Impact Assessment of Integrating Thermostatic Loads and Plug-in Electric Vehicles in Future Low Voltage Distribution Grids
Authors
Bjerregaard, Peter Thais ; Szczesny, Ireneusz Grzegorz
Term
4. term
Education
Publication year
2013
Submitted on
2013-05-29
Pages
130
Abstract
Det danske elsystem står over for en krævende udvikling i de kommende år og årtier, fordi andelen af vindkraft øges. Når elproduktionen i højere grad afhænger af vejret og er mindre styrbar, må slutbrugere blive aktive medspillere i elsystemet. Denne omstilling kaldes ofte efterspørgselsstyring (demand side management). Elbiler og varmepumper forventes at kunne levere meget fleksibelt forbrug. Dette speciale undersøger effekten af at indføre disse enheder i to forskellige lavspændingsnet i et 2025-scenarie. Enhederne er modelleret i DIgSILENT PowerFactory DSL, et simuleringsværktøj til elsystemer. En flerlaget styrestrategi anvendes til at koordinere enhederne, så de kan forbedre spændingsniveauerne i svage net (områder med tendens til spændingsproblemer) og gøre det muligt for fremtidige aggregatorer (aktører, der samler og styrer mange små enheder) at levere balanceringstjenester til TSO (transmissionssystemoperatøren).
The Danish power system is set for a demanding transition in the coming years and decades as the share of wind power increases. Because wind is weather‑dependent and less controllable, end‑consumers will need to become active participants in the power system, a shift often called demand side management. Electric vehicles and heat pumps are expected to offer significant flexible consumption. This thesis examines the impact of introducing these units in two different low‑voltage distribution grids in a 2025 scenario. The units are modeled in DIgSILENT PowerFactory DSL, a power system simulation tool. A multi‑layer control strategy is applied to coordinate the units so they can improve voltage levels in weak grids (areas prone to voltage issues) and enable future aggregators (companies that manage many small devices) to provide balancing services to the TSO (transmission system operator).
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