The Impact of Voltage Sag for PEA North 1 Customers

Report
PQSynergy TM 2011 Chiangmai
The Impact of Voltage Sag for PEA Area 1(North) Customers
in North Industrial Estate
Suwipha Kittitanapisarn. B.Eng(EE)
Assist. Chief of Power Quality Section
PEA Area1 (North) Chiang Mai, THAILAND
[email protected]
Provincial Electricity Authority, Thailand
19 - 21 September 2011, Chiang Mai, Thailand
1
PEA Area1 (North) In Overview
The Service Area of PEA Area1(North) is approx. 69,557 km2 ,
accounting for 13.64 % of the country.
 6 Provinces




80 amphors
592 districts
6,611 villages
4,734,252
populations
 1,534,755
customers
Provincial Electricity Authority, Thailand
2
41 Substations in Responsibility of PEA Area1
(North) (278 Feeders)
PEA Substation 115/22 kV
PEA Substation 22 kV
PEA Switching Substation115 kV
MEA
CSA
MCA
S
FAA
S
MTG
CMD
CMB
CMF CMA
CME
NIU
PAS
BGA
PYA
 PEA Substation 22kV
CHM
LPB
S
Total 14 Substations
Cement Thai Lampang Public
Co.,Ltd.
LP-2
S LP-1
LPA
 PEA Substation 115/22 kV
Total 27 Substations
 PEA Switching Substation 115kV
LNC
LIA
CUN
LPC
HCA
NIA
CTG S
HOA
CMC LNB
LNA
CEA
PAN
DKA
SKP
EGAT Substation
Customer115 kV
MLA
WPA
MTA MRM
S
TNG
S
CDO
PAU
S
Transmission Line 115 kV PEA
THG
CR
CRA
MHA
MCN
CKN
TEA
Total 2 Substations
3
The Comparison of Peak Load
Year 2011 and 2010
MW
1100
916.00
1008.66
991.33
939.09
995.73
948.38
926.97
937.62
935.01
871.20
Higher than
4.55%
800
Higher than=
12.5%
Higher than =
4.86%
Lower than =
4.85%
Lower than =
3.92%
Lower than =
4.38%
876.12
600
1,039.12
957.77
987.46
900
700
1037.81 1031.76 1041.39
Higher than =
7.83%
1000
980.09
980.45
500
Jan
ม.ค.
Feb Mar
ก.พ.
มี.ค.
Apr
เม.ย.
May
พ.ค. June
มิ.ย.
โหลดสูง2010
สุด ปี 53
Year
Jul
ก.ค.
Aug
ส.ค.
โหลดสู
ด ปี 54
Yearงสุ2011
Sep
ก.ย.
Oct
ต.ค. Nov
พ.ย.
Dec
ธ.ค.
Lamphun Province In Brief
8 Amphors 8 Substations
Power Transformer
Capacity 490MVA
Total Load
175.2 MW
UF.
40.87
%
5
Transmission Loop Line Project in
Chiangmai Area
MR
M
Now Open Looped
Peak Load
300 MW
1,630 A
DKA
CMD
CME
CMC
CMF
SKP
LNC,NIA,N
Introduction North Industrial
Estate NIU Substation
North Industrial
Estate Lot2
North Industrial
Estate Lot1
NIA Substation
3 Substations
Power Transformer
Capacity 240 MVA
Total Load
101.7 MW
UF.
48.42
%
8 Amphors 8 Substations
Power Transformer
LNC Substation
Capacity 490MVA
Sahapat
Industrial Estate
Total Load
115kV CMC- LNC
175.2 MW
4.89
3.11
1.47
1.38
2.00
1.57
1.73
3.00
2.83
4.00
Lower than
21.47%
3.84
4.42
5.00
Times
per
customer
per year
4.90
6.00
4.64
5.83
Report of Average SAIFI Indices
(Accumulated from Jan-June 2011)
Compare with Target (Level3) in Year 2011
1.00
0.00
Industrial
Estate
City
Municiple
District
Municiple
SAIFI Year 2011
SAIFI
SubDistrictt Residental
Municiple
Area
Total
Target Year 2011
8
Industrial
Estate
City
Municiple
District
Municiple
Subdistrict
Municiple
SAIDI
SAIDI Year 2011
Residental
Area
Lower
than27.35%
122.65
168.82
201.82
154.27
98.68
59.07
78.29
40.58
45.03
56.41
55.33
Minutes
per customer
per year
240.0
210.0
180.0
150.0
120.0
90.0
60.0
30.0
0.0
169.77
Report of Average SAIDI Indices
(Accumulated from Jan-June 2011)
Compare with Target (Level3) in Year
2011
Total
Target Year 2011
9
Voltage Sag (IEEE Std.1159-1995)
To Industrial Customers, a Voltage Sag and Momentary
Interruption are equivalent if both shut their process down
10
Fault in Transmission and Distribution Line
22 kV
115kV
22 kV/400 V
2500 KVA DYn11
While the Fault is in the
Transmission System, the
Entire
Power
System,
including the Distribution
System will experience
Voltage Sag and Fault are
cleared 3-6 cycles for Fault
Detection and Breaker
Operation
Severity of Voltage Sag
depend on
- Fault Location
- Fault Sizing
- Fault Type
and Clearing Time of
Protection Equipment
Provincial Electricity Authority, Thailand
11
Study of Voltage Sag Analysis
in North Industrial Estate
Process of Voltage Sag Prediction
1.To Correctly Prepare Single Line Diagram of North Industrial
