Cired Guided Tour

1. Frans Provoost | Qirion
Tongyou Gu | Liander
Session 2: Power Quality and Electromagnetic Compatibility

2. Session 2: Power Quality and
Electormagnetic Compatibility

3. Block 1: Electric and Magnetic Fields, Immunity, Safety and
Interference
Block 2: Power Quality Issues of New Technologies
Block 3: Power Quality Simulation, System Studies,
Measurement and Mitigation
Block 4: Quality of Supply, Monitoring and Big Data Analysis,
Standards and Regulatory Issues
140 papers

4. 4 papers vanuit Nederland
Paper 23
Paper 1229
Paper 1231
Paper 2306

5. Block 1: Electric and Magnetic Fields, Grounding, Transients and
Immunity of Systems
• 4 deelonderwerpen
1. Electric and Magnetic Fields
2. Switching Transients
3. Immunity of Devices and Systems
4. Harmonic Performance of Measurement and Power Transformer

6. Block 1: Electric and Magnetic Fields, Grounding, Transients and
Immunity of Systems
• Electric and Magnetic Fields
Metingen, simulaties en mitigatie. Actieve en passieve afscherming.
EM velden van zon op daken (156)
Ondergrondse kabels (611, 2040)
Passieve en actieve afscherming (1096, 1320)
Compliance testen (1671)
Versimpelde formules voor 3D model (2119)
EMF door PLC van slimme meters relatief laag (1104)
• Earthing Systems.
• Switching Transients
• Immunity of Devices and Systems
• Harmonic Performance of Measurement and Power Transformer

7. Block 1: Electric and Magnetic Fields, Grounding, Transients and
Immunity of Systems
• Electric and Magnetic Fields
• Earthing Systems.
Joint workgroup B3.35/CIRED (1750) van worst case (samenvallen aardfout met persoon in de buurt van gevaarlijke
spanning) naar QRA (Quantity of risk analysis)
Nieuwe werkgroep B3.54. Onderzoek verschillende manieren voor testen aardingssystemen wereldwijd. Input voor
Australië gegeven in (1415)
“sterkte” aarding (1383) neemt af door plastic waterleiding (en bij ons ook kunststof kabels)
PV-installatie (0367) groot oppervlak verschillende grondcondities.
Cross bonding (2019)
Live metingen (0550) aardfoutstroom en “ground potential rise” (GPR) in 11 kV netwerk. Hebben wij bij Alliander
ook al eens gedaan (Cired 2005 en 2007)
Locatie overspanningsafleiders bij transformatoren (628) vooral t.b.v. blikseminslag
Global earthing system (822)
Zwerfstromen (1700). Invloed op corrosie aardingssystemen. Vooral tgv DC tractie.
TT systeem (1213) permanent gemonitord
• Switching Transients
• Immunity of Devices and Systems
• Harmonic Performance of Measurement and Power Transformer

8. Block 1: Electric and Magnetic Fields, Grounding, Transients and
Immunity of Systems
• Electric and Magnetic Fields
• Earthing Systems.
• Switching Transients
Capacitieve stromen en vacuüm schakelaars (699)
Invloed op andere netdelen (2095). Gevolgen schakelen 400 kV op 12 km verder gelegen 63 kV station)
• Immunity of Devices and Systems
• Harmonic Performance of Measurement and Power Transformer

9. Block 1: Electric and Magnetic Fields, Grounding, Transients and
Immunity of Systems
• Electric and Magnetic Fields
• Earthing Systems.
• Switching Transients
• Immunity of Devices and Systems
Immuniteit huishoudelijke apparaten (763)
Gevoeligheid LED (straatverlichting ,765 overig 0035).
EMC gevoeligheid automatisering in MSR (1231, poster)
PLC communicatie (1624)
Niet geaarde LS netten (0519, Korea)
• Harmonic Performance of Measurement and Power Transformer

