PARALLEL POWER SUPPLYING DEVICE TO AC LOAD SYSTEM

In order to supply a load network 11 by means of an actuating element (for example an invertor 2 which is supplied from a solar generator 1) the magnitudes (/Un/, /Uw/) of the output voltage vector Uw and of the load-voltage vector U-n, and the angular difference or the frequency difference between the two vectors are formed by means of suitable measuring devices. An additional magnitude desired value Uz and an additional phase desired value phi z are in each case formed from input desired values for the real current /Iw/sin phi and the reactive component /Iw/cos phi as well as set parameters R and X for the resistance and the impedance of the coupling circuit, using the relationships /I/ = (/Iw/sin phi ) + R/X.(/Iw/cos phi ) and ( phi = (/Iw/ phi cos phi ) - R/X.(/Iw/sin phi ). The additional magnitude desired value is supplied together with the load-voltage magnitude as the desired value and the output-voltage magnitude as the actual value to a magnitude controller which is connected upstream of the amplitude-control input of the actuating element. If the actuating element also has a phase-control input in addition to a frequency-control input, the additional phase-control desired value is supplied to the phase-control input, and the output of a frequency regulator to which the frequency difference between the load voltage and the output voltage is applied is supplied to the frequency-control input. If only a single input is present for controlling the frequency and phase, a phase regulator is connected upstream of this input, to which the additional magnitude desired value I [lacuna] as the desired value and the angle difference [lacuna] as the actual value ... Original abstract incomplete.