Analysis of the Impacts on Power Flow After Introducing Renewable Energy Source in a Power System with HVDC Line

Abstract

In the power generation sector, renewable energy sources are getting popular with technological advancement and power engineers are trying to increase the power transmission capacity of a power system day by day. In an interconnected grid, both objectives can be achieved by installing a high voltage direct current (HVDC) transmission line and a wind power plant. Although the HVDC transmission system is costlier than AC transmission system, power transfer is easy and efficient. Wind power can create a problem because of the sizeable reactive power consumption of these machines, so both can hamper the stability of the power system if it is not designed correctly. For a stable power system, prior knowledge needed to design and to plan. This paper presents power flow analysis on Western Systems Coordinating Council (WSCC)-9 bus, three machine power systems without and with integrating wind farm and HVDC line. Power system analysis toolbox (PSAT) has been used for system design and simulation. After power flow analysis by using Newton–Raphson method changes in voltage magnitude, voltage angle, real and reactive power in various buses has been measured. Finally, a comparative study has shown that it is advantageous to add an HVDC link and wind farm together in a power system for better power flow efficiency and stability.