Patent ID: 8053925

Claim:
A system comprising: a modulation monitor and control unit (MMCU) including a monitor configured to monitor loads on a power grid, the power grid having a plurality of connections including unused connections to which a load is not connected and used connections to which a load is connected; a detector configured to detect a modulation voltage on the power grid; and a controller configured to receive signals from the detector and to control connections to the power grid by outputting a disable signal to cause disabling of power to the unused connections in accordance with the detected modulation voltage exceeding a first threshold and disabling of power to the used connections in accordance with the detected modulation voltage exceeding a second threshold, the used connections being disabled one at a time at a first time interval each for a period given by a second time interval, and outputting a reenable signal to cause restoration of power to the used connections and to the unused connections in accordance with the detected modulation voltage being less than a third threshold.