Applying intelligent fast load shed using IEC 61850 GOOSE

Abstract

Industrial facilities with co-generation are in critical need of load shedding to prevent collapse of the cogeneration assets. Load shedding should be sub-cycle speed to manage thousands of distributed loads within a facility. This paper describes the capabilities of such a fast load shedding scheme spanning across a wide array of relays provided by various vendors and potentially a large quantity, and a case study system and experience of applying such a system. The fast load shed scheme described in this paper utilizes a proven system and makes it easy to configure larger and more complex load shed schemes. The paper describes the proposed architecture of a centralized fast load shed controller-based scheme interfaced with local generator/feeder/transformer/motor protection relays over IEC 61850 GOOSE. A major challenge of such a large-scale load shed scheme deployment is the configuration of devices, especially the IEC 61850 GOOSE engineering process which may add further complexity. This paper also discusses IEC 61850 GOOSE scheme configuration with high-speed performance requirements. Lessons learned from the case study fast load shed scheme deployment, testing and operations are also discussed.