INDEXSr. No. Title Author Subject Page No.

1 The Balanced Scorecard: As A Performance Measurement System

Dr. Vinod K. Ramani Accountancy 1-2

2 Corporate Mergers and Acquisitions: Legal, Accounting and Strategic Issues

Mira J. Bhanderi Accountancy 3-4

3 Morphometric analysis of the Sisi river basin, North-East India and some geo-environmental implications

Dr. Uttam Goswami Applied Geology

5-6

4 Careful Evaluation of CARE’s Performance Dr. Bheemanagouda Commerce 7-8

5 Advertisements on Passenger Cars - An Innovative Idea for Outdoor Advertising

Dr. Sangapa Rampure Commerce 9-10

6 Knowledge Management And Knowledge Process Outsourcing

Dr.Santos Singh Bais Commerce 11-13

7 A Study on Micro, Small and Medium Enterprises, Using Sms Marketing as a Tool

Dr.S P. Mathiraj, Mr Anil B. Malali

Commerce 14-16

8 Economic Value Added Dr. Kishor V. Bhesaniya Commerce 17-20

9 CHALLENGES IN COMMERCE DUE TO GLOBALIZATION

Mr. T. Kalimuthu, Dr. R. Ganapathi

Commerce 21-23

10 Estimating Reliability of Component Based Software Using Artificial Neural Network

Mr. Harish Rathod , Mr. Mahesh Parmar, Miss. Rekha Teraiya

Computer Science

24-26

11 Foreign Direct Investment (Fdi), Special Economic Zones (Sezs) And Economic Developments In India: An Empirical Study

M. Marimuthu Economics 27-29

12 Environmental Impact On Agriculture: WTO And Indian Economic Reforms

Dr.Shivasharanappa Dhaba

Economics 30-31

13 Study of regional rural water supply scheme-Kutch Niketa Patel Economics 32-34

14 An Overview of Indian economy of Unemployment in Depression

Dr. Dilip Arjune, Dr. Pawar Ashok S.

Economics 35-37

15 Kendriya Aarthsankalp 2011-12 and 2012-13 ke Tulnatmak Adhayan

Dr. Pawar Ashok S., Dr. Sunita J. Rathod, Shri. Budhwant R.G.

Economics 38-42

16 ADEPTS: Innovative Self-Evaluation Technique for Teachers

Dr. Pawar Ashok S., Dr. Vishal Tayade,Dr. Sunita Rathod

Economics 43-44

17 Bharatiya thet parikiy gunvantkiye dhoran Dr. Pawar Ashok S. Economics 45-48

18 European Euro Sankat and Vyaparchakrache Jagtik Parinam

Dr. Pawar Ashok S., Dr. Sunita J. Rathod, Umare Vilas Devchand

Economics 49-52

19 Higher Education in India: An Appraisal Dr. Sukhwinder Singh jolly

Education 53-56

20 An Investigation on test Anxiety In L2 Learners S. Gandhimathi , Dr. R. Ganesan

Education 57-58

21 Organizational Commitment and Self esteem of Faculty Members of Secondary Level Teacher Training Programme in Mysore

Mr. Moslem Cherabin, Dr. Praveena K. B.

