WATT-HOUR METER WITH INVERSE POWER FLOW DETECTION FUNCTION

摘要

PROBLEM TO BE SOLVED: To precisely measure surplus power of a power generator in power selling trade by detecting inverse power flow caused by surplus power of a power generator not in power selling trade with simple means and by promptly stopping the power generator not in power selling trade.;SOLUTION: A watt-hour meter 14 which is provided between a distribution line 11 extending from a system power source and a distribution board 12 of a power consumer, measures power generated by an inverse power flow of the power generator 16 in power selling trade, between the power generator 16 in power selling trade and a power generator 17 not in power selling trade, which are owned by the power consumer. The watt-hour meter 14 incorporates an inverse power flow detecting unit 21 for detecting the inverse power flow of the power generator 16 in power selling trade and the power generator 17 not in power selling trade, and for outputting a control signal to stop the power generator 17 on the basis of the detection signal,.;COPYRIGHT: (C)2013,JPO&INPIT