PJM instructs you to increase MVAR output for voltage support by 50 MVAR. What is your next step?

The appropriate next step when PJM instructs you to increase MVAR output for voltage support by 50 MVAR revolves around the relationship between real power (MW) and reactive power (MVAR). Increasing MVAR output generally involves shifting the generator's operating parameters.

When you decrease MW output, the generator can operate at a higher reactive power output. This is because the generator can absorb or produce reactive power in response to the needs of the electrical system. In essence, reducing the real power output allows the generator to free up capacity to provide additional reactive power, thus fostering voltage support.

Maintaining the MW output would not allow for the additional MVAR capability requested, while increasing MW output would likely decrease reactive power capabilities, which counteracts the request for an increase in MVAR. Shutting down the generator is not a practical response in this context, especially when the goal is to provide more reactive power for voltage support. Therefore, decreasing MW output to increase reactive capability aligns with standard operational practices within the scope of power system management.