Education 59-61

22 Comparative Analysis on Various Coded Cooperaative Networks

Pallavi Ingle Electronics and Communication

62-64

23 Effect of Plasma Arc Cutting Speed-voltage On the Unevenness of Hardox-400 Material

A. A. Darji, S. P. Patel, J.V.Desai

Engineering 65-67

24 Design and Simulation of High Speed,Low power Preamplifier Based CMOS Comparator

Gireeja Amin Engineering 68-70

25 Analysis of box culvert considering soil structure interaction

M.G. Kalyanshetti,S.V. Malkhare

Engineering 71-74

26 Soil erosion & Advance Techniques of Soil Conservation Manish Gujarati,Prof. H. M. Gandhi

Engineering 75-77

27 Cotton Crop Performance and Economics under Drip Irrigation at Various Water Application Levels

Jignesh. A. Shah Engineering 78-80

28 Cotton Crop Response to Thermal Regimes under Surface Irrigation at Stress Free Water Application Level

Jignesh A.Shah Engineering 81-82

29 Simulation of Line and Phase Voltages of Inverter Using Switching Function Concept

Prachi M. Palpankar, A.Y.Fadnis

Engineering 83-85

30 Microgrid : A Planning Based on Renewable Sources In Amravati District

Shweta. L. Tiwari, Dr.R.M. Moharil

Engineering 86-89

31 “Phenomenological Modeling of Four Stroke Compression Ignition Engine Processes”

V. M. Makwana Engineering 90-94

32 Designing Aspects of Cryogenic Attachment For Uv/Visible Spectrophotomer

Yagnesh B. Chauhan, Hardik B. Patel, J.M.Patel, Dr. U.S.Joshi

Engineering 95-98

33 Comparison Of Conventional 60/70 grade of Bitumen with CRMB60 for Roads

Zala Kartik S., Mandowara Nirajkumar P., Prof. C.B.Mishra, Dr. F.S.Umrigar

Engineering 99-100

34 Modelling And Analysis of Faults In Wind Based Doubly-Fed Induction Generator

K. Keerthi Deepika,A. Srinivasa Rao

Engineering 101-104

35 Multipoint Hand Gesture Recognition Using Robotic Arm Control

Nishant Madhukar Labhane, Prashant Harsh, Meghan Kulkarni

Engineering 105-107

36 Assessment of Sediment Distribution Hiral Shah, N. N. Borad, R. K. Jain

Engineering 108-111

37 Review and Analysis of Drought Monitoring and Management

Patel Jaydeepkumar J., Prof. G.V.Dihora

Engineering 112-114

38 Flow Forecasting of Tapi River At Mandvi Station By ANN Gajjar Kamleshkumar Hasmukhbhai,Prof. H.M.Gandhi

Engineering 115-118

39 Implementation of Digital Watermarking by Combined Transform Domain Algorithm for Copyright Authentication using Matlab

Raval Keta J., Mrs. Sameena Zafar

Engineering 119-121

40 Use of Rubber Dam In Tapi River Front Development At Surat City

Sagar D Patel, Kiran R.Shah, PROF.R.B.Khasiya

Engineering 122-124

41 Mahatma Gandhi's Ultimate to the Globalization Dr. Ashok Shankarrao Pawar

Engineering 125-129

42 Determination of Reservoir Operating Rules for A Single Reservoir - A case study (March 2012)

J.C.Solanki,B. K.P.Sthar, C. Prof.A.T.Motiai

Engineering 130-132

43 Flow Equation For Elliptical Weir Jigar H. Gamit Engineering 133-135

44 Reducing the Effect of Flood through River Training Work on Shedhi River at Khumarvada Village of Kheda District, Gujarat

Suthar Kandarp kumar P. , Solanki Jitendrasinh C.

