Power Quality and EMCR.B. Timens

University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlandsr.b.timens@utwente.nl

This work was carried out within the framework of IOP-EMVT, funded by Agentschap NL, The Netherlands

1 Introduction

Grid

Law(EN 50160) Harmonized standards

(EMC Directive Article 6)???

Load

Load

Load

Load

Load

Load

User

Point of interface(POI)

Mobile phone,Transistor radio,

Laptop,...,

Integrated mast,Office building,

...

Equipment:

Conducted immunity/susceptibility Conducted emission

Radiated immunity/susceptibility Radiated emission

Ability of an equipment or system to function satisfactorily in its electromagnetic environment without producing intolerable electromagnetic disturbances to anything in that environment

Standards for supply and consumption do not matchStandards do not cover large number of nonlinear equipment

Need for requirements on the voltage quality and current quality inside the power distribution user network (PDUN) reflecting interaction between voltage and current

2 Integrity of waveformsAll equipment have power electronic interfaces

0,00 0,01 0,02

-0,3

-0,2

-0,1

0,0

0,1

0,2

0,3CurrentVoltage

Time (s)

Cu

rre

nt

(A)

-400

-300

-200

-100

0

100

200

300

400

Vo

ltag

e (V

)

11W CF light

PF = 0.6S = 19 VAA = 0.58 App

Synchronization effects

Deviations in the voltage waveform:function of impedance of PDUN and current (and vice versa)

Photovoltaic system disturbed by power drive system (PDS) for ventilation

110

210

310

410

510

610

710

-210

-110

010

110

210

310

Single-Sided Amplitude Spectrum of V[L-PE]

Frequency (Hz)

|V[L

-PE

](f)

|

Harmonics Radio

No standards

110

210

310

410

510

610

710

-210

-110

010

110

210

310

Single-Sided Amplitude Spectrum of V[L-PE]

Frequency (Hz)

|V[L

-PE

](f)

|

Harmonics

Radio

No standards

PDSoff

PDSon

50 Hz only

L

N

j0.15 Ω

0.16 Ω

0.24 Ω

j0.1 Ω

3 PDUN impedance

Impedance (

Ohm

)

Frequency (MHz)

230 V / SEC2 400 V / A6 400 V / SEC2 400 V / A7 400 V / X 400 V / H-F-16 400 V / B18-IH4 400 V / Z-E12 400 V / A5-I1 400 V / W

PDUN Thales Hengelo

0.25 uF8 uF

50 uH

1 kΩ

ToPower

SourceTo EUT

To 50 Ω terminationor 50 Ω input ofmeasurementreceiver

Signal outputport

5 Ω

Line impedance stabilisation network

Capacitive

Indu

ctive

Resistive

Frequency (f)

Imp

ed

an

ce (Ω

)

Lumped element circuit Behavior model

Curr

ent

Time

Curr

ent

Frequency

Lumped element circuit Behavior model

Curr

ent

Time

Curr

ent

Frequency

4 Equipment behavior

0,00 0,01 0,02-400

-300

-200

-100

0

100

200

300

400

Curre

nt(A

)

Voltage

Measured

current

Simulated

current

Time (s)

Volta

ge

(V

)

-0,4

-0,3

-0,2

-0,1

0,0

0,1

0,2

0,3

0,4

CDCVAC

+

-

IAC

ZIn

D1

D3

D2

D4

ZLoad

CFL

0,00 0,01 0,02-400

-300

-200

-100

0

100

200

300

400

Curre

nt(A

)

Voltage Measured

current

Simulated

current

Time

(s)

Volta

ge

(V)

-4

-3

-2

-1

0

1

2

3

4

C1

D1

D3

D2

D4

ZLoadCDC

D5

VDC

+

-

VPulse

+

-

IVertical

IHorizontal

Maxhold

+

-Low pass

filter

Prototypecurrent waveform C

urr

ent

Time

VREF

VDC

VPulse

VError

A1

A2

A3

VPFC

1-G

0≤G≤1

VAC

+

-

IAC

CLine

Curr

ent

Time-

PC supplyParameterizationRG

UDUT

+

-

LG

UG

IDUT

DUT

Gray box models:commonly found

components+

measurements @ PDUN interface

5 Conclusion