Presentatie Event “Power Quality | Changing landscape”

1. De expert in de kwaliteit
van elektriciteit
Wij leveren producten en diensten ter optimalisering
van de spannings- en stroomkwaliteit (Power Quality)

2. Agenda
1 Snelle Spanningsvariatie
2 Harmonische vervuiling

3. SNELLE
SPANNINGVARIATIE
FLIKKER

4. HyTEPS - Expert in Power Quality
Wat is Flikker
4
1. Spanningsvariatie tussen ± 10 %
2. Meerdere variaties in tijd
3. Frequentie van variatie

5. HyTEPS - Expert in Power Quality
Flikker gaat voornamelijk om gemoedsrust mensen
5
Oog-hersenen respons geeft aanleiding tot de irritatie.
Gevoelig voor:
1. kleur
2. Helderheid
 Relatie tussen spanningsvariatie en gevoel van irritatie
 Experimenten gebaseerd op mensen
 Frequentie wat zichtbaar is: 0.05 Hz – 35 Hz
8.8 Hz is meest storend

6. 20 november 2023 HyTEPS - Expert in Power Quality 6
Use Case – The problem
 Metal products fabrication
 10kV public grid connection
 Continuous spot welding
 Repetitive high current peaks
 High flicker values (up to 3.5 on 10kV)
Risk of disconnection by grid operator !

7. 20 november 2023 HyTEPS - Expert in Power Quality 7
Use Case – The installation
 4x 10/0.4kV transformers
 Arc welding lines
 Up to 4.2kA peaks
TR1 TR2 TR3 TR4
Welders Welders Welders Welders

8. TR1 TR2 TR3 TR4
Welders Welders Welders Welders
20 november 2023 HyTEPS - Expert in Power Quality 8
Use Case – Measurements
 Measured multiple locations
 Fast and accurate device
 Elspec G4500
 1024 samples/sine
 Continuous waveform
: Measurement location
 4x 10/0.4kV transformers
 Arc welding lines
 Up to 4.2kA peaks

9. 20 november 2023 HyTEPS - Expert in Power Quality 9
 Fast ramp up/down
 From 0.35kAp to 6kAp
Use Case – Measurements

10. 20 november 2023 HyTEPS - Expert in Power Quality 10
Use Case – Measurements
 up to 6%
 100-120 min-1
 Pst up to 6.87

11. 20 november 2023 HyTEPS - Expert in Power Quality 11
Use Case – Simulations
 Simulations
 Technical specs installation
 Measurement data
 Characteristics Equalizer

12. 20 november 2023 HyTEPS - Expert in Power Quality 12
Use Case – Solution
 Elspec Equalizer
 Thyristor controller capacitor bank
 Fast reactive power compensation <20ms
 1500kvar in 15 steps (per transformer)
 Implemented in multiple sequences

13. 20 november 2023 HyTEPS - Expert in Power Quality 13
Use Case – Commissioning

14. 20 november 2023 HyTEPS - Expert in Power Quality 14
Use Case – Results
 Equalizer reacts within 20ms
 Q significantly reduced
 is reduced
Equalizer switches ON
Equalizer switches OFF
Q ~ 0
௅ ே ௅ ே
Remains almost unchanged Significantly reduced

15. 20 november 2023 HyTEPS - Expert in Power Quality 15
Use Case – Results
 Pst Q1 = 1.9
 Pst Med = 2.2
 Pst Q3 = 2.5
Before:
 Pst Q1 = 1.4
 Pst Med = 1.6
 Pst Q3 = 1.8
After:

16. 20 november 2023 HyTEPS - Expert in Power Quality 16
Use Case – Results
Simulations:
Measurements:
Simulation corresponds to real results

17. HARMONISCHEN

18. HyTEPS - Expert in Power Quality
Limieten voor de spanning!
18
1%
0,75%

19. HyTEPS - Expert in Power Quality
Harmonische vervuiling 10kV
19
THD(U)%

20. HyTEPS - Expert in Power Quality
Fasenhoeken spanning en stroomharmonische
21
Spanning Stroom

21. HyTEPS - Expert in Power Quality
Resultaten
22

22. Harmonische compensatie per order

23. HyTEPS - Expert in Power Quality
Allocatie van limieten naar een MV-aansluiting
24
HV
MV
LV
G
G
L
L
L
G
LMV
LHV
LLV
௛ ௛ ௛

24. De expert in de kwaliteit
van elektriciteit
Wij leveren producten en diensten ter optimalisering
van de spannings- en stroomkwaliteit (Power Quality)