Engineering 136-138

45 Case Studies in Community Initiated Rainwater Harvesting Dr Mahalaxmi Krishnan Environment 139-140

46 Impact of Human Activities on Mangroves Ecosystem Arvind A. Dhond Environment 141-143

47 Equator Principles an Innovative Tool for Environmental and Social Sustainability

Ashok R. Bantwa Finance 144-146

48 Investor Activism – The Icahn Effect Ch. Chaitanya Finance 147-149

49 Dividend policy – A fundamental signal Krunal K Bhuva, Dr. Vijay Vyas

Finance 150-151

50 Infrastructure Creation And Utilisation In Railways Mrs. K. Revathi,Dr. R. Ganapathi

General Management

152-154

51 Impact of Environmental Parameters on the Worker’s Work Capacity Involved in Organized Poultry Farm

Tulika Srivastava,Dr. Aditi Vats

Home Science 155-156

52 Impact of Electronic Communication Media on Consumers Sandhya Rani,Dr. Chhaya Shukla

Home Science 157-159

53 A Study On Employee’s Performance Appraisal With Reference To Mitsubishi Heavy Industry Tools Limited.

S.Ragothaman, D.Yuvaraj, S.Sridhar

Human Resource Management

160-162

54 Roles of the Expatriate Kapil Dev Upadhyay, Dr. (Prof.) Vijay Kumar Soni

Human Resource Management

163-164

55 English in Multicultural Society of Asia Bhaveshkumar Rana Literature 165-167

56 Need to Reform General English Syllabus at UG Level in the Affiliate Colleges of the University of Jammu: An Experimental Study

Dr. Wajahat Hussain Literature 168-169

57 A Study On Employee Retention for Sustaining the Talented Employees in Health Care Industry in a Private Multi-Speciality Organization

Dr C Swarnalatha,TS Prasanna

Management 170-172

58 Present Status Of Women Self Hep Groups In Tamilnadu M.Gurusamy, P.Uma Maheswari, C.Sangeetha

Management 173-175

59 Volatility In Indian Stock Markets Mr. Santanu Kumar Das

Management 176-180

60 Women Entrepreneurs: Role, Development and Contribution in Indian Economy

Siddharth Raval, Yupal Shukla

Management 181-182

61 Talent Management: A Bird Eye View Kalaspathi Vishwakarma

Management 183-184

62 Efficient Positioning For Sustained Leadership Ms.Asha Anotny , Ms.S.Anbu Selvi

Management 185-188

63 “An Imperical Study on Women’s Approach Towards Equity Market”

Ritesh Hasmukhlal Amarsela

Management 189-193

64 A Study on the Role of Securities Exchange Board of India (SEBI) Towards Insider Trading Practices in Indian Capital Market

V. Arockia Jerold Management 194-197

65 Profitability Of Commercial Banks With Special Reference To Indian Overseas Bank

Ms. R. Gokilavani,Dr. R. Ganapathi

Management 198-200

66 Brand Preference For Mineral Water With Reference To Pollachi

Dr. R. Ganapathi,G. Murali Manokari

Management 201-205

67 “ISO 9000 - Impact of Quality Systems on Business Performance”

