Predictive Direct Control of SPMS Generators Applied to the Machine Side Converter of an OWC Power Plant

Zarei, Mohammad Ebrahim; Ramirez, Dionisio; Veganzones, C.; Rodriguez, J. J.

doi:10.1109/tpel.2019.2956738

Cited by 10 publications

(13 citation statements)

References 35 publications

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“…MPC of a PMSG is based on its electric model (see Table 4 for nomenclature). The electric equations of a PMSG expressed in the rotor rotating reference frame, d–q frame, are

v_{normals d} = R_{s} i_{normals d} + \frac{d}{normald t} λ_{s d} - ω_{normalm} λ_{s q}

v_{normals q} = R_{s} i_{normals q} + \frac{d}{normald t} λ_{s q} + ω_{normalr} λ_{s d}

As is described in [26], by calculating the slopes of

i_{normals d}

and

i_{normals q}

S_{i_{normals d}}

and

S_{i_{normals d}}

caused in the current by space vectors,

v_{a}, v_{b}, v_{c}

that the electronic converter applies in a fixed sequence. Denoting

i_{normals d} ()(, k)

to the value of the current at the end of the previous cycle, after the application of the three space vectors in the current switching period, the stator current is

i_{normals d} ()(, k + 1) = i_{normals d} ()(, k) + S_{normald a} t_{a} + S_{normald b} t_{b} + S_{normald c} t_{c}

…”

Section: Control Systemsmentioning

confidence: 99%

“…Denoting

i_{normals d} ()(, k)

to the value of the current at the end of the previous cycle, after the application of the three space vectors in the current switching period, the stator current is

i_{normals d} ()(, k + 1) = i_{normals d} ()(, k) + S_{normald a} t_{a} + S_{normald b} t_{b} + S_{normald c} t_{c}

i_{normals q} ()(, k + 1) = i_{normals q} ()(, k) + S_{q a} t_{a} + S_{q b} t_{b} + S_{q c} t_{c}

The objective is to obtain a good

i_{normals d}

and

i_{normals d}

reference tracking, hence the cost function to minimise can be represented as

F ()(, k + 1) = {(i_{s d} (k + 1) - i_{s d}^{*} (k))}^{2} + {(i_{s q} (k + 1) - i_{s q}^{*} (k))}^{2}

where the superscript * denotes the reference values. After minimising (17), the duration times for each voltage vector within a switching interval result in [26]…”

Section: Control Systemsmentioning

confidence: 99%

“…As is described in [26], by calculating the slopes of i sd and i sq , S i sd and S i sd caused in the current by space vectors, v a , v b , v c that the electronic converter applies in a fixed sequence. Denoting i sd k to the value of the current at the end of the previous cycle, after the application of the three space vectors in the current switching period, the stator current is…”

Section: Msc Predictive Controlmentioning

confidence: 99%

“…where the superscript * denotes the reference values. After minimising (17), the duration times for each voltage vector within a switching interval result in [26] (see (18)) (see (19))…”

Section: Msc Predictive Controlmentioning

confidence: 99%

“…Q g k + 1 = Q g k + S Qa t a + S Qb t b + S Qc t c (26) where the power slopes, S Pi , S Qi , for each voltage vector must be calculated as explained in [27]. The cost function used to obtain a good tracking of the power references is…”

Section: Gsc Predictive Controlmentioning

confidence: 99%

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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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“…MPC of a PMSG is based on its electric model (see Table 4 for nomenclature). The electric equations of a PMSG expressed in the rotor rotating reference frame, d–q frame, are

v_{normals d} = R_{s} i_{normals d} + \frac{d}{normald t} λ_{s d} - ω_{normalm} λ_{s q}

v_{normals q} = R_{s} i_{normals q} + \frac{d}{normald t} λ_{s q} + ω_{normalr} λ_{s d}

As is described in [26], by calculating the slopes of

i_{normals d}

and

i_{normals q}

S_{i_{normals d}}

and

S_{i_{normals d}}

caused in the current by space vectors,

v_{a}, v_{b}, v_{c}

that the electronic converter applies in a fixed sequence. Denoting

i_{normals d} ()(, k)

to the value of the current at the end of the previous cycle, after the application of the three space vectors in the current switching period, the stator current is

i_{normals d} ()(, k + 1) = i_{normals d} ()(, k) + S_{normald a} t_{a} + S_{normald b} t_{b} + S_{normald c} t_{c}

…”

Section: Control Systemsmentioning

confidence: 99%

“…Denoting

i_{normals d} ()(, k)

to the value of the current at the end of the previous cycle, after the application of the three space vectors in the current switching period, the stator current is

i_{normals d} ()(, k + 1) = i_{normals d} ()(, k) + S_{normald a} t_{a} + S_{normald b} t_{b} + S_{normald c} t_{c}

i_{normals q} ()(, k + 1) = i_{normals q} ()(, k) + S_{q a} t_{a} + S_{q b} t_{b} + S_{q c} t_{c}

The objective is to obtain a good

i_{normals d}

and

i_{normals d}

reference tracking, hence the cost function to minimise can be represented as

F ()(, k + 1) = {(i_{s d} (k + 1) - i_{s d}^{*} (k))}^{2} + {(i_{s q} (k + 1) - i_{s q}^{*} (k))}^{2}

where the superscript * denotes the reference values. After minimising (17), the duration times for each voltage vector within a switching interval result in [26]…”

Section: Control Systemsmentioning

confidence: 99%

Section: Msc Predictive Controlmentioning

confidence: 99%

“…where the superscript * denotes the reference values. After minimising (17), the duration times for each voltage vector within a switching interval result in [26] (see (18)) (see (19))…”

Section: Msc Predictive Controlmentioning

confidence: 99%

Section: Gsc Predictive Controlmentioning

confidence: 99%

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