Journal of Power Electronics and Power Systems
Volume 2, Issue 1 (2012)
Published
Table of contents
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A Simplified Indirect Control Scheme for Shunt-active Power Filters
Abstract: This paper presents a simplified indirect control scheme for shunt-active power filters for compensating harmonic currents and improving power factor. The control is based on the simple method for generation of the reference compensating current. The reference compensating current is obtained by subtracting load current from reference source current. PI controller is used to adjust the amplitude of the reference source current that regulates the DC capacitor voltage. Hysteresis band …
Published in Journal of Power Electronics and Power Systems · Vol. 2, Issue 1, 2012 · pp. 1–7 Read article
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Simulation of Sub-synchronous Resonance (SSR), and Mitigation of SSR by Static Synchronous Series Compensator with Lead Lag Compensator
Abstract: This research work presents a narrative method of alleviating the SSR problem using a static synchronous series compensator (SSSC). This method is based on using the SSSC to inject unbalanced series quadrature voltages and unbalanced shunt reactive currents in transmission line just after clearing faults. When the sub-synchronous oscillations drive unsymmetrical phase currents, the developed electromagnetic torque will be lower than the condition when three-phase currents are symmetrical. The unsymmetrical …
Published in Journal of Power Electronics and Power Systems · Vol. 2, Issue 1, 2012 · pp. 18–23 Read article
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Comparison of Symmetrical and Asymmetrical Cascaded H-Bridge Inverter with Single DC Source
Abstract: This paper presents the comparison of traditional cascaded H-bridge inverter with isolated DC sources (symmetrical arrangement) and the proposed cascaded H-bridge inverter with single DC source (asymmetrical arrangement). Also, fundamental switching strategy is used to generate the control pulses. A conventional cascaded H-bridge (CHB) inverter requires ‘n’ numbers of DC sources for 2n + 1 levels. Without requiring transformers, the scheme proposed here allows the use of a single DC …
Published in Journal of Power Electronics and Power Systems · Vol. 2, Issue 1, 2012 · pp. 8–17 Read article