Manisha Paliwal Management 206-207

68 Perceived Satisfaction of Mobile Prepaid Users and demographic factors

Dr. J. M. Badiyani Management 208-209

69 STUDY ON NPAs IN SBI WITH REFERENCE TO COIMBATORE

Ms. R. Gokilavani,Dr. R. Ganapathi

Management 210-213

70 Consumer Protection – Issues and Impediments In Rural Areas

Mrs. K. Revathi,Dr. R. Ganapathi

Management 214-216

71 Service Quality and Customer Satisfaction in Telecommunication Companies

Mr. Akshay Arora,Ms. Sujitha R

Management 217-219

72 To Study The Organizational Stress It’s Causes, Effects And Remedies of Private Banks At Bhavnagar Region

Mr. Vimal P. Jagad,Mr Mukesh .C Ajmera

Management 220-222

73 Case Study on Utilisation of ATM - With Reference To Erode Town

R. Gokilavani,Dr. R. Ganapathi

Management 223-226

74 Case Study Method – An Ideal Tool of Learning Mr. T. Kalimuthu,Dr. R. Ganapathi

Management 227-229

75 Ethics & Marketing: A Deep Connection Ashish Nathwani Marketing 230-232

76 The Emerging Role of HR in India Axaybharti N Goswami Marketing 233-234

77 Marketing Of Diamond Jewellery In Coimbatore – An Opinion Survey

Dr. R. Ganapathi, G. Murali Manokari

Marketing 235-237

78 A Study On Customer Satisfaction Towards Cable TV Services With Special Reference To Thirumangalam, Madurai District

K. Navarathinam,S. Anbu selvi

Marketing 238-240

79 Changing Consumer Behavior towards IPL Nirav R. Vyas,Dr. Vijay Vyas

Marketing 241-242

80 Q-Level Subnearring Of Q-Intuitionistic L-Fuzzy Subnearrings

M.M.Shanmugapriya, K.Arjunan

Mathematics 243-246

81 Effect of Selected Yogic, Aerobic Exercises and Combined Yogic and Aerobic Practices on Resting Pulse Rate

Dr. Shivarama Reddy. M , Dr. Manjappa. P

Physical Education

247-250

82 Analysis of Long Jump Performance T.Christopher Nallarasu Dr.V.Mahadevan

Physical Education

251-252

83 Panchayats and Women Self Help Groups: (A Study With Special Reference to Gulbarga District of Karnataka)

Dr. Pralhad Chengte Political Science

253-254

84 The Frustration among T.B.Patients-A Psychological study Dr.Kishor N. Mehta Psychology 255-256

85 Voice Activation Detection Algorithm for Estimating the Noise From Human Speech Signal

Kanu Patel,Sameena Zafar

Science 257-269

86 An Analysis of Changing Socio-Cultural Practices Among The Lambadas Of Andhra Pradesh

Dr. M. Sreedevi Xavier Sociology 260-262

87 Sociology of Art: A Theoretical Exploration Dr. Poonam Gandhi-Moirangthem

Sociology 263-265

88 Dalit Nari : Sthan, Paristithi avam Samsya Dr. H.L. Chavda Sociology 266-269

89 Ansuchit jatiyan me lagan sansthan bhal achal - jilla ahmedabad gujarat rajya ke vanshis sandarbhme

Dr. H.L. Chavda Sociology 270-272

90 Techniques of Steganography and Steganalysis Bhavsar Jaimin H, Imran Khan

Technology 273-276

91 Contributions of Tourism – An Analysis Dr. Bheemanagouda Tourism 277-278

Volume : 1 | Issue : 4 | April 2012 ISSN - 2250-1991

PARIPEX - INDIAN JOURNAL OF RESEARCH X 101

Research Paper

* GITAM Institute of Technology, GITAM University, Visakhaptnam, Andhra Pradesh

** Department of EEE, GIT, GITAM University, Andhra Pradesh

Engineering

Modelling And Analysis of Faults In Wind Based Doubly-Fed Induction Generator

* K. Keerthi Deepika ** A. Srinivasa Rao

Keywords : Wind power, doubly-fed induction generator, dynamic performance, mathematical modeling, decoupled control

Demand for wind power has increased considerably due to technological advances and favourable government policies. As a result, large wind farms with multi-megawatt capacity are connected to sub-transmission and transmission systems. With high penetrations of wind energy, performance of the overall system is affected by the technical impacts introduced by wind turbine generators (WTG). Fault current contributions from WTGs will have a significant impact on the protection and control of the wind farm as well as the interconnected system. This paper initially describes the modelling aspects of Doubly- Fed Induction Generator (DFIG) during steady state and faulty conditions. Vector decoupling control strategy has been adopted to establish the mathematical model of DFIG based wind generator. Further, a 9 MW wind farm with 6 units of 1.5 MW DFIG is modelled in Matlab/Simulink and, voltage and current waveforms are presented and discussed for symmetrical and asymmetrical faults created in the power system.