10. Block 1: Electric and Magnetic Fields, Grounding, Transients and
Immunity of Systems
• Electric and Magnetic Fields
• Earthing Systems.
• Switching Transients
• Immunity of Devices and Systems
• Harmonic Performance of Measurement and Power Transformer
Capacitieve spanningstransformatoren(0226)
Inductieve spanningstransformatoren (2230, 1186)
Ferroresonantie (1619). Experimentele studie
Veroudering “droge” transformatoren (0965)
DC zwerfstromen ultra hoogspanningstransformatoren (843) vereenvoudigd model

11. Block 1: Electric and Magnetic Fields, Grounding, Transients and
Immunity of Systems
• Potential Scope of Discussion
Further research about active and passive shielding could end up in general
planning guidelines, allowing decisions whether passive or active mitigation
methods are more efficient and economically competitive.

12. Block 3: Power Quality Simulations, System Studies, Measurement
and Mitigation
• Studies gebaseerd op simulaties en metingen
• Niet alleen LV en MV maar ook (E)HV
• Netwerk impedantie belangrijk onderwerp. RIF sessie
• Steeds meer sophisticated data analysis
• 6 deelonderwerpen
1. Measurement-Based System Studies
2. Resonances and Network Harmonic Impedance
3. Harmonic Source Location and Propagation
4. Voltage Dips and Interruptions
5. Mitigation of Power Quality Disturbances
6. Instrumentation and Data Analysis Techniques

13. Block 3: Power Quality Simulations, System Studies, Measurement
and Mitigation
• Measurement-Based System Studies
9 papers, voornamelijk harmonische aspecten
“harmonic cancelation” en resonantie 0582, 0053, 1627, 0074, 1431
Supraharmonics 0055
Invloed homopolaire stromen in HV netten op overige infrastructuur (1229, poster)
Meetcampagne voor bepaling juiste transformatoren bij veel DG (1025). 22/0.4 beter dan 22/0.42
Beïnvloeding slimme meters (1078)
• Resonances and Network Harmonic Impedance
• Harmonic Source Location and Propagation
• Voltage Dips and Interruptions
• Mitigation of Power Quality Disturbances
• Instrumentation and Data Analysis Techniques

14. Block 3: Power Quality Simulations, System Studies, Measurement
and Mitigation
• Measurement-Based System Studies
• Resonances and Network Harmonic Impedance
Voornamelijk invloed windturbines en condensatorbanken
Vereenvoudigd model VSC windturbine (0830). Invloed verschillende netconfiguraties
Effect van verdeeld opgestelde filters (2052). Vervangen van traditionele condensatorbanken in MV net
Optimale plaatsing in bovengrondse MV netten (1191). Voorkomen resonanties
Invloed van aangeslotenen op impedanties (1795). Input voor CIRED/CIGRE WG C4.42
Invloed modelleren onderliggend MV net op impedantie in HV netten (2306 NL, poster en RIF)
Resonantie boven 2 kHz in LV netten (0984). Simulaties komen overeen met metingen.
• Harmonic Source Location and Propagation
• Voltage Dips and Interruptions
• Mitigation of Power Quality Disturbances
• Instrumentation and Data Analysis Techniques

15. Block 3: Power Quality Simulations, System Studies, Measurement
and Mitigation
• Measurement-Based System Studies
• Resonances and Network Harmonic Impedance
• Harmonic Source Location and Propagation
Hoe werken harmonischen door naar hogere spanningsniveaus (0416)
Hoe vind je de bron van harmonischen
Op basis van metingen met PQ meters(0426). Spanning en stroom
Analyseren admittantiematrix (0475) t.b.v. plaatsing actieve filters
Component analyseren bij netbeheerder en meten bij klanten (1062)
Vergelijken 3 verschillende methodes (1512)
• Voltage Dips and Interruptions
• Mitigation of Power Quality Disturbances
• Instrumentation and Data Analysis Techniques

