Development of low-cost adjustable -speed generator systems suitable for renewable energy sources

开发适用于可再生能源的低成本调速发电机系统

基本信息

批准号：
14350140
负责人：
OGUCHI Kuniomi
金额：
$ 4.54万
依托单位：
Ibaraki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

Adjustable-speed wound-rotor induction generators are widely used for wind power generation, in which the secondary power is extracted through brushes and slip-rings and is controlled by an inverter. This secondary excitation system requires smaller ratings of the inverter than those of stator power control systems and it is economical. The brushes and slip-rings need periodical maintenance. Therefore, a big maintenance problem may be occur in near future because a large number of generatoras.In our project, we have mainly studied brushless secondary excitation systems to solve the maintenance problem mentioned above. The major results of our research are as follows :1.Brushless cascaded induction generator systemsA newly developed cascaded induction generator has been proposed in which the second induction generator has a six-phase winding and a 12-pulse diode rectifier. This system can give very economical solution of the maintenance problem and harmonic current pollution. However, a … More power factor correction may be needed to compensate the poor power factor characteristics. The proposed system is well suited for large power applications.2.Brushless reluctance-type induction generatorsA proto type of the doubly-fed reluctance-type induction generators was built and tested. This generator has a simple structure ; its rotor has no windings and only an iron core with flux barriers, and the stator has double three-phase windings with different pole-numbers. The experimental generator has good control characteristics except for the poor power factor.3.A novel system of a wound-rotor induction generatorA slip power recover inverter in a conventional wound rotor induction generator system is connected in-parallel with the stator windings through three-phase transformers. We have developed a novel system in which the recovery inverter is connected directly in-series with the stator windings without using the transformers. The system steady-characteristics was examined with computer simulation and the good results were obtained. Transient characteristics will be studied in future for practical applications. Less

可调节的速度风转电感应发生器被广泛用于风力发电，其中通过刷子和滑动环提取二次电源，并由逆变器控制。与定子电源控制系统相比，这种次要兴奋系统需要逆变器的评级较小，并且是经济的。刷子和滑环需要定期维护。因此，由于大量发电机。在我们的项目中，我们主要研究了无刷的次要兴奋系统，以解决上述维护问题。我们的研究的主要结果如下：1。已提出了新开发的级联感应发生器的无灌木级联感应发生器Systemsa，其中第二种诱导发电机具有六阶段的绕组和12脉冲二极管的整流器。该系统可以为维护问题和谐波电流污染提供非常经济的解决方案。但是，可能需要进行更多的功率因数校正来补偿功率因数差的特征。所提出的系统非常适合大型功率应用。2。构建和测试了双喂养的不情愿不情愿的感应型发电机的无尿不情愿型感应发电机。该发电机具有简单的结构。它的转子没有绕组，只有一个带有通量屏障的铁芯，并且定子具有带有不同杆数的双相绕组。实验发电机具有良好的控制特性，除了较差的功率因数。3。在传统的伤口转子感应发电机系统中，伤口旋转诱导发电机滑动功率恢复逆变器的新型系统与定子绕组通过三相变压器并行连接。我们已经开发了一个新型系统，其中恢复逆变器与定子绕组直接连接而不使用变压器。使用计算机模拟检查了系统稳态特征，并获得了良好的结果。将来，瞬态特征将在实际应用中研究。较少的