Sensor-less MPPT Control of Small Sized Wind Turbine Generation System and Power Leveling Using Flywheel

2003年是本项目的最后一年，为加快风力发电系统的推广，从以下几点进行了研究，并取得了一些优秀的成果；小型风力发电机组MPPT运行(1)2002年又对一台50W输出的风力发电机组进行了性能评估。今年，东京理工大学风工程中心的大型风洞已被用于测试。对理想均匀风速条件下和使用鼓风机条件下的性能进行了比较研究。结果表明，通过使用小型鼓风机进行测试，可以充分再现性能特征，从而可以轻松地在室内条件下进行测试。ii)研究表明，针对光伏系统开发的“极限环MPPT控制方案”同样适用于风力发电系统。这使得风力发电系统的功率…更无传感器和转速无传感器的MPPT控制系统。iii)采用基于d-q帧的控制器代替滞回比较器，改进了采用2.2kW感应电机和2kW永磁同步发电机的实时仿真系统的电流控制回路。研究了飞轮储能系统的调速和恒功率加速控制方案，这是飞轮储能系统利用飞轮的重要技术之一。通过计算系统特征值，研究了小型自主分布式供电系统等效电阻控制的稳定性问题。结果表明，采用等效电阻控制在稳态状态下稳定直流链路电压，对于倾销系统的暂态响应是无效的。这一事实为今后研究控制策略提供了信息。少

In 2003,the last year for this project, the following points have been investigated in order to accelerate the diffusion of wind turbine generation systems, and some excellent results have been obtained ;A. MPPT operation of small sized wind turbine generatorsi) Performance evaluation of a 50W output wind turbine generator has been carried out following that in 2002. This year, the large scale wind tunnel in Tokyo Plytechnic University Wind Engineering Center has been utilized for the testing. The comparative study of performance under idealized uniform wind speed and that under using a blower has been investigated in detail. It turned out that the performance characteristics can be sufficiently reproduced by the testing using a small blower, which enables easy testing with in -door conditions.ii) It has been shown that the "Limit cycle MPPT control scheme" which has been developed for a photovoltaic system is also applicable to the wind turbine generation system. Which enables a power … More sensor-less and rotating speed sensor-less MPPT control system for a wind turbine generation system.iii) The current control loop of the real-simulator system using a 2.2kW induction motor and a 2kW PM synchronous generator has been improved by replacing hysterisis comparator with d-q frame based controller.B. Power leveling of fluctuated power using flywheelA control scheme for rotating speed picking-up and constant power acceleration of a flywheel energy storage system, which is one of the important techniques in utilizing flywheels, has been investigated.C. Extraction of the problems in small sized autonomous distributed power supply systemsStability study of equivalent resistance control for an autonomously controlled distributed power supply system has been investigated by calculating the system eigen values. It turned out that the equivalent resistance control which is adopted to stabilize the dc link voltage in steady state condition is not effective for dumping the transient response of the system. This fact is informative for the future investigation on the control strategies. Less