PERFORMANCE COMPARISON OF TRADITIONAL AND EMERGING DOUBLY-FED GENERATOR TOPOLOGIES FOR GRID-CONNECTED WIND POWER APPLICATIONS

目前公认的大型风力发电机技术是双馈感应发电机（DFIG）。该技术的流行主要是由于部分额定电力电子转换器的成本降低。消极的一面是发电机需要电刷和滑环，这需要定期维护。另一种方案是基于无刷双馈磁阻电机（BDFRM），它也具有部分额定功率转换器的成本效益，但顾名思义，它不需要电刷和滑环。BDFRM尚未用于风力发电应用。该项目将通过实验检验其在风力发电应用中的性能。有许多不同的方法来控制BDFRM。该项目将检查直接功率控制（DPC）的使用。这种控制方法将包括无传感器操作和机器参数独立。随着风力发电的普及，电力系统的稳定性问题备受关注。检查任何发电系统的故障穿越（FRT）能力是很重要的。该项目将检查BDFRM的FRT能力，并将其与DFIG的FRT能力进行比较。这就需要在实验室测试台中安装特殊的电网故障模拟设备。

Currently the accepted technology for large wind turbines is the doubly-fed induction generator (DFIG). This technology is popular primarily due to the reduced cost of the partially rated power electronic converter. On the negative side is the fact that the generator requires brushes and slip rings which require regular maintainance.An alternative scheme is based on the brushless doubly-fed reluctance machine (BDFRM) which also has the cost benefit of a partially rated power converter but as its name implies does not require brushes and slip rings.The BDFRM has not been used for a wind power application. This project will experimentally examine its performance for a wind power application. There are a number of different approaches to the control of a BDFRM. The project will examine the use of Direct Power Control (DPC). This control approach will include sensorless operation and machine parameter independence. With the proliferation of wind power generation the issue of power system stabilty is of great concern. It is important to examine the fault-ride-through (FRT) capabilty of any generation system. This project will examine the FRT capability of the BDFRM and compare this to that of the DFIG. This will require that special grid fault emulation equipment is included in the laboratory test rig.