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Luc Hossenlopp

PS2 Q3 How does the introduction of IEC 61850 logical nodes and devices impact the specification and engineering process ?. Luc Hossenlopp. Specification & engineering processes. SYSTEM SPECIFICATION. SYSTEM DESIGN. SYSTEM CONFIGURATION. SYSTEM TESTS. SYSTEM MAINTENANCE.

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Luc Hossenlopp

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  1. PS2 Q3How does the introduction of IEC 61850 logical nodes and devices impact the specification and engineering process ? Luc Hossenlopp

  2. Specification & engineering processes SYSTEM SPECIFICATION SYSTEM DESIGN SYSTEM CONFIGURATION SYSTEM TESTS SYSTEM MAINTENANCE Describe the system as a black box: overall functions and external interfaces Define the architecture and integrate constraint from imposed devices Populate the database and set-up platform Check that the specification is fulfilled Identify and fix faults, update system

  3. No need to be an expert in IEC 61850 standard System specification impact • Possibly nothing ! • IEC 61850 is a mean, not a goal ! • Take advantage of: • Distributed automation: avoid wiring, improve security, etc. • Large communication bandwidth: more data for maintenance and operation • Configuration language: link with other databases (telecontrol, …) • Process bus: avoid wiring • Possibly system security • If the system is interconnected by Ethernet to the remote world

  4. Need for a system architect System design impact • Major change compared to previous technology • Define the architecture • Map the system functions and interfaces with real devices • Reuse standard Logical nodes, possibly extend or add some • Explicit the distributed functions per IED and check the IEDs’ capabilities to process them • Identify the need for proxy to connect non IEC 61850 IEDs, especially for retrofit situation and/or imposed IEDs • Check that IEDs are a priori inter-operable • Define the Ethernet architecture • Check that system performances are matched

  5. Changes are first linked to the capability to supply new engineering tools System configuration impact • Use of the substation configuration language files for the communication part • ICD, SCD, SSD, CID • The rest of the configuration (80%...) is not impacted per se • Graphical (single line diagram, SOE, …) • Automation • Link with other serial communication (SCADA, IEDs) • Etc. • However this comes with a new generation of engineering tools • Object oriented to guarantee overall data consistency between domains

  6. Need to clearly identify the test plan at design stage System tests impact • Another major change compared to the previous technology • Need for inter-operability tests • Not defined in the standard since the standard does not define the functions • Complexity is directly linked to the dataflow between devices • Methodology and tools are essential to be efficient • Cost compromise between re-use of proven inter-operability and design innovations • Software development allocate 30%+ of the costs to tests

  7. Need to set up a maintenance communication infrastructure System maintenance impact • Key opportunity to improve current practices • More data defined by the standard together with a higher bandwidth • Data quality, software and configuration versions, LN health and mode, etc. • Devices self-description • Quick access trough standard browser to device capabilities • Routable network • Use of IP • Need to set-up security infrastructure • Give access to data to each specialist

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