IEC 61850 Seminar for Protection and SCADA Engineers in Dammam (KSA) on 18-21 October 2015

FMTP, Al-Ojaimi Energy Services and NettedAutomation offer a public IEC 61850 Seminar with practical demonstrations:

18-21 October 2015
at Novotel Hotel, Dammam Business Park

Click HERE for the Brochure and registration information.

Next IEC 61850 Training Opportunities in English and German

One of the crucial issues in Understanding IEC 61850 and IEC 61400-25 is education. NettedAutomation GmbH (Karlheinz Schwarz) has trained almost 4,000 experts from all over. We offer you the best courses ever conducted.

The other day I received this feedback:

It should be a seminar for the … partners with relation to IEC 61850 in the project (about 20 people) and hosted at xx in xxx – hopefully some time before the end of the year when the project ends.

We see you as the best candidate for providing this seminar and would therefore like to start a dialog on your conditions for this, like draft agenda, availability and price.

and:

The ultimate goal is to have … tools for training people into using IEC61850.
Keep on the good work Karlheinz. I’m a big fan of yours.

We have scheduled several public training courses in German and English. The courses in English are conducted by Andreas Bonetti (FMTP, Senior protection engineer) and Karlheinz Schwarz; the courses in German are conducted by Karlheinz Schwarz

Karlsruhe (Deutsch, Karlheinz Schwarz):
02-04 Dezember 2015
11-13 Januar 2016
07-09 März 2016 (neues Datum)

Karlsruhe/Germany (English, Andrea Bonetti and Karlheinz Schwarz):
13-16 October 2015
18-21 April 2016 (new date)
10-13 October 2016

Stockholm/Sweden (English, Andrea Bonetti and Karlheinz Schwarz):
15-17 March 2016
19-22 September 2016

Dammam City/SA (English, Andrea Bonetti and Karlheinz Schwarz):
18-21 October 2015 EN 

Hong Kong (English, Andrea Bonetti and Karlheinz Schwarz):
17-19 November 2015

ALL:

2015:
13-16 October 2015 EN Khe
18-21 October 2015 EN Dammam City
17-19 November 2015 EN Hong Kong
02-04 Dezember 2015 DE Khe
11-13 Januar 2016 DE Khe
2016: 
07-09 März 2016 DE Khe (neues Datum)
15-17 March 2016 EN Sto
18-21 April 2016 EN Khe (new date)
19-22 September 2016 EN Sto
10-13 October 2016 EN Khe

Click HERE for more details on the courses in Deutsch.
Click HERE for more details on the courses in English.

Contact us by email in case you have any question.

What is an IEC 61850 Data Model – Come and See

Data or device modeling is a crucial feature of IEC 61850 and IEC 61400-25. You may have seen many different approaches to explain how such a model looks like. Some five years ago I used these Russian dolls (matryoshka doll):

An IED contains a lot of “inner” objects.

 

Today I have thought that another approach may help you to understand the IEC 61850 approach:

What do you think? This and more will be explained in detail during my comprehensive – most liked – courses.

IEC 61850-7-410 Extended Models for Conventional Power Plants

IEC TC 57 just published a FDIS defining extensions for conventional power plants and steam turbines:

IEC 61850-7-410 A1 (57/1607/FDIS): Amendment 1 to IEC 61850-7-410 Ed.2:
Communication networks and systems for power utility automation –
Part 7-410: Basic communication structure – Hydro-electric power plants – Communication for monitoring and control

Voting closes 2015-10-09.

The following new Logical Node classes are added to the Hydro Power model standard IEC 61850-7-410 Ed2:

LN	Description
ASEQ	Generic control action sequencer
EBCF	Block control function. This LN will represent one physical device that coordinates the control of the thermal pressure of the steam generator and the electrical power regulation of turbine / generator system.
EFCV	Fuel control valve. This LN will represent the physical device of fuel control valve related to the gas turbine in a thermal power plant.
EGTU	Gas turbine production unit. This LN represents the physical device of the GT and the generator combination in a thermal power plant. It is intended as an extended rating plate that allows settings of data. It also acts as a placeholder for the current operating conditions of the unit.
ESCV	Steam control valve. This LN will represent the physical device of inlet control valve of the steam turbine in a thermal power plant.
ESPD	Speed monitoring. This LN is derived from HSPD.
ESTU	Steam turbine production unit. This LN represents the physical device of the ST and the generator combination in a thermal power plant. It is intended as an extended rating plate that allows settings of data. It also acts as a placeholder for the current operating conditions of the unit.
EUNT	Thermal unit operating mode. The present status of the production unit.
FDBF	Dead-band filter. This LN represents a settable filter for dead-band.
FMTX	Trip matrix. This LN represents a matrix for linking various trip functions to equipment that shall be tripped or controlled during a fault.
GUNT	Production unit operating mode. The present status of the production unit.
PTUR	Used for detection of under resistance, e.g. due to stator or rotor earth-faults.
SECW	Supervision of electrical conductivity in water. This logical node represents a system for monitoring of electrical conductivity in water.
TECW	Measurement of electrical conductivity in water. This logical node represents a generic device for measuring the conductivity in water.

