Distributed voltage control for power networks

Systems, methods, techniques and apparatuses of power network control are disclosed. One exemplary embodiment is a power network comprising a plurality of zones (110, 140) each including a plurality of measurement devices (128, 158) structured to measure electrical characteristics of the corresponding zone (110, 140), a zone controller (130, 160) structured to receive measurements from the plurality of measurement devices (128, 158), a distributed energy resource (DER) (115, 116), and a load (112-1 14, 142-144). Each zone controller (130, 160) is structured to receive a set of local measurements from the plurality of measurement devices (128, 158) of the corresponding zone (110, 140), calculate a sensitivity matrix using the received set of local measurements, detenu ine whether a voltage violation has occurred in the con-esponding zone (110, 140), determine a DER set point using the received set of local measurements in response to determining the voltage violation has occurred in the corresponding zone, and transmit the DER set point to the DER (115, 116).