高調波特性測定方法及び高調波特性測定装置

Method and device for measuring harmonic characteristics

Abstract

(57)【要約】 【課題】 注入時の電力系統の次数間高調波の電圧,電 流の計測値から系統既存の次数間高調波のノイズを精度 よく除去して測定性能の向上を図る。 【解決手段】 注入時の前,後の少なくとも一方の非注 入時に系統基本波に同期してサンプリングした電力系統 の電圧,電流のデジタル周波数解析から系統既存の注入 周波数のノイズを求め、非注入時の前記ノイズの位相の 注入時の位相への補正又は注入時の前記計測値の位相の 非注入時の位相への補正を施して前記計測値から前記ノ イズを減算し、前記計測値から前記ノイズを除去して注 入周波数の次数間高調波についての等価回路定数を算出 する。
PROBLEM TO BE SOLVED: To improve measuring performance by precisely removing the noises of existing order-to-order harmonies in a system from measured values for a voltage and a current of the order-to-order harmonies in the power system during filling. SOLUTION: The noises of the existing filling frequency of the system are found from the digital frequency analysis of a voltage and a current in the power system sampled in synchronization with the system fundamental waves during non-filling at least either before or after filling. The noises are subtracted from the measured values by correcting the phase of the noises during non-filling to the phase during filling or the phase of the measured values during filling to the phase during non-filling. An equivalent circuit constant for the order-to- order harmonies of the filling frequency is calculated by removing the noises from the measured values.

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    JP-2007086030-AApril 05, 2007Univ Nihon, 学校法人日本大学Analyzer and method for analyzing electrical signal