This book constitutes the refereed proceedings of the SecondInternational Conference on Advances in Power Electronics andInstrumentation Engineering, PEIE 2011, held at Nagpur, India, in April2011.The 9 revised full papers presented together with 4 short papers and 7poster papers were carefully reviewed and selected from numeroussubmissions. The papers address current issues in the field of powerelectronics, communication engineering, instrumentation engineering,digital electronics, electrical power engineering, electrical machines,information technology, control systems, and the like.