A portion of a Reliability Coordinator Area is experiencing declining voltage and is running short on reactive reserves. Which Operating Instruction should the Reliability Coordinator give?

• A. Lower transfers across area and decrease generation
• B. Increase transfers across area and decrease generation
• C. Lower transfers across area and increase generation
• D. Increase transfers across area and increase generation

Answer: (C)

When a Reliability Coordinator identifies that a portion of its area is experiencing declining voltage coupled with a shortage of reactive reserves, the appropriate response is to lower transfers across the area and increase generation.

Declining voltage typically indicates a need for more reactive power support to help stabilize voltage levels. By lowering transfers across the area, the Reliability Coordinator can reduce the demand on the transmission system, which helps alleviate strain on the existing reactive resources. This means that less power is being transmitted from one area to another, reducing the likelihood of further voltage decline and overload in the transmission system.

Increasing generation serves to inject more reactive power into the system, which is crucial for voltage support. Generators can provide not only active power but also reactive power, which is essential for maintaining voltage levels. By increasing generation, the Reliability Coordinator can bolster the reactive power reserves, thus addressing both the voltage decline and the reactive reserve shortage.

This approach is vital for maintaining system reliability and preventing voltage collapse, ensuring that the system can continue to operate effectively.