Design, Development and Testing of a DSP Based Dynamic Voltage Restorer

The paper describes the design, development and testing of a three phase prototype Voltage Source Inverter (VSI) as part of the Superconducting Magnetic Energy Storage (SMES) system technology development at Variable Energy Cyclotron Centre (VECC), Kolkata. Following a Dynamic Voltage Restorer (DVR) topology the paper details the electrical aspects of the design and the mathematical model thus formulated. The block diagram of the digital control, implemented by a fixed point DSP based controller (DSC) has been explained with reporting of the test results on a nominal load. A generalized formulation has been attempted so as to allow designers to utilize it for future applications.