220 V 20 KV IGBT based voltage stabilizer

We have got a requirement to design, develop and prototype a IGBT stabilizer. Please see the specification for the same below Working Principle High frequency (20kHz) IGBT(Insulated Gate Bipolar Transistor) driven PWM voltage conversion through DSP Rated Capacity- 20kVA Single Phase Input Voltage Nominal: 230V AC, Single Phase Normal Operating Range: +/- 20 %,Single Phase Input Frequency - 45-65 Hz Output Voltage Nominal: 230V AC ±1%, Single Phase Output Frequency: Same as Input Output Voltage Regulation Within ±1%Waveform Same as Mains Input at both Input and Output Power Efficiency- Minimum 96%Input MCB- Rated capacity of 50 A Connection Terminals Line, Neutral and Ground at both Input and Output Correction Speed: Less than 20 milliseconds Response Time :50μsSystem Status Monitoring LCD Display for showing the stats like AC Input, AC Output, Load etc and any error Operating Temperature: 0-50° C Cooling Natural or forced (by the use of fan) :Air cooling Protections· Class minimum IP-20 · Cutoffs for Overload, Under voltage, Overvoltage and Short Circuit · Soft Switch ON · Surge Protection upto 8kVDisplay Digital Display of input and output voltages Automatic Trip feature enabled in the event of input voltage higher than 290 V (Phase neutral ) or 500 V (Line-Line) and Restart Class H insulation for Galvanic Components