Plug-in hybrid electric vehicles and distributed generations in power systems: Effects and penetration level studies
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Typ
Examensarbete för masterexamen
Master Thesis
Master Thesis
Program
Electric power engineering (MPEPO), MSc
Publicerad
2010
Författare
Babaei, Saman
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Major part of this master thesis deals with impact of plug-in hybrid electric vehicles (PHEVs) on the power system. First a brief review of the technical challenges in the power system due to mass introduction of the PHEVs in the transmission sector is given. Then the Master thesis shows on an analysis of the overloading effects of PHEVs on the distribution system with normal charging and quick charging of PHEVs for an IEEE 13-node distribution test system using power flow analysis. The results of the study on the IEEE 13-node distribution test system show that introduction of PHEVs in the transportation sector will lead to overloading of distribution system and cause voltage problems at the end-users. Then the impact of PHEVs is tested on a real distribution network in Gothenburg. Two areas have been selected one commercial and one residential area. In the 400 V network, there is a few numbers of overloaded line due to PHEVs charging while the under voltage effect on the end users is negligible providing that voltage of main busbar set higher than 1 pu which is the real case. In the real sample 10 kV network in the Gothenburg, where, there are number of 10 to 0.4 kV substations that are supplying vehicles with required charging power besides their regular daily load, over loading of line is observed at peak load. Then maximum possible vehicles that can be charged without any violations in a reliable manner is calculated both for residential and commercial areas. The Master thesis also analyzes the effects of PHEVs in the transmission system, using one test transmission network (10-Bus transmission system) and the Nordic 32-bus test system. The study results show that the overloading problem is not prominent. Introduction specific penetration of vehicles leads to under voltage in the 10-Bus transmission test system, while one interesting and important result happens in the Nordic 32-bus test system and that is PHEVs may lead to over voltages in some buses in the transmission system which requires the voltage control measures. PHEVs would also lead to increased number of network violations in the contingency analysis. The Master thesis also analyzes maximization of the DGs penetration in the existing distribution networks. First a brief review of voltage rise effect in the networks equipped with DGs is given. Then this effect is simulated on the modified IEEE 13-Nodes test system and finally one nonlinear programming with GAMS is presented to maximize DGs penetration in the lightly load distribution network with Power curtailment as a solution to mitigate over voltage.
Beskrivning
Ämne/nyckelord
Elkraftteknik , Electric power engineering