Maintenance Technology April 2016 - (Page 21)
RELIABILITY & SAFETY
Loadability
Studies Aid
PRC-025-1
Compliance
While Bulk Electric System powergeneration facilities have until
2019 to conform to the PRC-025-1
standard, early adopters can begin
capturing a range of benefits now.
Jane Alexander, Managing Editor
IN AUGUST 2003, an electric power
blackout across the northeast United
States and Ontario, Canada, affected an
estimated 50 million people. Analysis of
this and other major disturbances over
the past 25 years has revealed generators
tripped for conditions that did not pose
a direct risk to those units and associated
equipment.
As a result, the North American
Electric Reliability Corp. (NERC), Atlanta,
created the PRC-025-1 Generator Relay
Loadability Standard. According to
Steve Nollette, supervising engineer for
Emerson Network Power's Electrical Reliability Services, Columbus, OH, the intent
of the standard is to increase grid stability
during system disturbances by reducing
unnecessary tripping of generators or the
number of "misoperations" caused by
incorrect settings, logic, or design errors.
The Federal Energy Regulatory
Commission (FERC), Washington,
has launched a campaign designed to
reduce misoperations by 25%, including
implementation of standardized setting
methodologies such as PRC-025-1, which
is currently enforceable.
Bulk Electric System (BES) generation facilities, according to the NERC
definition, are required to conform to
PRC-025-1 by October 2019. Nollette
explained that, while this seems like ample
time, facilities should begin planning a
loadability study now to reap the following
benefits associated with early adoption
and, thus, avoid the costly consequences of
delay or noncompliance.
Better access to engineering resources.
As regulatory requirements governing
operations continue to change, single
generation sites that operate with limited
engineering resources may need assistance
from external or outsourced resources
such as contractors, who can perform
the highly technical tasks needed to meet
the new regulatory requirements. While
multi-site generation entities often already
utilize an engineering team specializing in
matters pertaining to NERC compliance,
they may also need assistance due to the
volume of work related to analyzing,
implementing, and testing all of their
protective relays.
"The economic laws of supply and
demand dictate that, as a deadline
approaches and more generation plants
rush to seek out contract assistance,
the available supply of contractors and
engineering firms will dwindle," Nollette
said. "This translates into higher costs and
potentially lower quality. Early adopters
will have access to greater engineering
resources at lower costs."
Less business interruption. For
generation sites that have completed a
system assessment and require changes to
the load-sensitive protective relay settings,
implementation and testing will need to
be scheduled, requiring a maintenance
outage. When a loadability study is
performed earlier, there is a greater ability
to schedule the implementation and
testing during a planned outage rather
than having to schedule a separate main-
Above. Regulatory requirements governing Bulk Electric System (BES) power-generation owners and operators are expected to
significantly increase the volume of work related to analyzing, implementing, and testing protective relays at sites.
APRIL 2016
MAINTENANCETECHNOLOGY.COM | 21
http://www.MAINTENANCETECHNOLOGY.COM
Table of Contents for the Digital Edition of Maintenance Technology April 2016
My Take
Uptime
On The Floor
Culture Changed At This Indiana Refinery
She Ignores The Glass Ceiling
Loadability Studies Aid PRC-025-1 Compliance
Look System-Wide For Cost Savings
Reliable Pumping Supplement
Fund Lubrication Program With Energy Savings
Emergency-Stop Choices
Cyber Security
Backup Generators
Infrared Safety Tips
Internet Of Things
ISO 55000
Motor-Testing Tools Expand Services
Products
Showcase
Ad Index
Final Thought
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