Cell grid model: Minimum size power system with renewable energy

摘要

In recent years, renewable energy resource generators such as Photovoltaic generation (PV) is recently grown in resident area. New energy equipment such as a storage type heat pump water heater (HP-WH), an Electric Vehicle (EV), and LED lighting are increased rapidly. Consequently, it is seem that large amount inverter equipment will connect in a power system. Such equipments are consisting of power electronics techniques. It is possible that this equipment causes undesirable phenomenon (harmonic, voltage distortion and voltage unbalance) for an electric power quality. It is important that modeling of such equipments and effect of system stability connected such equipments. In this research, we focused on the modeling of renewable energy resources and the stability evaluation of the system including new equipments. We were modelized a Cell Grid with PV system and a load for problems of stability in the power system. In particular, we compared experimental to simulation results for system side stability. Additionally, we proposed and verified of control logic of Fault Ride Through (FRT) function for customer side stability. As a result, we confirm that difference of experiment and simulation results, and verified FRT function of a Power Conditioning System (PCS).