7Akagi H, Kanazawa Y. Instantaneous reactive power compensators comprising switching devices without energy storage components. IEEE Transaction on Industry Applications, 1984 ;20(3 ) ,625630.
8Singh B, A1-Haddad K, Chandra A. Active power filter for harmonic and reactive power compensation in three-phase, flint-wire systemssupplying non-linear loads. ETEP, 1998;8 (2), 139145.
9Chen C L, Lin C E, Huang C L. Reactive and harmoine current com- pensation for unblanced three-phase system using the synchronous detection method. Electric Power Systems Research, 1993; 26, 163170.