16. Block 3: Power Quality Simulations, System Studies, Measurement
and Mitigation
• Measurement-Based System Studies
• Resonances and Network Harmonic Impedance
• Harmonic Source Location and Propagation
• Voltage Dips and Interruptions
Interessant voor richtlijnen NL, zie volgende dia
Detectie (0483). Hoe onderdruk je de ruis
Classificatie (0985) ontwikkeling 2 machine learning tools
Verbetering indices (0485) zowel netwerk als klant
Dip performance gevoelige klanten (0937). Monte Carlo Analyse op basis van echt netwerk
Matlab tool (1930) voor simulaties en studies
• Mitigation of Power Quality Disturbances
• Instrumentation and Data Analysis Techniques

17. Spanningsdips
Nieuwe limieten in de netcode
Restspanning
Duur
Hoogspanning Middenspanning
Voortschrijdend jaargemiddelde over 5 jaar

18. Block 3: Power Quality Simulations, System Studies, Measurement
and Mitigation
• Measurement-Based System Studies
• Resonances and Network Harmonic Impedance
• Harmonic Source Location and Propagation
• Voltage Dips and Interruptions
• Mitigation of Power Quality Disturbances
(0213) Combinatie Series Voltage Compensator met 2 verschillende filtercircuits en elektronische schakelaars
C-type filter (0086). Combinatie condensatorbank (verbetering spanning) en filter. Doen wij al Jaren
Meting 3e en 5e harmonische (1228). Nieuw ontwerp 3e harmonische filter. Veld test laat zien dat het werkt
Compensatie inverse stromen en harmonischen (0155). Vermindering onbalans voeding hoge snelheidstreinen.
Vermindering onbalans in LV netten (1641). Vooral voor zwakke netten.
(0123) Vermindering invloed dips en swells op adjustable speed drives
Power system oscilations (0134) thyristor gestuurde weerstanden in schakelaars
Model voor DC link in treinen (1799) gebaseerd op “space state” en Fourier
• Instrumentation and Data Analysis Techniques

19. Block 3: Power Quality Simulations, System Studies, Measurement
and Mitigation
• Measurement-Based System Studies
• Resonances and Network Harmonic Impedance
• Harmonic Source Location and Propagation
• Voltage Dips and Interruptions
• Mitigation of Power Quality Disturbances
• Instrumentation and Data Analysis Techniques
Supraharmonics (0647) test platform 2-150 kHz voor kalibratie PQ meters
Eigen meting kleinverbruikers (0677) open source power quality monitor
Nauwkeurigheid (1239) invloed van integratoren in Rogovski spoelen (clipping)
Dovende sluitingen (1535) ontwikkeling methodiek op basis van veel PQ metingen
Distribution line conditie (0119) multi-label extreme learning machine
Drie verschillende machine learning machines (2049) voorspellen spannings- en stroom karakteristieken

20. Block 3: Power Quality Simulations, System Studies, Measurement
and Mitigation
• Potential Scope of Discussion
One of the major challenges for many different applications is the accurate determination of the network harmonic impedance. It
is e.g. required for realistic simulation of harmonic levels in the power system and the determination of the contribution of a
customer installation to the harmonic voltages. Both applications received also increasing attention in the last years, where the
second one is closely related to harmonic source identification, which is also an important subject of this year’s conference.
Due to the increased number of Power Quality monitors, the amount of measurement data is growing vastly and new methods for
turning the existing data into useful information are required. The application of artificial intelligence and machine learning, in
order to extract this information, seems very promising and is expected to increase in importance in the future.
Mitigation seems to be still an important issue in many countries and is addressed similarly in the research by network operators
and universities. Especially the location and optimisation of harmonic filters as well as their combination with additional features
is discussed this year.
Finally the impact of distorted signals on the accuracy of smart meters receives attention, as the number of meter manufacturers
is large and the quality between them can differ significantly. It has to be ensured that phenomena like distortion in the frequency
range 2-150 kHz or the gradient of the current waveform have no adverse impact on the correct function of these meters in the
future. There is an indication that existing test conditions could be improved to reflect the real conditions in the networks more
realistically.

