Power grid event detection and mitigation using phasor measurement units

相量测量单元（PMU）的引入代表了公用事业公司在广泛区域内监测和控制其资产的能力的重大转变。这是由于两个关键因素。第一个是异常高的报告速率-在北美通常是每秒30或60帧，这取决于所使用的标准。这比传统数据收集高出几个数量级，后者依赖于每隔几秒（或几分钟）扫描一次单个设备。PMU的第二个主要优点在于通过基于GPS的定时实现系统电压和电流的全局同步采样。 拟议研究项目的目标是使用这些新设备，通过1）增强对重大系统事件的识别（例如，发电机或线路中断）和2）响应于所识别的事件的广域控制。此外，该提案要求在当地安装和测试商业PMU，以确保数据质量和延迟足够。 预计这一项目将带来若干好处。首先，在系统事件发生时快速识别系统事件的能力将为Hydro One系统运营商提供更好的态势感知，这是防止电网故障的关键组成部分。此外，开发对这种事件作出反应的自动控制方案将减少系统恢复所需的时间，并最终提高整个系统的可靠性。

The introduction of phasor measurement units (PMUs) represents a significant shift in the ability of utility companies to monitor and control their assets over a wide area. This is due to two key factors. The first is an unconventionally high reporting rate---typically 30 or 60 frames per second in North America, depending on the standard used. This is orders of magnitude higher than legacy data collection, which relies on scanning individual devices every few seconds (or minutes). The second major benefit of PMUs lies in the utilization of globally-synchronized sampling of system voltages and currents, achieved via GPS-based timing. The goal of the proposed research project is to use these new devices to improve system reliability via 1) enhanced identification of significant system events (e.g., generator or line outages) and 2) wide-area control in reaction to identified events. In addition, the proposal calls for the local installation and testing of a commercial PMU to ensure that the data quality and latency is sufficient. There are several benefits anticipated as a result of this project. First, the ability to quickly identify system events as they occur will provide Hydro One system operators with improved situational awareness, a critical component in preventing power grid failures. Furthermore, development of automatic control schemes that respond to such events will reduce the time it takes for the system to recover and, ultimately, improve overall system reliability.