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IMPROVEMENT OF TRANSIENT VOLTAGE STABILITY OF THE WIND FARM USING SVC AND TCSC ABSTRACT Wind power is important distributed renewable energy resources. However, voltage stability issues with wind farms may require such systems to be augmented with reactive power compensation devices. The development of wind power technology could face the risk of being stopped if measures are not taken to ensure the stability and reliability of the power system. Low Voltage Ride through (LVRT) has emerged as a new requirement that system operators demand to wind turbines. In this paper Static VAR Compensator (SVC) and thyristor controlled series compensator (TCSC) are used to improve Transient Voltage Stability of the asynchronous wind farm. SVC has a significant contribution to the transient voltage stability of wind power system. When the wind speed changed dramatically, SVC can maintain the terminal voltage and ensure the system running continuously.TCSC is effective in enhancing the transient stability of wind power system. With the TCSC, the fault current is limited effectively while the voltage stability is also improved, then the terminal voltage is raised to the rating after the fault is cleared. The related structure model of the wind farm power system is built in Matlab / Simulink. The contributions of SVC and TCSC to Transient Voltage Stability of the asynchronous wind farm and power grid are verified by the simulation. The result shows that: when the wind speed is in random fluctuation, SVC can offer reactive power to maintain the transient stability, in addition, when three-phase short circuit happens in the wind farm integrated place of power grid, TCSC can promote the terminal voltage, and improve the low voltage ride-through capability effectively. Head office: 2nd floor, Solitaire plaza, beside Image Hospital, Ameerpet, Hyderabad www.kresttechnology.com, E-Mail : [email protected] , Ph: 9885112363 / 040 44433434 1 BLOCK DIAGRAM: DESIGNG SOFTWARE AND TOOLS: MATLAB /SIMULATION Software and Sim Power Systems tools are used. Mainly control system tools, power electronics and electrical elements tools are used. Head office: 2nd floor, Solitaire plaza, beside Image Hospital, Ameerpet, Hyderabad www.kresttechnology.com, E-Mail : [email protected] , Ph: 9885112363 / 040 44433434 2