Abstract
In this paper; a new hybrid three phase four wire dynamic static compensator (3P4W DSTATCOM) is proposed for compensation of phase current harmonics; reactive power and neutral line current in three-phase four-wire electrical distribution system (3P4W). The proposed hybrid 3P4W DSTATCOM is consists of a neutral line current compensator and a 3P3W DSTATCOM. The hybrid DSTATCOM is realized by a 3P3W DSTATCOM and AC power capacitor is used for compensating the nonzero-sequence currents harmonic in the 3P4W distribution system. The 3P3W DSTATCOM is connected to the AC power capacitors; which results in reduction of rating of DSTATCOM. The neutral line current compensator is connected in between the AC power capacitors and interfacing inductors of the 3P3W DSTATCOM to compensates the source neutral line current in the 3P4W distribution system. AC power capacitors cause drop in voltage of3P4W DSTATCOM; the power rating of the 3P4W DSTATCOM is reduced. Therefore; the proposed hybrid 3P4W DSTATCOM can effectively reduce the volt-ampere rating of passive and active components of the system. A MATLAB simulation of proposed 3P4W DSTATCOM is carried to study the performance characteristics under different voltage condition.
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