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Control method, device and electronic device for hybrid cascaded direct current transmission system

A DC transmission system, hybrid cascading technology, applied in emergency protection circuit devices, circuit devices, emergency protection circuit devices, etc. for limiting overcurrent/overvoltage, to reduce input frequency, high-efficiency information transmission, and protect power grids The effect of equipment

Active Publication Date: 2022-07-22
NR ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a fault occurs, switching on the DC energy consumption device can suppress the DC overvoltage during the fault, and frequent switching on and off of the energy consumption device may cause damage to the energy consumption device
[0004] The invention provides a DC overvoltage control method and control system for an AC fault in a hybrid cascaded DC system, which can alleviate the DC overvoltage problem during a fault on the basis of fully utilizing the power transmission capacity of the converter

Method used

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  • Control method, device and electronic device for hybrid cascaded direct current transmission system
  • Control method, device and electronic device for hybrid cascaded direct current transmission system
  • Control method, device and electronic device for hybrid cascaded direct current transmission system

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Embodiment Construction

[0040]Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and thus their repeated descriptions will be omitted.

[0041] The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of the embodiments of the present disclosure. However, one skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of th...

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Abstract

The application relates to the field of high-voltage power transmission, and in particular to a control method for a hybrid cascaded direct current transmission system, the hybrid cascaded direct current transmission system includes a rectifier station and an inverter station, and the inverter station includes a plurality of voltage source type connected in parallel A converter, the method includes: obtaining an RMS voltage of the AC side of the voltage source converter; judging whether the voltage source converter is faulty based on the voltage RMS; When the converter fails, at least one of the normally working voltage source converters is controlled to perform power compensation.

Description

technical field [0001] The present application relates to the field of high-voltage power transmission, and in particular to a control method, device and electronic equipment for a hybrid cascaded direct current power transmission system. Background technique [0002] The DC transmission project is divided into the rectifier side and the inverter side. The conventional DC transmission system (LCC-HVDC) based on the grid commutation converter has the advantages of small loss, low cost and mature operation technology, but at the same time, the inverter side is easy to The commutation failure occurs, the dependence on the AC system is strong, and the absorption of a large amount of reactive power is insufficient. The flexible DC transmission system based on voltage source converter (VSC-HVDC) has the advantages of no commutation failure, decoupling control of active and reactive power, passive operation, and compact structure. When all VSC converters are used on the inverter s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36H02H9/04
CPCH02J3/36H02H9/045Y02E60/60
Inventor 常昊添王柯随顺科姜崇学董云龙卢宇赵文强侍乔明田杰李海英
Owner NR ELECTRIC CO LTD