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A fixed frequency operated bidirectional series-resonant (BSR) converter is proposed for energy storage system in dc microgrid. Simple pulsewidth modulation (PWM) control is applied to the proposed converter to regulate the power flows and achieve the following attractive features: 1) the voltage gain of the converter is only determined by the effective duty cycles of switches and has nothing to do...
A real-time simulation for the Cascaded STATCOM fully implemented on field-programmable-gate-arrays (FPGA) is proposed in this paper. The switching-function model for the STATCOM is employed, where the IGBTs and diodes are taken as ideal switches, to reduce the amount of calculation. With the help of external circuit calculation, the operation in dead-time period is taken into consideration, which...
To study the clustered voltage balancing mechanism for cascaded H-bridge STATCOM, the active power from the grid is decomposed of by using positive and negative sequences in dq frame. Based on the detailed analysis, portion of clustered active power generated by negative-sequence voltages and currents, referred as negative-sequence clustered active power (NCAP), can redistribute the active power among...
Static synchronous compensator(STATCOM) is mainly applied to the reactive power compensation condition. This paper established the model of indirect current control. Indirect current control is a kind control strategy of phase and amplitude. The model characteristic is of nonlinear and strong coupling. The nonlinear decoupling characteristics of inverse system combine with the characteristics of nonlinear...
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