Switch Fault Tolerant Model-Based Predictive Control of a VSC Connected to the Grid

Zarei, Mohammad Ebrahim; Gupta, Malaya; Ramirez, Dionisio; Martinez-Rodrigo, Fernando

doi:10.1109/jestpe.2019.2956042

Cited by 9 publications

(21 citation statements)

References 18 publications

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“…After the open switch fault is detected in one or two IGBTs of the same‐leg in the MSC or the GSC, the corresponding faulty phase is connected to the mid‐point of the DC bus by means of a Triack, Fig. 3 a [10]. Once the post‐fault configuration is adopted, the VSC is capable of generating a limited set of space vectors, Table 3.…”

Section: Post Fault Topologymentioning

confidence: 99%

“…The relationship between the GSC voltage and the grid voltage in the stationary reference frame is (see Table 5 for nomenclature)

v_{GSC} = v_{g} + L_{f} \frac{normald i_{g}}{normald t} + R_{normalf} {bold-italici}_{normalg}

The active and reactive powers exchanged by the GSC and grid can be calculated as

P_{g} = 1.5 \cdot ()(, v_{normalg α} i_{normalg α} + v_{normalg β} i_{normalg β})

Q_{g} = 1.5 \cdot ()(, v_{normalg β} i_{normalg α} - v_{normalg α} i_{normalg β})

As explained in [10, 27], it is possible to obtain the power value at the end of the current switching cycle (instant k + 1) if the effect on the power of all the voltage vectors successively applied by the GSC is added to the power value at the beginning of the cycle (instant k )

P_{g} ()(, k + 1) = P_{g} ()(, k) + S_{P a} t_{a} + S_{P b} t_{b} + S_{P c} t_{c}

Q_{g} ()(, k + 1) = Q_{g} ()(, k) + S_{Q a} t_{a} + S_{Q b} t_{b} + S_{Q c} t_{c}

where the power slopes,

S_{P i}

…”

Section: Control Systemsmentioning

confidence: 99%

“…An approach for electric motors based on a two‐vector modeless predictive controller is presented in [9], where a good tracking of the current reference is achieved but the accuracy of the predictions is a function of the sampling rate and the accuracy of the sensors. In [10], a fast algorithm capable of finding the three vectors that minimise the cost function of the MPC in just one step is presented, avoiding searching the location of the reference vector or assessing all the pairs of adjacent vectors in the cost function, which reduces significantly the computing time.…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, this assumption is not accurate since the AC circulating through the faulty phase generates oscillations in the DC voltage. In [10], the authors proposed a modulation system specifically designed for open switch faults, which rebuilds the hexagon from the four remaining vectors and that features short cycle time, constant switching frequency, and three vectors per pulse‐width modulation period, a low ripple in the currents and fast dynamic response.…”

Section: Introductionmentioning

confidence: 99%

“…The control system used in this paper develops the MPC and modulation presented in [10] and analyses the different challenging situations faced by each VSC after a fault as well as the new limits of power and speed of the Wells turbine and relates them to the oscillating water column (OWC) air chamber control.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Robust control of a floating OWC WEC under open‐switch fault condition in one or in both VSCs

Ramirez

Blanco

Zarei

et al. 2020

IET Renewable Power Generation

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The operation and maintenance activity of offshore wind turbines (WTs) increases the cost of the generated energy. Although significant efforts have been made to improve the reliability of the mechanical subassemblies, electrical and electronic subassemblies fail more frequently, causing undesirable downtimes and loss of revenues. Since offshore WTs and wave energy converters (WECs) share the electrical and electronic subassemblies, the reliability of WECs is expected to be affected by the same causes. This study presents a robust model predictive control for a WEC consisting of an oscillating water column (OWC) installed in a point absorber. The control system is capable of dealing with open switch faults in one or two insulatedgate bipolar transistors of the same arm in any of the voltage source converters (VSCs), or even in both VSCs at the same time. The system allows the OWC WEC to generate energy, although under certain restrictions, thereby reducing the urgency of repair and loss of revenues. The performance of the proposed approach is tested for several cases of open switch faults, experimentally in the laboratory using an OWC WEC emulator.

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Section: Post Fault Topologymentioning

confidence: 99%

“…The relationship between the GSC voltage and the grid voltage in the stationary reference frame is (see Table 5 for nomenclature)

v_{GSC} = v_{g} + L_{f} \frac{normald i_{g}}{normald t} + R_{normalf} {bold-italici}_{normalg}

The active and reactive powers exchanged by the GSC and grid can be calculated as

P_{g} = 1.5 \cdot ()(, v_{normalg α} i_{normalg α} + v_{normalg β} i_{normalg β})

Q_{g} = 1.5 \cdot ()(, v_{normalg β} i_{normalg α} - v_{normalg α} i_{normalg β})

P_{g} ()(, k + 1) = P_{g} ()(, k) + S_{P a} t_{a} + S_{P b} t_{b} + S_{P c} t_{c}

Q_{g} ()(, k + 1) = Q_{g} ()(, k) + S_{Q a} t_{a} + S_{Q b} t_{b} + S_{Q c} t_{c}

where the power slopes,

S_{P i}

…”

Section: Control Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Robust control of a floating OWC WEC under open‐switch fault condition in one or in both VSCs

Ramirez

Blanco

Zarei

et al. 2020

IET Renewable Power Generation

Self Cite

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Fault tolerance for PWM rectifiers based on basic voltage space vector model

Sun

Qiu

2022

J. Power Electron.

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Linear multi‐vector model‐based predictive control for grid side converters of renewable power plants under severe grid disturbances

Ramirez

Castillo

Zarei

et al. 2021

IET Renewable Power Gen

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Grid side converters of renewable power plants have to be capable of dealing with severe grid disturbances, such as, grid faults and voltage sags. Model‐based predictive control provides outstanding performance to grid side converters: fast dynamic response, good tracking error and high‐quality currents. However, choosing the best set of vectors for the modulation requires assessing all the possible combinations of vectors using a cost function, which is very time consuming. Thus, the modulation is normally carried out with only 1 or 2 vectors per PWM period to save computing time, but this turns the modulation non‐linear. This lack of linearity makes it impossible to use symmetrical components in unbalanced grids. A linear multi‐vector model‐based predictive control that controls the power of both sequences using a sole cost function and analyses the effect of the transient response of several sequence decomposition systems on the model‐based predictive control predictions and dynamic response is proposed. Moreover, the proposed multi‐vector provides low THD currents while keeping the computing time low. In addition, the paper addresses the extrapolation of the proposed multi‐vector model‐based predictive control to N‐level converters. The good performance obtained is supported by the results obtained in simulations and the laboratory.

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Switch Fault Tolerant Model-Based Predictive Control of a VSC Connected to the Grid

Cited by 9 publications

References 18 publications

Robust control of a floating OWC WEC under open‐switch fault condition in one or in both VSCs

Robust control of a floating OWC WEC under open‐switch fault condition in one or in both VSCs

Fault tolerance for PWM rectifiers based on basic voltage space vector model

Linear multi‐vector model‐based predictive control for grid side converters of renewable power plants under severe grid disturbances

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