DataObjects for settings of, e.g., the LN ESTU comprise:

TurTyp	Turbine type (steam, gas, oil)
SpdRtg	Turbine rated speed [s–1]
TurInert	Turbine moment of inertia J [kgm2]
TurTrsSpd	Maximum transient overspeed [s–1]
TurRwySpd	Runaway speed [s–1]
TurPwrRtg	Rated power in turbine mode [MW ]
FlwRtgTurb	Rated flow in turbine mode [kg/s]
HiPresMax	High pressure inlet maximum pressure [Pa]
IpMax	Intermediate pressure inlet maximum pressure [Pa]
LoPresMax	Low pressure inlet maximum pressure [Pa]
HiPresVlv	High pressure control valve rated oil pressure [Pa]
HpVlvClsTms	High pressure control valve rated closing time [s]
IpVlvPres	Intermediate pressure control valve rated oil pressure [Pa]
MidVlvClsTms	Intermediate pressure control valve rated closing time [s]
LpVlvPres	Low pressure control valve rated oil pressure [Pa]
LpVlvClsTms	Low pressure control valve rated closing time [s]
IcpVlvPres	Intercept valve rated oil pressure [Pa]
MainStmTmpRtg	Turbine rated main steam temperature
RhStmTmp	Re-heat steam temperature
IcpVlvTms	Intercept valve rated closing time [s]

New Work Proposal IEC 61850-9-3 approved

The new work Proposal has been approved:

IEC/IEEE 61850-9-3 Ed.1 (57/1611/RVN):
Communication networks and systems for power utility automation –
Part 9-3: Precision time protocol profile for power utility automation

Click HERE for some more information.

IEC 61850-90-6: Use of IEC 61850 for Distribution Automation Systems

IEC TC 57 has published a very interesting 140 page document describing the use of IEC 61850 for distribution automation:

Draft IEC TR 61850-90-6 (57/1615/DC):
Communication networks and systems for power utility automation
Part 90-6: Use of IEC 61850 for Distribution Automation Systems

Distribution Automation and Feeder Automation Distribution Automation (DA) as a concept emerged in the 1970s to promote the application of computer and communications technologies for improving of distribution system operating performance. It is in general used as an umbrella term to describe the deployment of automation technologies for protection, control, monitoring, and operation of distribution systems.

The current document mainly describes the following functions of Distribution/Feeder Automation Systems:

• DSCADA (Distribution-Supervisory Control And Data Acquisition) This function allows the operator to monitor and control the distribution networks remotely. It is a basic function of DASs.
• FLISR (Fault Location, Isolation and Service Restoration) It includes the FLISR using auto reclosers and auto-sectionalizers, the FLISR based on the centralized control of the master station and the FLISR based on the distributed control scheme in which field IEDs exchange fault and control information through a peer to peer communication network. These are main typical implementation/architecture for supporting the FLISR. The reality may be the mix all these three modes.
• VVC (Voltage and Var control) The objective of VVC is to minimize the power losses in the network, improve the voltage profile, or both, using the settings of LTC substation transformers, bus/feeder voltage regulators and switching shunt capacitors. More advanced VVC applications may also use the active and reactive power injection by the DER units as well as distribution FACTS devices such as D-STATCOM and D-SVC. The auto-recloser function has to be blocked. Only the basic VVC scenario which only involves the control of voltage regulators and switching shunt capacitors is considered in this report.
• Anti-Islanding Protection Based on Communications In case of the feeder circuit breaker opens, an unintentional islanding may have been created. The involved DER in the island has to been forced to stop energizing the feeder for workers safety, system security and power quality reasons. While the islanding detection methods using local measurements at intertie may have none-detection zone, the anti-islanding protection can be improved through detecting the tripping of substation breakers and transmitting this information down to the feeder

A DA system may comprise up to tens of thousands of IEDs spreading over a wide area distribution network. From time to time, the new IEDs may be introduced, and the configuration of existing IEDs may need to be modified. The current configuration method for substation automation systems may need extended configuration methods. Therefore, a use case for installing new IEDs and updating the configuration of existing IEDs will also be described in this section.

