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Phase modifier optimal configuration method and system for suppressing new energy transient overvoltage

A technology of transient overvoltage and optimized configuration, applied in the direction of emergency protection circuit device, circuit device, emergency protection circuit device for limiting overcurrent/overvoltage, etc.

Active Publication Date: 2021-09-10
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

[0005] The present invention proposes a method and system for optimizing the configuration of the condenser for suppressing the transient overvoltage of new energy sources, so as to solve the problem of how to optimize the configuration of the condenser for the new energy station

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  • Phase modifier optimal configuration method and system for suppressing new energy transient overvoltage
  • Phase modifier optimal configuration method and system for suppressing new energy transient overvoltage
  • Phase modifier optimal configuration method and system for suppressing new energy transient overvoltage

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Embodiment Construction

[0040] 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.

[0041] 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 over...

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Abstract

The invention discloses a phase modifier optimal configuration method and system for suppressing new energy transient overvoltage. The method comprises the steps of calculating a new energy multi-station short-circuit ratio of each new energy connected to a target alternating-current and direct-current hybrid power grid and the transient overvoltage of each new energy when the target alternating-current and direct-current hybrid power grid breaks down; when the transient overvoltage of the new energy is greater than a transient overvoltage threshold, determining a new energy multi-station short-circuit ratio threshold according to the multi-station short-circuit ratio and the transient overvoltage of each new energy; configuring a phase modifier at the grid-connected point low-voltage side of the new energy with the minimum new energy multi-station short-circuit ratio, and recalculating the new energy multi-station short-circuit ratio of each new energy; when the new energy multi-station short-circuit ratio of each new energy is greater than or equal to a new energy multi-station short-circuit ratio threshold value, recalculating the transient overvoltage of each new energy; and when the transient overvoltage of each new energy is smaller than or equal to the transient overvoltage threshold, determining that the current phase modifier configuration scheme is the optimal phase modifier configuration scheme.

Description

technical field [0001] The present invention relates to the technical field of multi-new energy station access AC-DC hybrid power grid planning and operation control, and more specifically, relates to a method and system for optimizing the configuration of a condenser for suppressing transient overvoltage of new energy sources. Background technique [0002] Large-capacity UHV AC-DC long-distance power transmission is an important measure to solve large-scale new energy base transmission and prevent air pollution. A series of challenges, such as the self-oscillation and overvoltage problems caused by the large-scale connection of new energy generators to weak power grids, have seriously restricted the security of the power grid and the delivery of new energy. When commutation failure and DC blocking fault occur in the DC system, there will be a stage of excess reactive power in the converter station at the sending end, which will lead to an increase in the voltage of the AC b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J5/00H02J3/46H02H9/04
CPCH02J3/381H02J5/00H02J3/466H02H9/04H02J2300/20
Inventor 孙华东周莹坤徐式蕴郭强赵兵郭得扬
Owner CHINA ELECTRIC POWER RES INST
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