White Papers

Improving Unit Startups to Reduce Cost and Improve Heat Rate: Application Results

This project sought to evaluate the ability of CLPM technology to accurately identify underperforming PID control loops and to assess the effect of PID controller tuning on a plant’s startup operations and heat rate. Analysis was conducted on both a 550-Megawat combined cycle gas-fired unit...

Improving Unit Startups through Control Loop Performance Monitoring

This project evaluated the ability of control loop performance monitoring (CLPM) technology to both identify and characterize issues that impede the efficiency of plant operations during startup. In particular, the project focused on quantifying the effects of control loop tuning, mechanical, and loop interaction issues on startup efficiency. Analysis was conducted on a 550-Megawatt combined cycle gas-fired unit from June 15,...

Innovations in Plant-Wide Monitoring, Diagnostics & Optimization

Here’s the problem: The typical paper mill operates 100s of PID control loops and maintains an even larger quantity of production assets. The typical plant historian stockpiles data, and extracting information that’s actionable and relevant to performance can be a challenge. Meanwhile, pressure just increased...

Evolving Best-Practices Through Simulation-Based Training: Training The Field Operator Of The Future

Simulators are widely recognized as essential to process control training as they facilitate the propagation of a company's standard operating procedure (SOPs). According to process industry estimates, nearly $8 Billion in annual losses are due to human error. A significant part of these losses are attributed...

Improving Unit Startups to Reduce Cost and Improve Heat Rate: Enhancing Startup Efficiency through Improved Control Loop Performance

The project assessed the potential benefits of control loop performance monitoring (CLPM) technology relative to the identification of unit and equipment control issues that negatively affect unit startup efficiency and heat rate. The project utilized CLPM technology during numerous unit startups performed at a single...

Reducing Energy Cost Through Improved Disturbance Rejection

Two of the most popular architectures for improving regulatory performance and increasing profitability are 1) cascade control and 2) feed forward with feedback trim. Both architectures trade off additional complexity in the form of instrumentation and engineering time for a controller better able to reject...

Model-Based Tuning Methods For PID Controllers

The manner in which a measured process variable responds over time to changes in the controller output signal is fundamental to the design and tuning of a PID controller. The best way to learn about the dynamic behavior of a process is to perform experiments,...

Demystifying Performance Assessment Techniques

Real-time performance monitoring to identify poorly or under-performing loops has become an integral part of preventative maintenance. Among others, rising energy costs and increasing demand for improved product quality are driving forces. Automatic process control solutions that incorporate real-time monitoring and performance analysis are fulfilling...

Modeling Non-Steady State Data for PID Controller Tuning in a Cogeneration Power Plant

A 25 MW combined-cycle cogeneration plant at the University of Connecticut supplies electricity to the entire UConn campus with three natural gas combustion turbine generators and one high pressure steam turbine generator. Low pressure steam is used to provide building heat in the winter and...