Transcript TCM 03-09

HARMONIC MITIGATION
Installation of Mirus harmonic filters
in TPS fields
Prepared by Ahmed BOUJELBEN
Electrical & Instrumentation Engineer
Thyna Petroleum Services
7, Avenue Abderahmen EL GHAFIKI
BP. 069 - 3069 Sfax Hached
SFAX TUNISIA
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PIPELINE AND FLOWLINE
INTEGRITY
Objectives:
 Reduce voltage and current harmonic distortion
 Reduce Energy losses
 Protect electrical equipment against the harmful effects of harmonics
 Avoid failure of equipment ( VFDs, motors, etc.) and especially on
offshore fields (Generator, battery charge, …).
 Reduce maintenance cost
 Realize energy savings
2
.
As a first step:
 TPS selected 4 sites
 Mirus was selected as suitable filter technology for all TPS
locations
 TPS has purchased and installed 4 Lineator filters (2 filters
onshore + 2 filters offshore)
 Acceptable performances was achieved despite of using filter at
light load, Performance will be presented
As second step:
Mirus solution will be generalized for all TPS fields.
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Waveforms
Before filter installation
After filter installation
4
Performance measurement
(Load rate at 62%)
Before
Harmonic Mitigation
After
Harmonic Mitigation
Reductions
I rms (A)
442,3 (A)
351,2 (A)
- 20,5 %
Uthd
6,3 %
1,2 %
- 81 %
Ithd
72,2 %
10,3 %
- 87%
DPF
0,98
1,00
TPF
0,79
1,00
+ 21 %
KVA
317,4
252,2
- 20 %
KVAR
196,0
24,4
- 88 %
Transformer losses
11,4 kw
5,7 kw
- 50 %
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BEFORE Harmonic Mitigation:
Waveforms and harmonics Spectrums
Tension
Courant
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AFTER Harmonic Mitigation:
Formes des ondes et spectres harmoniques
Tension
Courant
7
BEFORE MITIGATION
Summary Compliance with IEEE std 519 - 1992
Measurement
Voltage total Harmonic Distorsion (uthd)
IEEE 519
LIMITS
6,3 %
5%
Fail
Maximum individual voltage harmonic
4,4 % (5)
3%
Fail
Current total Demand Distorsion (Itdd)
72,2 %
12,0 %
Fail
Max individual current harmonic < 11
61,2 % (5 )
10 %
Fail
11 to 16 7,5 % (13)
4,5 %
Fail
17 to 22
3,4 % (17)
4,0 %
Fail
23 to 34 2,0 % (23 )
1,5 %
Fail
0,7 %
Fail
> 35
1,0 % (35)
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AFTER MITIGATION
Summary Compliance with IEEE std 519 - 1992
Measurement
IEEE 519
LIMITS
1,2 %
5%
Pass
Maximum individual voltage harmonic
0,8 % (5)
3%
Pass
Current total Demand Distorsion (Itdd)
10,3
12%
Pass
Max individual current harmonic < 11
8,4 (7)
10 %
Pass
11 to 16
2,4(11)
4,5 %
Pass
17 to 22
1,5(17)
4%
Pass
23 to 34
0,7(23)
1,5 %
Pass
> 35
0,3 (35)
0,7%
Pass
Voltage total Harmonic Distorsion (uthd)
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