Estate Area from PEA-GIS Phase2 Web Database
2.Performing Short-Circuit Simulations with Sliding Faults
which include Line to Line, Line to Ground and Three Phase
Faults in Digsilent 14.0 Simulation Program.
3.Calcutaion Magnitude of Voltage Sag at Interesting Load
4.Predict Voltage Sag Duration Time by Characteristic
of Clearing Fault of Protection Equipment
5.Compare Characteristic of Voltage Sag for Determine
the Need for Power Conditioning Equipment at Sensitive Loads
in Customer Area
Provincial Electricity Authority, Thailand
12
Theory of Voltage Sag Analysis
V sag = Z 2 + Z f
Impedance Divider
Z1+Z2+Zf
Provincial Electricity Authority, Thailand
13
Transmission Line from
CMC to LNC
Provincial Electricity Authority, Thailand
14
Process to Voltage Sag Analysis
1.Prepare Single Line Diagram from
PEA-GIS Phase 2 Web Database
Provincial Electricity Authority, Thailand
15
GIS Phase 2
Provincial Electricity Authority, Thailand
16
Export Single Line Diagram
from GIS Phase 2
as *dz files
Provincial Electricity Authority, Thailand
17
3.Merge *.dz Files in Digsilent Power Factory
Version 14.0 and start to run Sliding Fault
Calculation
Provincial Electricity Authority, Thailand
18
Voltage Sag from Transmission Fault
*OPTREX is a Customer in North Industrial Estate Lot1
Provincial Electricity Authority, Thailand
19
(Continued) Voltage Sag from Transmission Fault
Provincial Electricity Authority, Thailand
20
Description Voltage Sag from Distribution Fault
Provincial Electricity Authority, Thailand
21
4. The Result For Fault at NIU02 ,5 km. From NIU Substation
3P-Fault=3.63 kA,
distance =5km.
V=0 pu.
0.14 pu.
For Parallel Feeder (NIU01,03,05 = 0.49 pu.)
S
Drissen
0.43 pu.
0.46 pu.
Provincial Electricity Authority, Thailand
22
Voltage Sag Summary from Distribution Fault
Provincial Electricity Authority, Thailand
23
(Continued)Voltage Sag Summary from Distribution Fault
Provincial Electricity Authority, Thailand
24
Voltage Sag Occurrence Calculation Summary
from Transmission and Distribution Fault
Provincial Electricity Authority, Thailand
25
Voltage Sag Occurrence Calculation Summary
from Transmission and Distribution Fault
Provincial Electricity Authority, Thailand
26
How Often for Customers to Meet Voltage Sag?
How Often for Sag 40% at Drissen Co.,Ltd.(NIU02) In 8
Months?
Drissen Co.,Ltd. Meet Sag 40%
= Uniform Fault Rate x Distance from NIU-Drissen
= 0.17 (Faults/km-year) x 1 km.
= 0.17 sags / 8 Months
Provincial Electricity Authority, Thailand
27
Installation Dranetz-BMI PX5-400 POWER Analyzer
1.At Chiangmai 3
Substation(CMC)
2.At OPTREX
Co.,Ltd.(NIA10)
3.At Drissen
Co.,Ltd.(NIU 02)
Provincial Electricity Authority, Thailand
28
Power Quality Measurement at OPTREX Co.,Ltd.
3 times for Transient
25 Jul – 26 Jul 2011
Provincial Electricity Authority, Thailand
29
Power Quality Measurement at Drissen Co.,Ltd.
Abnormal Harmonic 5th order
at Main Capacitor
12 Sep – 15 Sep 2011
Provincial Electricity Authority, Thailand
30
Power Quality Measurement
at Central Pattana Chiangmai
Two events of Voltage Sag
at MDB11
from 10 -16 Jun 2011
Instantaneous(0.01-0.6S)
Provincial Electricity Authority, Thailand
Sag 46%
31
Conclusion
The Impact of Voltage Sag for PEA Area 1(North) Customers in North Industrial
Estate
1. The Result of 1P-Fault in 115 kV Transmission Line (From CMC to LNC
Substation) Effects Voltage Sag not less than 0.8 pu.
2. The Result of 1P-Fault in 22 kV Distribution Line (NIU,NIA,LNCSubstation)
Effects Voltage Sag not less than 0.6 pu.
3. Uniform Fault Rate of LNC Substation (From TR.1) has the Most Value and
Implies that at the Same Distance from Substation if Comparing with Other
Substation in Industrial Park ,LNC Substation (From TR.1) must have the Most
Effect from Voltage Sag
Provincial Electricity Authority, Thailand
32
Suwipha Kittitanapisarn.
PEA Area1 (North) Chiang Mai, THAILAND
[email protected]
Provincial Electricity Authority, Thailand
33

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