Wind farm

1
Wind farm fuel cell hybrid energy system for
reducing power fluctuations in wind farms
J. E. Villena-Lapaz1, A. Vigueras-Rodríguez1, E.
Gómez-Lázaro1, A. Molina-García2, J. A.
Fuentes-Moreno2 1Renewable Energy Research
Institute (IER), University of Castilla-La
Mancha 2Department of Electrical Engineering,
Universidad Politécnica de Cartagena
European Wind Energy Conference, Warsaw 23rd of
April 2010
2
Index

1. Introduction
2. Power fluctuations
3. Wind farm fuel cell hybrid system
4. Results
5. Conclusions

3
Index

• Introduction

4
Motivation

• Current and future rising of the wind energy
• High wind penetration
• Fluctuating nature of the wind
• Power Fluctuations of the wind farms
• Keeping the balance between generated and
  consumed power
• Security issue for systems with weak
  interconnections
• The need to store big amounts of energy
• Hydrogen-based devices can offer sufficient
  flexibility for operation in connection with
  stochastic generators

5
Motivation

• Example of the power fluctuation in a single wind
  turbine and in the whole wind farm

6
Aim of this work

• Smoothing the power fluctuations of a wind farm
  by adding a hydrogen fuel cell to the system

PWF
PWF
Wind data
Wind Farm
PFC?

Fuel Cell
PT

Fluctuations of PT lt Fluctuations of PWF
7
Index

• Introduction
• Power fluctuations

8
Power fluctuations

• Ramping rates

9
Power fluctuations

• Reserve requirements

10
Power fluctuations

• Procedure

11
Power fluctuations

• Procedure

12
Index

• Introduction
• Power fluctuations
• Wind farm fuel cell hybrid system

13
Wind farm fuel cell system description
PWF(n)
Wind data

Wind Farm
PT(n)

PFC(n)
Fuel Cell
PFC(n-1)-?PT(n)
14
Wind farm fuel cell system description
15
Index

• Introduction
• Power fluctuations
• Wind farm fuel cell hybrid system
• Results

16
Results
17
Results
18
Results

• With ramp limitation

19
Results (ramp limitation)
20
Results (ramp limitation)
21
Index

1. Introduction
2. Power fluctuations
3. Wind farm fuel cell hybrid system
4. Results
5. Conclusions

22
Conclusions

• The model enables the fuel cell to generate
  energy as a function of the total power variation
  in real time.
• As a consequence, power fluctuations get
  considerably lower.
• When regulation technics are applied to the wind
  farm the improvement is higher. Moreover, since
  the fuel cell produces power depending on the
  fluctuations of the wind farm, and these are
  lower because of the ramp limitation, the
  variation in its production is lower too, which
  means better behaviour and easier implementation
  in a real device.

23
Wind farm fuel cell hybrid energy system for
reducing power fluctuations in wind farms
J. E. Villena-Lapaz1, A. Vigueras-Rodríguez1, E.
Gómez-Lázaro1, A. Molina-García2, J. A.
Fuentes-Moreno2 1Renewable Energy Research
Institute (IER), University of Castilla-La
Mancha 2Department of Electrical Engineering,
Universidad Politécnica de Cartagena
European Wind Energy Conference, Warsaw 23rd of
April 2010