Transcript MINI UPS SYSTEM WITH INVERTER

VIGNAN’S LARA INSTITUTE OF
TECHNOLOGY AND SCIENCE
Aditya Pavan Kumar.T (08FE1A0202)
1
CONTENTS
 Abstract
 Objective
 Introduction
 Penetration
 AC Based Hybrid System
 Benefits
 Technical Difficulties
 Conclusion
 References
2
Abstract:
A wind-diesel hybrid system combines wind
turbine(s)with diesel generator(s) to obtain a
maximum contribution by the intermittent
wind resource while providing continuous high
quality electric power.
3
Objective:
Reduce system fossil fuel consumption
The more energy you use from your non-renewable
utility provider, the more these non-renewable resources
are wasted and the more harm is done to the
environment.
4
Introduction:
Wind power is expected to be economically attractive,
but wind power generation is variable and unpredictable.
The hybrid wind power with diesel generation has been
suggested (Hunter, 1994) and (Lipmann, 1989) to handle
the problem above. A hybrid wind diesel system is very
reliable because the diesel acts as a cushion to take care
of variation in wind speed and would always maintain an
average power equal to the set point.
5
BLOCK DIAGRAM
6
Penetration:
Instantaneous Penetration:
Instantaneous Penetration
=
Wind Power Output (kW)
–––––––––––––––––––––––– .
Primary Electrical Load (kW)
Average Penetration:
Average Penetration
Wind Energy Produced (kWh)
= ––––––––––––––––––––––––––– .
Primary Energy Demand (kWh)
7
AC Based Hybrid System
•Low penetration systems -Wind acts as a negative load, very little control or
integration of wind turbines into the power system is needed.
•Medium penetration systems -Wind becomes a major part of the power
system but diesel engines still provide much of the system power control.
Additional components and limited supervisory control required to assist
diesels in maintaining power quality.
•High penetration systems -Completely integrated power system with
advanced control. Diesel generators shut off when not needed. Limited
operational control of system by plant staff.
8
AC Based Hybrid System
9
Low Penetration System:
•Generally easy integration with existing diesel system, little or no diesel
modifications required.
•Diesel engines provide all frequency, voltage and reactive power control
requirements.
•Switch gear would need to be modified to add turbines and turbine control
software installed.
•Modest fuel savings of up to ~20% possible
10
11
Medium Penetration System
•Diesel(s) are expected to operate at all times and provide main system
stability control.
•Will need devices to help control system frequency, eliminate excess energy
and provide VAR support.
•Secondary diesels may be shut off when not needed, reduces diesel operating
hours and fuel use.
•In high peak wind periods, primary diesel runs at low loading.
12
Medium Penetration System
13
High Penetration System
•Use of wind allows all diesel engines to shut down during mid to high wind
periods, reducing fuel consumption and operation hours
•Other hardware used to maintain system voltage, frequency, and reactive
power requirements
•System controller continually monitors power system and dispatched
equipment as needed to maintain system integrity
14
High Penetration System (without Storage)
15
High Penetration System (With Storage)
16
Benefits:
• Reduced system operating costs.
• Reduced environmental impacts.
•Reduced fuel consumption .
•Can be the most economic option
where fuel is expensive and the renewable energy source is good.
• Increased Reliability
17
Technical difficulties:
•High cost:
Power in rural areas is always expensive, but many elements drive up the
cost of wind in rural areas.
•New Technology:
Wind-diesel technologies are relatively new, implementation in rural areas
can be operationally challenging.
18
Conclusions:
•Given good wind resource and adequate project density ,high penetration
wind-diesel systems can provide least life cycle cost of electricity in remote
communities.
•Isolated communities, mining sites and other industrial outposts need to
replace their expensive, polluting diesel generators with hybrid power systems
that use wind.
19
References:
Ackermann, T. (2005), Wind Power in Power Systems, John Wiley & Sons. Hunter
R.E.G. (1994), Wind-diesel systems a guide to technology and its implementation,
Cambridge University Press. Lipman NH. (1989), Wind-diesel and autonomous energy
systems, Elservier Science Publishers Ltd.
Bhatti T.S., Al-Ademi A.A.F. & Bansal N.K. (1997), Load frequency control of
isolated wind diesel hybrid power systems, International Journal of Energy Conversion
and Management, Vol. 39, pp. 829-837.
http://www.iser.uaa.alaska.edu/Publications/wind_diesel10022010.pdf
http://en.wikipedia.org/wiki/Wind_hybrid_power_systems
http://energy-alaska.wikidot.com/wind-diesel-applications
20
Thank You
21