ABSTRACT

INTRODUCTIONAS per the projections made by Central Electricity Authority, the national electricity requirement in 2020 would be 1,643 bil-lion units. Fifteen percent of that would be green power added to grid by 2020. 15% would mean addition of installed capac-ity of about 89,690 MW of renewable based power projects by 2020. It is estimated that the maximum contribution of about 48,240 MW will have to come from wind. Wind will remain dominant technology till 2020 because of following reasons:· maturity of technology

· near commercial viability and grid parity

· well developed national market

· strong and indigenous manufacturing facilities

· high scalability

· short gestation period

· technology acceptable among corporates

· modularity

Experiences in countries with high penetration of wind power, such as Denmark, Spain, and Germany, have demonstrat-ed that this scenario is technically and economically feasi-ble. However, the rapid expansion of this energy has made it necessary to redesign the existing grid code requirements (GCR). As a result, large wind farms with multi-megawatt ca-pacity are connected to sub-transmission and transmission systems.

In order to guarantee the safety and reliability for wind power integration operation, it is of great significance to establish an appropriate wind power generator system model and analyze electro-magnetic transient characteristics.

I. Basic concepts of DFIGThe layout of a WT that is based on DFIG technology is shown in Fig. 1.

Fig. 1. DFIG connected to a grid

A doubly-fed induction generator is a standard wound rotor in-duction machine with its stator windings directly connected to grid and its rotor windings connected to the grid through an AC/DC/AC converter. AC/DC converter connected to rotor wind-ing is called rotor side converter and another DC/AC is grid side converter. Doubly-fed induction generator (DFIG), is used extensively for high-power wind applications. DFIG’s ability to control rotor currents allows for reactive power control and vari-able speed operation, so it can operate at maximum efficiency over a wide range of wind speeds. The aim of this paper is to develop a control method and analysis of dynamic perform-ance of DFIG’s rotor control capabilities for unbalanced stator voltages, grid disturbances and dynamic load condition.

II. DFIG wind turbine Modelling and ControlA. Overall control schemeThe overall structure of the DFIG based wind generator model can be divided into five parts: wind speed model, aero-dynamic model, pitch angle control model, mechanical drive model and DFIG model with its control system.

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102 X PARIPEX - INDIAN JOURNAL OF RESEARCH

The DFIG control structure, illustrated in Figure 2, contains the electrical control of the power converters, which is essen-tial for the DFIG wind turbine behaviour both in normal opera-tion and during fault conditions. The aim of the RSC is to con-trol independently the active and reactive power on the grid, while the GSC has to keep the dc-link capacitor voltage at a set value regardless of the magnitude and the direction of the rotor power and to guarantee a converter operation with unity power factor (zero reactive power). As illustrated in Figure 2, both RSC and GSC are controlled by a two stage controller. The first stage consists of very fast current controllers regulat-ing the rotor currents to reference values that are specified by a slower power controller.

Fig.2.Control structure of DFIG

In this paper Vector decoupling method is the core technol-ogy used. The electrical drive controls become more accu-rate in the sense that not only are the DC current and voltage controlled but also the three phase currents and voltages are managed by vector control. Control strategy can be divided into two stages: control of Grid Voltage Side Converter and Rotor Voltage Side Converter.

B. Control scheme of Grid side VSCThe equivalent circuit of grid connected inverter is shown in fig. 3.

Fig. 3 Equivalent circuit of Grid side controller Upon math-ematical simplifications, we get

(1)

(2)

Power exchange between Power Grid and Grid VSC is cal-culated as 3-phase power = 2 x line power in d-a axis frame

Active Power, 1.5( )r d d q qP e i e i= + (3)

Reactive power, 1.5( )r q d d qQ e i e i= − (4)

dIsdv I R L w L I vsd sd f f s f sq gddt= + − +

dIsqv I R L w L I vsq sq f f s f sd gqdt= + − +

Modelling of grid VSC is based on power decoupling control strategy. Here in this case while converting from stationary frame to rotating frame the Grid voltage is considered as ref-erence vector and d-axis is considered in the direction of Grid voltage.

So, vsd =e and vsq =0. (5)

Substituting the above in equations (3) and (4), we get

1.5r dP ei= (6)

1.5r qQ ei= − (7)

We get power decoupling strategy i.e. active power is only dependent on d-axis current and reactive power is only de-pendent on q-axis current. Since current cannot be controlled, current should be transformed to voltage and the references voltages which are in synchronous frame are applied to Grid VSC Pulse width Modulation, which generates required puls-es to fire the IGBT s.

