9SAUER P W, LESIEUTRE B C, PAI M A. Maximum Load-ability and Voltage Stability in Power Systemsl-J~. Electrical Power and Energy Systems, 1993,15(3) : 145-154.
10HAJAGOS L M,DANAI B. Laboratory Measurements and Models of Modern Loads and Their Effect on Voltage Stability [J]. IEEE Transactions on Power System, 1998,13(2) : 584-592.