Series on Digital Secondary Systems Based on IEC 61850

IEC 61850 engineering practices provide non-vendor specific and interoperable methods to configure programmable electronic devices to communicate within a network of interconnected devices. The multiple parts of the IEC 61850 communications standard describe methods for station bus (SB) communications using human to machine (H2M) and client-server protocols to perform tasks including SCADA, reporting, and engineering access. Additionally, the standards describe process bus (PB) communications using machine to machine (M2M) or peer to peer (P2P) protocols to transfer process level signals for tasks including fault detection, interlocking, and protective tripping. To maintain continued support of other existing and future capabilities, IEC 61850 harmonized with work previously done within the Utility Communications Architecture (UCA) IEEE TR 1550 to include IEEE 802.1 Ethernet, object-oriented databases, and compatibility with any other technology through standardization of data processing based on the seven-layer open systems international (OSI) information exchange models. Because of this inclusive standardization, data modeling and protocols within IEC 61850 have evolved over the past 20 years, remain interoperable with methods including Modbus, DNP3, and MIRRORED Bits Communications, and support newer innovations like traveling wave fault location and time-domain protection by design.

All Webinars in the Series:

  1. Studies of Digital Secondary Systems (DSS) - On Demand! 
  2. Fundamentals of Ethernet in DSS - On Demand! 
  3. Object-oriented Data and Standardized Data Models - On Demand! 
  4. Dataflow Design of DSS - On Demand!
  5. Engineering Processes for Digitization of Substations - 6/2/2022
  6. Methods to Increase Resiliency of  Communications - 6/16/2022
  7. Monitor, Troubleshoot, and Service DSS - 7/14/2022

 

Part 5 - Engineering Processes for Digitization of Substations

Presented by: David Dolezilek

Digital-based secondary systems (DSS) that are evolving to provide new and better ways to protect and control the primary system, leverage the digital capabilities and resilience of intelligent electronic devices (IEDs) within the secondary system of the energy control system (ECS).  First principles of the process level primary equipment, in combination with the utility purpose and focus, support to an organized effort directed at analyzing features, systems, equipment, and material selections.  Value engineering principles support achieving essential functions at the lowest life cycle cost consistent with required performance, quality, reliability, and safety.  Although best-known methods frequently change as new innovations become available, the underlying first principles of both the power system primary and secondary systems do not change. This session introduces the workflow to harmonize the digitization of P&C standard operating procedures to make best use of added capabilities, information, and detail.

Live Webinar: Thursday, June 2 at 11 am EDT Register Now!

Replay: Saturday, June 4, 2022 at 9:00am UTC + 8 Beijing Register for Replay


 

Part 6 - Methods to Increase Resiliency of  Communications

Presented by: David Dolezilek

This session discusses Ethernet as best-effort service providing basic packet delivery services without guarantees.  It attempts delivery to the destination data link layer but takes no steps to recover packets that are lost or misdirected.  To improve resilience of the applications, designers must both add protocol mechanisms at higher levels of the OSI stack to compensate for lost or delayed packets and technologies within the communications network to detect Ethernet faults and take corrective action.  Packet management for IEC 61850 protocols are enhanced via IEEE and IEC proprietary and non-proprietary methods and resilience of the communications network is improved by compensating for Ethernet failures within data flow paths.  IEC 62439 Part 1 describes resiliency via recoverability methods including spanning tree algorithm (STA) and software defined networking (SDN) without human interaction.   IEC 62439 Part 3 describes non-resilient, repairable Parallel Redundancy Protocol (PRP) or High-Availability Seamless Redundancy (HSR) where faults are detected and repaired by human interaction.

Live Webinar: Thursday, June 16 at 11 am EDT Register Now!

Replay: Saturday, June 18, 2022 at 9:00am UTC + 8 Beijing Register for Replay


 

Part 7 - Monitor, Troubleshoot, and Service DSS

Presented by: David Dolezilek

Live Webinar: Thursday, July 14 at 11 am EDT Register Now!

Replay: Saturday, July 16, 2022 at 9:00am UTC + 8 Beijing Register for Replay


In case you missed it: 

 

Part 1 - Studies of Digital Secondary Systems (DSS)

Presented by: David Dolezilek

This webinar will provide an outline of IEC 61850 methods within the broader context of the digital transformation of energy control systems (ECS). Functionality and communications topologies of several common DSS methods used around the world to replace RTUs and traditional substation wiring practices will be presented. Future webinars will introduce the fundamentals of Ethernet in DSS, object-oriented data and standardized data models, dataflow design, engineering processes of digitization of substations, methods for communications resiliency, and features to monitor, troubleshoot, and service DSS installations.