Using the relation of eq. (5),

From eq. 1 we getdIsdv I R L w L I vsd sd f f s f sq gddt

= + − + (8)

or, * ( )

dIsdv e w L I I R Ld s f sq sd f f dt= + − +

(9)

And from eq. 3, we get

10 sqsq sq f f f sd gq

dIv I R L w L I v

dt= = + + +

(10)

or, * ( )1

dIsqv w L I I R Lq f sd sq f f dt= − − + (11)

DFIG should be mathematically modelled first to apply the control scheme of Rotor VSC.

C. Mathematical modeling of DFIGModelling of Rotor Voltage Side Converter(VSC) is based on power decoupling control strategy. Stator flux oriented vector control scheme is adopted where the stator flux is considered as reference frame.

Under assumption of linear magnetic circuits and balanced operating conditions, the equivalent two-phase model of the symmetrical DFIG, represented in an arbitrary rotating (d-q) reference frame is:

1sd

sd sd sqdv i Rs dtψ ωψ= + − (12)

1sq

sq sq sd

dv i Rs dt

ψωψ= + +

(13)

1( )rdrd rd r rq

dv i Rdtψ ω ω ψ= + − −

(14)

1( )rqrq rq r rd

dv i R

dtψ

ω ω ψ= + + − (15)

Stator Power equations are:

P v i v is sd sd sq sq= + (16)

Q v i v is sq sd sd sq= − (17)

Volume : 1 | Issue : 4 | April 2012 ISSN - 2250-1991

PARIPEX - INDIAN JOURNAL OF RESEARCH X 103

D. Control scheme of Rotor side VSCIn rotor control scheme the stator flux is assumed as refer-ence and d-axis is set along stator flux and stator voltage which is perpendicular to the flux becomes equal to zero .i.e.,

, 0, & 0v v vsd s sq sd s sqψ ψ ψ= = = = (18)

( )L is m rdQ vs s Ls

ψ −=

(19)

Using (18), (19) in (16), (17), we get stator power equations as:

L im rqP vs s Ls= −

(20)

( )L is m rdQ vs s Ls

ψ −=

(21)

From the above equations it can be observed that the power decoupling control is possible in rotor scheme and active power is dependent on q-axis current and Reactive power is dependent on d-axis rotor current respectively. Since currents cannot be controlled, the currents are converted to respective reference voltages in synchronous frame of reference.Let 2L L Ls r m

Lsσ

− =

(22)

Combining (15), (18), (20), we get

* 1Ld sv i R i sw ird rd r rd rq sdt Ls

σ σ ψ= + − + (23)

* 1 1Ld mv i R i sw i swrq rq r rq rd sdt Ls

σ σ ψ= + − + (24)

The above inputs are applied to rotor VSC PWM Modulation which generates pulses for firing the IGBTs in rotor VSC circuit.

III. Case studyThe purpose of this study is to understand the behaviour of a wind farm with DFIGs, under different faulty conditions. A 9 MW wind farm with six DFIG based wind turbine generators, each having a capacity of 1.5 MW has been considered in this study. A 3-phase fault and a phase to phase fault have been created in the power system. Time domain voltage and current waveforms at generator terminal is observed for 0.02 seconds. Simulations start at t=0 sec and faults are created at t=0.04sec. Faults are cleared after 0.02 sec at t=0.06 sec. Fault resistance has been kept constant at 0.001Ω.

A. Three Phase fault A three phase fault is created at the generator terminal at t=0.04s and cleared at t=0.06s.Fig.4 and Fig.5 show the volt-age and current waveforms respectively at the generator terminal. During the fault, voltages of all three phases reach very low values as shown in Fig.4. Ideally this should reach to zero, but in practice, there will be some fault resistance and hence will have a very small magnitude voltage values. Gen-erator terminal current will suddenly increase at the instant of fault initiation as shown in Fig.5, followed by a rapid decay as determined by the transient impedance of the generator.

