ESIG (Energy Systems Integration Group) hosted the #webinar “Evaluating Wind and Solar Power Plant Harmonics Against IEEE Harmonic Standards.” This webinar provided an overview of the topic of harmonics from wind and solar power plants. Transmission system operators are increasingly vigilant to check the harmonic emissions from wind and solar plants during energization. However, the process has been confusing because there are multiple standards; some plants have even seen delayed energization due to concerns for harmonics. In this respect, David Mueller, the Director of Power System Studies with EnerNex, a CESI company, has addressed these various standards and has provided a summary of some of the practices in different countries.