Controls upgrade for integrated plantwide controls & information
Conference
·
OSTI ID:405641
Like many utilities today, Texas Municipal Power Agency (TMPA) needed to upgrade its obsolete controls. The cost justification required improvements in operations, maintenance and performance. To achieve these objectives, a project plan was developed in 1992 for a three-year phased installation of a Distributed Control System (DCS) platform for the main plant controls with Programmable Logic Controls (PLCs) for the plant and yard auxiliaries. The existing plant controls, with isolated PLC controls and hard-wired operator interface, could not interconnect. It was determined that operation and maintenance costs could be reduced by installing an {open_quotes}open{close_quotes} distributed control system. An {open_quotes}open{close_quotes} system would provide operating, maintenance, and engineering information to any CRT on the plant site, reduce man-hour requirements, and improve predictive and preventive maintenance benefits. The 1970s electronic controls could not be maintained for optimal tuning. In addition, any configuration changes to optimize control were difficult to implement. New boiler and heat cycle controls would improve plant heat rate through tighter control of the process variable set points.
- OSTI ID:
- 405641
- Report Number(s):
- CONF-951208--
- Country of Publication:
- United States
- Language:
- English
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