POWER ESTIMATION DEVICE FOR POWER DISTRIBUTION SYSTEM, AND POWER ESTIMATION METHOD

摘要

PROBLEM TO BE SOLVED: To estimate active power that a photovoltaic power generation device outputs, and active power to be consumed by a load even in the case where a voltage regulation apparatus that regulates reactive power is present in a power distribution system.SOLUTION: A conversion formula is constructed by acquiring active power and reactive power at a low-voltage user from power meters P1 and P2. An active power estimate (conversion) to be consumed by the load is calculated by converting the reactive power measurement in the conversion formula into reactive power measurement of P1-reactive power measurement minus P2-reactive power measurement in a section 1, into reactive power measurement of P2-reactive power measurement minus P3-reactive power measurement minus a high-voltage user in a section 2, and into reactive power measurement of P3-reactive power measurement minus P4-reactive power measurement minus the high-voltage user≒0 in a section 3, respectively. An active power estimate to be consumed by the load is calculated by adding an active power measurement of the high-voltage user measured by a meter M to the active power estimate (conversion). Further, an active power estimate that the photovoltaic power generation device outputs is calculated by subtracting the active power measurement from the active power estimate.SELECTED DRAWING: Figure 1