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Part 2 - Fundamentals of Ethernet in DSS

Presented by: David Dolezilek

IEC 61850 engineering practices define packetized Ethernet as a method for defining human to machine (H2M) and machine (M2M) or peer to peer (P2P) protocols. To enable interoperability among suppliers, IEC 61850 describes the use of nonproprietary manufacturing messaging specification (MMS) protocol and proprietary parallel redundancy protocol (PRP) from another standard (IEC 62439). IEC 61850 assures backward and forward compatibility and solution flexibility and durability by enforcing those defined methods co-exist with other methods not defined by IEC 61850 including hardwiring field contacts, nonproprietary distributed network protocol (DNP), and proprietary MIRRORED Bits Communications. IEEE 802.1 Ethernet defines generic connections where messages are published into the Ether, without device flow control, where Ethernet switches use “best-effort” buffer, store, and forward methods to send them toward their destination(s).

In this session we will

Discuss using Ethernet for DSS messaging

Understand use of IEEE 802.1p priority and IEEE 802.1Q virtual LAN methods

Evaluate Ethernet connections, cabling, duplication, and redundancy

 

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Part 3 - Object-Oriented Data and Standardized Data Models

Presented by: David Dolezilek

In the late 1990s, to maintain continued support of other existing and future capabilities, IEC 61850 harmonized with work previously done within the Utility Communications Architecture (UCA) IEEE TR 1550. This included IEEE 802.1 Ethernet, object-oriented databases, and compatibility with any other technology through standardization of data processing based on the seven-layer open systems international (OSI) information exchange models. This third installment of the web series introduces object-oriented data and standardized data models as part of the inclusive information access standardization and protocols within IEC 61850. Because the standard enforces technical co-existence, other methods that have evolved over the past 20 years including Modbus, DNP3, MIRRORED Bits Communications, IEEE 1588 precision time protocol, IEC 62439 parallel redundancy protocol remain interoperable with IEC 61850.

 

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Part 4 - Dataflow Design of DSS

Presented by: David Dolezilek

A Data Flow Diagram (DFD) is a graphical representation of the “flow” of data and is the important preliminary step used to create an overview of the system and is elaborated by another, more detailed DFDs, each more granular, to visualize the complete view of the data flow.  Lowest level DFD is the communications protocol diagram (CPD) which shows the protocol to be used and the media.  Once all the data sources, destinations, and data flow attributes are understood, protocols are considered to support each flow.  Protocol selection considers human to machine H2M or machine to machine M2M, source (standard development organization SDO, standard related organization SRO), proprietary/non-proprietary nature, and cyber defense properties.  This fourth installment explains how protocols are often chosen for other reasons and may not support all the attributes identified in the DFDs and so it is necessary to revisit them and the design choices until the requirements are modified to match the protocols.

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INTENDED AUDIENCE: 

All utility, supplier, and consultant executives, managers, supervisors, engineers, and technicians will benefit from the overview of the use of Ethernet and IEC 61850 in modern protection and control systems


ABOUT THE SPEAKERS

DavidDolezilek crop 2CDavid Dolezilek is a Principal Engineer at Schweitzer Engineering Laboratories, Inc. (SEL), and has three decades of experience in electric power protection, automation, communication, and control. He develops and implements innovative solutions to intricate power system challenges and teaches numerous topics as adjunct faculty. David is a patented inventor and continues to research and apply first principles of mission-critical technologies. Dolezilek has authored over 80 technical papers, many based on the practical use of IEC 61850 engineering processes and has taught digital transformation of energy control systems in over 50 countries.  David is a founding member of the DNP3 Technical Committee (IEEE 1815) and as a founding member of UCA2 he helped to migrate that work to become the IEC 61850 Communications standard.  As such, he is a founding member of both IEC 61850 Technical Committee 57 and IEC 62351 for security. He is a senior member of IEEE, the IEEE Reliability Society, and several CIGRE working groups.



Tags & Topics for This Webinar:

Digital Secondary Systems, IEC 61850, Ethernet, Station Bus, Process Bus, Digital Trip Circuits, Programmable Electronic Relays, Merging Units, Intelligent Merging Units

AFTER THE WEBINAR IS PRESENTED

 

 

For any questions, please contact Phyllis Caputo at p.caputo@ieee.org.

To view previous webinars on-demand, visit the IEEE Smart Grid Resource Center


 

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