  The diffusion of nonlinear loads and power electronic devices in power
systems deteriorates the signal environment and increases the difficulty of
measuring harmonic phasors. Considering accurate harmonic phasor information is
necessary to deal with harmonic-related issues, this paper focuses on realizing
accurate dynamic harmonic phasor estimation when the signal is contaminated by
certain interharmonic tones, i.e. the out-of-band interference (OBI).
Specifically, this work introduces the singular value decomposition into the
Taylor-Fourier transform algorithm, deriving a general decomposition form for
harmonic phasor filters, and yielding a set of adjustable parameters. Then
these parameters are configured to minimize the negative influence of OBI on
the dynamic harmonic phasor filters. Based on the recommended parameter values,
the optimized harmonic estimator is obtained, and then tested under signals
distorted by OBI, harmonic, noise, and in worse cases, frequency deviation, and
some dynamic conditions. Test results show the proposal achieves good harmonic
phasor estimation even under multiple interferences and dynamic scenarios, and
has a much weaker dependence on OBI tones compared to conventional approaches.
