TY - JOUR
T1 - Influence of partial undergrounding on the transient stability of EHV power transmission systems
AU - Khalilnezhad, Hossein
AU - Popov, Marjan
AU - Bos, Jorrit A.
AU - Jansen, Kees P.J.
PY - 2016/2
Y1 - 2016/2
N2 - This paper investigates the transient stability issues that may occur when long underground cables are added to EHV transmission systems. Dynamic behaviour of generators and terminal voltages with respect to various disturbances like cable disconnection/connection and fault currents are studied. Simulations are performed for the 2020 model of the Dutch transmission grid. The effects of partial undergrounding in two case studies with the total transmission length of 280 km are investigated. This work proposes criteria for accurate sizing of cable shunt compensation for dynamic simulation purposes based on grid voltages, generator reactive powers and power exchange with neighbouring grids. Moreover, a comparison between the dynamic behaviour of system variables for three different shunt compensation arrangements including line-end compensation, line-end middle compensation, and cable-end compensation is performed. Finally, a specific switching sequence for line disconnection/connection to improve voltage profiles and generator behaviours is introduced. The simulations are performed in PSS®E environment.
AB - This paper investigates the transient stability issues that may occur when long underground cables are added to EHV transmission systems. Dynamic behaviour of generators and terminal voltages with respect to various disturbances like cable disconnection/connection and fault currents are studied. Simulations are performed for the 2020 model of the Dutch transmission grid. The effects of partial undergrounding in two case studies with the total transmission length of 280 km are investigated. This work proposes criteria for accurate sizing of cable shunt compensation for dynamic simulation purposes based on grid voltages, generator reactive powers and power exchange with neighbouring grids. Moreover, a comparison between the dynamic behaviour of system variables for three different shunt compensation arrangements including line-end compensation, line-end middle compensation, and cable-end compensation is performed. Finally, a specific switching sequence for line disconnection/connection to improve voltage profiles and generator behaviours is introduced. The simulations are performed in PSS®E environment.
KW - EHV cables
KW - Cable length
KW - Shunt compensation
KW - Transient stability
KW - Mixed OHL–cable connection
KW - Flexible switching
UR - http://resolver.tudelft.nl/uuid://73ae7936-571c-4d98-b967-a03f209c72dd
U2 - 10.1016/j.epsr.2015.10.002
DO - 10.1016/j.epsr.2015.10.002
M3 - Article
VL - 131
SP - 126
EP - 138
JO - Electric Power Systems Research
JF - Electric Power Systems Research
SN - 0378-7796
ER -