POWER SUPPLY SYSTEM, REACTIVE POWER SUPPLY METHOD, INDEPENDENT POWER EQUIPMENT PARALLEL-OFF METHOD AND REACTIVE POWER SUPPLY COMMAND DEVICE

摘要

PROBLEM TO BE SOLVED: To stabilize the operation of a power network and cut down on the cost thereof by effectively utilizing a reactive power supply owned by a customer. SOLUTION: A power supply system is composed of an incoming terminal power measuring means 6 for measuring the power of a connecting point 3a and a reactive power supply command device 8 for commanding reactive power to be outputted, and formed by connecting the customer 2 and the measuring means 6, and the customer and the command device 8 by a high-speed communication network 9. In the system, the command device 8 comprises: a means for preparing a power network map wherein impedance between the connecting points, the reactive power supply capability of each an electric power plant, substation and customer and the connecting point; a means for constantly collecting a present voltage, power factor and reactive power via the high-speed communication network 9; a means for calculating necessary reactive power by searching an abnormality occurring point on the map; a means for searching and specifying a customer who is located most approximately to the abnormality occurring point on the map and to whom the reactive power can be supplied; a means for calculating the present value of the suppliable reactive power of the customer and outputting a reactive power supply command; and a means for integrating the output amount of the reactive power of the customer and calculating a power selling price.