Conveners
Thu-Mo-Po4.06 - Wind, Wave, Tidal Generators II
- Liudmila Potanina (Russian Scientific R&D Cable Institute (JSC VNIIKP))
- Kohei Higashikawa (Kyushu University)
Linear generators are extensively applied to direct-drive wave energy converters (DD-WECs). Low power voltage and power density can be considered the main drawbacks of DD-WECs given their low direct-drive speed. To increase the output voltage and power, and reduce the number of PMs, a double-sides stator PM linear generator is proposed and researched in this paper, based on stator flux...
Superconducting generator (SCG) technology is being proposed for large direct-drive offshore wind turbines due to their compactness and light weight. However, SCGs have intrinsically large magnetic air gaps and therefore produce unacceptably high torque during a short circuit. Among possible solutions, using fractional-slot concentrated windings (FSCWs) can reduce the short circuit torque to...
A 10 MW class HTS wind power generator is under development in Korea using REBCO wires for off-shore installation. NI (No-insulation) winding technique is applied to increase the electrical and mechanical stability of the rotor magnets using REBCO wires. The REBCO magnets, having operating temperature around 35 K, are designed to be cooled using forced circulation of cold helium gas. The cold...
Offshore wind power, as a clean and renewable energy, has become the main growth point of wind power development. It is a trend, for offshore wind power, that large power even above 10 MW wind generators are preferred to reduce the cost per MW. Due to the advantage of much higher magnetic loading in the high temperature superconducting (HTS) machine compared to that of the regular machines,...
High temperature superconductors (HTS) are being applied to electric power systems such as generators, motors and reactors. Researches on HTS wind turbine generators are now focused on increasing efficiency and capacity. In the HTS generators, a large magnetic air gap exists because of needed space for a cryostat wall and thermal insulation. Consequently, the reactance is lower than that in a...
Software-based simulations, such as finite element method (FEM), can identify the electromagnetic forces generated by high-temperature superconducting (HTS) coils in a generator, but structural errors can occur in actual manufacturing processes based on the simulation results. Because large wind turbines have high torque, the structural errors in the manufacturing process can cause fatal...
In order to improve the power density and efficiency of the existing generator for wind power generation, a novel double stator brushless doubly-fed generator with back-to-back cage-barrier rotor has been presented not long ago. However, the accident of toughing between inner stator and rotor inner cage-barrier has been found in the process of experiment for prototype, which results in large...
