Method and system for controlling steady-state voltage rise value after extra-high-voltage direct-current fault

A UHV DC and post-fault technology, which is applied in the direction of automatic disconnection emergency protection devices, electrical components, emergency protection circuit devices, etc., can solve the problem of weakening the steady-state voltage rise of UHV DC faults, etc.

Active Publication Date: 2020-05-05
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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Problems solved by technology

[0005] The present invention proposes a method and system for controlling the steady-state voltage rise after a UHV DC fault to solve the problem of how to weaken the steady-state voltage rise after a UHV DC fault

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  • Method and system for controlling steady-state voltage rise value after extra-high-voltage direct-current fault
  • Method and system for controlling steady-state voltage rise value after extra-high-voltage direct-current fault
  • Method and system for controlling steady-state voltage rise value after extra-high-voltage direct-current fault

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Embodiment Construction

[0047]Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0048] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or overl...

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Abstract

The invention discloses a method and system for controlling a steady-state voltage rise value after an extra-high-voltage direct-current fault, and the method comprises the steps: calculating a firststeady-state voltage rise value of a converter station after the extra-high-voltage direct-current fault happens and a filter is cut off in a current initial operation mode and current direct-currentpower; when the first steady-state voltage rise value is greater than the steady-state voltage rise limit value of the converter station, adjusting the operation modes of the converter station and near-zone reactive power adjustment equipment to an over-compensation operation mode according to a preset operation mode adjustment strategy; calculating a second steady-state voltage rise value of theconverter station after the extra-high voltage direct current fault occurs and the filter is removed; when the second steady-state voltage rise value is greater than the steady-state voltage rise limit value, setting the over-compensation operation mode and direct-current power unchanged, and calculating a third steady-state voltage rise value after an extra-high voltage direct-current fault occurs in the converter station and measures are taken according to a preset control strategy; and when the third steady-state voltage rise value is smaller than or equal to the steady-state voltage rise limit value, taking the current direct-current power as the maximum direct-current transmission power under the steady-state voltage rise constraint.

Description

technical field [0001] The invention relates to the technical field of power system operation and control, and more specifically, to a control method and system for steady-state voltage rise after a UHV DC fault. Background technique [0002] UHVDC transmission technology has the characteristics of long-distance and large-capacity transmission. With the continuous development of UHV DC transmission technology, the capacity of single-circuit UHV DC transmission projects continues to increase. The current single-circuit UHV DC power has reached 10 million kilowatts and will be further increased to 12 million kilowatts. These large-capacity long-distance UHV DC transmission projects are of great significance in promoting the optimal allocation of China's energy resources nationwide and relieving the pressure of air pollution prevention and control. [0003] However, due to the large output power of the UHVDC transmission project, if a fault disturbance such as single-pole or b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H3/36H02H3/50
CPCH02H7/268H02H7/262H02H3/36H02H3/50Y02E60/60Y02E40/30
Inventor 贾俊川仲悟之易俊赵兵郑帅飞程势高王琦吕晨林伟芳刘丽平屠竞哲吴萍贾琦
Owner CHINA ELECTRIC POWER RES INST
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