UTINNOVATION

Condition Monitoring

Knowledge . Empowering . You

IEC 61850 Edition 2

Two Day Training Course

Content
•  IEC 61850 aspects of monitoring

•  SCADA services

•  Alarm handling

•  Naming

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IEC 61850 and Monitoring

•  What is monitoring

•  Modeling monitoring in IEC 61850

•  Sensors

•  Measuring and metering

•  Supervision and protection

•  Condition monitoring

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Monitoring and supervision - examples

•  Supervision of an insulation media – resulting in some
actions taken by the system (e.g. trip breakers)

•  Supervision of a heating – resulting in actions initiated by

an operator (e.g. send maintenance people on place)

•  Collect information about the condition of an equipment –

can be analyzed by a specific tool to produce
recommendations for maintenance

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Monitoring in IEC 61850

Measuring Analysing
(Sensors)
Txxx
VA=220.1k

Processing V
VB=220.2k
V

Mxxx VC=220.1k
V

Electrical
e.g. TCTR
Protection Trip System decides to
Pxxx
Non electrical take actions à
e.g. TPRS standardization of
Supervision Trip
Start semantic required
Sxxx

Al1=TRUE

Cond monitor
Sxxx

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Logical nodes for sensors

•  TCTR and TVTR for electrical quantities

•  Many LNs for non electrical quantities are added in Edition 2

•  Output of sensor logical nodes is typically an analog signal

modeled as sampled values

•  Data EEHealth used to supervise the sensor

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Interaction between LNs on different levels

•  Not shown on this picture: Figure 20 IEC 61850-90-3

–  Supervision logical nodes “S” (e.g. SIMG – Supervision Insulation

Medium Gas).
•  “S” logical nodes are used at the bay level and communicate with
“T” logical nodes

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Measuring and metering

•  Measured quantities are further processed to generate
valuable information like
–  Currents, voltage, power and impedance in a three phase system
(MMXU)
–  Calculation of energy in a three phase system (MMTR)
–  Calculation of harmonics and interharmonics (MHAI)

•  Statistical evaluation of these values is possible

–  Maximum or minimum value over a defined period
–  Creating a history of this information

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Supervision and protection

•  Measured quantities are evaluated with the purpose to
detect dangerous situations
–  A supervision of the quantities like e.g. an insulation medium in
Sxxx logical nodes
–  A processing of the quantities in Pxxx logical nodes

•  Based on results, the system initiates actions

–  No human involved in decisions
–  Well defined semantic required for interoperability

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Supervision – Example STMP

•  Well defined semantic

•  Settings are standardized

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Supervision – Example SIMG

•  Supervises pressure, density and temperature

•  Well defined semantic
•  Related settings are currently not part of the standard

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Status information of LN SIML

SIML

InsAlm (stVal=T) InsAlm (stVal=F)

Insulation
Liquid Level InsBlk (stVal=T)
(SIML.Lev) liquid refilled
[Analogue
Value] InsTr (stVal=T)

(private) hysteresis
configuration
(private)

Time

SIML.InsAlm

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Condition monitoring
•  Monitor the condition of equipment
–  Power transformers
–  Switchgear
–  Sensors
–  Auxiliary system (e.g. heating, cooling)
–  Power lines

•  Purpose
–  Failure detection
–  Guidance for maintenance personal
–  Condition based maintenance
–  Life time extension

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Health of the system

•  Standardized data object
Health (or EEHealth) is
used by operator

•  More detailed information

may be available for the
•  Green: everything ok specialist to determine the
source of the problem
•  Yellow: abnormality – still
safe to use equipment

•  Red: failure – unsafe to

use equipment
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Condition monitoring in IEC 61850

•  IEC 61850-90-3: Using IEC 61850 for Condition
Monitoring Diagnosis and Analysis

•  Topics covered include:

–  Use of existing Logical Nodes for condition monitoring
–  Extensions to existing logical nodes
–  New logical nodes
–  Communication requirements

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SCADA services
•  Overview on SCADA services

•  Event oriented transmission

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Overview
•  Client / server communication in IEC 61850 includes
typical SCADA services
–  Control
–  Data acquisition (read)
–  Event oriented transmission
–  File transfer

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Status information (Single Point Status)

SPS class
Attribute Attribute Type FC TrgOp Value/Value Range M/O/C
Name
DataName Inherited from Data Class (see IEC 61850-7-2)
event
DataAttribute (data change,
status quality change)
stVal stVal BOOLEAN ST dchg TRUE | FALSE M
q Quality ST qchg M
t TimeStamp ST M
substitution
subEna BOOLEAN SV PICS_SUBST
subVal BOOLEAN SV TRUE | FALSE PICS_SUBST
subQ Quality SV PICS_SUBST
subID VISIBLE STRING64 SV PICS_SUBST
configuration, description and extension
d VISIBLE STRING255 DC Text O
dU UNICODE STRING255 DC O
cdcNs VISIBLE STRING255 EX AC_DLNDA_M
cdcName VISIBLE STRING255 EX AC_DLNDA_M
dataNs VISIBLE STRING255 EX AC_DLN_M
Services
As defined in Table 13
Description

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Status monitoring function

Reports from server to client

(or store entries into IED log)
stVal
(Status
Value)
value (tn) value (tn+1) value (tn+2) value (tn+3)

TRUE

FALSE
tn tn+1 tn+2 tn+3 Time

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Analog information

Trigger Option

range,
mag

deadband

range

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Range monitoring function

Reports from server to client

(or store entries into IED log)
Analogue
h, t hh, t max,t
Value

RangeConfig:

max = 120
instMag

hhLim = 70

hLim = 55
Good
Maintenance required Maintenance Failure
demanded
min lLim llLim = 0
Time

Range: normal high high-high max

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Dead-band monitoring function

Reports from server to client (or log entries)

Analogue
value (tn) value (tn+1) value (tn+2) value (tn+3)
Value

mag

instMag

db (deadband
configuration):

+/-10 %
of (Min-Max) value

tn tn+1 tn+2 tn+3 Time

start

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Alarm handling
•  Aspects of alarm handling

•  Alarm handling in IEC 61850

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Alarm handling
•  TC WG10 Taskforce established in 2012 to address
alarm handling
–  Use cases currently identified:
Alarm System

Dynamically
View Alarms Configure System

Asset Management Field test engineer

«extend»

Detect missing alarm

notifications
Create Alarm

Expert System Acknow ledge Alarms

Legacy System

Shelv e/Un-shelv e Create Alarm Group

Alarms

System Designer

Inhibit un-inhibit
System Operator
Alarms Prioritise Alarms

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Principles
•  Any event can create an alarm

•  Alarm handling consists of

–  Creating group alarms
–  Creating alarm lists
–  Acknowledgment of alarms

•  Multiple practices are in use

–  Does an unacknowledged alarm disappear when the condition is
gone
–  Local acknowledgement versus remote acknowledgement

•  Standardization in IEC 61850 is currently limited

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Alarm handling in IEC 61850

•  Some alarms are standardized in the LNs; e.g.

–  EEHealth
–  PmpAlm – loss of pump in cooling group
•  LN CALH to create group alarms
•  No specifications about alarm handling

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Questions

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