Mitigation of Power System Oscillations

电力系统中的振荡是由于诸如发电量的突然变化、大负荷的突然增加或去除、输电线路的停运以及系统故障等干扰而发生的。这些振荡，如果没有在可接受的时间内消除，在过去会导致大停电，并损坏电力系统中昂贵的设备。振荡的存在也限制了电力公司之间输出或输入的能量，导致收入损失。振荡可以是不同的类型。最常见的是机电振荡，它涉及大型旋转机器在整个传输网络中相互振荡。这些振荡具有0-5 Hz范围内的低频。另一种类型被称为次同步振荡，其频率可以高达标称系统频率（50或60 Hz）。这些振荡在过去不太常见，但由于可再生能源通过电力电子接口的集成，它们变得越来越常见。 目前，没有程序或工具可用于直接设计振荡缓解控制器，以满足现代电网。我将使用状态空间控制设计技术和优化技术，提出经过良好测试的新程序，使公用事业公司，制造商和顾问开发可靠和成本效益的解决方案。根据该计划培训的HQP将获得电力系统仿真技术和工具的专业知识。他们还将通过与业界的合作，将新技术应用于实际情况。**

Oscillations occur in power systems due to disturbances such as sudden changes in generation, the sudden addition or removal of large loads, transmission lines going out of service, and faults in the system. These oscillations, when not eliminated within an acceptable time, have led to major blackouts in the past, and damaging expensive equipment in the power systems. The presence of oscillations also restricts the amount of energy exported or imported between power utilities, resulting in loss of revenue. Oscillations can be of different types. The most common is electromechanical oscillations, which involves large rotating machines oscillating against each other across the transmission network. These oscillations are of low frequency in the range of 0-5 Hz. The other type is known as sub synchronous oscillations of which the frequency can be up to the nominal system frequency (50 or 60 Hz). These oscillations have been less common in the past, but due to the integration of renewable sources through power electronic interfaces they are becoming more common. Currently there is no procedure or tools available to directly design oscillation mitigating controllers to cater for the modern power grid. I will use state space control design techniques and optimization techniques to propose well tested new procedures to enable the utilities, manufacturers, and consultants to develop reliable and cost effective solutions. The HQPs trained under this program will gain expertise in power system simulation techniques and tools. They will also apply the new techniques to practical situations through collaborations with the industry. **