Today, the generation and distribution of electrical power is becoming more sophisticated because of the scattered locations of the new renewable energy sources and consumer demands, like charging electrical vehicles. Micro-grids or smart grids, stability, and harmonics remain issues in these highly connected highways for energy.
Accurate generator modeling and power electronics modeling for VAR compensation and FACTS remain key issues. The extensive power systems library in Caspoc allows the modeling of harmonics and stability in small scale grids, like micro grids and islanding mode.
Stability and harmonics analysis for a small scale grid containing 16 photovoltaic energy sources. The model includes three-phase transformers, lines and loads. Harmonics injected by the photovoltaic converters are measured in the main grid.
The Active Front End can be modeled in detail with Voltage Oriented Control [VOC], controlling both P and Q simultaneously. In the simulation below a step in Q is made in the fourth period, resulting in lower currents. The DC link voltage remains constant at 700 volt.
