Abstract
With the advent of a new Precision Time Protocol specification, new opportunities abound for clock synchronization possibilities within power grid control systems. The third iteration of the Institute of Electrical and Electronics Engineers Standard 1588 specification provides several new features specifically aimed at complex, wide-area deployments in which situational awareness and control require precise time agreement. This paper describes the challenges faced by existing technology, introduces the new time distribution specification, and provides examples to explain how it represents a game-changing innovation.
Highlights
Very large systems, such as national power grids, present many interesting challenges because of their physical size, complexity, and the number of components that comprise them
Because Internet of Things (IoT) sensors and actuators play important roles in real-time monitoring and control applications across industries, time synchronization methods based on the Precision Time Protocol (PTP), the Network Time Protocol (NTP), and the Global Positioning System (GPS) are being considered for incorporation into the Institute of Electrical and Electronics Engineers (IEEE) 1451 family of smart transducer interfaces for sensors and actuators standards, which are applicable to wireless and wired sensor networks and have provisions for connectivity to local-area networks, wide-area networks, and the Internet [7]
The PTP Profile documents the customization of a specific application, such as requiring some features that are optional in IEEE 1588 and/or prohibiting some features that are not needed
Summary
Very large systems, such as national power grids, present many interesting challenges because of their physical size, complexity, and the number of components that comprise them. For such systems, assessing the overall health or even the health of an isolated portion of the overall system can involve many devices that are separated physically. For power systems in particular, phase angle differences (or relative phase angles) on the system provide significant information, but require all of the devices to have a common time base. (Notice: This manuscript was authored by UT-Battelle, LLC, under Contract DE-AC05-00OR22725 with the U.S Department of Energy (DOE). The DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan; accessed on 21 August 2021)
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