Power Losses and Voltage Drop Compression for a Transmission Line in Syrian Network in Case of Using HVAC or HVDC Transmission Lines

Abstract

The value of the resistance, impedance and capacitance of a double circuit high voltage AC transmission line 400kV, have been recalculated. This line normally connecting Hama 400kV substation to Aleppo 400kV substation. A comparison was done between these values and the values presented by the ministry of Electricity in Syria. Based on this data, a simulation has been done of the high voltage AC transmission line using NEPLAN program, then the Losses and the voltage drops along the line have been deduced.  On the other hand, using the same values of the transmitted power and line parameters are used for a high voltage direct current HVDC transmission line working at 500kV. As a result the power losses and voltage drops have been obtained again, which permits us to do a realistic comparison between AC and DC transmission lines, since the power losses and the voltage drops are less in the HVDC system, which gives us the advantages to use HVDC transmission lines instead of AC lines in future. From the obtained results we notes that the HVDC system  increases  the stability of the busbars voltages and the stability of generation stations and  substations, and gives the ability to control the transmitted power, without effecting the changes happened  in frequency and busbars  voltages.