To provide a power supply system by the parallel operation of appropriate power conversion apparatuses for balancing the output of the power conversion apparatuses without requiring any current detection means in a load apparatus and a complex transmission apparatus, even in a system where plural power conversion apparatuses and plural load apparatuses are distributed.
The power supply system comprises the power conversion apparatuses 1, 21, and 22 that are connected to an AC bus 4, and the load apparatuses 31, 32, 33, and 34 for obtaining AC power from the power conversion apparatuses via the AC bus. The power conversion apparatus 1 controls a voltage V0 of the AC bus 4 based on a function (f) (I1) with an output current I1 as a variable. Conversely, the power conversion apparatuses 21 and 22 control output currents I21 and I22 to be supplied to the AC bus based on a function g (V0) with the voltage V0 of the AC bus 4 as a variable. At this time, f (I1) and g (V0) are expressed by an inverse function relationship g-1(x)=f(x).
TOYODA EIICHI
NAKADA KIYOSHI
HORIE SATORU
OZAWA HIROYUKI
Next Patent: HYBRID POWER SUPPLY SYSTEM AND ITS OPERATION METHOD