Some embodiments of the present disclosure may be illustrated as a method of controlling a voltage at a load device. The method may comprise measuring a first voltage at the load device at the beginning of a first cycle in a cyclic measurement pattern. The method may also comprise detecting, based on the first voltage, a first change in the voltage, and determining that the first change in the voltage is below a voltage-change threshold. The method may further comprise controlling the voltage according to a first cyclic control pattern based on that determination. The method may also comprise measuring a second voltage at the load device at the beginning of a second cycle in the cyclic measurement pattern. The method may also comprise detecting, based on the second voltage, a second change in the voltage, and determining that the second change in the voltage is above a voltage-change threshold. The method may further comprise controlling the voltage according to a second cyclic control pattern based on that determination. The first cyclic control pattern may operate at a first frequency. The cyclic measurement pattern and the second cyclic control pattern may operate at a second frequency. The second frequency may be a positive-integer multiple of the first frequency. The positive-integer multiple may be greater than 1.