In order to precise the various use-cases, the document contains sequence diagrams, e.g., for Fault Location:

The standard series IEC 61850 is THE standard for power systems.

ENTSO-E Strongly Supports IEC 61850 for Substation Automation

ENTSO-E (European Network of Transmission System Operators for Electricity) wants to become “an important stakeholder in the IEC 61850 improvement process and will actively contribute, mainly through the profiling work of the IEC 61850 standard.”

ENTSO-E has just published an update on their current and future support of IEC 61850.

I very much appreciate the efforts of the European Transmission System Operators!

Click HERE for the latest news.

The electrical power delivery system is composed of many other domains that are beyond the substations in transmission systems:

• Conventional Power Generation
• Wind Power Plants
• Hydro Power Plants
• Distribution systems
• Renewable Energy Resources
• Load centers (like factories, petro chemical plant, …)
• Power quality monitoring
• Virtual Power Plants
• Primary, secondary, and tertiary control
• Load shedding
• …

IEC 61850 is about to be used in all of these application domains – to become a Seamless Information Exchange System.

Many pilot implementations and tests are underway in these domains. Usually using proprietary Information Exchange System, because the main objectives of these projects are mainly related to power system dynamics and stability – one way or the other. Later they figure out: Hey, we have a very successful project … but created many proprietary, non-interoperable Information Exchange Systems.

It is highly recommended to use IEC 61850 from the scratch! Because this is THE standard. There is usually no need to spend money and time to develop something specific for one use case.

On my radar screen I see many people starting to use IEC 61850 – users and vendors … and system integrators. All over.

Resume: ENTSO-E is just ONE of MANY efforts to apply IEC 61850.

SCL Schema Accessibility in the near future

The SCL schema is published as part of the delivery of edition 1 and edition 2 of part 6. The publication of a Technical Corrigendum to IEC 61850-6 Ed. 1 and Ed. 2 is under way.

To provide an easier way to retrieve the latest version of the Schema a new possibility to access the Schema from the IEC Website is proposed in the document (57/1604/DC): Latest version of SCL schema and planned publication of a Technical Corrigendum to IEC 61850-6 Ed. 1 and Ed. 2.

This process is already proposed for the first corrigenda of part 6 and from Edition 2.1 onwards.

Please note: Currently the following valid schema files are currently used for conformance testing of IEC 61850:

- For Edition 1 of IEC 61850-6: SCL 1.7
- For Edition 2 of IEC 61850-6: SCL.2007B

IEC 61850-80-4 Translation from COSEM to IEC 61850

IEC TC 57 just published the draft Technical Specification (57/1602/DTS):

IEC 61850-80-4 TS:
Communication networks and systems for power utility automation –
Part 80-4: Translation from COSEM object model (IEC 62056) to the IEC 61850 data model

Voting terminates on 2015-10-30

This part defines the one-to-one relationship of IEC 62056 OBIS codes to IEC 61850 Logical Nodes. The purpose is to increase the availability of revenue meter information to other applications defined within the IEC 61850 framework. This increased visibility will contribute to information available for smart grid applications.

IEC 61850-90-8 Models for Electric Mobility

IEC TC 57 just published the 70+ page draft (57/1603/DTR) for comments:

IEC 61850-90-8 TR:
Communication networks and systems for power utility automation –
Part 90-8: Object model for electric mobility

Voting terminates on 2015-09-25

This technical report describes how current standardization for Electric Road Vehicles (EV) and the Vehicle-to-Grid Communication Interface can be linked to IEC 61850-7-420 standard for Distributed Energy Resources (DER). The technical report provides necessary background information and proposes an object model for E-mobility in order to establish an EV plugged into the power grid as DER according to the principles of IEC 61850-7-420. The basic information modeling in IEC 61850 and IEC 61850-7-420 already covers a lot of needs for the e-Mobility domain. Missing parts can be modeled as new logical nodes and data objects, which this technical report defines.

Scope
The scope of this document is to show how IEC 61850-7-420 can be used to model the essential parts of the E-mobility standards related to Electric Vehicles and Electric Vehicle Supply Equipments (IEC 62196, IEC 61851, IEC 15118) and the Power system (IEC 61850-7-420), in order to secure a high level of safety and interoperability.

