Checking SCL Files for Improved Interoperability Joe Stevens Triangle MicroWorks

Background on SCL Files What is SCL, how is it defined, and how is it used? Why Check? The benefits of checking SCL Files What Should Be Checked? Important checks that should be covered Resources for Checking SCL Files How you can check your SCL Files Agenda AgendaSCL BackgroundWhy Check?What to Check?Resources

System Configuration description Language (SCL) XML based, self-describing language Configures all IEC devices in the system SCL Definitions Include: IED Capabilities - Services, Control Blocks, Sampled Values, GOOSE Object Models for IED’s – Logical Nodes, Data Objects, Data Attributes, Enums Communication configuration – addressing, Data Sets, GOOSE publishing, External References Substation configuration – voltage levels, bays, equipment, electrical connectivity Background on SCL Files AgendaSCL BackgroundWhy Check?What to Check?Resources

The Benefits of Checking SCL Files Improve the interoperability of devices Reduce time spent testing and debugging Help streamline the engineering process Why Check? AgendaSCL BackgroundWhy Check?What to Check?Resources IED Template ICD Specification SSD System Configuration SCD IED Configuration CID IEC Engineering Process

Many different levels to checking SCL: What Should Be Checked? AgendaSCL BackgroundWhy Check?What to Check?Resources Level 2 – Object Model Resolution Level 1 – Schema Validation Level 3 – Communication Configuration Level 4 – Substation Level Level 5 – Vendor Specific Essential for parsing by devices Easiest to discover with many tools Checking tools can automate Models are large and the standard is long Important for system level communications Only a portion can be checked by tools Important for upfront system specification Checked by Vendor Tools They are all important!

How can you check your SCL Files? 1.Vendor Tools: System Configuration Tools, IED Configuration Tools 2.Third Party Tools: SCL Editors, Configuration Tools, Testing Tools 3.Specific SCL Checking Tools Resources for Checking SCL Files AgendaSCL BackgroundWhy Check?What to Check?Resources Free Web Based Checking at TriangleMicroWorks.com

Overview of Checking Performed: Schema Validation Object Model Resolution Consistency Across Entire File Completeness Compared to the Standard Communication Section GOOSE and Sampled Value Control Blocks Match Access Points and Logical Devices to IED Check for Mismatches in Control Blocks and Services SCL Consistency and Completeness Check AgendaSCL BackgroundWhy Check?What to Check?Resources

Object Model Checks Performed: Ensures that the entire Object Model fully resolves Verifies the Object Model is consistent with the standards Check that mandatory elements are present Check type and functional constraints Find any name, order, and type inconsistencies for LN’s, DO’s, DA’s, Enums Verifies all instance data in IED section: Path is correct and found in object model Initial value is valid based on given type in the object model Verifies that Data Set paths resolve in the Object Model Verify that Control Blocks refer to an existing Data Set in the model IEC , -7-3, -7-4, (Hydro), (DER), (Wind Turbines) SCL Consistency and Completeness Check AgendaSCL BackgroundWhy Check?What to Check?Resources

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