APPARATUS FOR DISCRIMINATING INDEPENDENT OPERATION OF GENERATOR, WHEN POWER CONSUMER HAVING POWER GENERATING FACILITY FITTED WITH THE GENERATOR SYSTEM- INTERCONNECTS WITH ELECTRICAL ENTERPRISER

摘要

PROBLEM TO BE SOLVED: To discriminate that the generator of power generating facilities has fallen into independent operation, when a power consumer having power generating facilities system-interconnects with an electrical power agency.;SOLUTION: Current transformers (CTs) are fitted to phases R and S for detecting unbalance among three-phase load currents inside a power consumer. Similarly, CTs are fitted to the same phases for detecting unbalance among supply currents from the generator. A detected signal from each CT is inputted to a circuit, composed of an effective value circuit, a differential amplifier, and a microcomputer.;COPYRIGHT: (C)2002,JPO