Here is an overview about the topology of the logical nodes required (existing and new ones):

Standards are key for E-Mobility and many other power application domains.

NEWS on IEC 61850 Conformance Test Labs

The following nine new IEC 61850 Test services have been approved by the UCAIUG in during the first half of 2015:

Level A
IEC 61850 Conformance Test for 2nd Edition Server Products

• Korea Electrotechnology Research Institute (KERI) [January 2015]
• TÜV SÜD (Munich, Germany) [January 2015]
• Xuchang KETOP, Testing Technology Co.,Ltd, Xuchang, China [February 2015]

Level B
IEC 61850 Conformance Test for 2nd Edition Server Products

• ALSTOM GRID UK Ltd, Substation Automation , Stafford (UK) [July 2015]

Level A
IEC 61850 Conformance Testing Sampled Values 9-2LE Publisher

• Xuchang KETOP, Testing Technology Co.,Ltd, Xuchang, China [March 2015]
• TÜV SÜD (Munich, Germany) [March 2015]

Level A
Edition 2 Client Systems

• DNV GL – Energy (KEMA), Arnhem (Netherlands) [April 2015]
• TÜV SÜD (Munich, Germany) [July 2015]
  

LEVEL B
IEC 61850 Conformance testing Edition 1 Server Products

• ALSTOM GRID UK Ltd, Substation Automation , Stafford (UK) [July 2015]

A total of 479 Certificates for Server Ed1 (47 for clients) and 21 for Server Ed2 (1 for clients) have been issued by July 2015.

Click HERE to access the testing information (requires user name and password – at least you need a guest account).

Security – Hacking a Car is round the corner

I guess you have read or heard the news about the Hackers that took remote control of a car on the highway. Two researchers exploited a zero-day vulnerability in a Jeep Cherokee’s Uconnect infotainment system to gain wireless control of the car.

Click HERE for the report.

You may be happy to drive a car manufactured “before Internet” hit the road. Now, you can see that the Internet can seriously “hit the road” !

Fortunately there are people that have expected this to happen. Some of them in the USA have already become active: The world’s first automotive cyber-security law may force automakers to deliver software updates and stop vehicle tracking as part of new IT security standards regarding connected cars in the US.

Click HERE to read more background information on the new US Senate Bill.

Click HERE for the Senate Bill.

The number of cars is much bigger than the number of substations – in the USA and in Europe … and all over. It is very likely (from my point of view) that the automobile industry will develop very soon international standards for the Security and Privacy in Cars. I expect that such a development will impact also the discussion on security for power delivery systems. The damage that could be caused by hacking a electrical delivery system could be much higher than turn-on the air-condition in a car.

I have experienced more than 30 years ago that the automakers are strong in introducing standards: The GM led the project MAP (Manufacturing Automation Protocols). Unfortunately manufacturers of automation equipment decided not to follow GM’s vision.

With regard to security, I hope that the automakers will help to bring more security to any kind of smart devices: in cars, in homes, in factories, in substations and …

In case of somebody taking over a car, it may be very dangerous to securely bring a (or even many) cars to a hold. But bringing a part of a power system to a hold means: BLACKOUT!! The “SECURE” state: “STOPPED” means: no power!

In case of a stopped car, you may take the next bus or just walk. A stopped power delivery system must be brought back to operation using again thousands of smart devices. Have you ever asked yourself how many smart network-connected computers are involved in power delivery systems? The number goes into the many millions …

Discuss security issues with your colleagues and your management. And maybe contract with experts …

Learn How Three Big U.S. Utilities Gained Experience With IEC 61850

The three well known U.S. utilities New York Power Authority (NYPA), Kansas City Power and Light (KCP&L), and Southern California Edison (SCE) have recently gained experience with IEC 61850 applications through various projects. Don Von Dollen (EPRI) and Erich Gunther (EnerNex) have given various answers on a very crucial question: “Why is IEC 61850 used all over the world – but not that much in the U.S.?”

The main outcome of their investigation is:

• Need extensive training to the workforce.
• Take advantage of help from other utilities and entities (consultants, …).
• Cross-vendor configuration is burdensome.
• Case studies and implementation profiles needed.
• Participate more in the UCAIug 61850 User Group
• Build a strong test-lab.

I fully agree with Erich!

