To　improve　the　low　voltage　ride　through(LVRT)　capability　on　double　fed　induction　generator(DFIG),　we　developed　a　double　closed-loop　feedback　control　strategy　combining　voltage　outer　loop　with　current　inner　ring　on　the　basis　of　STATCOM,　and　verified　its　effectiveness　through　simulation.　In　the　simulations,　STATCOMs　were　respectively　installed　at　the　terminal　of　wind　generator,　the　high　voltage　side　and　the　low　voltage　side　of　common　coupling　point.　And　then　different　depths　of　voltage　drop　were　added　to　the　grid,　and　different　compensation　effects　were　compared　and　discussed.　Experimental　results　suggest　that　the　compensation　effect　is　the　best　when　STATCOM　is　installed　at　the　wind　generator　terminal.　When　the　voltage　drops,　STATCOMs　can　provide　power　grid　with　reactive　power　quickly,　raise　the　voltage　of　the　wind　turbine　generator,　and　improve　the　LVRT　capability　of　wind　farms.　In　the　aspects　of　STATCOM　output　reactive　power　and　rising　percentages　of　wind　farm　terminal　voltage,　the　compensation　effect　of　STATCOM　is　significant　for　different　depths　of　voltage　drop.　©　2016,　Chongqing　Medical　University.　All　right　reserved.