PowerPointpresentatie

1
De herschepping van de wereld 2007

• NOW, Accenten in funderend Energieonderzoek
• Nieuw onderwerp voor NOW onderzoek
  Distributie van elektriciteit
• Flexibel elektriciteitsdistributiesysteem
• Betrouwbaarheid en kwaliteit binnen het smart
  grid concept

2
De herschepping van de elektriciteitsvoorziening

• CIRED 2009

3
Uitgangspunten voor beschouwing

• Aandacht voor NL-papers
• Diversiteit (van deel- tot totaalconcepten)
• Over problemen en oplossingen
• Kwalitatief goede papers geselecteerd
• Maar ook minder goede maar met interessant
  onderwerp omdat dit ook voor NL speelt

4
Overzicht session 4Distributed Energy sources
and Efficient Utilisation of Electricity

• 116 papers
• 11 NL of deels NL
• 12 over beveiligingsproblemen
• 32 over specifieke opwekkers
• Wind, PV, uWKK, Biomassa
• 16 over algemene beschouwingen (systemen)
• 10 over economische voordelen
• 16 over inpassing van decentrale opwek
• Overige over ICT, el. Auto,

5
Achieving smart grid (0025)

• What is the smart grid?
• The need for interoperability!
• The power of collaboration

6
Overzicht papers
Visibility
Smart grids
Smart grids?
Elektriciteitsvoorziening
Opslag, FACDS
Algemene problemen, oplossingen
Specifieke problemen, oplossingen
Time
7
POWER FREQUENCY OVERVOLTAGES GENERATED BY SOLAR
PLANTS (0159)

• Overvoltages due to disconnecting of solar
  inverters
• Damaging revenue meter or other electronic devices

8
Unlocking the hidden potential of electricity
distribution grids (NL-0467)

• gt50 of the capacity in the MV-grid is available
  to transport extra energy
• Mobile smart grid
• The flexible load must be controlled

9
TECHNICAL ASSESSMENT OF DISPERSED ELECTRIC
VEHICLES IN MEDIUM VOLTAGE DISTRIBUTION NETWORKS
(0887)

• Impact of electric vehicle on distribution
  network
• Improving grid stability
• Potential of 1840 MW (500.000 vehicles, 4,6 kW)

10
Comparison of MV-grid structures on fault ride
trough behavior of MV-connected DG-Units (NL-0241)

• Voltage dip propagation
• Disconnection of DG
• Protection 0,8 p.u. time 100-200 ms
• CHP-plants (not for DG connected to LV)

11
SAFETY AND RELIABILITY FOR SMART-, MICRO- AND
ISLANDED GRIDS (1061)

• General paper about protection topics
• Short circuit power
• Selective/unselective tripping
• Island detection
• Resynchronization
• Several general conclusions????

12
FAULT CURRENT SOURCE TO ENSURE THE FAULT LEVEL IN
INVERTER-DOMINATED NETWORKS (NL-0369)

• Fault current source
• Ensuring fault level in inverter-dominated
  islanded networks

13
EXPERIENCES GAINED FROM THE MONITORING OF AN LV
NETWORK SUPPLYING MICRO-CHP CLUSTER(0786)

• uCHP (1 kWe)
• LV-network
• 54 units
• 300 m cable (300 mm2)
• 1000 kVA transformer
• No problems

14
MAXIMUM PENETRATION LEVEL OF DISTRIBUTED
GENERATION WITHOUT VIOLATING VOLTAGE LIMITS
(NL-0271)

• Increasing penetration level using reactive power
• Converter overrating
• Active power curtailment

15
LIMITS TO DISPERSED GENERATION ON ITALIAN MV
NETWORKS (0400)

• Voltage level
• Short circuit power
• Fast voltage variations

16
INTELLIGENT NODES IN DISTRIBUTION SYSTEMS -
TRANSITION FROM RADIAL TO MESHED
OPERATION(NL-0325)

• From radial to meshed operation
• Synchronization of two areas
• A synchronization strategy is proposed

17
INTEGRATION OF DG IN MV-GRIDS CHALLENGES
ENCOUNTERED BY THE GRID OPERATOR (NL-0030)

• Facilitate all possible expected power flows in
  the grid
• Planning in a proactive way
• Impact on transmission, sub-transmission and
  connection to MV-grid

18
NEW NETWORK DESIGN STANDARDS FOR THE GRID
CONNECTION OF LARGE CONCENTRATIONS OF DISTRIBUTED
GENERATION (NL-0272)

• Risk Based Asset Management approach
• Connecting large concentrations of DG in a
  cost-effective way
• Higher MV-voltage for DG
• Less redundancy for DG

19
ENERGY STORAGE FOR POWER FLOW MANAGEMENT AND
VOLTAGE CONTROL ON AN 11KV UK DISTRIBUTION
NETWORK (0824)

• Reducing reverse power flow
• Reduce the steady state voltage variation
• 200 kW during 1 hour
• In between two substations (intelligent node?)

20
BENEFITS OF ENERGY STORAGE IN POWER SYSTEMS WITH
HIGH LEVEL OF INTERMITTENT GENERATION(0358)

• Storage will improve voltage profile
• Reduce losses
• Regulators should encourage the investment in
  storage

21
APPLICATION OF BIDIRECTIONAL ENERGY MANAGEMENT
INTERFACES FOR DISTRIBUTION GRID SERVICES (0796)

• Tested in ISET Lab
• Management needs to consider the requirements of
  the DSO as well the large numbers of grid
  customers CDE units
• (CDEcontrollable distributed electrical..)

22
SHORT-TERM ECONOMICS OF VIRTUAL POWER PLANTS
(NL-1059)

• About the delivery of near real-time balancing
  service
• DER bidding strategy
• Fully marginal cost based or fully price history
  based (or mixed strategy)

23
CAN MICROGRIDS PROVIDE A NEW PARADIGM FOR NETWORK
OPERATION? AN EVALUATION OF THEIR TECHNICAL,
COMMERCIAL AND ENVIRONMENTAL BENEFITS (0905)
24
FIELD-TEST UPSCALING OF MULTI-AGENT COORDINATION
IN THE ELECTRICITY GRID (NL-0009)

• Power Matcher design
• Coordinates the demand and supply of a cluster of
  devices
• Field tests with uCHP
• Commercial and technical optimalisation

25
Smart houses for a smart grid (0751)

• About ICT architecture for
• In house- energy management
• Aggregation software architecture for cluster of
  houses
• Service oriented and strong bidirectional
• With black-start