Control Issues in Robust High-efficiency Energy Conversion with Application to Renewable Energy Systems

可再生能源系统中鲁棒高效能量转换的控制问题

• 批准号: RGPIN-2015-03811
• 负责人: Moallem, Mehrdad
• 金额: $ 2.19万
• 依托单位: Simon Fraser University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=659926
• 关键词: Control; Issues; Robust; efficiency; Energy

Modern renewable energy systems (RES) face two main challenges in their evolution: (1) Fundamental sciences and technologies to produce reliable and economical energy sources; and (2) Energy processing technologies for reliable and optimal conversion of energy into usable forms. Although the electronics technology has been perfected in the past decades, it has to be redesigned and adapted to match new challenges. To this end, control, communication, and computing technologies, along with new power electronics converters and devices are expected to become increasingly important in modern RES. An area of particular importance is stable and robust control of intermittent power sources, loads, and energy storage devices. In particular, switching power converters are intrinsically nonlinear, subject to strict input/state constraints, and suffer from various uncertainties. Most existing control methods utilize linearized steady state models that neglect the above constraints or cannot be used to design robust controllers required by intermittent energy sources. Another common feature of RES energy converters is the existence of an optimal power operating point, which is dependable on the available input power and load conditions. To maximally utilize such converters, the power processing stage has to autonomously track the optimal point in a reliable and accurate manner. Furthermore, renewable energy systems often have inherently nonlinear characteristics with significant parametric and dynamic uncertainties. Hence, design methods based on linearization may fail to provide the full benefits of feedback systems due to neglecting nonlinear effects. ***To address the above challenges, the proposed research will investigate the following research topics: (a) Development of innovative extremum seeking algorithms to maximize energy harnessing efficiency through advanced controls; (b) Addressing dynamic stability issues in power electronics converters, including internal dynamics instability of boost converters and negative resistance instability due to constant and variable power loads; (c) Reduction of the number of sensors in power converters and fault tolerant control through advanced signal processing; and  (d) Experimental proof-of-concept validation of the research activities listed in parts (a)-(c) on laboratory scale setups to demonstrate the proposed solutions. This research program is motivated by pressing needs in modern energy conversion technology. As such, it would lead to innovative control design methods for power conversion by addressing some key technology barriers in RES such as stability, sensory requirement, and maximization of energy harnessing capability. The program will make new contributions to the RES literature, develop new expertise, and will further be utilized to initiate collaborative activities with relevant Canadian industries. **

现代可再生能源系统（RES）在其发展过程中面临两个主要挑战：（1）生产可靠且经济的能源的基础科学和技术；（2）将能源可靠且最佳地转化为可用形式的能源加工技术。电子技术在过去几十年中已经日趋完善，必须重新设计和适应新的挑战，为此，控制、通信和计算技术以及新型电力电子转换器和设备预计将在现代变得越来越重要。 RES。特别重要的一个领域是间歇性电源、负载和储能设备的稳定和鲁棒控制，特别是开关电源转换器本质上是非线性的，受到严格的输入/状态约束，并且受到各种不确定性的影响。控制方法利用线性稳态模型，忽略上述约束或不能用于设计间歇性能源所需的鲁棒控制器。RES 能量转换器的另一个共同特征是存在最佳功率工作点，该点取决于为了最大限度地利用此类转换器，功率处理级必须以可靠且准确的方式自动跟踪最佳点。此外，可再生能源系统通常具有固有的非线性特性，并且具有显着的参数和动态不确定性。由于忽略非线性效应，基于线性化的设计方法可能无法提供反馈系统的全部优势***为了解决上述挑战，拟议的研究将调查以下研究主题：（a）开发创新的极值搜索算法最大化。活力通过先进控制提高效率；(b) 解决电力电子转换器的动态稳定性问题，包括升压转换器的内部动态不稳定以及恒定和可变功率负载导致的负电阻不稳定；(c) 减少电力转换器中的传感器数量通过先进信号处理实现容错控制；以及 (d) 在实验室规模设置上对 (a)-(c) 部分列出的研究活动进行实验概念验证，以演示本研究。该计划的动机是现代能量转换技术的迫切需求，因此，它将通过解决可再生能源中的一些关键技术障碍（例如稳定性、感官要求和能量利用能力最大化）来实现功率转换的创新控制设计方法。将为 RES 文献做出新的贡献，开发新的专业知识，并将进一步用于启动与加拿大相关行业的合作活动**。