DSP-based Direct Power Control of a VSC with Voltage Angle Estimation

Eloy-García, Joaquin; Alves, R. T.

doi:10.1109/tdcla.2006.311376

Cited by 20 publications

(12 citation statements)

References 5 publications

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“…In this algorithm, presented in [23], a new table is proposed based on geometrical considerations. This table is simpler than Noguchi's (6 sectors instead of 12) and yields better results.…”

Section: E Results For Eloy-garcía's Tablementioning

confidence: 99%

“…Since the original table was published in [6], several alternative switching tables have been proposed [6], [23] trying to improve the behavior of the system. Yet, they all share some common shortcomings due to some assumptions made in the algorithm.…”

Section: Analysis Of Conventional Dpc-tmentioning

confidence: 99%

“…Experimental results for DPC-T with Eloy-García's table[23] for different power references near power limits. Around t = 0 s, there is a change inP ref , and around t = 0, 05 s, there is a change in Q ref .…”

mentioning

confidence: 99%

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Table-Based Direct Power Control: A Critical Review for Microgrid Applications

Alonso-Martínez

Carrasco

Arnaltes

2010

IEEE Trans. Power Electron.

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Direct power control (DPC) has increasingly gained attention in the last years as a robust and simple control scheme. Yet, the implications of some of the assumptions made by the original table-based DPC are not well explained in the literature. Here, a new formulation of DPC is presented, that allows to analyze the shortcomings of this kind of algorithms, mainly regarding the power limits in which table-based algorithms are valid. This is a key aspect for microgrid applications, as they require a wide range of possible active and reactive power setpoints in order to be able to control the system's voltage and frequency. A new table is then presented that allows to overcome those limitations. The proposed table is valid at any point of the inverter's power limits.Index Terms-Direct power control (DPC), power systems control, switching table, three-phase inverter.

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Section: E Results For Eloy-garcía's Tablementioning

confidence: 99%

Section: Analysis Of Conventional Dpc-tmentioning

confidence: 99%

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Table-Based Direct Power Control: A Critical Review for Microgrid Applications

Alonso-Martínez

Carrasco

Arnaltes

2010

IEEE Trans. Power Electron.

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“…Moreover, the execution Numerous PWM strategies have been proposed to solve the neutral-point voltage unbalance problem. Many of these techniques still use the complicated dwelling time calculation and the switching sequence selection method [12], [14], [16]. The neutral-point voltage control algorithm is easily implemented, and the dwelling time calculation and the switching sequence selection are easily conducted similar to that of a conventional two-level rectifier when the new PWM strategy is used.…”

Section: Neutral-point Voltage Balance Strategy Based On Simplifiementioning

confidence: 99%

“…The PI controllers experience lag in the sinusoid response for certain frequencies [13]. The direct power based on the SVM control has to track the phase angle of the grid voltage and transform to a synchronous rotating coordinate reference frame [14], [15]. The sliding mode control methodology is an effective, high-frequency switching control for non-linear systems with uncertainties.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Direct Power Control Method of Vienna Rectifiers Using the Sliding Mode Control Approach

Ma¹,

Xie²,

Sun³

et al. 2015

Journal of Power Electronics

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This paper uses the switching function approach to present a simple state model of the Vienna-type rectifier. The approach introduces the relationship between the DC-link neutral point voltage and the AC side phase currents. A novel direct power control (DPC) strategy, which is based on the sliding mode control (SMC) for Vienna I rectifiers, is developed using the proposed power model in the stationary a b -reference frames. The SMC-based DPC methodology directly regulates instantaneous active and reactive powers without transforming to a synchronous rotating coordinate reference frame or a tracking phase angle of grid voltage. Moreover, the required rectifier control voltages are directly calculated by utilizing the non-linear SMC scheme. Theoretically, active and reactive power flows are controlled without ripple or cross coupling. Furthermore, the fixed-switching frequency is obtained by employing the simplified space vector modulation (SVM). SVM solves the complicated designing problem of the AC harmonic filter. The simplified SVM is based on the simplification of the space vector diagram of a three-level converter into that of a two-level converter. The dwelling time calculation and switching sequence selection are easily implemented like those in the conventional two-level rectifier. Replacing the current control loops with power control loops simplifies the system design and enhances the transient performance. The simulation models in MATLAB/Simulink and the digital signal processor-controlled 1.5 kW Vienna-type rectifier are used to verify the fast responses and robustness of the proposed control scheme.

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