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