POWER QUALITY IMPROVEMENT OF NOVEL PWM BASED 15 LEVEL INVERTER FOR MODIFIED UNIFIED POWER QUALITY CONDITIONER (UPQC)
Keywords:Pulse Width Modulation (PWM), Multilevel Inverter (MLI), Power Quality (PQ), Voltage Sag, Shunt and Series Controller
The unified power quality conditioner (UPQC) is a traditional power device, which mitigates the voltage and current related PQ problems in the power distribution systems. In this paper describes the UPQC topology for an application with non-stiff source is proposed. The proposed topology enables UPQC to have a reduced harmonics. Here, the unified power quality conditioner (UPQC) deals with a solution to compensate the voltage sags and swells and to protect sensitive loads. In order to apply the MLI consists of fifteen levels inverter in the distribution systems with voltage in range of kilovolt, series converter as one of the important component of UPQC should be implemented based on the multilevel converter which have the capability to handle voltage in the range of kilovolts and power of several megawatts. Hence, the proposed configuration of UPQC based on asymmetrical cascade Multicell converters for power quality analysis. The main property of this asymmetrical CM converter is to increase the number of output voltage level with reduced number of switches. Also, in order to achieve the pre-sag compensation strategy and the voltage sag/swell detection with verified the simulation results under Matlab/Simulink platform.
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