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1. (WO2017195346) ELECTRIC POWER MEASUREMENT SYSTEM AND ELECTRIC CURRENT MEASUREMENT STATION

Pub. No.:    WO/2017/195346    International Application No.:    PCT/JP2016/064263
Publication Date: Fri Nov 17 00:59:59 CET 2017 International Filing Date: Sat May 14 01:59:59 CEST 2016
IPC: G01R 21/06
Applicants: ANYWIRE CORPORATION
株式会社エニイワイヤ
Inventors: ITANI Kazuo
井谷一夫
Title: ELECTRIC POWER MEASUREMENT SYSTEM AND ELECTRIC CURRENT MEASUREMENT STATION
Abstract:
The present invention is provided with: a voltage value calculation means for calculating the voltage value of an alternating-current voltage; a voltage zero-cross-time calculation means for detecting the zero cross of the alternating-current voltage and calculating the time from a start point determined on the basis of a reference timing signal to the zero-cross of the alternating-current voltage; an electric current value calculation means for calculating the electric current value of an alternating electric current; an electric current zero-cross-time calculation means for calculating the time from the start point to the zero-cross of the alternating electric current; an electric power calculation means for calculating the phase difference of the alternating-current voltage and the alternating electric current on the basis of the time until the zero-cross of the alternating-current voltage and the time until the zero-cross of the alternating electric current and calculating an electric power on the basis of the voltage value, the electric current value, and the phase difference; and a reference timing transmission means for transmitting the reference timing signal. The phase difference necessary for calculating the electric power is calculated on the basis of the time until the zero-cross of the alternating-current voltage and the time-until the zero-cross of the alternating electric current from the start time determined on the basis of the reference timing signal, and the voltage and the electric current can therefore be measured separately.