Space Vector Modulated Control for Electric Spring

Abstract

From last two decades owing to drastic rise in industrialization and modernization the generated power by conventional energy sources are insufficient to meet the increasing power demand. In order to overcome this major problem Non-conventional energy sources are penetrating in the power grid. The integration of these Non-Conventional energy sources causes fluctuations in the voltage and power of the entire grid. “Electric Spring” (ES)is a neoteric reactive power compensator, used to compensate the voltage and power of the grid. The heart of the Electric Spring is voltage source inverter(VSI). In order to switch the inverter different pulse width modulation(PWM)techniques are used. Considering, the attractive feature of space vector pulse width modulation technique(SVPWM)over other voltage controlled PWM schemes, this paper proposes an effective structure of space vector based Electric Spring with a huge potential in regulating the Alternating Current(AC)mains voltage, despite of the penetration of N on-Conventional energy sources. Also, the operation of Electric Spring in different operating modes are discussed. Further the paper describes a detailed comparison of Sinusoidal Pulse Width Modulation technique(SPWM)with Space Vector Pulse Width Modulation (SVPWM)for stabilizing the voltage and compensating the reactive power in the grid. The dynamic performance of the proposed structure of Space Vector based Electric Spring has been tested and demonstrated through detailed MATLAB simulation and validated using Experimental studies.