Measuring MNm torques as part of a prototype testing campaign of a high-temperature superconducting generator for wind turbine application in the scope of the Ecoswing project

Kyling, Hans; Eich, Norbert; Feja, Paul

doi:10.1088/1742-6596/1222/1/012018

Cited by 3 publications

(3 citation statements)

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“…Before being installed on the wind turbine, the HTS generator had been tested on the ground to minimize potential risks and improve the plannability of the commissioning on the turbine. The ground testing used a test bench available at DyNaLab, which offers an almost realistic environment in the multi-MW range to carry out various tests under reproducible conditions [24].…”

Section: B Ground Testingmentioning

confidence: 99%

Commissioning of the World's First Full-Scale MW-Class Superconducting Generator on a Direct Drive Wind Turbine

Song¹,

Bührer²,

Molgaard³

et al. 2020

IEEE Trans. Energy Convers.

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High temperature superconducting (HTS) generators could enable a lightweight and cost-effective direct drive (DD) wind turbines with large power ratings. The EU-funded EcoSwing project successfully demonstrated the world's first full-scale MWclass HTS generator on a commercial DD wind turbine. This paper focuses on the commissioning of the EcoSwing HTS generator on the wind turbine. The commissioning campaigns, including the rotor cool-down, excitation of the HTS field winding, and the power production of the generator, are presented in the paper. In the testing period, the generator was grid-connected for more than 650 hours and accumulatively produced more than 600 MWh to the grid. The target output power of the 3 MW class was reached. Throughout the real-life testing on the wind turbine, the generator performed well from the electromagnetic, thermal, and mechanical perspectives. Moreover, the generator even sustained three sudden short circuits in the converter system. The work reported has shown that HTS generators are technologically feasible for wind turbine applications, and the technology readiness level of HTS Manuscript

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Section: B Ground Testingmentioning

confidence: 99%

Commissioning of the World's First Full-Scale MW-Class Superconducting Generator on a Direct Drive Wind Turbine

Song¹,

Bührer²,

Molgaard³

et al. 2020

IEEE Trans. Energy Convers.

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“…The torque measurement system is based on a force-lever system in a symmetrical arrangement, so that driving torques coming from outer flanges can be directly measured. A detailed description of the propsoed torque measurement system can be found in [20]. Overall, apart from some adaption integration and engineering efforts, no radical changes were needed to test the HTS generator on this test bench.…”

Section: Brief Introduction Of the Test Benchmentioning

confidence: 99%

Ground Testing of the World's First MW-Class Direct-Drive Superconducting Wind Turbine Generator

Song¹,

Bührer²,

Brutsaert³

et al. 2020

IEEE Trans. Energy Convers.

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The EU-funded EcoSwing project addresses the world's first full-scale direct-drive (DD) high temperature superconducting (HTS) wind turbine generator. Before the generator was installed on a commercial wind turbine, the generator had been tested on the ground at the Dynamic Nacelle Testing Laboratory (DyNaLab) in Fraunhofer Institute for Wind Energy Systems (IWES), serving as an experimental validation of the generator design. This article is centered on the ground testing of the EcoSwing HTS generator, which includes corresponding tests for validating the generator's cryogenic design and electromagnetic performance. Despite one HTS coil with a defect limiting the operating current significantly, partial power production up to 1 MW at 14.5 rpm was reached. The critical auxiliary systems, i.e., vacuum system and rotary helium coupling, behaved as expected or even better than anticipated. The work reported in the article successfully validates the generator design, and also provides firsthand information prior to installing and testing the HTS generator on the wind turbine.

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“…Before positioning the rotor into the chamber, the cold yoke with the coils and the current bus were wrapped in three MLI blankets (Coolcat 2NW). The required adjustments are summarized in [225].…”

Section: Vacuum Chambermentioning

confidence: 99%

Conduction-cooled ReBCO coils for the wind converter: from laboratory to field test

Bergen

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Practical high-current applications of low-temperature superconductors (LTS) include magnetic resonance imaging, nuclear magnetic resonance and large magnet systems for high-energy physics and nuclear fusion. Higher magnetic fields and higher operating temperatures require a changeover to high-temperature superconductors (HTS) such as ReBCO. These ceramic materials have a critical temperature T c above the normal boiling point of nitrogen, which in principle allows them to be cooled by liquid nitrogen instead of liquid helium. Using liquid nitrogen instead of liquid helium can simplify the design of the cooling system for the superconducting application. A disadvantage of such a 'wet' magnet is the limited operating temperature range and the requirement of periodic refills which is problematic in the case of non-continuous supply of the cryogenic liquid. Use of cryocoolers, on the other hand, allows the superconducting magnet to be conduction-cooled also to intermediate temperatures. Gifford-McMahon type crycoolers are most commonly used today due to their relatively low cost and high reliability. The

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Measuring MNm torques as part of a prototype testing campaign of a high-temperature superconducting generator for wind turbine application in the scope of the Ecoswing project

Cited by 3 publications

References 1 publication

Commissioning of the World's First Full-Scale MW-Class Superconducting Generator on a Direct Drive Wind Turbine

Commissioning of the World's First Full-Scale MW-Class Superconducting Generator on a Direct Drive Wind Turbine

Ground Testing of the World's First MW-Class Direct-Drive Superconducting Wind Turbine Generator

Conduction-cooled ReBCO coils for the wind converter: from laboratory to field test

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