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Basic operational concepts of the single current source converter (CSC)-based STATCOM are studied in this paper. The space vector modulation scheme is adopted to control switching functions of the CSC. Capitalizing on anticipated new switch technology, the reduced-size LC filter is examined and design guidance is given. A filter current compensation method to reduce the error between command and response current is proposed under steady-state operation condition by use of phasor analysis. A loss compensation control is introduced that allows operation without a charging converter to maintain a desired value of current through the dc inductor. A DSP-based lab model is built to validate the concepts of the space vector modulated STATCOM and the control scheme proposed in this paper. The experimental results are satisfactory in that a low distortion line current results for steady-state operation. [Copyright &y& Elsevier]

The concept and impact of using a dedicated, current-based static VAR compensator (SVC) located at a generator bus to produce any required reactive power is examined. When relieved of the burden of reactive power production, the generator can then operate with an increased average power production capability. Counter argument to this proposed simple concept of unity power factor (PF) operation of a generator is the concern over potentially reduced stability margin that the generator faces when exposed to a disturbance. The major contribution of this paper is the introduction of a novel control scheme for the SVC that configures the device to function as an energy source and sink during a transient stability contingency. The control objective is to maintain the generator energy conversion constant so that rotor mechanical oscillation is practically eliminated. Simulation results validate the proposed control method. [Copyright &y& Elsevier]

Describes the MATLA-based graphical technique for amortization study of adjustable speed drives. Understanding the performance nature of the adjustable speed drive; Characterization of the motor friction and windage torque; Information on the segregation of eddy current.

Presents a study which demonstrates a novel direct current-link converter which utilizes resonant commutation. Variable-frequency operation of the converter; How harmonic elimination is received; Discussion of the simulation results and experimental validation of the resonant commutation.