While both systems are used for bulk power transmission, their applications differ significantly based on distance and technical requirements.
| Feature | HVAC (High Voltage Alternating Current) | HVDC (High Voltage Direct Current) |
| Primary Use | Short-to-medium distance power transmission and interconnections within a grid. | Long-distance transmission, submarine/underground cables, and asynchronous interconnections. |
| Power Losses | Higher due to charging currents, inductance, and skin effect. | Lower, with no reactive power losses. |
| Cost | Lower terminal/converter station cost but higher line costs over long distances. | Higher terminal/converter station cost but lower line costs, making it more economical for long distances (>600km). |
| Conductors | Requires three conductors per circuit. | Requires two conductors per circuit. |
| Stability | Less stable for long-distance transmission and complex grid interconnections. | Provides better stability and can link unsynchronized AC grids. |
Our OHTL stringing equipment is essential for building and maintaining both HVAC and HVDC overhead lines, providing the one-stop solution you need for any project.