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The hybrid three-phase rectifiers (HTR) consist of parallel associations of two rectifiers (rectifier 1 and rectifier 2), each one of them with a distinct operation, while the sum of their input currents forms a sinusoidal or multilevel waveform. In general, rectifier 1 is a GRAETZ (full bridge) (can be combined with a BOOST converter) and rectifier 2 is combined with a DC-DC converter. In this HTR contest, this paper is intended to answer some important questions about those hybrid rectifiers. To obtain the correct answers, the study is conducted as an analysis of a systematic literature review. Thus, a search was carried out in the databases, mostly IEEE and IET, and 34 papers were selected as the best corresponding to the HTR theme. It is observed that the preferred form of power distribution in unidirectional hybrid three-phase rectifiers (UHTR) is
José Gonçalves; Stanimir Valtchev; Rui Melicio; Alcides Gonçalves; Frede Blaabjerg. Hybrid Three-Phase Rectifiers with Active Power Factor Correction: A Systematic Review. Electronics 2021, 10, 1520 .
AMA StyleJosé Gonçalves, Stanimir Valtchev, Rui Melicio, Alcides Gonçalves, Frede Blaabjerg. Hybrid Three-Phase Rectifiers with Active Power Factor Correction: A Systematic Review. Electronics. 2021; 10 (13):1520.
Chicago/Turabian StyleJosé Gonçalves; Stanimir Valtchev; Rui Melicio; Alcides Gonçalves; Frede Blaabjerg. 2021. "Hybrid Three-Phase Rectifiers with Active Power Factor Correction: A Systematic Review." Electronics 10, no. 13: 1520.
In this paper, a new way to mitigate the current interactions is proposed. The problem of current interactions arises when a modular three-phase (3-phase) rectifier (three single-phase modules) with boost converter for power factor correction (PFC) is used. A new differential-mode choke filter is implemented in the developed boost converter. The choke here is a specially made differential inductor in the input of the boost converter that eliminates the known current interactions. To prove the new concept, a study of the level of mitigation of the current interactions is presented. The control is operated in continuous driving mode (CCM), and the popular UC3854B circuit was used for this. The rectifier proposal is validated through a set of simulations performed on the PSIM 12.0 platform, as well as the construction of a prototype. With the results obtained, it is confirmed that the differential-mode choke filter eliminates the current interactions. It is observed that at the input of the rectifier, a sinusoidal alternating current with a low level of harmonic distortion is consumed from the grid. The sinusoidal shape of the phase current proves that a better power factor capable of meeting the international standards is obtained, and that the circuit in its initial version is operational. This proven result promises a good PFC operation, to guarantee the better quality of the electrical energy, being able to be applied in systems that require a high PFC, e.g., in battery charging, wind systems, or in aeronautics and spacecrafts.
José Teixeira Gonçalves; Stanimir Valtchev; Rui Melicio. Current Interactions Mitigation in 3-Phase PFC Modular Rectifier through Differential-Mode Choke Filter Boost Converter. Applied Sciences 2021, 11, 1684 .
AMA StyleJosé Teixeira Gonçalves, Stanimir Valtchev, Rui Melicio. Current Interactions Mitigation in 3-Phase PFC Modular Rectifier through Differential-Mode Choke Filter Boost Converter. Applied Sciences. 2021; 11 (4):1684.
Chicago/Turabian StyleJosé Teixeira Gonçalves; Stanimir Valtchev; Rui Melicio. 2021. "Current Interactions Mitigation in 3-Phase PFC Modular Rectifier through Differential-Mode Choke Filter Boost Converter." Applied Sciences 11, no. 4: 1684.
With the objective of having a solar thermoelectric system, running for 24 h a day along the different seasons of the year it is necessary to dimension the adequate storage and back-up systems. The choice of the back-up source of energy depends on how sustainable the power plant should be. In this study, the choice was the use of biomass in order to have a 100% renewable power plant. The selected site was the Alentejo region (Portugal). The local Direct Normal Irradiation (DNI) data was used to simulate with the System Advisor Model program (SAM) considering a solar system with north field and molten salt storage. The system needs no back-up during three months in a year. The use of biomass pellets is a viable alternative because it makes the power plant 100% renewable and dispatchable without loss of energy due to over-dimension of the expensive solar field and molten storage system.
José Teixeira Gonçalves; Cristina Inês Camus; Stanimir Stoyanov Valtchev. Solar Thermoelectric System with Biomass Back-up. Lecture Notes in Control and Information Sciences 2017, 499, 358 -369.
AMA StyleJosé Teixeira Gonçalves, Cristina Inês Camus, Stanimir Stoyanov Valtchev. Solar Thermoelectric System with Biomass Back-up. Lecture Notes in Control and Information Sciences. 2017; 499 ():358-369.
Chicago/Turabian StyleJosé Teixeira Gonçalves; Cristina Inês Camus; Stanimir Stoyanov Valtchev. 2017. "Solar Thermoelectric System with Biomass Back-up." Lecture Notes in Control and Information Sciences 499, no. : 358-369.