A voltage regulation system for an electrical power distribution network that receives electricity from one or more distributed energy resources includes: a voltage regulation device configured to maintain a voltage in the electrical power distribution network to within a voltage bandwidth, the voltage bandwidth including a range of voltages; and a control system coupled to the voltage regulation device, the control system configured to: analyze voltage data, the voltage data including a plurality of voltage samples, each of the voltage samples representing the voltage in the electrical power distribution network at a time within a period of time; determine an adjusted voltage bandwidth for the voltage regulation device based on the analysis; and change the voltage bandwidth of the voltage regulation device to the adjusted voltage bandwidth.