Power Quality

Power quality is relatively new terminology. It is a focus term for problems that arise from what are essentially poorly engineered systems. Electrical equipment has always been affected to some degree by the quality of electrical power delivery. However, modern cost reduced electrical control equipment contains a refinement of components that make it more vulnerable to aberrations in voltage wave form or sensitive to "Power Quality". Causes of power quality problems and their resolution requires an understanding of both the power distribution system feeding an industrial plant and the power distribution system used within the industrial plant itself. Commonly 40% of power quality issues relate to the delivery of power from the utility and 60% relate to the use of power within an industrial facility. The challenge is to raise awareness of problems that do arise, their resulting economic impact, and the solutions available to solve them. There are a variety of solutions from which to choose and many are straightforward and relatively inexpensive.

RGLSolutions offers an objective, straightforward, reasoned, analytical approach to solving power quality problems. The solutions may be mechanical as well as electrical in nature. We are able to draw on our detailed knowledge and experience of utilities, industrial manufacturers, and end users, as well as component design, to provide recommendations for mitigation of power quality problems.

Grounding
Transformer configuration
Transformer rating (sizing)
Voltage level
Voltage unbalance
Harmonics
EMI/RFI
Power factor capacitor switching transients
Single phase sags
Three phase sags
Voltage swell
Transient over-voltage
Utility delivery
Industrial distribution

There may be a number of solutions available for a problem. The cost of one solution over another may be significant. Often the inexpensive solution will be the prudent choice. RGLSolutions will offer possible solutions and make recommendations based on value. We offer objective analysis and recommendation.

A sample case history involves unacceptable harmonic distortion associated with an adjustable speed drive. The equipment manufacturer's recommended solution was priced at $200,000. RGLSolutions recommendation for mitigation was priced at $50,000.

Roger G. Lawrence Selected Publication:

Specification Guidelines to Improve Power Quality Immunity and Reduce Plant Operating Costs