ABSTRACT:
Micro-grid
system is currently a conceptual solution to fulfil the commitment of reliable
power delivery for future power systems. Renewable power sources such as wind
and hydro offer the best potential for emission free power for future
micro-grid systems. This paper presents a micro-grid system based on wind and
hydro power sources and addresses issues related to operation, control, and stability
of the system. The micro-grid system investigated in this paper represents a
case study in Newfoundland, Canada. It consists of a small hydro generation
unit and a wind farm that contains nine variable speed, double-fed induction
generator based wind turbines. Using Matlab/Simulink, the system is modelled and
simulated to identify the technical issues involved in the operation of a
micro-grid system based on renewable power generation units. The operational
modes, technical challenges and a brief outline of conceptual approaches to
addressing some of the technical issues are presented for further
investigation.
KEYWORDS:
1. Renewable
power generation
2. Distributed
generation
3.
Micro-grid, Simulation.
SOFTWARE: MATLAB/SIMULINK
BLOCK DIAGRAM:
Fig.
1. The micro-grid system currently under investigation
EXPECTED SIMULATION RESULTS:
Fig. 2. (a) Wind speed
profile, (b) WPGS output power, (c) HGU output power, (d) Voltage at bus 1
Fig. 3. (a) Micro-grid
frequency (Hz), (b) WPGS output power, (c) HGU output power, (d) Voltage at bus
1
Fig. 4. (a) Micro-grid frequency (Hz),
(b) WPGS output power, (c) HGU output power, (d) Voltage at bus 1
CONCLUSION:
Micro-grid
operation of a system based on renewable power generation units is presented in
this paper. The system behavior and technical issues involved with three
operational modes in micro grid scheme are identified and discussed. The
investigation is performed based on simulation results using Matlab/Simulink software
package. Simulation results indicate that dump load and suitable storage system
along with proper control scheme are additionally required for the operation of
the study system in a micro-grid scheme. A control coordinator and monitoring
system is also required to monitor micro-grid system state and decide the necessary
control action for an operational mode. The required control schemes
development for the proposed micro-grid system is currently under investigation
by the authors.
REFERENCES:
[1]
T. Ackermann and V. Knyazkin, “Interaction between distributed generation and
the distribution network: Operation aspects”, Second Int. Symp. Distributed
Generations: Power System Market Aspects, Stockholm, Sweden, 2002.
[2]
C. Abbey, F. Katiraei, C. Brothers, “Integration of distributed generation and
wind energy in Canada”, Invited paper IEEE Power Engineering Society General
Meeting and Conference, Montreal, Canada, June 18-22, 2006.
[3]
Frede Blaabjerg, Remus Teodorescu, Marco Liserre, Adrian V. Timbus, “Overview
of control and grid synchronization for distributed power generation systems”,
IEEE Transactions on Industrial Electronics, Vol. 53, No. 5,October 2006.
[4]
F. Katiraei, C. Abbey, Richard Bahry, “Analysis of voltage regulation problem
for 25kV distribution network with distributed generation”, IEEE Power
Engineering Society General Meeting, Montreal, 2006.
[5]
R. H. Lasseter, “Microgrids (distributed power generation)”, IEEE Power Engineering
Society Winter Meeting, Vol. 01, pp. 146-149, Columbus, Ohio, Feb 2001.
