MVAR production can be influenced by which of the following actions?

MVAR (Mega Volt Ampere Reactive) production, which relates to reactive power in an electric system, can significantly be influenced by placing a high voltage transmission line in service or taking one out of service. High voltage transmission lines are critical in transporting electrical power efficiently over long distances and also carry reactive power.

When a high voltage transmission line is placed in service, it can greatly enhance the ability of the network to transfer reactive power. This is due to the fact that high voltage lines reduce line losses and can provide a path for reactive power to flow, thereby affecting the overall reactive power balance in the system. Conversely, taking such a line out of service can lead to a decrease in the system’s ability to transfer reactive power, potentially leading to voltage stability issues and requiring compensatory actions to maintain the desired levels of reactive power.

The influence of reactive resources, such as capacitors or synchronous condensers, is also crucial for managing MVAR production; however, they are not the direct actions that involve the high voltage transmission lines as indicated by the question. Hence, while other options may reference factors influencing reactive power, placing or removing a high voltage line has a direct and observable impact on MVAR production in a power system.