Characteristic value determination method for sinusoidal current or voltage signal, involves integrating electrical signal using coupled integrators such that output signal has suitable phase shift

摘要

A first time-periodic signal is produced, and a second signal of equal amplitude and frequency but with a 90 degree phase shift is generated, so that the two signals can be interpreted as two components of a space vector. The second signal is obtained from the first signal be integration, using a filter comprising two coupled integrators (6,9) An Independent claim is also included for electrical signal characteristic value determination apparatus.