International School on Nonsinusoidal Currents and Compensation 2013 (ISNCC 2013) is continuation, in reorganized form, of the former School on Nonsinusoidal Currents. It was hold forthe first time in 2008 as ISNCC 2008 and next in 2010 as ISNCC 2010. Systems with nonsinusoidal voltages and currents (NSV&C) shall be the focus area of the conference and in particular, power properties of such systems, compensation, identification,modeling, smart instrumentation, power electronics, supply and loading qualities, as well as energyaccounts in systems with NSV&C. Three issues would be the leading subjects of the School: - Powers and compensation in Smart Grids. - Power Electronics – cause and remedy for distortion in distribution systems. - Advanced Metering Infrastructure (AMI) – a tool for rationalization of energy use. The Conference shall provide a forum for presentation of new ideas and research results as well asan opportunity for a transfer, through tutorials, of the existing knowledge on systems with NSV&C tothe younger generation of engineers and researchers. The conference shall provide an opportunity for discussion and exchange of experience between theoreticians, practitioners, experienced and beginner scientists interested in systems with NSV&C as well as researchers interested in smart grids and AMI-oriented smart instrumentation development, having in mind that voltages and currents inpresent-day systems are usually nonsinusoidal and often asymmetrical. Half of the conference time shall be devoted to tutorials on systems with NSV&C.