Protection, Control and Optimal Operation of Microgrids with Renewable Generation

微电网是通过协调配电网一部分中分布式发电机（DG）、储能设备和可控负载的运行而形成的，使得其可以与电网并联运行或作为自治电力岛运行。微电网提供了一种有吸引力的结构，以整合基于可再生能源和节能技术的小规模发电，例如热电联产（CHP）发电和需求响应负载。然而，在实施微电网时遇到了一些技术挑战，特别是当发电来自间歇性来源时，例如风能和太阳能光伏（PV）。这些挑战包括在并联和孤岛运行模式下协调微电网中的故障保护;当发电机故障电流贡献有限时检测故障;孤岛微电网中能量存储和发电资源的最佳使用;以及控制发电和能量存储以确保干扰期间的电压和频率稳定性。我的研究旨在开发一系列有效和经济的保护解决方案，适用于使用同步相量测量，故障产生的瞬态信号和混合方法的各种微电网设计。该研究还将开发成本效益的控制和通信结构，以实现微电网中的保护和控制功能，以及优化可再生能源利用的能源管理策略。作为研究的一部分，还将开发一个微电网测试床，通过硬件在环模拟来促进新技术的测试。预期成果是强大的保护，控制和运营战略，使微电网的广泛实施。我的研究计划预计将提供五个博士学位的培训。和两名理学硕士

A microgrid is formed by coordinating the operation of distributed generators (DGs), energy storage devices, and controllable loads in a section of distribution grid so that it can operate in parallel with the grid or as an autonomous power island. Microgrids provide an attractive structure to integrate small-scale generation based on renewable energy resources and energy efficient technologies such as combined heat and power (CHP) generation, and demand responsive loads. However, there are several technical challenges encountered in implementation of microgrids, especially when the generation is from the intermittent sources such as wind and solar photovoltaic (PV). These challenges include coordination of the fault protection in microgrids during both parallel and islanded modes of operation; detection of faults when the generators have limited fault current contributions; optimal use of energy storage and generation resources in islanded microgrids; and control of generation and energy storage to ensure voltage and frequency stability during disturbances. My research aims to develop a range of effective and economical protection solutions suitable for variety of microgrid designs using synchrophasor measurements, transient signals generated by faults, and hybrid approaches. This research will also develop cost effective control and communication structures needed to implement the protection and control functions in a microgrid, and energy management strategies for optimizing the utilization of renewable energy resources. As part of the research, a microgrid test bed that facilitates testing of new technologies through hardware-in-loop simulations will also be developed. The expected outcomes are robust protection, control and operational strategies that enable widespread implementation of microgrids. My research program is expected to provide training to five Ph.D. and two M.Sc. students.