Title :
Lightning study of windfarm collector system
Author :
Rokkam, Venkatesh ; Munji, Kiran Kumar
Author_Institution :
Global R&D Centre, Crompton Greaves Ltd., Mumbai, India
Abstract :
This paper presents a numerical modeling and simulation of a lightning study of 115kV and 34.5kV overhead line (OH) connected to windfarm collector system. The electromagnetic transient program PSCAD/EMTDC is used to model and simulate the OH line and other substation equipment. Shielding failure and back flashover studies are performed to characterize the magnitude of the lightning overvoltages. The effect of variation in tower grounding resistance on lightning overvoltages is also analysed. Insulation requirements and protective ratios of main transformers, wind turbine generator (WTG) transformer and circuit breakers are verified with respect to voltage developed during lightning. The protective ratios are compared as per IEEE std C62.22-1997.
Keywords :
EMTP; circuit breakers; earthing; lightning; overvoltage protection; power overhead lines; shielding; substations; turbogenerators; wind power plants; wind turbines; IEEE std C62.22-1997; PSCAD/EMTDC; WTG transformer; back flashover; circuit breakers; electromagnetic transient program; lightning overvoltages; lightning study; overhead line; shielding failure; substation equipment; tower grounding resistance; voltage 115 kV; voltage 34.5 kV; wind turbine generator; windfarm collector system; Lightning; Poles and towers; Power cables; Power transformer insulation; Surge protection; Surges; Collector system; insulation coordination; lightning impulse; protective margin; windfarm;
Conference_Titel :
Harmonics and Quality of Power (ICHQP), 2014 IEEE 16th International Conference on
Conference_Location :
Bucharest
DOI :
10.1109/ICHQP.2014.6842758