21. Overzicht van spanningskwaliteit
- paper 23 (Poster)
Landelijk Enexis

22. Harmonische impedantie, assesment of emmision limit
- paper 1393, 2306 (Poster, RIF), 1398, 1407

23. Supraharmonics (2-150 kHz)
- paper 55, 105, 551, 647, 763, 984, 1574

24. Impact van PV aan PQ
- paper 370, 404, 562, 841, 1356, 1802, 1888

25. EV, fast charging
- paper 92, 667, 916, 958, 1032, 1074, 1170, 1409, 1554, 2234

26. Big Data, data analyse over PQ
[0744] Advanced Utilization of Big Data for Real-time Monitoring and Data
Analytics
[2049] PQ prediction by way of parallel computing - benchmark and sensitivity
analysis for classical ML approaches
[2097] Artificial neural network based UPQC controller for power quality
improvement in Micro-grids

27. BLOCK 2: “Power Quality Issues of New Technologies”
• Potential Scope of Discussion
Upcoming integration of EVs leads to increased Power Quality related problems in the grid with relation to hosting
capacity, unbalance, flicker and both LF and HF emissions in the grid. Consequently, the distribution networks starts
suffering through the use of EVs much more than nowadays through PV inverters. It is recommended to analyse
and monitor charging stations including the integration of distributed charging points for EVs in order to obtain
sufficient information for a reliable assessment of their impact on both hosting capacity and Power Quality related
issues.
In contrast to former CIRED conferences, the interest for the impact of wind turbines on new technological
evolutions is rather low. However, wind power plants still may have a significant impact on power system operation
such as voltage variations and flicker effects. Also here, intensified monitoring and publication of results is
recommended.
LED technology is massively increasing in modern electricity distribution networks. Due to their low DC power,
power electronic converters are needed to control these types of lamps, creating various harmonics profiles and
causing negative impacts on electrical equipment in electricity distribution networks. Therefore, future evaluations
of the massive integration of this type of loads and their interaction on both linear and nonlinear loads and sources
must be considered.

28. Block 4: “Quality of Supply, Monitoring and Big Data Analysis,
Standards and Regulatory Issues”
• Potential Scope of Discussion
The development in the grid is much faster, as in the past. New components like inverter based generation and electronic
household equipment become relevant for Power Quality and entail new phenomena and compatibility issues. Regulation and
standardisation have to keep up with this process in order to set an adequate framework for the co-ordination of all players and
components in the electric grid.
The allocation of an adequate share of the compatibility level for voltage distortion to the customers and the determination of fair
and justifiable limits for emissions already in the planning stage is one of the challenges to be addressed in the field of Power
Quality. As power electronics are on the rise in generation and storage, these installations have to be involved in the allocation
process. Further research topics are multi-harmonic source location and new indices as a basis for harmonic control schemes.
In recent years, current and voltage distortions in the range of 2 kHz to 150 kHz (supraharmonics) as well as rapid voltage changes
(RVCs) are Power Quality parameters which have been of high interest regarding research. A standard measurement method for
supraharmonics is still a research topic, which should be addressed. Furthermore, more research is needed to regarding the
network harmonic impedance, in particular in the frequency range above 2 kHz.
Distribution grid operators face the challenge to apply smart monitoring systems in meaningful ways to optimize planning and
operation of the grid. Comprehensive Power Quality monitoring with efficient data analytics will be a key element to enable
optimal operation of the distribution grid while maintaining supply quality. Big data analytics and machine learning will play an
important role in this process. The use of flexibilities in the grid is required by different players with different goals. However, as
the electricity grid is the backbone of modern infrastructure, flexibilities will have to be allocated by regulators in a way to
maintain and support the reliable and cost-efficient operation of the grid.

29. Tot in Madrid !