1. IEC, 61000-4-30: electromagnetic compatibility: testing and measurements techniques - Power quality measurement methods (2015).
2. IEEE Standard Association, IEEE guide for voltage sag indices (2014). doi:10.1109/IEEESTD.2014.6842577.
3. Power Systems Harmonics;Arrillaga,2003
4. Power quality aspects of solar power. technical brochure 672;Tech. rep,2016
5. Experiences on using gapless waveform data and synchronized harmonic phasors;Xu,2015