Experimental Study And Numerical Simulation Research Of Wind Turbine Cooling System

Cooling System is an important component part of wind power system, its performance is asignificant measuring standard of generator that whether it can operate safely and reliably. Taking3MW wind turbine as the research object, designed the cooling system and finished theoreticalcalculation based on physical structure and thermal characteristic of the generator. Established theexperiment table and studied loss situation and cooling performance of the cooling system under30%、50%、80%、100%load condition. Comparative experiment under100%load was taken to verifythe consistency of generator craft. Proposed four optimization solutions based on the experimentresult and studied on them with the numerical simulation method, obtained the optimal solutionthough simulation result.The result of experimental study of cooling system conclude that the rise of temperature canmeet the design requirement under30%,50%,80%load, while the temperature of100%loadexperiment exceeded the range of work requirement, system optimization is needed. Each parameterof two generators has same trend in the100%load comparative experiment, with small differencewhen the experiment was stabilized, which verified the consistency of generator craft.The result of numerical simulation study of cooling system conclude that the method offinite-element numerical simulation can reflect the temperature distribution of generator, simulationand experimental results has good consistency. Among the four optimization solutions, hollow wirecooling method was the optimal solution and it has good performance in the high-temperature region,which can meet the design requirement of generator.Research methods and conclusions of this paper can provide a reference for experimental andtheoretical studies of wind turbine cooling system.