Inertia in inverter-dominated power networks.

Séminaire le 13 Octobre 2017, 15h00 à CentraleSupelec (Gif-sur-Yvette) Salle du conseil du L2S - B4.40
Pooya MONSHIZADEH (PhD student at University of Groningen, The Netherlands)

Along with the emergence of the renewable energy sources in power networks, and consequently the increasing usage of power converters, new issues and concerns regarding stability of the grid have arisen. Recently, the problem of low inertia of inverter dominated systems has been extensively investigated. In this talk, I address the problem of stability and frequency regulation of a recently proposed inverter. In this type of inverter, the DC-side capacitor emulates the inertia of a synchronous generator. First, I discuss remodeling the dynamics from the electrical power perspective. Using this model, it can be shown that the system is stable if connected to a constant power load, and the frequency can be regulated by a suitable choice of the controller. I elaborate the analysis of the stability of a network of inverters with capacitive inertia, and show that frequency regulation can be achieved by using an
appropriate controller design.