High-Voltage Direct Current (HVDC) is a technology used to transmit electricity over long distances. Unlike traditional alternating current (AC), HVDC uses a constant voltage, which reduces energy loss during transmission. This makes it particularly useful for connecting renewable energy sources, like wind farms and solar power plants, to the grid. HVDC systems consist of converters that change AC to DC and vice versa. They can efficiently transport electricity between different regions, even if they operate at different frequencies. This capability enhances grid stability and allows for better integration of diverse energy sources into the electrical network.