Development of PTO-Sim: A Power Performance Module for the Open-Source Wave Energy Converter Code WEC-Sim

So, Ratanak; Simmons, Asher; Brekken, Ted K. A.; Ruehl, Kelley; Michelen, Carlos

doi:10.1115/omae2015-42074

Cited by 18 publications

(22 citation statements)

References 8 publications

(8 reference statements)

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“…Wave-to-wire models incorporating diverse degrees of detail have been proposed for different absorbers and PTO types, including overtopping converters [3], oscillating water columns (OWCs) [4,5], and wave-activated converters with different PTO systems, such as hydraulic [6e11], mechanical [12,13], magnetic [14], or linear generators [15,16]. The open-source code WEC-Sim implemented in Matlab/Simulink also provides W2W models for different wave energy devices and PTO systems [17,18].…”

Section: Existing Wave-to-wire Modelsmentioning

confidence: 99%

A high-fidelity wave-to-wire model for wave energy converters

Peñalba

Ringwood

2019

Renewable Energy

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Mathematical models incorporating all the necessary components of wave energy converters (WECs) from ocean waves to the electricity grid, known as wave-to-wire (W2W) models, are vital in the development of wave energy technologies. Ideally, precise W2W models should include all the relevant nonlinear dynamics, constraints and energy losses. This paper presents a balanced W2W model that incorporates high-fidelity models for each conversion system, and can accommodate different types of WECs, hydraulic power take-off (PTO) topologies, electric generators and grid connections. The models of the different conversion stages presented herein are efficiently implemented in the W2W model using a multi-rate integration scheme that reduces the computational requirements by a factor of 10. Two W2W models, i.e. one with the constant-pressure hydraulic PTO configuration and one with the variablepressure configuration, are compared in this paper. Results show that a higher PTO efficiency (30% higher for the constant-pressure configuration) does not necessarily imply a higher electricity generation (2% higher for the variable-pressure configuration), which reinforces the need for high-fidelity W2W models for the design of successful WECs.

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Section: Existing Wave-to-wire Modelsmentioning

confidence: 99%

A high-fidelity wave-to-wire model for wave energy converters

Peñalba

Ringwood

2019

Renewable Energy

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“…Additionally, experimental data or Computational Fluid Dynamics (CFD) software can be used to estimate viscous drag forces to be included in the model as a quadratic damping term. PTO forces in WEC-Sim are modelled as linear or rotational spring damper systems, or can be coupled with PTO-Sim for more sophisticated PTO models [6]. Additionally, mass and inertia properties of each body in the model need to be specified.…”

Section: Wave Energy Converter Simulator (Wec-sim)mentioning

confidence: 99%

WEC-Sim Phase 1 Validation Testing: Experimental Setup and Initial Results

Bosma

Simmons

Lomónaco

et al. 2016

Volume 6: Ocean Space Utilization; Ocean Renewable Energy

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In the wave energy industry, there is a need for open source numerical codes and publicly available experimental data, both of which are being addressed through the development of WEC-Sim by Sandia National Laboratories and the National Renewable Energy Laboratory (NREL). WEC-Sim is an open source code used to model wave energy converters (WECs) when subject to incident waves. In order for the WEC-Sim code to be useful, code verification and physical model validation is necessary. This paper describes the wave tank testing for the 1:33 scale experiments of a Floating Oscillating Surge Wave Energy Converter (FOSWEC). The WEC-Sim experimental data set will help to advance the wave energy converter industry by providing a free, high-quality data set for researchers and developers. This paper describes the WEC-Sim open source wave energy converter simulation tool, experimental validation plan, and presents preliminary experimental results from the FOSWEC Phase 1 testing.

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“…Linear generators only absorb mechanical energy from unidirectional wave motion. However, it is still technically challenging to capture the ocean wave energy [10][11][12]. Synchronous generators can absorb and generate reactive power by adjusting the phase angle between the voltage and current, which will contribute to the power balance of the entire power grid [13].…”

Section: Introductionmentioning

confidence: 99%

Design and Implement of Three-Phase Permanent-Magnet Synchronous Wave Generator using Taguchi Approach

et al. 2021

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In this paper, the design and performance analysis of a high-efficiency permanent-magnet synchronous wave generator (PSWG) are presented. A systematic approach for the design of the outer rotor was proposed as a prototype model. The magnetic field, magnetic circuit characteristics, electrical characteristics of the generator, and optimal design parameters such as the pole–arc ratio and shoe outer length were determined using the Taguchi method, finite-element analysis (FEA) software, and rotor skewing techniques. The proposed six series and six parallel-connection winding configurations can provide an evenly distributed current for practical applications. A PSWG was designed and fabricated according to the proposed methodology. According to the experimental results by implementing the optimized design, the efficiencies of the proposed PSWG which used 3.6 Ω load at 300 rpm is 86.32% and the efficiency error between simulation and experiment is less than 1.8%. It verifies the feasibility of the proposed method to PSWG and the structural reliability optimization design.

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Development of PTO-Sim: A Power Performance Module for the Open-Source Wave Energy Converter Code WEC-Sim

Cited by 18 publications

References 8 publications

A high-fidelity wave-to-wire model for wave energy converters

A high-fidelity wave-to-wire model for wave energy converters

WEC-Sim Phase 1 Validation Testing: Experimental Setup and Initial Results

Design and Implement of Three-Phase Permanent-Magnet Synchronous Wave Generator using Taguchi Approach

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