GE TPO incorrect operation

Understanding the GE TPO turbine issue check

What is the purpose of the turbine issue check?

• TPO is a GE-specific feature in which the minimum pitch angle is adjusted twice a year to increase AEP. 
• The purpose of TPO is to account for changes in density and stall as a function of temperature and wind characteristics. 
• GE determines these settings through a series of experiments when the turbines are installed. 
• The GE TPO turbine issue check is to see if the function is operating as designed for a given turbine.

What does this look like / How do you identify this issue?

• The following is what TPO looks like when operating as expected

• When TPO is not operating as expected, the minimum pitch behavior is inconsistent
• Common behaviors include the minimum pitch angle is never adjusted, or the adjustments occur more than twice a year.