Global ROC Enhances Power Plant Efficiency by Implementing Automatic Generation Control (AGC) for Power Plant in Texas

The Challenge

A power plant with three 501F Gas Turbines and one Steam Turbine faced operational constraints with its Automatic Generation Control (AGC) system. The original AGC setup imposed limitations:

  • Megawatt Synchronization: Gas turbines needed to be within 15 Megawatts of each other for AGC control.
  • Setpoint Bias Dependency: A Megawatt setpoint bias was crucial, without which AGC risked over or under-generating by over 5 Megawatts.
  • Inflexibility in Configuration: Adding or removing units from AGC required turning off AGC, causing disruptions.
automatic generation control

Our Solution

Global ROC introduced a transformative overhaul of the AGC system, enabling:

Flexible Inclusion: AGC inclusion for a gas turbine once NOx emissions met compliance, independent of other units' current generation.

Precision Setpoint Control: AGC controlled with a 0.2 Megawatt setpoint, allowing seamless addition or removal of units without disruption.

Individual Load Restriction: Units could be load-restricted without affecting the entire power plant output.

Smart Logic Integration: Logic added to bring the gas turbine on AGC to minimum load in case of a steam turbine trip, with AGC automatically turning off once at minimum load.

Project Results


The AGC transformation delivered substantial improvements:

Efficiency Boost: AGC became more efficient and user-friendly.

Operational Simplicity: Operation graphics were updated and simplified for enhanced usability.


Global ROC executed a comprehensive redesign, addressing the AGC system’s intricacies with innovative solutions.

Discover how Global ROC’s AGC solutions can optimize your power plant’s performance. Unlock efficiency, flexibility, and operational simplicity. Take the first step towards streamlined AGC – Learn more about our tailored solutions today.