环境模拟风洞高压动力系统设计研究

Design and Research of High Voltage Power System in Environmental Simulation Wind Tunnel

摘要:

为实现环境模拟风洞风速性能指标,对动力系统进行了设计。介绍了环境模拟风洞的气动轮廓构型,阐述了动力系统的工作原理,包括主驱动回路、散热辅助系统和控制系统,给出了10kV 4MW动力电机的计算选型过程并分析了电机特性曲线。采用高压变频器实现了动力系统的调速驱动,通过48脉冲整流完美无谐波矢量变频实现高品质的电能利用。通过基于Modbus TCP现场总线协议,实现了主控计算机、本地控制系统的实时通讯和数据交互,给出了控制系统软件工作流程。通过不同构型风洞喷口试验,分析研究了最大风速和极端温度负荷工况条件下,轴功率随试验温度的变化关系、电机温升特性以及稀油站供油压力与轴升的关系。实验测试结果表明,本系统对于环境模拟风洞有较好的风速、温度匹配性能,对于开展相关实验具有优良环境适应性。

Abstract:

In order to realize the performance index of wind speed in environmental simulation wind tunnel, the dynamic system is designed. This paper introduces the aerodynamic profile configuration of the environmental simulation wind tunnel, expounds the working principle of the power system, including the main drive loop, heat dissipation auxiliary system and control system, gives the calculation and selection process of the 10kV 4MW power motor and analyzes the motor characteristic curve.The high voltage inverter is adopted to realize the speed regulation drive of the power system, and the high quality power utilization is realized through 48 pulse rectifier perfect non-harmonic vector frequency conversion.Through the Modbus TCP fieldbus protocol, the real-time communication and data interaction between the master computer and the local control system are realized, and the software workflow of the control system is presented.Through the wind tunnel nozzle tests with different configurations, the relationship between the axial power and the test temperature, the motor temperature rise characteristics, and the relationship between the oil supply pressure and the shaft rise under the conditions of maximum wind speed and extreme temperature load are analyzed and studied.The experimental results show that the system has good matching performance of wind speed and temperature for environmental simulation wind tunnel, and has excellent environmental adaptability for carrying out relevant experiments.