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A Commutation Failure Prediction Method and System Considering the Effects of Multiple Factors

A commutation failure, multi-factor technology, applied in the direction of power transmission AC network, etc., to achieve the effect of improving accuracy and efficiency

Active Publication Date: 2021-12-17
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a commutation failure prediction method and system considering the influence of multiple factors to solve the problem of how to predict whether a commutation failure occurs in a converter station

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  • A Commutation Failure Prediction Method and System Considering the Effects of Multiple Factors
  • A Commutation Failure Prediction Method and System Considering the Effects of Multiple Factors
  • A Commutation Failure Prediction Method and System Considering the Effects of Multiple Factors

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Embodiment Construction

[0063] 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.

[0064] 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 commutation failure prediction method and system considering the influence of multiple factors, including: calculating the value of each influencing factor; calculating the commutation failure according to the value of each influencing factor and the influence degree of commutation failure of the influencing factor Risk value: comparing the commutation failure risk value with a preset commutation failure risk criterion to predict whether commutation failure occurs in the converter station. The commutation failure prediction method considering the influence of multiple factors in the present invention considers a variety of influencing factors leading to commutation failure, determines the commutation failure risk criterion, and determines the commutation failure risk value and commutation failure risk based on these factors The criterion predicts whether a commutation failure has occurred; it can be well identified whether a commutation failure has occurred according to the transient characteristics of the phase angle of the AC side current of the converter station when the commutation fails; at the same time, using the method of the present invention The accuracy and efficiency of prediction and recognition are improved.

Description

technical field [0001] The present invention relates to the technical field of relay protection, and more specifically, relates to a commutation failure prediction method and system considering the influence of multiple factors. Background technique [0002] The converter station of the HVDC transmission project undertakes the function of converting alternating current and direct current. The converter station is divided into a rectifier side and an inverter side. When the converter valve on the inverter side is disturbed by the outside or inside, the converter valve that should be shut off will bear the forward voltage again before recovering the blocking capability. As a result, the valve that should be closed is turned back on and the phase is reversed. At this time, the valve at the other pole is still commutating normally, and forms a bypass with the reversed valve, causing a short circuit on the DC side of the valve. This phenomenon is called commutation failure. Whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 蔡文瑞杨国生杜丁香王兴国曹虹郭雅蓉陈争光王书扬戴飞扬
Owner CHINA ELECTRIC POWER RES INST