Patent ID: 9627886
Date: 2017-04-18
CPC Classifications: H02J,Y02E,Y04S

Claim:
1. A computer-implemented method for determining voltages of a set of buses of a power system, wherein values of the voltages include a magnitude and a phase angle of the voltages, comprising steps of: providing a connectivity topology of buses connected through branches, wherein the connectivity topology represents such that a bus of the power system is connected with at least one bus of the power system through a branch, wherein each of the buses is associated with a first type of measurement unit or a second type of measurement unit; partitioning the set of buses of the power system into a first-type area and a second-type area based on the connectivity topology of the buses and a type of measurement unit associated with each bus, wherein the first-type area and the second-type area have at least one common bus, and wherein all buses in the first-type area are associated with the first type of measurement unit, and all buses in the second-type area are associated with the second type of measurement unit; calculating the voltages of the buses of the first-type area including the voltage of the common bus based on first type of measurements of the first-type of measurement unit and pseudo measurements derived from second type of measurements of the second type of measurement unit by minimizing a sum of weighted square of measurement errors for all measurements associated with the first-type area; and calculating the voltages of the set of buses of the second-type area using the voltage of the common bus calculated for the first-type area and the second type of measurements of the second type of measurement unit by minimizing a sum of weighted square of measurement errors for all measurements associated with the second-type area, wherein the steps of the method are performed by a processor.