Digital Substation is an engineering publication focused on IEC 61850 automation, protection systems, and digital grid intelligence.
IEC 61850 interoperability testing is under way in Utrecht, where equipment and software from multiple suppliers are being integrated into common protection, automation and control applications. Participant reports now cover functional protection tests, network configuration from SCD files and virtualised protection.
Work on harmonizing the Common Information Model (CIM) and IEC 61850 is increasingly focused on formal rules that software tools can process directly. For digital substations, this opens the way to automatic transformation of engineering data and automatic consistency checking between models at different levels.
A new and important mechanism for validating SCL files is emerging in the IEC 61850 engineering process: OCL (Object Constraint Language), a language for formally describing constraints and rules for the objects of an information model.
One run of Tekvel Magic software over SCL data — and you have a ready MS Word document - Signal list: a per-device summary, full detail of every URCB/BRCB control block and an element-by-element breakdown of every DataSet, with signal descriptions taken straight from the SCL. The module runs offline — from an SCD file or a folder of CID files, with no need to connect to the devices. The third case in the series closes the «how do you hand it over» task: handover documentation and as-built documentation in a single run, plus a separate «Configuration findings» document with a lightweight offline audit.
A contractor hands over an SCD file claiming it matches the actual device configuration. But how do you verify that quickly and provably when there are 76 IEDs on site and no permanent monitoring system? A field case from Tekvel: the verification module in the Tekvel Magic software automatically compared the device configurations against the SCD and produced an engineering deviation report covering DataSets, GOOSE, Sampled Values and MMS reports in 15 minutes.
Interoperability testing of substation configuration tools (SCT and ICT) has evolved from a supplementary element of the first IOP in 2011 to the central axis of the entire test programme by 2024. At IOP 2019, only 10 out of 159 ICD files (6.28%) passed validation without errors.
Most digital substation projects are single-vendor, single-site proofs of concept. RTE — the operator of France's 2,600-substation transmission grid — decided to do something harder: build a fully digital, multi-vendor PACS from scratch, act as its own system integrator, and scale it across the entire network.
Top-down IEC 61850 engineering — formalized in TR IEC 61850-90-30:2025 and TR IEC 61850-7-6 (Ed. 2) — moves specification errors from commissioning to the design phase, before a single IED is selected or procured. This article explains the mechanics of the five-step process: what each step produces, what files are exchanged, and why the sequence achieves outcomes the conventional bottom-up approach cannot.
IEC TC 57 Working Group 10 published seven Committee Draft for Vote documents proposing to split the monolithic IEC 61850-7-4 into seven modular parts. The logical node models themselves are not changing — only their structural organisation. Public commenting is open until April 10, 2026.
In 2023, fourteen European TSOs signed a common statement on IEC 61850 engineering and demonstrated a working proof of concept. Their five-step top-down process — backed by two new IEC technical reports — changes how utilities, IED suppliers, and tool vendors interact. Here is what they built and why it matters.
South Africa's Eskom is building a self-healing grid through AI, FLISR, smart metering and microgrids — backed by a R321 billion five-year capex plan. Here's what is actually deployed, what is still being developed, and what the engineering numbers say.
If you have ever opened an SCL file from another vendor and wondered whether it is actually correct — not just well-formed XML, but semantically valid against the IEC 61850 standard — you already understand the problem that OCL is trying to solve.
IEC TC 57 distributed a proposal from ENTSO-E to add some features to IEC 61850 (57/1771/DC).