00495nam 2200157z- 450 9910712155303321(CKB)5470000002490559(EXLCZ)99547000000249055920230509c2019uuuu -u- -engModeling primary frequency response for grid studiesGolden, CONational Renewable Energy LaboratoryBOOK9910712155303321Modeling primary frequency response for grid studies3334253UNINA