Current waveforms of household appliances disturbing static...
Transcript of Current waveforms of household appliances disturbing static...
Current waveforms of household appliances
disturbing static electricity meters
Helko van den Brom
Ronald van LeeuwenDennis Hoogenboom
Zander MaraisGert Rietveld
VSL – Dutch Metrology Institute
5 September 2019, EMC Europe, Barcelona (ES)
• 2016-2018: LED and CFL lamps and
heater with dimmers
• 2018-2019: laptop, PC + monitor,
smart-TV, refrigerator + freezer,
microwave, USB chargers, DVD players,
induction cookers, blenders, vacuum
cleaners, drilling machines, patio
heaters, coffee machines, water pump
• Future: on-site measurements
(PV inverters, washing machines,
air conditioners, ...)
– Residential houses
– SMEs
Household equipment: current waveforms
2
Phase firing
Phase shifting
Dimming LEDs and pond pump: huge errors
3
Dimming patio heater: no error
4
Dimming blender: no error
5
0 0.005 0.01 0.015 0.02 0.025-400
-200
0
200
400
Time [s]
Voltage [
V]
0 0.005 0.01 0.015 0.02 0.025-3
-2
-1
0
1
Curr
ent
[A]
0 0.005 0.01 0.015 0.02 0.025-400
-200
0
200
400
Time [s]
Voltage [
V]
0 0.005 0.01 0.015 0.02 0.025-2
-1
0
1
2
Curr
ent
[A]
USB chargers: small errors
6
0 0.005 0.01 0.015 0.02 0.025-400
-300
-200
-100
0
100
200
300
400
Time [s]
Voltage [
V]
0 0.005 0.01 0.015 0.02 0.025-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
Curr
ent
[A]
0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02-400
-200
0
200
400
Time [s]
Voltage [
V]
0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02-0.4
-0.2
0
0.2
0.4
Curr
ent
[A]
• 2016-2018: LED and CFL lamps and
heater with dimmers
• 2018-2019: laptop, PC + monitor,
smart-TV, refrigerator + freezer,
microwave, USB chargers, DVD players,
induction cookers, blenders, vacuum
cleaners, drilling machines, patio
heaters, coffee machines, water pump
• Future: on-site measurements
(PV inverters, washing machines,
air conditioners, ...)
– Residential houses
– SMEs
Household equipment: current waveforms
7
Possible Future Test Beds for Meter Approval
8
New phantom power rig: direct generation of arbitrary current waveforms
IEC 61000-4-19 mixed signal approach, distortion added separately
HiHi
Lo Lo
Lo
Hi
Lo
Hi
I
V
AWG
PC
L N L
Meter under test
Optical pulse
detector
• Work is progressing well:
– Household appliance waveforms captured
– Static meters tested with dimmed LED and CFL lamps and water pump
– Other recorded waveforms generated using testbed for meter testing
– Distortions categorized in terms of (dI/dt)max and Imax
– High meter errors observed for high (dI/dt)max and Imax
• Future work:
– More appliances
– On-site measurements
– Systematic use of testbed
– Propose reference signals
– SDOs, utilities, manufacturers
Summary and outlook
9