Rotor Side Control of Wells Turbine Driven Variable Speed Constant Frequency Induction Generator

Murthy, Bhagwan K.; Rao, S. Srinivasa

doi:10.1080/15325000590885225

Cited by 11 publications

(3 citation statements)

References 2 publications

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“…In [20], a power electronic controller was designed for an OWC system with an induction generator-Wells turbine. In [21], the rotor side controller with constant frequency and variable speed operation of OWC was presented.…”

Section: Introductionmentioning

confidence: 99%

Centralized Airflow Control to Reduce Output Power Variation in a Complex OWC Ocean Energy Network

et al. 2020

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A centralized airflow control scheme for a complex ocean energy network (OEN) is proposed in this paper to reduce the output power variation (OPV). The OEN is an integrated network of multiple oscillating water columns (OWCs) that are located at different geographical sites connected to a common electrical grid. The complexity of the OWC-OEN increases manifolds due to the integration of several OWCs and design of controllers become very challenging task. So, the centralized airflow control scheme is designed in two stages. In control stage-1, a proportional-integral- (PI-) type controller is designed to provide a common reference command to control stage-2. In control stage-2, the antiwindup PID controllers are implemented for the airflow control of all the OWCs simultaneously. In order to tune the large number of control parameters of this complex system, a fitness function based on integral squared error (ISE) is minimized using the widely adopted particle swarm optimization (PSO) technique. Next, the simulation results were obtained with random wave profiles created using the Joint North Sea Wave Project (JONSWAP) irregular wave model. The OPV of the proposed OWC-OEN was reduced significantly as compared to the individual OWC. It was further observed that the OPV of the proposed scheme was lower than that achieved with uncontrolled and MPPT controlled OWC-OEN. The effect of communication delay on the OPV of the proposed OWC-OEN scheme was also investigated with the proposed controller, which was found to be robust for a delay up to 100 ms.

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Section: Introductionmentioning

confidence: 99%

Centralized Airflow Control to Reduce Output Power Variation in a Complex OWC Ocean Energy Network

et al. 2020

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“…Therefore, the economic efficiency of WEC systems (WECS) is far from rivaled, and the use of intelligent control systems to improve capacity term varies widely [5]. A well-designed and properly controlled Wells turbine electromechanical drive can operate at low air velocity to reduce the average generated power, but this performance is not desirable [6]. Recently, the sliding mode control (SMC) theory based on the variable structure system has been a good choice especially for the wave energy conversion systems [7,8].…”

Section: Introductionmentioning

confidence: 99%

New Intelligent Control Strategy Hybrid Grey–RCMAC Algorithm for Ocean Wave Power Generation Systems

Hong

Han

et al. 2020

Energies

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In this article, the characteristics of the wave energy converter are considered and a novel dynamic controller (NDC) for a permanent magnet synchronous generator (PMSG) is proposed for Wells turbine applications. The proposed NDC includes a recursive cerebellum model articulation controller (RCMAC) with a grey predictor and innovative particle swarm optimization (IPSO). IPSO is developed to adjust the learning speed and improve learning capability. Based on the supervised learning method, online adjustment law of RCMAC parameters is derived to ensure the system’s stability. The NDC scheme is designed to maintain a supply–demand balance between intermittent power generation and grid power supply. The proposed NDC exhibits an improved power regulation and dynamic performance of the wave energy system under various operation conditions. Furthermore, better results are obtained when the RCMAC is used with the grey predictive model method.

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“…The control block was based on a look-up-table (LUT) with input as the chamber pressure and output as the external rotor resistance. The advanced versions of [13] could be found in [16][17][18] which were based on different power electronic converter control arrangements. The work carried out in [13] was also applied to solve the control issues of OWC plant of Mutriku harbour, Basque Country, Spain [19].…”

Section: Introductionmentioning

confidence: 99%

Maximizing Output Power in Oscillating Water Column Wave Power Plants: An Optimization Based MPPT Algorithm

2018

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This paper proposes an optimization based maximum power point tracking (MPPT) algorithm for selection of appropriate external rotor resistances of wound rotor induction generator (WRIG). The generator coupled with a Wells turbine is used in oscillating water column (OWC) wave power plants. The Wells turbine suffers with stalling behaviour that reduces the average output power significantly. Hence, the objective is to prevent aerodynamic stalling of the Wells turbine and hence maximizing the output power simultaneously. But inappropriate selection of rotor resistance leads to excessive power loss. Therefore, two approaches have been applied: (i) the rotor resistance values are selected manually by trial and error method or non-optimized approach (ii) a performance index has been derived and minimized using particle swarm optimization technique to obtain the optimized values of rotor resistance. Simulation results have been performed for turbine efficiency, output power and power loss in external rotor resistance. Finally, the proposed control approach is illustrated for two particular cases of regular and irregular waves.

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Rotor Side Control of Wells Turbine Driven Variable Speed Constant Frequency Induction Generator

Cited by 11 publications

References 2 publications

Centralized Airflow Control to Reduce Output Power Variation in a Complex OWC Ocean Energy Network

Centralized Airflow Control to Reduce Output Power Variation in a Complex OWC Ocean Energy Network

New Intelligent Control Strategy Hybrid Grey–RCMAC Algorithm for Ocean Wave Power Generation Systems

Maximizing Output Power in Oscillating Water Column Wave Power Plants: An Optimization Based MPPT Algorithm

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