Construction and Testing of the 3.3 kV, 300 kVA UNIFLEX-PM Prototype

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society

et al. 2013

Multilevel Converters are known to have many advantages for electricity network applications. In particular Cascaded H-Bridge Converters are attractive because of their inherent modularity and scalability. Predictive control for power converters is advantageous as a result of its applicability to discrete system and fast response. In this paper a novel control technique, named Modulated Model Predictive Control, is introduced with the aim to increase the performances of the Predictive control. The proposed controller is described in detail and validated through simulation and experimental testing, in comparison with Dead-Beat and Model Predictive Control. © 2013 IEEE

Section: Resultsmentioning

confidence: 99%

A new predictive control method for cascaded multilevel converters with intrinsic modulation scheme

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society

et al. 2013

“…This converter is able to operate at input AC voltage of 3.3kV controlling an AC current of approximately 65A at full power [28]. However, in order to test the control scheme, only low voltage tests are presented in this work, even if the converter device switching frequency is maintained at the nominal value (800Hz) when a sampling frequency of 5kHz is considered, to emulate high power switching conditions.…”

Section: Resultsmentioning

confidence: 99%

“…Experimental testing has been carried out for the proposed M 2 PC on a 300kVA 3-Phase, 7-Level CHB Back-To-Back converter [28] shown in Figure 5, with the experimental parameters of Table II. This converter is able to operate at input AC voltage of 3.3kV controlling an AC current of approximately 65A at full power [28].…”

Section: Resultsmentioning

confidence: 99%

Multiobjective Modulated Model Predictive Control for a Multilevel Solid-State Transformer

IEEE Trans. on Ind. Applicat.

et al. 2015

Self Cite

“…Further experimental results have been obtained from a second converter with a similar configuration, shown in Fig. 9, denoted as UNIFLEX-PM converter [23], [44], [45]. Each phase of the UNIFLEX-PM converter is composed of three fundamental cells, each one comprising four H-bridges and a medium frequency transformer.…”

Section: Resultsmentioning

confidence: 99%

“…Control of the DC/DC isolation modules, comprising two Hbridges and the MF transformer, is implemented entirely using the FPGA with the aim to equalize the DC-link voltages on the two sides of the converter [46]. The tests have been performed using the parameters shown in Table IV [44], and a supply voltage of 190V rms. In this case the proposed control and modulation are implemented on side 1 while, on side 2, a Dead-Beat control with the DCM is implemented.…”

Section: Resultsmentioning

confidence: 99%

Active DC Voltage Balancing PWM Technique for High-Power Cascaded Multilevel Converters

IEEE Trans. Ind. Electron.

et al. 2014

Self Cite

Abstract-In this paper a dedicated PWM technique specifically designed for single-phase (or four wire three-phase) multilevel Cascaded H-Bridge Converters is presented. The aim of the proposed technique is to minimize the DC-Link voltage unbalance, independently from the amplitude of the DC-Link voltage reference, and compensate the switching device voltage drops and on-state resistances. Such compensation can be used to achieve an increase in the waveform quality of the converter. This is particularly useful in high-power, low supply voltage applications where a low switching frequency is used. The DCLink voltage balancing capability of the method removes the requirement for additional control loops to actively balance the DC-Link voltage on each H-Bridge, simplifying the control structure. The proposed modulation technique has been validated through the use of simulation and extensive experimental testing to confirm its effectiveness.