Novel Control of Doubly-Fed Induction Generators for Wind Energy Systems Connected to Weak Grids

风能是增长最快的可再生资源，其中大部分位于输电网薄弱的偏远地区，例如，风力涡轮机为了自身保护而与电网断开，超过6%的相位不平衡本项目的目标是开发一种用于风力发电系统的鲁棒控制器，该控制器能够通过电压异常来在弱电网上可靠地运行in a wide宽range范围. 双馈感应发电机提供了一个极好的机会，以最大限度地减少由于电压不平衡引起的转矩脉动，并通过对转子侧转换器注入的电流和线路侧转换器汲取的电流进行集成控制来控制欠压/过压条件下的无功功率。 这将通过硬件实验室原型来证明。 风力测量设备将安装在部落学院，数据将收集在电网条件。 每年的研讨会将传播有关风力资源的信息。 该项目的智力优势是双馈感应发电机的新型控制，它集成了转矩脉动最小化和无功功率补偿，新的发现是完全可能的。 就更广泛的影响而言，拟议的研究将直接受益于其他应用，例如公用事业规模的惯性储能系统。 这将是一个对教学职业感兴趣的研究生的博士研究。 一个重要的组成部分是与部落学院建立联系，以促进合作和信息传播，帮助部落社区将风能视为重要的经济资源。

Wind energy is the fastest growing renewable resource, much of it located in remote areas with weak transmission grids, where wind turbines are disconnected from the grid for their own protection, for example, beyond an unbalance of six percent in phase-phase voltages.The objective of this project is to develop a robust controller for wind generation systems capable of operating reliably on weak electric grids by riding through voltage abnormalities in a wide range. Doubly-fed induction generators allow an excellent opportunity to minimize torque pulsations due to voltage unbalances, and reactive power control for under/over voltage conditions by an integrated control over the currents injected by the rotor-side converter, and on the currents drawn by the line-side converter. This will be demonstrated by a hardware laboratory prototype. Wind measuring equipment will be installed at tribal colleges and data would be collected on the grid conditions. Yearly seminars will disseminate information regarding wind resources. Intellectual merits of this project are the novel control of doubly-fed induction generators that integrates minimization of torque pulsations and compensation of reactive power, and new discoveries are entirely possible. In terms of broader impacts, the proposed research will directly benefit other applications, such as in utility-scale inertial energy storage systems. This will be the PhD research of a graduate student interested in a teaching career. A strong component is to establish ties with tribal colleges to promote collaboration and dissemination of information, helping tribal communities regard wind as a significant economic resource.