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A polar zone fault handling method for hybrid multi-terminal DC transmission system

A fault handling method and transmission system technology, which is applied in the field of fault handling in the polar region of the hybrid multi-terminal direct current transmission system, and can solve problems such as poor reliability of the multi-terminal direct current transmission system

Active Publication Date: 2022-02-11
XUJI GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a pole area fault processing method for a hybrid multi-terminal direct current transmission system, which is used to solve the problem of poor reliability of the multi-terminal direct current transmission system in the prior art

Method used

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  • A polar zone fault handling method for hybrid multi-terminal DC transmission system
  • A polar zone fault handling method for hybrid multi-terminal DC transmission system
  • A polar zone fault handling method for hybrid multi-terminal DC transmission system

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Embodiment Construction

[0028] The purpose of the present invention is to provide a method for processing faults in a single pole region of a hybrid multi-terminal direct current transmission system, which is used to solve the problem of poor reliability of the multi-terminal direct current transmission system in the prior art.

[0029] To achieve the above object, the technical solution provided by the invention is:

[0030] A method for handling faults in polar regions of a hybrid multi-terminal direct current transmission system, comprising the following steps:

[0031] When a fault occurs in the pole area of ​​an inverter station in the system, the single pole area of ​​the inverter station is blocked, and a pole area block instruction is sent to the rectifier station and other non-faulty inverter stations in the system;

[0032] After the rectifier station in the system receives the pole area blocking instruction, it moves the trigger angle of the faulty pole of the rectifier station to the set ...

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Abstract

The invention provides a method for handling polar zone faults of a hybrid multi-terminal DC transmission system. When a fault occurs in the polar zone of an inverter station in the system, the single-pole zone of the inverter station is blocked and sends signals to the rectifier station and other devices in the system. The non-faulty inverter station sends a pole locking command; after receiving the pole locking command, the rectifier station in the system moves the triggering angle of the faulty pole of the rectifier station to the set angle; during the phase shift of the triggering angle, the fault inverter station The voltage at the extreme port of the substation drops to zero, interrupting the power and current of the system; after the non-faulty inverter station in the system receives the polar area locking command, it implements a zero-voltage control strategy; when the current of the isolation switch corresponding to the faulty inverter station It will be disconnected when it is less than the set value. The technical solution provided by the present invention can remove the faulty inverter station from the system when a fault occurs in the polar area of ​​the inverter station, thereby improving the reliability of the hybrid multi-terminal DC transmission system.

Description

technical field [0001] The invention belongs to the technical field of direct current transmission control, and in particular relates to a pole area fault processing method of a hybrid multi-terminal direct current transmission system. Background technique [0002] Since the 1980s, the pace of development of power transmission technology has been significantly accelerated, and methods to improve transmission capacity have emerged. There are high-tech technologies such as DC transmission technology, flexible AC transmission technology, and frequency division transmission technology, as well as existing high-voltage AC transmission technologies. The capacity-increasing transformation technology of transmission lines, such as step-up transformation, reconduction capacity-increasing transformation, AC transmission line to DC transmission technology, etc. Among them, the high-voltage direct current transmission technology has very important practical significance for improving th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26H02J3/36
CPCH02H7/26H02J3/36Y02E60/60
Inventor 范子强吴庆范黄金海曹森周晓风许朋见吴金波李传西
Owner XUJI GRP