S7 is the latest fuel core that enables all previous and new software updates. These updates are designed to improve the reliability, availability, and performance of the gas turbine. The S7 software block change introduces improvements in Primary Frequency Control (PFC) for grid stability, new Dry Low Emissions (DLE) mapping capabiliites to reduce seasonal mapping needs, and additional trip reduction and reliability updates.

  • Meet Regulatory Requirements
  • Emissions
  • Availability
  • Reliability
  • Flexibility

The LM6000 S7 fuel core upgrade incorporates the following enhancements as compared to the S6 software block:

Cost Savings

  • NOX water scheduling optimization…2-3% water savings
  • SPRINT water savings…heat rate improvement at lower power settings
  • DLE mapping enhancements… Reduction or elimination of seasonal mapping requirements

Trip reduction and reliability improvements

  • Flame-out detection improvements… More robust flame-out detection during start up, range expanded to N25 > 500 RPM, reducing the risk of hung starts
  • HPC discharge temperature (T3) & T48 regulator improvement
  • Nuisance SPRINT* alarm removal
  • N25 MAX scheduling update…reach sync idle quickly & reliably
  • Improved alarm control logic that reduces false alarms
  • Improved control logic that reduces turbine trips to help increase plant revenue and efficiency

S7 enables the following optional performance improvements:

  • Primary Frequency Control (PFC)  incorporates advanced frequency control algorithms to meet requirements from many different grid authorities, allowing a temporary 2 MW bump for grid stability
  • Fast Start capability with <10min start
  • Peak Performance with throttle push, up to 5% higher output

How we get you there

  • The S7 core logic upgrade incorporates all current Software Action Requests (SARs) for LM6000 PC and PD engines
  • Optional performance enhancements, such as the <10 min Fast Start, may require additional hardware modifications.

Applicable Turbine Models

  • LM6000