Transcript D2- 01_25

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FIRST STEPS TOWARDS
SYNERGISING COMMUNICATION
SYSTEM, WAMS
AND SITUATIONAL AWARENESS
SYSTEM
U.G.ZALTE,
EX-DIRECTOR (OPERATIONS) –MSETCL,
A.R. KULKARNI.
DATE: 13-15 NOVEMBER 2013
CIGRE TUTORIAL AND COLLOQUIUM
ON SMARTGRID
MYSORE, KARNATAKA - INDIA .
COVERAGE
INTRODUCTION
MSETCL SYNCHROPHASOR SYSTEM
DETAILS
CASE STUDY : ANALYSIS OF
OCCURRENCE IN THE GRID USING
SYNCHROPHASOR SYSTEM
EXPERIENCE OF INTEGRATING WAMS
AND SITUATIONAL AWARENESSS
SYSTEM
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MSETCL ROLE
Transmission Licensee
State Load Dispatch Centre (SLDC)
State Transmission Utility (STU)
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MSETCL INFRASTRUCTURE AS ON 31st
JULY 2013 .
Transformation Capacity
(MVA)= 100316
EHV Substations= 590
16000
50000
300
14446
43608
45000
273
14000
40000
250
EHV Lines (CKT KM.)= 42112
13031
12000
35000
200
185
10000
30000
25000
150
24418
22280
20000
100
25
2
0
34
37
34
3270
4000
10000
5000 3582
2674 2610
1144
2000
1504
1724
697
0
0
EHV Substation
7440
6000
15000
50
8000
Transformation…
EHV Lines (CKT KM.)
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MSETCL 400kV Network
Overview
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Communication System architecture
in MSETCL
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Total bandwidth Requirement for various applications in
use at 400kV Dhule substation
Bandwidth for RTU data
Communication
Bandwidth for ERP data
Communication
Bandwidth for ABT data
Communication
Bandwidth for VOIP data
Communication
Bandwidth for WAMS data
communication
Total bandwidth requirement
414.46Kbps
824Kbps
5.33 Kbps
87.2Kbps
128.0
1479.53 Kbps (1.47Mbps)
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MSETCL WIDE AREA
MEASUREMENT SYSTEM
(WAMS) INFRASTRUCTURE AND
CASE STUDY
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Architecture of WAMS infrastructure
in MSETCL.
Typical Architecture for Synchrophasor System
A4 color
Printer
Workstation Console
Data
Historian
Server
PDC
Ethernet Switch
Router cum firewall
Ethernet Cat-5 Cable
RG 58 A/U Cable
GPS Clock-1
PMU-1
Power Substation-1
MSETCL
Communication
Interface module
GPS Clock-2
PMU-2
Power Substation-2
PMU-15
Power Substation-15
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PMU Locations in MSETCL System
Sr. No.
Substation Name
Substation Type
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400 kV Chandrapur
Attached to Thermal Generating station & Interstate interface
2
400 kV Koradi
Attached to Thermal Generating station
3
400 kV Bhusawal (Khadka)
Attached to Thermal Generating station
4
400 kV New Koyna
Attached to Hydro station
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400 kV Padghe
Critical Grid substation
6
400 kV Kalwa
Critical Grid substation
7
400 kV Dhule
Grid substation & Interstate interface
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400kV Kolhapur (Talandge)
Grid substation
9
400kV Aurangabad (Waluj)
Critical Grid substation
10
400 kV Lamboti
Grid substation
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400 kV Lonikand
Critical Grid substation
12
400 kV Girawali
Attached to Thermal Generating station & Interstate interface
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220 kV Trombay
Attached to Thermal station
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220 kV Boisar
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220 kV Eklahare GCR
Critical Grid substation
Attached to Thermal Generating station
Within Greater
Mumbai Area
Within Greater
Mumbai Area
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PARAMETERS OBSERVED ON
SYNCHROPHASOR SYSTEM AT SLDCKALWA
 Delta
 Voltages
 Currents
 Frequency
 df/dt
 Active power
 Reactive power
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Occurrence at 400kV Deepnagar
Substation and calculation of H
• On 22.05.2013, at 22 :48 :22 :200 Hrs, it is
observed that, R phase Bus-1 CT of GT-5 bay
failed and burst resulting into operation of
busbar protection of main Bus-I.
• At the same time, B phase pole of main CB of
400 kV Khadka Circuit-2 failed and burst. The
bus bar protection for Main bus-2 also
operated.
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Occurrence at 400kV Deepnagar
Substation and calculation of H
• Both the 400 kV buses became dead resulting
into failure of supply at 400kV Deepnagar
substation. This occurrence has also resulted
into generation loss of 531 MW in the state
grid.
• Rate of change of frequency (df/dt) recorded
by PMU’s is utilised to calculate inertia
constant ‘H’ for Maharashtra system.
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Voltage Dip observed at various locations
of PMU placement in MSETCL system
LOCATIONS
Ph.-G Voltage Drop Observed in R-Ph
From
To
400kV Dhule
236.69 kV
209.87 kV
400kV Koradi
246.92 kV
221.26 kV
400kV Lonikand
234.11 kV
224.25 kV
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Current Rise in R-Phase observed at
400kV Koradi
Rise in R-Phase Current observed at 400kV Koradi from
0.4kA to 1.20 kA
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Frequency and df/dt Variation observed by PMUs
during Occurrence at 400kV Deepnagar Substation
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Calculation of H from df/dt measured
from PMU during occurrence at 400kV
Deepnagar Substation on 22.05.2013
i) ΔP - Generation loss during occurrence = 531 MW
ii) P : Total Generation in Maharashtra on
22.05.2013 = 15,973 MW
iii) F0 : Frequency before the disturbance = 50.02 Hz
iv) df/dt measured from PMU : (-0.119)
H = (531) / (15973) * 50.02 / [ 2* (-0.119)]
H = -6.25 Sec.
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PAPER : D2- 01_25
• What are the procedures followed while integrating Synchrophasor System
with Situational Awareness System?
• What are the challenges faced for the integration?
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Dataflow from PMUs to Situational Awareness system
Data from PMUs
PDC
IEC -104 Converter
Situational
Awareness System
PROCEDURAL CHECKS & CHALLENGES
 Proper Communication System .
 Allocation of IPs and its proper use alongwith Gateway, Proper
LAN formation .
 Ensuring proper Interoperability between WAMS and Situational
Awareness system .
 Ensuring proper data receipt of following :
a) From PMUs to PDC
b) From PDC to IEC-104 Converter
c) From IEC-104 Converter to Situational Awareness system
 Data Validation, Point to Point test for WAMS and Situational
Awareness system data .
 Ensuring proper Visualisation of data in Situational Awareness
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Status of data being sent from PMUs to PDC
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Status of data being sent properly from IEC-104
converter to Situational Awareness system
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IEC-104 converter not communicating with
Situational Awareness system
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IEC-104 Converter communicating
with Situational Awareness system
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CONCLUSIONS
It discussed importance of communication system,
bandwidth utilisation for different application
being used in transmission system including that
of WAMS.
Discusses in brief MSETCL initial experience
with Synchrophasor
system in analysing
occurrence in the grid.
Brief information on initial integration related
aspects between Synchrophasor system and
Situational awareness system .
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THANK YOU !!
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