Comparison of efficiency of Double Conversion UPS with LC, LCL and LCL with damping resistor filters

Technology advancement is currently rising at a rapid rate. This increases the demands for digital electronics industry in Malaysia. However, there is one issue when it comes to electronics, it is susceptible to power disturbance. Power disturbance can be categorized into six types which are transients, interruptions, undervoltage, overvoltage, waveform distortion and voltage fluctuations. In this study, an uninterruptible power supply (UPS) using double-conversion technique is presented due to its ability to provide adequate power conditioning and backup power in power disturbance situation. The simulation and designing of the converters such as rectifier, boost converter and inverter are presented using the MATLAB/Simulink. The simulation results showed that the UPS system was able to provide a continuous power supply with acceptable THD levels.