Description

The Power Quality interest group takes a broad-spectrum view on PQ issues and collaborates on tools and methods to more quickly assess system events and conditions revealed through the automated analysis of PQ monitoring and advanced metering data.

Focus Areas:

  • Customer Power Quality
  • Power Quality Monitoring and Data Analytics
  • Power Quality Impacts of DER Integration
  • Transmission Power Quality

Workshop

Leveraging Behind-the-Meter Systems for Enhanced Demand Response

Jun 12, 2025 • Webex
Please mark your calendars for our upcoming virtual workshop on Leveraging Behind-the-Meter Systems for Enhanced Demand Response taking place on Thursday, June 12 from 1:00 PM to 3:00 PM ET.Description:As the energy landscape becomes more decentralized and dynamic, utilities are increasingly turning to demand response (DR) programs to manage peak loads, ensure grid reliability, and support renewable integration. The proliferation of smart meters and behind-the-meter (BTM) technologies—including distributed energy resources (DERs), energy storage, and demand-side management tools—offers utilities powerful new mechanisms for enhancing system flexibility and customer engagement.Smart meters enable real-time data collection and analysis, allowing for more accurate forecasting, outage detection, and tailored DR strategies. Meanwhile, BTM systems empower customers to actively control their energy consumption and generation, presenting utilities with new opportunities for collaborative grid management. However, integrating these technologies effectively requires overcoming challenges such as interoperability, data security, customer participation, and alignment with regulatory frameworks and evolving rate structures.This workshop will bring together utility professionals from Canada and the USA to examine how smart meters and BTM systems can be incorporated into next-generation DR programs. Presenters will highlight how they are measuring return on investment (ROI) to assess the effectiveness and value of their initiatives, providing practical benchmarks for other utilities. In addition, each presentation will include a concise set of 3–5 key recommendations or lessons learned, aimed at supporting actionable insights and guiding peer utilities in the implementation or refinement of similar strategies.Presenters:Hydro One Networks: Giselle De GrandisHydro Quebec: Pier Luc DubéIdaho Power: Quentin Nesbitt and Chellie JensenSalt River Project: Laura Olson and Maria Mahar
Webinar

Understanding Power System Oscillation and Stability: An Interharmonic Perspective and Its Practical Applications

Aug 21, 2025 • Virtual - Webex
Power system oscillation is a significant stability concern for system operators and planners. In recent years, there has been a noticeable increase of oscillation events due to the interconnection of inverter-based resources (IBRs). Traditionally, oscillations are investigated using phasor data. This presentation takes a different approach by analyzing the actual voltage and current waveforms underlying the phasors. It is found that oscillations are the appearance of beating waveforms in the phasor domain. The beating waveforms, in turn, are caused by interharmonics (defined per IEC 61000-4-30). Notably, it can be proven that the presence of interharmonics is both a necessary and sufficient condition for power system oscillations, and synchronous generator oscillations can be easily explained using interharmonics. Multiple field measurement results will be used to substantiate these findings. The interharmonic insights could lead to many innovative applications. Two of them will be shared in this webinar: One for locating oscillation sources and another for identifying components that amplify oscillations.It is useful to note that interharmonics are well known in the power quality community. Establishing the link between power system oscillations and interharmonics marks significant progress in power quality data analytics. As a result, power quality engineers, with their expertise on interharmonics monitoring and analysis, can provide unique support to power system oscillation and stability monitoring.Speaker Bio:The presenter, Dr. Wilsun Xu, received Ph.D. from the University of British Columbia, Canada, in 1989. He worked at BC Hydro in Vancouver, Canada for seven years before joining the University of Alberta in Edmonton, Canada, in 1996, where he is currently a professor. Dr. Xu has been engaged in power quality research, education, and consulting for over 30 years, and he was elevated to IEEE Fellow for contributions to power system harmonics analysis in 2005. In recent years, Dr. Xu has been advocating for the application of waveform (and power quality) data to support equipment condition and system stability monitoring. His research work on voltage flicker source location has led to the findings shared in this presentation.