Application Note INTRODUCTION Voltage sags, or dips are the most common type of power quality (PQ) event. Knowing the directivity of the sag, or where it originated, is very import when trying to locate its source and to ultimately mitigate the problem. This application note outlines some rules of thumb to help determine the directivityContinue reading “Determining Sag Directivity”
Yearly Archives: 2021
Power Quality Monitoring & Analytics for Transmission & Distribution Systems
Published by Doug Dorr, Electric Power Research Institute Manager, Advanced Monitoring Applications Group.
EPRI Safety Related Research Programs & Projects
Published by Doug Dorr, Electric Power Research Institute Manager, Advanced Monitoring Applications Group.
Using PQ Data for Utility Equipment Assessment and Incipient Failure
Published by Bill Howe, PE, CEM Program Manager, EPRI Power Quality Manager, EPRI Industrial Center of Excellence.
Reactive Power Conditioning
The Full Power Factor Solution Published by Laurent Maillefer, ABB, DM, Power Protection, May 2014.
Smart Grid
Published by SmartGrid.gov The Smart Grid Maybe you have heard of the Smart Grid on the news or from your energy provider. But not everyone knows what the grid is, let alone the Smart Grid. “The grid,” refers to the electric grid, a network of transmission lines, substations, transformers and more that deliver electricity fromContinue reading “Smart Grid”
Beware Rotation Issues on Transformers
Published by Tom Shaughnessy, Shaughnessy Consulting Services 208 Jasper Way, San Marcos, CA 92078 408-666-4009 Background Phase rotation is something that contractors and electricians routinely check during construction and installation of motors and UPS systems. In facilities with only one service, seldom does a rotation change require utility involvement. However, complications can and do ariseContinue reading “Beware Rotation Issues on Transformers”
Power Quality the Economic Challenge for Utilities & Users
Published by Terry Chandler, Director of Engineering, Power Quality Thailand LTD/Power Quality Inc., USA.E-mail: terryc@powerquality.org, terryc@powerquality.co.th Please feel free to leave a question in the comments section or contact Terry Chandler, terryc@powerquality.org, terryc@powerquality.co.th
Power Quality Blog 