Fig. 4. Voltage at the generator terminal for a 3-phase fault

Fig. 5. Current at the generator terminal for a 3-phase fault

Fig. 6. Rotor current for a 3-phase fault

Fig. 7. Active power

Fig. 8. Reactive power

Fig. 9. DC link voltage during a 3-phase fault

In the fault moment, as the stator voltage decreases signifi-cantly, high current transients appear in the stator and rotor windings. As a demonstration the rotor current is plotted in fig. 6. In order to compensate for the increasing rotor cur-rent, the rotor side converter increases the rotor voltage refer-ence, which implies a “rush” of power from the rotor terminals through the converter, as shown in fig.8.

On the other side, as the grid voltage has dropped imme-diately after the fault, the grid side converter is not able to transfer the whole power from the rotor through the converter

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104 X PARIPEX - INDIAN JOURNAL OF RESEARCH

further to the grid. Thus the control of the dc-voltage by grid side controller reaches quickly its limitation. As a result, the additional energy goes into charging the dc-bus capacitor and the dc-voltage rises rapidly as shown in fig. 9.

IV. ConclusionThis paper presents a study of the dynamic performance of variable speed DFIG coupled with wind turbine and the power system is subjected three phase fault and phase-to-phase fault. The dynamic behaviour of DFIG under power system disturbance was simulated using MATLAB/ SIMULINK plat-form using vector control concept. Accurate transient simu-lations are required to investigate the influence of the wind power on the power system stability.

The DFIG considered in this analysis is a wound rotor induc-

tion generator with slip rings. The stator is directly connected to the grid and the rotor is interface via a back to back partial scale power converter (VSC). Power converter are usually controlled utilizing vector control techniques which allow the decoupled control of both active and reactive power flow to the grid.

In this paper, a 9 MW wind farm is modelled and simulated for symmetrical and asymmetrical faults at generator terminal in the power system. Voltage and current waveforms are pre-sented and compared with those under ideal fault conditions. Authors conclude that understanding fault current behaviour will help in selecting proper instrument transformers, switch-gear and control gear, and in designing effective protection systems.

REFERENCES

1. G.H. LI, B.H. ZHANG, Z.G. HAO, J. WANG AND Z.Q. BO, DAVID WRITER, TONY YIP, “ MODELLING OF DFIG BASED WIND GENERATOR AND TRANSIENT CHARACTERISTICS ANALYSIS”, PROCEEDINGS OF EEEIC,2011, PAGES 1-4 | 2. W. LEONHARD, CONTROL OF ELECTRICAL DRIVES, SPRINGER, 1996. | 3. “ANALYSIS, MODELLING AND CONTROL OF DOUBLY FED INDUCTION GENERATORS FOR WIND TURBINES”, DAMASCUS UNIV. JOURNAL VOL. (23)-NO. (1)2007 | 4. “MODELLING AND CONTROL OF THE DOUBLY FED INDUCTION GENERATOR WIND TURBINE”, ELSEVIER, JUNE 2010. | 5.FIELD ORIENTED CONTROL OF AC DRIVES, LITERATURE NUMBER:BPPRA073,TEXAS INSTRUMENTS EUROPE, FEBRUARY 1998. | 6. P.C.KRAUSE, O.WASYNCZUK AND S.D.SUDOFF. ANALYSIS OF LECTRIC MACHINEY AND DRIVE SYSTEMS, WILEY, 2002. | 7. MATLAB/SIMULINK/SIMPOWERSYSTEMSTM, VER 7.9.0(R2009B), USER’S GUIDE AND REFERENCE

Volume : 1 | Issue : 4 | April 2012 ISSN - 2250-1991

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