Grid oscillation analysis method and apparatus therefor

摘要

A method for determining the contribution of a grid subsystem (12) to oscillations in grid frequency experienced by an external electrical grid (14) in an electrical power network (10). A measurement of grid frequency is taken in the grid sub-system (12) and/or the external electrical grid (14). The measurement(s) of grid frequency can be used to extract oscillations in grid frequency in the grid subsystem (12) and/or the external electrical grid (14). A measurement of active power is recorded on a transmission line (16c) between the grid subsystem (12) and the external electrical grid (14). The phase relationship between the oscillations in grid frequency and the oscillations in active power allows the contribution of the grid subsystem (2) to oscillations in grid frequency in the external electrical grid (14) to be determined.

主权项

1. A method of determining contribution of a grid subsystem to oscillations in grid frequency in an external electrical grid in an electrical power network, the method comprising:
measuring, via at least one phasor measurement unit, oscillations in grid frequency in the external electrical grid; measuring oscillations in power conveyed on at least one electrical connection between the grid subsystem and the external electrical grid; and determining the contribution of the grid subsystem to the oscillations in the grid frequency in the external electrical grid by determining at least one phase relationship between the oscillations in grid frequency and the oscillations in power conveyed to determine a component of the oscillations in power that contributes to the oscillations in grid frequency in the external electrical grid.