Abstract: The present invention relates to a method for controlling a controllable electrical load connected to an electrical distribution system, comprising measuring (401) an electrical voltage signal v in the electrical distribution system, calculating a short term average (402) over a short time period based on the electrical voltage signal and a long term average (403a) over a long time period based on the electrical voltage signal, the long time period being greater than the short time period, and subtracting (406) the short term average from the long term average, said subtraction derives a delta value (407), then multiplying the delta value with a gain factor (420) to get a first desired power consumption, controlling the controllable electrical load according to the first desired power consumption (414). The invention also related to an autonomous voltage load controller.