As for the active margin reduction and voltage instability of power system due to wind farm ac-cess

it can be improved by adding reactive power compensation device. With consideration of both the costand response speed of the reactive power compensation equipment at the same time

a kind of combined re-active power compensation proposal with consideration fast continuity of static var compensation（SVC）with low cost and high power of parallel capacitor

and the coordination control strategy between the paral-lel capacitor and SVC is designed. Modeling and flow analysis for the grid in Hami area are made by the useof DIgSILENT power simulation software

the weak point of the wind farm in the area is found out

then thestatic stability limit without adding reactive power compensation device

adding parallel capacitor

addingSVC and adopting combined reactive power compensation in the area are compared. It is shown by the simula-tion result that use of combined reactive power compensation proposal can not only meet wind power trans-mission requirement

but also improve static stability limit of system and have a definite practical value.