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New generator structure with the doubly fed induction machine for better fault ride through properties

采用双馈感应电机的新型发电机结构，具有更好的故障穿越性能

基本信息

批准号：
279959628
负责人：
Professor Dr.-Ing. Wilfried Hofmann
金额：
--
依托单位：
Professur für Elektrische Maschinen und Antriebe
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2015
资助国家：
德国
起止时间：
2014-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/279959628?language=en
关键词：
New generator structure doubly fed

项目摘要

Due to the expansion of alternative energy the interactions with the grid especially during faults become an important topic. Caused by the growing installed power of wind plants, it is necessary to keep them connected with the grid during faults and support the grid. Attributable to the configuration and the function principle of the known generator structure with the doubly fed induction generator voltage dips cause excessive voltage and current increase at the generator clamps which may destroy the converter and stress the grid. In this project a new generator structure have to be analysed which reduces the impact of grid fault on the doubly fed induction machine. This is achieved by introducing an ac-chopper between grid and generator. With the direct matrix converter connected with the rotor windings the ac-chopper effects minimal hardware effort. The control of this new generator structure is the major part of the applied proposal. With an appropriate control of ac-chopper and matrix converter the stator voltage have to be controlled to the reference value during grid faults and should not be influenced by the grid voltage. Commutation strategies for the ac-chopper are also an outstanding subject which has to be treated in this project. The theoretical work is accompanied by simulative analyses and the construction of a converter prototype. Finally, the theoretical results haveto be approved by measurements at a machine test bench with the new generator structure and the converter prototype.

由于替代能源的扩张，与电网的相互作用，特别是在故障期间，成为一个重要的话题。由于风电场装机容量的不断增长，有必要在故障期间保持它们与电网的连接并支持电网。由于已知发电机结构的配置和功能原理，双馈感应发电机电压骤降导致发电机箝位处的过度电压和电流增加，这可能破坏转换器并对电网施加压力。在本项目中，必须分析一种新的发电机结构，以减少电网故障对双馈感应电机的影响。这是通过在电网和发电机之间引入交流斩波器来实现的。由于直接矩阵变换器与转子绕组相连，交流斩波器的硬件工作量最小。这种新型发电机结构的控制是应用方案的主要部分。通过对交流斩波器和矩阵变换器的适当控制，定子电压必须在电网故障期间被控制到参考值，并且不应受电网电压的影响。交流斩波器的换流策略也是本课题研究的一个突出课题。理论工作是伴随着模拟分析和转换器原型的建设。最后，理论分析结果得到了电机试验台架的验证。

项目成果

期刊论文数量（3）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Control of buck-boost direct matrix converter with low voltage ride-through capability

具有低电压穿越能力的降压-升压直接矩阵变换器的控制

DOI：
10.23919/ipec.2018.8507482
发表时间：
2018
期刊：
2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)
影响因子：
0
作者：
Leubner;Hofmann
通讯作者：
Hofmann

One-step commutation approach for direct converters based on UCE-measurement

基于UCE测量的直接变换器一步换相方法

DOI：
10.23919/epe17ecceeurope.2017.8099230
发表时间：
2017
期刊：
2017 19th European Conference on Power Electronics and Applications (EPE'17 ECCE Europe)
影响因子：
0
作者：
Leubner;Köthe;Hofmann
通讯作者：
Hofmann

Dead-Time Compensation Method Based on UCE-Measurement for Direct Converters

基于UCE测量的直接变换器死区补偿方法