01-12-2012, 01:38 PM
POWER QUALITY ISSUES, PROBLEMS, STANDARDS & THEIR EFFECTS IN INDUSTRY WITH CORRECTIVE MEANS
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ABSTRACT
Latest innovative ideas to make the life easier using the technology depends upon the application of power
electronics in turn about power quality. With increasing quantities of non-linear loads being added to electrical
systems, it has become necessary to establish criteria for limiting problems from system voltage degradation.
This paper presents the power quality problems, issues, related international standard, effect of power quality
problem in different apparatuses and methods for its correction, which is actually a technology management. This is
important for design engineers and researchers in power quality to know the international standards used for power
quality.
INTRODUCTION
The paper and the technology on which it is grounded are largely motivated by the power quality issues.
The term power quality is rather general concept. Broadly, it may be defined as provision of voltages and
system design so that user of electric power can utilized electric energy from the distribution system
successfully, without interference on interruption.
Power quality is defined in the IEEE 100 Authoritative Dictionary of IEEE Standard Terms as The
concept of powering and grounding electronic equipment in a manner that is suitable to the operation of
that equipment and compatible with the premise wiring system and other connected equipment Utilities
may want to define power quality as reliability [8].
From the Power Quality market or industry perspective, it is any product or service that is supplied to
users or utilities to measure, treat, remedy, educate engineers or prevent Power Quality issues, problems
and related items [6,8,12,13,15,23,28].
This paper critically discusses about the power quality problems, issues and related standards, assessment
of power quality issues and methods for its correction with giving a thorough knowledge of harmonics,
power quality indices, parameters effecting electric power etc.
POWER QUALITY PROBLEMS & ISSUES
A recent survey of Power Quality experts indicates that 50% of all Power Quality problems are related to
grounding, ground bonds, and neutral to ground voltages, ground loops, ground current or other ground
associated issues. Electrically operated or connected equipment is affected by Power Quality [9, 10,11, 12,
15, and 16].
Determining the exact problems requires sophisticated electronic test equipment. The following symptoms
are indicators of Power Quality problems:
• Piece of equipment misoperates at the same time of day.
• Circuit breakers trip without being overloaded.
• Equipment fails during a thunderstorm.