Undersea cables, where high capacitance causes additional AC losses. (e.g., 250 km Baltic Cable between Sweden and Germany the 600 km Nor Ned cable between Norway and the Netherlands, and 290 km Bass link between the Australian mainland and Tasmania) Endpoint-to-endpoint long-haul bulk power transmission without intermediate 'taps', for example, in remote areas Increasing the capacity of an existing power grid in situations where additional wires are difficult or expensive to install Power transmission and stabilization between unsynchronized AC distribution systems Connecting a remote generating plant to the distribution grid, for example Nelson River Bipole Stabilizing a predominantly AC power-grid, without increasing prospective short circuit current Reducing line cost. HVDC needs fewer conductors as there is no need to support multiple phases. Also, thinner conductors can be used since HVDC does not suffer from the skin effect Facilitate power transmission between different countries that use AC at differing voltages and/or frequencies Synchronize AC produced by renewable energy sources Electrical & Electronics Engineering, FISAT 5 HVDC TECHNOLOGY AND SHORT CIRCUIT CONTRIBUTION OF HVDC LIGHT Long undersea / underground high voltage cables have a high electrical capacitance, since the conductors are surrounded by a relatively thin layer of insulation and a metal sheath while the extensive length of the cable multiplies the area between the conductors. The geometry is that of a long co-axial capacitor. Where alternating current is used for cable transmission, this capacitance appears in parallel with load. Additional current must flow in the cable to charge the cable capacitance, which generates additional losses in the
Undersea cables, where high capacitance causes additional AC losses. (e.g., 250 km Baltic Cable between Sweden and Germany the 600 km Nor Ned cable between Norway and the Netherlands, and 290 km Bass link between the Australian mainland and Tasmania) Endpoint-to-endpoint long-haul bulk power transmission without intermediate 'taps', for example, in remote areas Increasing the capacity of an existing power grid in situations where additional wires are difficult or expensive to install Power transmission and stabilization between unsynchronized AC distribution systems Connecting a remote generating plant to the distribution grid, for example Nelson River Bipole Stabilizing a predominantly AC power-grid, without increasing prospective short circuit current Reducing line cost. HVDC needs fewer conductors as there is no need to support multiple phases. Also, thinner conductors can be used since HVDC does not suffer from the skin effect Facilitate power transmission between different countries that use AC at differing voltages and/or frequencies Synchronize AC produced by renewable energy sources Electrical & Electronics Engineering, FISAT 5 HVDC TECHNOLOGY AND SHORT CIRCUIT CONTRIBUTION OF HVDC LIGHT Long undersea / underground high voltage cables have a high electrical capacitance, since the conductors are surrounded by a relatively thin layer of insulation and a metal sheath while the extensive length of the cable multiplies the area between the conductors. The geometry is that of a long co-axial capacitor. Where alternating current is used for cable transmission, this capacitance appears in parallel with load. Additional current must flow in the cable to charge the cable capacitance, which generates additional losses in the
53681216-Seminar-Hvdc-Technology-and-Short-Circuit-Contribution-of-HVDC-Light.docx