Power electronics technologies for reliable operation of power systems in Japan

Microgrid field test projects in Japan are introduced in which distributed power generations including fuel cell, photovoltaic cell, wind power generation, gas engine, and battery energy storage are placed. Power leveling in the microgrid with support of high speed response is available utilizing power electronics technologies applied to these new energy power sources. Two examples of power electronics application to the renewable energy resources are presented in this paper. An inverter is one of common and basic equipments for dc type source of distributed power generations and will be important equipments for more reliable power systems. Although the modeling of conventional rotating generator has been developed and used in many network design and analysis stages, detailed modeling of inverter has not reported because there are many types of inverter in main circuit and in control. Then modeling of inverter on the EMTP is reported in this paper also for providing one of common model.