Integrated design and implementation of 120-kW horizontal-axis tidal current energy conversion system

Gu, YuanTong; Liu, Hongwei; Li, Wei; Lin, Yaolin; Li, Yang-jian

doi:10.1016/j.oceaneng.2018.04.017

Cited by 34 publications

(10 citation statements)

References 12 publications

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“…where β is the blade pitch angle. The C p − λ curve for the pitch-controlled turbine and the pitch controller used here is similar to that of the 120 kW turbine studied in [35]. The maximum rate for the pitch controller is limited to ±5 • per second.…”

Section: Turbine and Generator Specificationsmentioning

confidence: 89%

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Thermal Cycling in Converter IGBT Modules with Different Cooling Systems in Pitch- and Active Stall-Controlled Tidal Turbines

et al. 2021

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This paper compares active and passive cooling systems in tidal turbine power electronic converters. The comparison is based on the lifetime of the IGBT (insulated gate bipolar transistor) power modules, calculated from the accumulated fatigue due to thermal cycling. The lifetime analysis accounts for the influence of site conditions, namely turbulence and surface waves. Results indicate that active cooling results in a significant improvement in IGBT lifetime over passive cooling. However, since passive cooling systems are inherently more reliable than active systems, passive systems can present a better solution overall, provided adequate lifetime values are achieved. On another note, the influence of pitch control and active speed stall control on the IGBT lifetime was also investigated. It is shown that the IGBT modules in pitch-controlled turbines are likely to have longer lifetimes than their counterparts in active stall-controlled turbines for the same power rating. Overall, it is demonstrated that passive cooling systems can provide adequate cooling in tidal turbine converters to last longer than the typical lifetime of tidal turbines (>25 years), both for pitch-controlled and active speed stall-controlled turbines.

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Section: Turbine and Generator Specificationsmentioning

confidence: 89%

“…Beyond rated speed, the pitch-controlled turbine keeps operating at the rated rpm, using the blade pitch angle to maintain the rated power [35]. On the other hand, in the stall-controlled turbine, the speed of the turbine is reduced to lower C p and regulate the output power [2].…”

Section: Turbine and Generator Specificationsmentioning

confidence: 99%

Thermal Cycling in Converter IGBT Modules with Different Cooling Systems in Pitch- and Active Stall-Controlled Tidal Turbines

et al. 2021

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“…In 2015, a hydraulic pitchable 120 kW grid connected horizontal axis marine current turbine was deployed, as shown in Fig. 5, representing the first grid-connected marine current energy conversion turbine in China [35]. The hydraulic pitch system made it possible for the turbine to control output power and operate in bidirectional flow.…”

Section: ) Research and Developmentmentioning

confidence: 99%

Status of Marine Current Energy Conversion in China

Liu

Bahaj

2021

Int. J. Mar. Ene.

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Marine current energy conversion (MCEC) technologies are promising renewable energy systems with some full scale and semi-commercial turbines constructed and deployed in several countries around the world. In this work, we present the status of marine current energy and systems in China and policies geared to support these. Over the past ten years the Chinese government has provided a policy framework and financial supports for the development of MCEC technologies of various design philosophies which has resulted in significant technology deployment at sea. A review of these technologies – which have turbine capacities in the range 20 kW to 650 kW, mostly tested at sea – is presented in the paper. In addition, the paper also discusses Chinese plans for marine energy test sites at sea to support prototype development and testing and concludes with a view of future prospects for the marine energy technology deployment in China.

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“…There are also other papers committed to marine current power generation systems, such as [24]. In [25], the integrating design and implementation of a 120 kW horizontal axis tidal energy conversion system is proposed and verified on the entire system to determine the effectiveness and feasibility. An improved control strategy for system main frequency control is proposed to improve system performance [26] , however, only the frequency variation caused by the change of the pitch angle is considered.…”

Section: Introductionmentioning

confidence: 99%

Optimal Control Design of Generator Systems for Marine Current Turbine Applications Using Economic Model Predictive Control

Teng

2020

IEEE Access

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Integrated design and implementation of 120-kW horizontal-axis tidal current energy conversion system

Cited by 34 publications

References 12 publications

Thermal Cycling in Converter IGBT Modules with Different Cooling Systems in Pitch- and Active Stall-Controlled Tidal Turbines

Thermal Cycling in Converter IGBT Modules with Different Cooling Systems in Pitch- and Active Stall-Controlled Tidal Turbines

Status of Marine Current Energy Conversion in China

Optimal Control Design of Generator Systems for Marine Current Turbine Applications Using Economic Model Predictive Control

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