PRYSMIAN GROUP | 525 kV HVDC Power transmission as a function of technology 525 kV CABLE TECHNOLOGY, A STEP FURTHER 1000 525 kV extruded - 70°C Copper Cross-section [mm2] Power [MW] 525 kV extruded - 90°C 320 kV extruded - 70°C 525 kV suitable for connections above 2GW 525 kV paper - 60°C 800 1000 1600 1400 1800 2600 2800 1200 1400 1600 1800 2000 2200 2400 2600 320 kV suitable for connections up to 1.3 GW 1200 2000 MORE EFFICIENT, RELIABLE, ECO-FRIENDLY POWER TRANSMISSION Prysmian Group launched the new 525 kV HVDC cable technology, making a significant step forward towards more efficient, reliable and eco-friendly power transmission. 525 kV extruded land cable systems are qualified with two different insulation materials, P-Laser and XLPE. They are both designed to operate at very high electrical stresses and are tested with large conductor cross-sections to maximize power transmission over long distances with minimized land use. For example, the ±525 kV technology uses less cable to transmit the same power compared to classic 380 kV AC systems. This is reflected in less construction efforts when installing the cables and narrower trench widths. P-Laser also benefits from a higher operating temperature than classic HVDC systems at 320 kV, further increasing its power transmission capacity. Calculated in ambient conditions with soil thermal resistivity of 0.8 mK/W, ambient temperature of 18°C, burial depth of 1.5m and cables installed in bundle
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