Controller adds new system capabilities and enhances operational flexibility
This article describes how a new sootblower controller is helping Northern Indiana Public Service Company`s (NIPSCO`s) plant operators to more accurately control steam pressure and sootblower operations. The old controller system used pneumatic PID controls (single-loop controllers) to actuate the pressure reducing valves (PRVs). Steam, at 450 psi, was fed from either or both of the plant`s primary and secondary lines into the soot blowing system. Unfortunately, the old controller had several drawbacks one of which it did not offer a pressure readout. As a consequence, the operators had no local control of the system. It also did not indicate which source was supplying the steam. Furthermore, system changes were made difficult by its proprietary assembly code software. Because the old system was difficult to operate, required external resources for modification of the software, and as integrating the plant`s management information system (MIS) was not feasible, it was decided to replace the control system.
- OSTI ID:
- 61224
- Journal Information:
- Power Engineering (Barrington), Vol. 99, Issue 5; Other Information: PBD: May 1995
- Country of Publication:
- United States
- Language:
- English
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