1. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print),
ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME
35
FAULT STABILITY ANALYSIS OF PMSG BASED WIND TURBINES
THROUGH ENHANCED CONTROL STRATEGY
Anas Abdulqader khalaf
Research scholar, Department of Electrical Engineering Bharati Vidyapeeth Deemed University
College of Engineering Pune
Prof. P.D.Bharadwaj
Assistance Professor, Department of Electrical Engineering Bharati Vidyapeeth Deemed University
College of Engineering Pune
ABSTRACT
Stations that run on electric power production of energies employer is wind power - as
technology be a healthy environment disbursement of oil may be non-existent and more dynamic and
depend on the nature and especially the movement of wind and the cost of a simple piece increased
interest by the consumer - and one of the types of engines that are used by engine wind PMSG is a
device fluctuates according to the volatility of the atmosphere, especially wind speed and electric
power unsteady be important in the network to produce electric power by the movement and
direction of the wind - is important to intervene network with wind power inverter where - there are
good things and some not so good use generators variable interval and speed - and a magnet
permanently be mostly from based on wind generator to change load WECS bearing on the
conditions of network variable - in technology generator has the ability to turn side to reduce the
oscillations obtained from the train engine and is controlled by the part of the network by controlling
- and there are laws that bind b laws that serve the network control - and works to reduce to some
extent the changes that occur in the network and with the mistakes that may occur on the side of the
network - in some generators often, reduce current by converting automatically by the generator and
keep any effort strategy compared to Alternative Carriers Dc chopper.
Index Terms: DC CHOPPER, DC LINK, PMSG, WECS.
INTERNATIONAL JOURNAL OF ELECTRICAL ENGINEERING &
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ISSN 0976 – 6545(Print)
ISSN 0976 – 6553(Online)
Volume 5, Issue 6, June (2014), pp. 35-43
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2. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print),
ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME
36
II. LITERATURE SURVEY
There is a strong need for the suggested control strategy to improve the stability of a well,
such as easing restrictions effort, and control the current rise and oscillation damping force. Next to
the good monitor strategies, DC chopper plays a vital role in keeping the DC link voltage across the
capacitor on going. suggested control strategy helps to regulate current deformations when an error
occurs asymmetric grid and system parameters is also independent and simple to implement, which
that makes them attractive to the practice of engineering. However, such a strategy to respond to the
variables of sacrifice on the part of the generator and lead to a fluctuation, DC link voltage. It is
believed that big DC link capacitor can be helpful for improving the performance of the system in
the case of the use of the proposed strategy.
Design of the Generator-Side Converter, the Grid-Side Converter and BMSG BASED WECS.
Fig. 1: PMSG BASED WECS WITH DC CHOPPER.
Fig.2: PMSG BASED WECS WITH OUT DC CHOPPER

3. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print),
ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME
37
SIMULATION RESULTS WITH PROPOSED CONTROL SCHEME WITHOUT & WITH
CHOPPER
1) Operation with Symmetrical Grid Faults.
a)Operation with three phase to ground near Grid Faults.
2) Operation with Unsymmetrical Grid Faults:
a) Operation with Single phase to ground near Grid Faults
b) Operation with Dual phase to ground near Grid Faults
1) Operation with Symmetrical Grid Faults
a) Operation with three phase to ground near Grid Faults.
Without CHOPPER With CHOPPER
Fig.3: generator parameters like speed, torque and current output waveforms without and with
chopper circuit
Without CHOPPER With CHOPPER
Fig.4: DC capacitor voltage waveforms without and with chopper circuit

4. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print),
ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME
38
Without CHOPPER With CHOPPER
Fig.5: stator three phase voltage & current output waveforms without and with chopper circuit
Fig.6: stator three phase voltage & current output waveforms without and with chopper circuit
2) Operation With Unsymmetrical Grid Faults
a) Operation with Single phase to ground near Grid Faults
Without CHOPPER With CHOPPER
Fig.7: generator parameters like speed, torque and current output waveforms without and with
chopper circuit

5. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print),
ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME
39
Fig 8: Mechanical torque output waveforms without and with chopper circuit
Without dc chopper With dc chopper
Fig.9: DC capacitor voltage waveforms without and with chopper circuit
Without CHOPPER With dc chopper
Fig.10: stator three phase voltage & current output waveforms without and with chopper circuit

6. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print),
ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME
40
Without CHOPPER With dc chopper
Fig.11: Grid terminal three phase voltage & current output waveforms without and with chopper
circuit
b) Operation with Dual phase to ground near Grid Faults
Without CHOPPER With dc chopper
Fig 12: Mechanical torque output waveforms without and with chopper circuit

7. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print),
ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME
41
Without dc copper With dc chopper
with out dc chopper With dc chopper
Fig.13: stator three phase voltage & current output waveforms without and with chopper circuit
Without dc chopper With dc chopper

8. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print),
ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME
42
CONCLUSION
Speed of energy is the main reason why WECS preclude the ability and improve the balance -
this system may be based on a maximum limit on the devices Power - systems sometimes need a
technique developed that meet the needs of wattage - PMSG based WECS is strategy be working on
the basis of the generator are correct and be control by organizing force in the side of the network
and the changes that occur in the engine part may cause increased problems on thrusting, which does
not accept the basic idea - and control on the part of the birth of the b damping and collects rings
extra accuracy on the part of the network and gives speed and more accurate when error occurs in the
network-Dc chopper is controlled and change is necessary strategy required that cause changes
(distortions) and works to reduce when the error occurs - it is important for engineering designs to be
simple implementation and be responsive any variable occurs on the part of the generator and the
link voltage may cause volatility must strategy useful for some kind of change and about the best
piece to be Hai requested operation used when the error occurs.
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ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME
43
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