how to represent shunt capacitors as constant power source(Var injection)

[karthikai dharma]

Dear sir,
How to represent shunt capacitors as constant power source (var injection) in 
matpower
yours

D.Karthikaikannan
Associate Professor GrI,
Department of Electrical and Electronics Engg
Indra Ganesan College of Engg,
TamilNadu
INDIA