VOLTAGE MANAGEMENT DEVICE, VOLTAGE COMMAND DEVICE, POWER SYSTEM MONITORING SYSTEM, MEASUREMENT DEVICE, VOLTAGE MANAGEMENT METHOD, AND STORAGE MEDIUM

A voltage management device according to the present disclosure includes a communication unit that obtains, for each of sections in a power system, a measurement value of a voltage measured by a smart meter connected to that section, where the sections are generated by segmentation between monitoring points, and a voltage estimation unit that estimates, for each of the sections, a voltage drop quantity and a voltage rise quantity in that section using the measurement value.