDC converter in this embodiment is exemplarily shown. Such as figure 1 As shown, the HVDC converter in this embodiment mainly includes a first commutation circuit and a second commutation circuit. Specifically, the first commutation circuit may include multiple power sub-modules ( figure 1 The shown power sub-module PM-1 to power sub-module PM-K), the DC side ports of each power sub-module are connected in sequence to form the DC side port of the first commutation circuit ( figure 1 The shown terminal P and terminal N form the DC side port). The DC side port of the secon...

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Abstract

The invention relates to the technical field of power electronics, in particular to a control method for a high-voltage direct current transmission converter, and aims to solve the technical problems of how to overcome commutation failure and fault ride-through failure of the converter. For this purpose, the present invention provides a high-voltage direct current transmission converter and a control method thereof. Specifically, the high-voltage direct current transmission converter mainly includes a first commutation circuit composed of multiple power sub-modules cascaded, and the first commutation circuit can output multi-level AC pulse voltage, thereby driving the second commutation circuit The semi-controlled power electronic devices in the circuit are actively turned on or passively turned off, and realize fault ride-through when a fault occurs on the high-voltage AC voltage source side. In this process, it is not necessary to consider the voltage phase of the high-voltage AC voltage source side, so that the commutation failure of the HVDC converter can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a control method for a high-voltage direct current transmission converter. Background technique [0002] The HVDC converter (High Voltage Direct Current Converter, HVDC Converter) mainly includes a line commutated converter (Line Commutated Converter, LCC) based on a thyristor and a flexible converter based on a Voltage-Source Converter (VSC). DC converter. [0003] Specifically, the commutation / commutation control of the thyristor-based grid commutation converter mainly depends on the turn-on and turn-off of the thyristor, and the turn-off of the thyristor is mainly controlled by the peripheral circuit and the controllable quantity of the thyristor only includes triggering horn. Therefore, this kind of converter has the risk of commutation failure and also has the disadvantages of large harmonics and reactive current. Although the invention patent application with p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/521H02M3/155H02M3/135H02M1/06
CPCH02M1/06H02M3/135H02M3/155H02M7/521H02M1/007
Inventor 李子欣高范强徐飞赵聪李耀华王平
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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