case study harmonic distortion in a steel plant with induction furnaces 2/6_case study harmonic...
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Case studyHarmonic Distortion In a Steel Plant with
Induction Furnaces
Suriya TheppalukEngineer Level 4
Power Quality Analysis SectionProvincial Electricity Authority (South Area 1) Phetchaburi
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Provincial Electricity Authority (South Area 1) Phetchaburi
Introduction Induction Furnace Instrument and Evaluate Conclusion
Outline
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Provincial Electricity Authority (South Area 1) Phetchaburi
PEA Distribution
Network
Introduction
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Provincial Electricity Authority (South Area 1) Phetchaburi
Introduction
THDv exceed 4% (The Harmonic Regulations for The Commercial and Industrial (PRC-PQG-01/1998) in Thailand)
Power Quality Evaluation in Distribution Network Kao Yoi (KHY) 115/22kV Substation
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Kao Yoi (KHY) 115/22kV Substation
Provincial Electricity Authority (South Area 1) Phetchaburi
Harmonic increase on Off Peak (10 PM-9 AM)
Introduction
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Provincial Electricity Authority (South Area 1) Phetchaburi
AMR (Automatic Meter Reading) Via PEA Web Application
Load Profile
Introduction
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Provincial Electricity Authority (South Area 1) Phetchaburi
Trend of THDv
Load Profile
Introduction
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Provincial Electricity Authority (South Area 1) Phetchaburi
Induction Furnace
22/1.65kV 500 Hz 12 pulse
TR
22/ 0.95kV6300kVA
For the 12 Pulse system the input current will have theoretical harmonic components at the following multiples of fundamental frequency: 11, 13, 23, 25, etc.
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Provincial Electricity Authority (South Area 1) Phetchaburi
Induction Furnace
22/1.65kV 500 Hz 12 pulse
Induction Furnace No.1
TR1 22/ 0.95kV 6300kVA
22/1.65kV 500 Hz 12 pulseInduction Furnace No.2
TR2 22/ 0.95kV 6300kVA
22/1.65kV 500 Hz 12 pulse
Induction Furnace No.3
TR3 22/ 0.95kV 6300kVA
Induction Furnaces in a Steel Plant:
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Provincial Electricity Authority (South Area 1) Phetchaburi
Instrument and Evaluate
TP1
115/22kV50MVA
Kao Yoi (KHY) Substation
TP2
115/22kV50MVA
Dranetz BMI PowerVisa@PCC
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Harmonic Standard In Thailand : PRC - PQG - 01 / 1998 The Harmonic Regulations for The Commercial and Industrial
Provincial Electricity Authority (South Area 1) Phetchaburi
Instrument and Evaluate
Voltage at PCC.(kV)
Total harmonic distortion (%)
Total harmonic distortion in each Order (THDV%)
Odd order Even order0.4 5 4 2
22 and 24 4 3 1.7533 3 2 169 2.45 1.63 0.82
115 and above 1.5 1 0.5
Voltage at PCC.(kV)
Current distortion limits in each order (Arms)
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
0.4 48 34 22 56 11 40 9 8 7 19 6 16 5 5 5 6 4 6
11 and 12 13 8 6 10 4 8 3 3 3 7 2 6 2 2 2 2 1 1
22, 24 and 33 11 7 5 9 4 6 3 2 2 6 2 5 2 1 1 2 1 1
698.8
5.9
4.3
7.3
3.3
4.9
2.3
1.6
1.6
4.9
1.6
4.3
1.6
1 11.6
1 1
115 and above 5 4 3 4 2 3 1 1 1 3 1 3 1 1 1 1 1 1
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Provincial Electricity Authority (South Area 1) Phetchaburi
Instrument and Evaluate
4 43.96 3.84
0
1
2
3
4
5
A CTota
l Har
mon
ic D
isto
rtio
n (%
)
THDV
PEA Limit
PCC
Results:
%THDv less than 4%
THDi order 11th , 13th , 14th , 15th , 16th , 17th, 18th
are exceed PEA limit
11
7
5
9
4
6
3
2 2
6
2
5
2
1 1
2
1 10.51
1.82
0.48
1.79
0.45
1.94
0.33 0.42 0.33
9.6
0.2
7.7
3.1
4.4
3.44.0
3.0
1.1
0
2
4
6
8
10
12
H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 H17 H18 H19
Curr
ent D
isto
rtio
n Li
mit
(Arm
s)
Harmonic Oder
PEA Limit
PCC
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Provincial Electricity Authority (South Area 1) Phetchaburi
Solution
- Install Tuned Filter or - Detune Filter or- Active Filter
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Provincial Electricity Authority (South Area 1) Phetchaburi
Solution
Install New 115/22kV SubstationInclude detuned filter@22kV Bus
Customer Plane:
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Provincial Electricity Authority (South Area 1) Phetchaburi
Conclusion
- For decrease of harmonic distortion in a steel plant with induction furnace the customer should install harmonic filter for decrease of harmonic order 11th , 13th , 14th , 15th , 16th , 17th, 18th that are exceed PEA limit
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Provincial Electricity Authority (South Area 1) Phetchaburi