The main reason for the slow progress in the U.S. is (from my point of view) related to the misinterpretation what IEC 61850 really is. Most people still believe that it is something like DNP4.0 – DNP3.0 plus … Which is totally wrong!

My experience – after some 4.000 – experts educated in IEC 61850 is this: Teamwork (of smart engineers) makes the Dream work!

Erich Gunther has presented a one hour webinar on the subject on July 14, 2015.

Click HERE to listen to Erich’s one hour presentation.
Click HERE for a copy of his slides [pdf].
Click HERE for a paper written by Erich on the subject [pdf]

The need of smart and well educated engineers is required independent of the approach:

1. Build turn-key substations (most big vendors support this) or
2. Utility-driven design, configuration, commissioning and test … and operation.

After last weeks 4 day training for a big South-American utility that applies the second approach, I see an increasing need for more vendor-independent training for protection and SCADA applications in substations.

We are here to help you in this regard:

NEW Training Opportunities for IEC 61850, IEC 61400-25, IEC 60870-5-104, and IEC 62351

An Approach to Developing Power Grid Control Systems with IEC 61850 and IEC 61499 and Holonic Control

An interesting paper discusses the combined use of IEC 61850 and IEC 61499:

An Approach to Developing Power Grid Control Systems with IEC
61850, IEC 61499 and Holonic Control

by Valentin Vlad, Corneliu Buzduga, and Calin Ciufudean (University of Suceava, Romania)

WSEAS TRANSACTIONS on SYSTEMS, Volume 13, 2014

This paper presents some models and concepts for developing smart power grid control systems based on holonic concepts and the open standards IEC 61850, IEC 61499. Along with the proposed holonic models for different levels of control, we present a simple fault protection application illustrating how the IEC 61499 artifacts can be used for modeling and implementation of IEC 61850 compliant applications.

Click HERE for the above paper.

Additional information of using IEC 61850 and IEC 61499 in Distributed Power Systems:

Distributed Power System Automation With IEC 61850, IEC 61499, and Intelligent Control (Neil Higgins, Member, IEEE, Valeriy Vyatkin, Senior Member, IEEE, Nirmal-Kumar C. Nair, Senior Member, IEEE, and Karlheinz Schwarz, Member, IEEE; IEEE TRANSACTIONS ON SYSTEMS, MAN, AND CYBERNETICS, 2010)

Multi-agent Smart Grid Automation Architecture based on IEC 61850/61499 Intelligent Logical Nodes (G. Zhabelova, V. Vyatkin, Senior Member IEEE; IEEE Transactions on Industrial Electronics, 2011)

More to come.

BDEW Whitepaper on Security for the Power Industry has been updated

Whitepaper V 1.1
Anforderungen an sichere Steuerungs- und Telekommunikationssysteme

White Paper V 1.1
Requirements for Secure Control and Telecommunication Systems

This updated white paper specifies essential security measures for control and telecommunication systems for the power industry. The purpose of this document is to sufficiently protect the operation of these systems against security threats. The security measures described in this document are recommended for all newly procured control and telecommunication systems. The strategic goal of this white paper is to favourably influence the future development for aforementioned systems with regard to IT security. Furthermore the document should establish a mutual understanding for the protection issues of these systems throughout the industry.

Click HERE for a copy of the whitepaper.

Click HERE for related documents.

Video About the German Energiewende

A 11 minute film about Germany’s Renewable Energy Revolution, the so called Energiewende (energy transition) has been published recently.
Voices from science, industry, and politics outline the achievements made so far, next steps, and the opportunities the energy transition offers.

Click HERE to watch the video.

Even the video does not mention IEC 61850 – it is clear that the standard series plays a major role in the future energy delivery in Germany, in Europe and all over!

After the announcement of the White House to spent many Billions of US$ on clean energy, I would not wonder if the German and other governments follow and spent also a lot of Euros and other currencies in the near future.

Hope we have enough well educated engineers to work with the money. If you need good education in the automation of power delivery systems: Here you can get some.

New IEC 61850 Edition 2 Demo Package Available to run on Windows

After successful usage of our old demo package provided 2010 and 2011 NettedAutomation provides a new package for Edition 2 of the IEC 61850 core parts.

The new package comes with a DLL comprising the IEC 61850 Stack, an simple API, and a powerful SCL configuration tool – all included in the DLL. The package contains executable programs that can be used right away. Additionally you will find also the course code of the applications for you to modify the applications to your own needs.

