Power System Dynamics in Distribution Systems
May 28, 2018

Historically, in large electricity grids, generation is rarely found within the distribution system, but is rather connected remotely via a high voltage transmission network. With the trends seen in the transformation of the grid, generation embedded in the distribution system is now becoming the norm, rather than the exception, and can include wind, solar, and batteries, as well as conventional diesel and hydro-power units.

The power systems analysis for traditional distribution systems has focused on load flow and short circuit studies. Dynamic studies have typically not been required because the loads have a passive characteristic with little generation. However, distribution systems now supply an increasing amount of active loads such as adjustable speed drives, and also host generation, much of which is inverter connected. Consequently, there is now an increasing focus within distribution utilities on the dynamic behaviour of load and generation, both existing and prospective.

PSC’s Power Networks engineers have extensive experience in the modelling, analysis and planning of transmission and distribution networks, and we have developed a strong reputation with our clients. With an increasing demand for network analysis in the electricity distribution sector, PSC have a team ready to meet the requirements of these complex studies.

PSC’s team includes experts in power system dynamics, who are immersed in assessing how well both transmission and distribution networks maintain stability under disturbances. As an example, by carrying out dynamic simulation studies of electromechanical transients, we are supporting proponents and distribution utilities in assessing whether proposed new generation projects meet the stability criteria of Australia’s National Electricity Rules. PSC works closely with our clients to ensure all final reporting meets the applicable regulations, and we can also provide assistance with network connection applications or modifications.