Electricity Forum Intelligent Power Today Magazine Arc Flash Clothing

Electrical Substations


Lightning Protection

Lightning Strikes

In Canada, lightning flashes occur about 2.34 million times a year; with the highest levels of concentration during the summer months. While most lightning on earth is ground-to-cloud,  recent research has identified that the majority of lightning events to tall structures, such as wind...

Substation Automation

Wireless Networks and Substation Automation

Fitting wireless networks into substation automation applications BY ADAM GUGLIELMO, ABB Tropos Wireless Communication Systems As with all Smart Grid applications, two-way communication is foundational to substation automation. To enable monitoring and control, substation computers, as well as...

Power Transformers



Electrical Transformers

Sweep Frequency Response Analysis

Sweep frequency response analysis: Reliable demagnetization of transformer cores BY MARKUS PÜTTER, MICHAEL RÄDLER, BORIS UNTERER, OMICRON electronics GmbH Whenever a power or distribution transformer is isolated from the power system, it is very probable that residual magnetism remains in the...

Transformation

Protective Relay Frustrations

Solving misoperation with line parameter measurements

BY WILL KNAPEK, OMICRON USA

Between 80 to 90 percent of all power system faults involve ground. Many protective relaying schemes depend on ground distance protection to accurately sense and locate ground faults on multi-terminal sub-transmission and transmission lines. In addition to the need of dependable ground fault detection, protective relay devices must provide adequate selectivity to avoid overtripping for faults outside of its zone of protection and other...

Transformation Articles