What is typically a role of the Load Tap Changer transformers in a power system?

Load Tap Changer (LTC) transformers play a crucial role in managing and optimizing voltage levels within an electrical power system. The primary function of the Load Tap Changer is to regulate the output voltage of the transformer by adjusting the turns ratio in response to load conditions. This capability is essential in maintaining the voltage within desired limits, ensuring that all consumers receive stable and appropriate voltage levels for their needs.

By optimizing voltage levels, Load Tap Changers help to enhance the efficiency and reliability of the power system. They automatically sense variations in load and adjust accordingly, which is particularly important during peak demand times or in situations where voltage fluctuations might occur due to changes in supply or load conditions. This leads to improved overall performance and stability of the electrical grid, minimizing the risk of voltage-related issues that could affect equipment and end users.

The other options do not align with the primary function of Load Tap Changer transformers. The adjustment of the power angle relates more directly to synchronous generators and their operation within a power system rather than focusing on voltage management. Storing electrical energy pertains to devices like batteries or capacitors, while increasing generator output is related to the generation capacity itself rather than voltage regulation, which is the key role of Load Tap Changers.