Patent ID: 8996190
Filing Date: 2015-03-31
Classification: H02J,H05B

Abstract:
1. A method for controlling an electrical load exhibiting destabilizing negative-resistance negative-damping characteristics to provide positive damping of power grid oscillations and for controlling the electrical load to operate at a reduced power level when the power grid voltage is reduced, the electrical load being coupled to an AC mains voltage of a mains supplied by the power grid, and the electrical load having a voltage control input V PC to control the amount of power that is delivered to the electrical load, the method comprising: (a) determining a maximum proportionality factor N (b) determining a factor N (c) determining a constant N (d) measuring a modulation envelope of the AC mains voltage, the modulation envelope including a component equal to the peak value of the nominal mains voltage V (e) accentuating the voltage fluctuations of the modulation envelope by the constant N (f) scaling the accentuated signal to form a control voltage signal V (g) substituting the control voltage signal V