DECENTRALIZED POWER GRID-CONNECTED DISTRIBUTION SYSTEM USING SUNRISE-SUNSET TIME AND GRID-CONNETION METHOD FOR DECENTRALIZED POWER SUPPLY SYSTEM USING THE SAME

摘要

PURPOSE: A decentralized power gird-connected distribution system using a sunrise and sunset time and a grid-connection method for the same are provided to let an inverter control grid-connection of a decentralized power supply system, thereby preventing an accident and power loss due to misconnection. CONSTITUTION: A decentralized power grid-connected distribution system comprises a main power production source (10) including electrical power systems; a power group (30) having a plurality of unit power sources; a switchgear (20) having a main circuit breaker and controls the main circuit breaker to connect or disconnect the main power production source to or from the power group; and a supervisory control system providing information of sunset and sunrise. The switchgear further includes an operation power supplying unit comprising an operation power transformer; an operation power main circuit breaker; and an operation power sub circuit breaker connected between the operation power transformer and an inverter. [Reference numerals] (40) Monitoring control system