With the new stage of energy transition in progress, the key tendency of power market development today is distributed power generation, which is characterized by decentralization, smart energy systems, involvement of consumers, and a higher share of renewable energy sources. In the distributed generation systems, electricity comes from a number of local power objects, instead of one large station. For example, house owners that use solar panels can sell excessive amounts of electricity.
A fundamental role in these systems belongs to inverters that convert the generated electricity into the alternating current with specific frequency. In Europe and CIS countries, it equals 50 Hz. Researchers from Skoltech presented an algorithm for inverters that aims to control the quality of electricity injected to the main grid. The results are spotlighted by IEEE.
“Inverters are programmed with mathematical functions and equations with certain coefficients,” explains the leading author of the research Ilya Veretennikov, an engineer in the Energy Center’s Smart Grid Laboratory. “If grid parameters remain the same, it is enough to adjust the coefficients just once. Energy systems with distributed (local) generation constantly change (for example, if some market participants stopped selling their electricity), coefficients need to be recalculated. It is difficult to evaluate whether the coefficients are calculated correctly or not, but it is necessary to ensure the quality of electricity, which must meet the standard. Otherwise, it cannot be injected into the grid.”