There are two different applications for the client and server:

1. C++ programmed very basic console applications:

The values can manually be changed … use the listed commands.

2. .Net/C# programmed enhanced applications (SCADA like):

The client starts the CER system by clicking the box on the upper left corner of the Client application. The Server application will run. Add values in ther server application … to be reported to the client. The use-case is quite realistic.

All client and server applications use the same DLL (provided by SystemCorp). The IEC 61850 models and communication services are configured by corresponding SCL Files. The applications provided are intended to show what IEC 61850 offers and how to use the simple API for a short time-to-marked development. The applications show how to exchange information with your applications:

 

The client and server can run on one machine (local host) or on two machines. In case of two machines you can trace the communication with, e.g., Wireshark. The addresses (MAC and IP) have to be configured differently for the two cases. The client connects automatically with the server (based on the SCL files) – no need for manual intervention. The demo shows how an embedded client can communicate with a server – without and browsing service.

The client and server can be configured to publish GOOSE and SV.

Some basic documentation comes with the package that can be downloaded. The main objective is the use of the package in our comprehensive hands-on training courses.

Click HERE to get access to the package.

Enjoy!

XMPP - IEC 61850-8-2 Defines Additional Communication Mapping

IEC TC 57 has published a first draft for an additional mapping of IEC 61850 information models and communication messages.

IEC 61850-8-2 (57/1583/CD):
Communication networks and systems for power utility automation - Part 8-2: Specific Communication Service Mapping (SCSM) – Mapping to Extensible Messaging Presence Protocol (XMPP)

Closing date for comments is 2015-09-11

The new mapping defines (relies on) the following definitions:

Service mapping (unchanged)
The abstract (client-server) services of IEC 61850-7-2 are mapped to MMS as defined in the existing IEC 61850-8-1 Ed2.

Message Encoding (new concrete encoding)
The encoding of the messages uses ASN.1 XER (XML encoding rule) – in addition to ASN.1 BER according to IEC 61850-8-1 Ed2. The encoding defines an XML schema – contained in the draft.

Model mapping (unchanged)
As in IEC 61850-8-1 Ed2. This applies to the flattening of the object identification and adding Functional Constraint (FC=ST or MX) in the path name and using “$” for “.”:

Bay5_MMXU1$MX$Hz$mag$i

Underlying Transport (new T-Profile)
The transport (exchange) of the XER encoded messages uses a new approach: using XMPP.

This new transport mechanism and encoding will be used between all kinds of utility Distributed Energy Resource devices and related power management systems, over any communication infrastructure including public networks.

The coming IEC 61850-8-2 can be understood as an (encoding and transport) extension of the existing IEC 61850-8-1.

It is very crucial that most parts of implementations and tools can be re-used! Re-Use is one of the basic approaches used in IEC 61850! Don’t start always from scratch – use what is available and add something.

So, to read the frequency of Bay5 is almost the same .. using the reference
“Bay5_MMXU1$MX$Hz$mag$i”
encoded in ASN.1 BER (IEC 61850-8-1) and in ASN.1 XER (IEC 61850-8-2).

See also example of encoding.

A second document explains the needs and background for an additional mapping:

IEC 61850-80-3 TR (57/1584/DTR):
Communication networks and systems for power utility automation -
Part 80-3: Mapping to Web protocols – Requirements and technical choices

It describes the requirements and the technical principles for a new specific communication service mapping (SCSM) based on Web Protocols.
For more information about the candidate technologies which have been analyzed but not selected as well as about the selection process used for choosing the technology, national committees are invited to consult document 57/1585/INF which is circulated in parallel:

Accompanying document to 57/1584/DTR, Proposed IEC TR 61850-80-3

It mainly describes the technical solutions which have been investigated but finally not selected for the SCSM of the IEC 61850 based on Web Protocols.

1. IEC 61400-25-4 Annex A (Web services)
2. DPWS (Devices Profile for Web Services)
3. REST (Representational State Transfer)
4. XML messaging over Websocket
5. ACSI XML Messaging
6. OPC UA

The finally chosen solution  “MMS XER payload over XMPP as transport” was recognized after several years of work as the preferred solution – especially from a fast time-to-market point of view.

What does XMPP provide?

XMPP (RFC 6120) is a middleware messaging and presence protocol supporting decentralized architectures and provides:

• Registering resources in publicly reachable servers
• Resolving resources based on names
• Security (authentication, integrity, confidentiality) for the communication with the XMPP server

This fits well to the information models defined in IEC 61850.