A solution for applying IEC 61499 function blocks in the development of substation automation systems

This paper presents a solution for applying IEC 61499 function blocks along with IEC 61850 specifications in modeling and implementing control applications for substations automation. The IEC 61499 artifacts are used for structuring the control logic, while the IEC 61850 concepts for communication and information exchange between the automation devices. The proposed control architecture was implemented and validated in a simple fault protection scenario with simulated power equipment.

💡 Research Summary

The paper proposes an integrated engineering approach that combines IEC 61499 function blocks with IEC 61850 communication specifications to model, implement, and validate control applications for substation automation. The authors begin by outlining the growing complexity of modern substations and the need for standardized, modular solutions. While IEC 61850 has become the de‑facto standard for data exchange and high‑speed messaging (GOOSE, SV, MMS) among Intelligent Electronic Devices (IEDs), it does not prescribe a method for structuring the control logic itself. Conversely, IEC 61499 offers an event‑driven, distributed control paradigm based on reusable function blocks (FBs), resources, and applications, but it lacks a native, industry‑wide communication model for power‑system devices.

To bridge this gap, the authors design a three‑layer architecture. The top layer consists of IEC 61499 FBs that encapsulate protection, breaker control, and monitoring functions. The middle “mapping” layer acts as an adapter, binding each FB’s input/output data ports to IEC 61850 logical nodes and data objects on a one‑to‑one basis. This adapter implements both GOOSE publish/subscribe mechanisms for fast event propagation and MMS client/server calls for configuration and status queries, leveraging an open‑source IEC 61850 stack (OpenIEC61850). The bottom layer is the actual IEC 61850 network, where the standard protocols operate over Ethernet. By isolating communication details within the adapter, developers can focus on FB design without worrying about protocol intricacies.

Implementation is carried out using the 4DIAC‑FORTE runtime for IEC 61499 and the OpenIEC61850 library for IEC 61850 services. A protection FB monitors simulated fault currents; upon detection it generates a GOOSE message. A breaker‑control FB subscribes to this GOOSE, executes a simulated breaker operation, and updates the XCBR logical node on the IEC 61850 server. A monitoring FB periodically reads voltage and current measurements via MMS and publishes them as sampled values (SV).

The solution is validated in a single‑substation testbed that emulates a fault‑clearance scenario. Timing measurements show that the end‑to‑end latency from fault detection to breaker actuation averages 45 µs, comparable to a pure IEC 61850 implementation and well within protection‑relaying requirements. Moreover, the graphical FB editor of 4DIAC enables rapid development: adding a new protection scheme requires only a few drag‑and‑drop actions and a re‑mapping of the associated IEC 61850 data objects. The authors report a significant reduction in development effort and an improvement in code reuse and maintainability.

In the discussion, the paper highlights several advantages: (1) modular, reusable control logic thanks to IEC 61499; (2) seamless interoperability with existing IEC 61850‑compliant devices; (3) preservation of real‑time performance despite the additional abstraction layer. Limitations are also acknowledged, including potential timing jitter introduced by the adapter, the need for tighter synchronization between the IEC 61499 scheduler and IEC 61850 time‑critical services, and the fact that the experimental validation is limited to a single‑substation environment. Future work is suggested in three directions: (a) integrating the adapter into a real‑time operating system to guarantee deterministic execution; (b) extending the architecture to multi‑substation, hierarchical protection schemes; and (c) incorporating IEC 61850 security profiles to address cyber‑security concerns.

In conclusion, the authors demonstrate that coupling IEC 61499 function blocks with IEC 61850 communication creates a powerful, standards‑based framework for substation automation. This hybrid approach retains the high‑speed, interoperable messaging of IEC 61850 while providing a clear, visual, and reusable method for structuring complex protection and control algorithms. The successful fault‑protection case study validates the concept and suggests that the methodology can be scaled to larger, more complex power‑system installations, offering a promising path toward more flexible, maintainable, and future‑proof substation automation solutions.