Capacitor resonance early warning system and method based on capacitor branch monitoring point

Abstract

The invention discloses a capacitor resonance early warning system and method based on a capacitor branch monitoring point. The capacitor resonance early warning system is composed of a harmonic monitoring module, a data storage module, a resonance analysis starting module, a resonance point calculating module and a resonance early warning module which are connected in sequence. The harmonic monitoring module is used for continuously collecting the harmonic current data of all capacitor branch current transformers (CT). The data storage module is used for achieving storage of a power quality data collecting module and equipment machine account data. The resonance analysis starting module is used for starting the resonance point calculating module through a harmonic amplitude. The resonance point calculating module is used for estimating resonance points of a capacitor bank. The resonance early warning module is used for comprehensively estimating the resonance early warning level through integrated harmonic amplification times and the scanning result of harmonic impendence. The capacitor resonance early warning system and method based on the capacitor branch monitoring point have the advantages of being small in data collecting amount, simple in structure, and reliable in early warning result.

Description

Technical field [0001] The invention relates to a high-voltage parallel power capacitor resonance early warning system and an early warning method, in particular to a capacitor resonance early warning system and an early warning method aimed at capacitor branch circuit measuring points. Background technique [0002] High-voltage parallel power capacitors are the most common reactive power compensation equipment in power systems, and capacitor resonance is one of the most important factors for capacitor equipment damage. Capacitor resonance is instantaneous and destructive. Transientness means that the capacitor resonance usually only lasts for a few seconds, not too long. It is usually difficult to directly observe this phenomenon and make a judgment by artificial means; the destructiveness of capacitor resonance means that when the resonance is satisfied When the condition is reached, the capacitor resonance behavior will occur until the capacitor is damaged and the resonance c...

AI Technical Summary

Problems solved by technology

The off-line analysis method is suitable for the inference after the capacitor resonance accident, and cannot achieve the purpose of on-line monitoring and early warning of the capacitor resonance. Therefore, the present invention proposes a current data collected by a current transformer using a parallel capacitor branch and an equipment platform Device and method for on-line resonance early warning based on account data

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