What is a primary benefit of using DC transmission circuits for long distances?

The primary benefit of using DC transmission circuits for long distances is higher efficiency. In DC transmission, power losses associated with reactive components, such as capacitance and inductance, are significantly reduced compared to AC transmission. This is because direct current does not experience the same phase shift issues that alternating current does, which leads to lower losses over long distances due to resistive elements in the conductors. Consequently, DC transmission systems can deliver more usable power to end-users with fewer losses, making it a preferred choice for long-distance energy transfer applications.

While other factors like insulation requirements, installation costs, and maintenance can play a role in the overall evaluation between AC and DC transmission, they do not capture the same level of fundamental efficiency advantages that direct current offers for long-range transmission.