Power system and control method of the power system

摘要

Provided is a power system that can arbitrarily set output power while stabilizing output voltages. Connection terminals 13 and 23 of lower power sources 1 and 2 are connected to external connection terminals 41 in parallel. Voltage measurement section 31 measures voltage values of external connection terminals 41 as measured voltage values. Power converters 12 and 22 measure power supply capacities of lower power sources 1 and 2, respectively. Output instruction section 32 adjusts power or currents flowing through connection terminals 13 and 23 based on the measured voltage values and the power supply capacities so that the measured voltage values are included in a predetermined voltage range.

主权项

1. A power system comprising power sources, connection terminals of said power sources connected to an external connection terminal in parallel, the power system comprising:
a voltage measurement section that measures a voltage value of said external connection terminal as a measured voltage value; a capacity measurement section that measures a power supply capacity of each power source; and an adjuster that adjusts power or a current flowing through each connection terminal based on the measured voltage value and the power supply capacity so that the measured voltage value is included in a predetermined voltage range, wherein when each power source is notified of a total instruction value indicating a total amount of power or a total amount of current that is to flow through said external connection terminal, and notified of a sharing ratio indicating a ratio of an amount of power or an amount of current, that is to flow through said connection terminal of said power source, to the total instruction value, said power source distributes power or a current according to the total instruction value and the sharing ratio to said connection terminal, said adjuster adjusts the power or the current flowing through each connection terminal by notifying each power source of the total instruction value and the sharing ratio to adjust the power or the current flowing through each connection terminal, said adjuster activates as many power sources as an activation number corresponding to the total instruction value among said power sources to adjust the power or the currents flowing through said connection terminals of said activated activation power sources, said adjuster increases the activation number to correspond to an increase in the total instruction value, and said adjuster increases the activation number when the total instruction value exceeds a first threshold and reduces the activation number when the total instruction value falls below a second threshold smaller than the first threshold after increasing the activation number.