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Development of a High-Performance Induction Generator for Wind Power and Small-Scale Hydropower Plants

风力发电和小型水力发电厂高性能感应发电机的开发

基本信息

批准号：
14550281
负责人：
FUKAMI Tadashi
金额：
$ 1.79万
依托单位：
Kanazawa Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

项目摘要

Recently, wind power and small-scale hydropower have been extensively introduced as renewable energy sources that contribute to environmental protection. In such power plants, induction generators are widely used because they can be directly connected to a power grid and do not require much additional equipment while being advantageous in terms of cost and maintenance. However, the induction generators require a magnetizing current from the power grid, which essentially causes a decrease in power factor and efficiency. Therefore, the performance of the induction generators needs further improvement.In this research project, a new type of induction generator termed the "Permanent-Magnet Induction Generator (PMIG)" was developed. The PMIG has a permanent magnet rotor (PM rotor) rotating freely that is mounted within a squirrel-cage rotor linked to the shaft. The stator is the same as that of usual induction generators. A 2.2-kW prototype machine was designed and built. To construct a guideline for creating an optimum design of the PMIG, a technique for the steady-state analysis was also developed. The validity of the developed technique and the practical value of the PMIG were confirmed through experiments performed on the prototype machine. As a result, it was found that the internal self-excitation by the PM rotor contributes to a decrease in the magnetizing current and improves the power factor and efficiency.

近年来，风电和小水电作为有助于环境保护的可再生能源被广泛引入。在这样的发电厂中，感应发电机被广泛使用，因为它们可以直接接入电网，不需要太多额外的设备，同时在成本和维护方面具有优势。然而，感应发电机需要来自电网的励磁电流，这本质上会导致功率因数和效率的下降。因此，感应发电机的性能需要进一步提高。在本研究项目中，开发了一种新型的感应发电机--永磁感应发电机(PMIG)。PMIG有一个可自由旋转的永磁体转子(PM转子)，安装在与轴相连的松鼠笼形转子内。定子与通常的感应发电机相同。设计并制造了一台2.2千瓦的样机。为了建立PMIG的优化设计指南，还开发了一种用于稳态分析的技术。通过在样机上进行的实验，验证了所开发技术的有效性和永磁同步电机的实用价值。结果表明，永磁电机转子内部的自励磁有助于减小励磁电流，提高功率因数和效率。