A Novel Approach to Mitigating Power System Communication Failures

电力公司面临着向终端用户提供可靠电力的挑战，这需要一个可靠的通信网络。本项目研究处理通信网络时变延迟的方法。该项目的智力优势在于为电力系统网络中的控制器引入了一种新颖的数学方法，该方法旨在限制能源消耗，同时减少驱动努力和放松通信要求。该方法适用于广域电力系统阻尼控制，该控制对测量和通信故障具有鲁棒性，而不会降低系统的稳定性和性能。该项目的更广泛影响包括对网络系统科学和大型网络控制系统可靠性的贡献。此外，该项目具有吸引本科生和大学预科学生的特点：关键基础设施的稳定性和控制，最先进的计算机应用，以及与社会问题的高度相关性。该项目将开发一种新方法，以确保在通信故障的情况下电力系统的可靠性和弹性，这种故障会导致控制信号传输中的时变延迟。ppi首次引入时标理论来解决信息传输的间歇性问题，有望对通信系统提供较少的保守性要求。电力系统网络中的信息在网络资源（变电站、控制中心、发电机、执行器、传感器等）之间以确定性和随机的时间间隔进行传输，这是由于执行器的通信不可靠或能力限制所致。其目的是估计在不违反系统稳定性的情况下，信息传输中断持续时间的最大允许值。通过引入确定性和随机时间尺度理论，我们将问题表述为非均匀时域上的连续/离散切换系统，使得系统在连续时间子系统（当通信发生时没有任何中断）和离散时间子系统（当通信失败且控制保持不变且不进化时）之间切换。该理论将通过传感器/执行器网络中的通信通道研究事件触发控制，其中触发时间不是等距的，可能是确定性的或随机的。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Electric utilities face the challenge of providing dependable power to end-users, which requires a reliable communication network. This project investigates approaches to deal with time-varying delays in the communication network. The intellectual merit of the project is based on introducing a novel mathematical approach for controllers operating in a power system network, which are designed to limit energy expenditures while reducing the actuation effort and relaxing communication requirements. The approach is applied to wide-area power system damping controls that are robust to failure in measurements and communications without degrading the stability and performance of the system. The broader impacts of the project include contributions to the science of networked systems and reliability of large network control systems. Moreover, the project has characteristics that undergraduate and pre-college students should find attractive: stability and control of critical infrastructures, state-of-the-art computer applications, and high relevance to societal problems.The project will develop a novel approach to ensure the reliability and resiliency of power systems in the presence of communication failures that introduce time-varying delays in control signal delivery. Time-scale theory is introduced for the first time by the PIs to solve the problem of intermittent information transmission, which shows promise for providing less conservative requirements on the communication system. The information in the power system network is transmitted between network resources (substations, control centers, generators, actuators, sensors, and so on) at deterministic and random time intervals due to communication unreliability or capability limits of actuators. The aim is to estimate the maximum allowable value of the duration of interruption of information transmission that does not violate the stability of the system. We formulate the problem as continuous/discrete switched system on a non-uniform time domain such that the system switches between a continuous-time subsystem (when the communication occurs without any interruption) and a discrete-time subsystem (when the communication fails and the control is held on and not evolving), by introducing deterministic and stochastic time scales theory. This theory will investigate event-triggered controls through communication channels in the context of sensor/actuator networks where the triggering times are not equidistant and may be deterministic or stochastic.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.