ANNUAL REPORT 2018

Hydropower Simulation LaboratoryDept. of Water Resources Development & Management

IIT ROORKEE

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People

B. ANIL KUMAR Research Scholar Research Scholar

C. CARUNAISELVANE

Research ScholarJAVED ALI

NASEER FAIZIM.Tech Student

CHAMKAUR SINGH ADDISr. Technical Superintendent

M. CHANDRASEKARSenior Research Fellow

UGC - Junior Research Fellow RUPESH KUMARI

R.R. SEMWAL Research Scholar (Part Time)

PROF. THANGA RAJ CHELLIAH

Hydropower Simulation LabOfcer - in - Charge

D. KARTHIKSenior Research Fellow

MORIE BAYOH KOBBA M.Tech Student

Senior Research FellowRAGHU SELVARAJ

VIDYASAGAR TUMMAKURIProject Associate

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Contents

Research Projects....................................................................05

Research Publications..............................................................07

About the Laboratory................................................................03

Awards & Abroad Visits............................................................09

Distinguished Visitors to the Laboratory...................................15

2017 Highlights........................................................................12

Ph.D. Awarded......................................................................... ....14

R & D Meetings........................................................................10

Short Article : Should Variable Speed Technology In Large Hydro

Power Plant be Confirmative or Negative?................................ ....16

Short Term Courses..................................................................11

About The Laboratory

2. Possible grid disturbances are created with the help of programmable AC Power source

and analyze the performance of hydro-generating equipments.

† Equipment & Software available in the laboratory: The laboratory is well equipped with

synchronous and asynchronous generators, power electronic converters, digital signal

processors and dSPACE control kits, power quality analyzers, programmable power supplies

and software packages including MATLAB, SIMSEN, and PLECS. In addition, procurement of

a real time simulator from Opal – RT Technologies is under progress.

† To support the simulation study, the following additional facilities are developed.

† Full Spectrum Simulator: The laboratory has signed an MoU with Centre for Development of

Advanced Computing, Thiruvananthapuram for Full Spectrum Simulator (Mini) program

under the support of National Mission on Power Electronics Technology (NAMPET), Ministry

of Electronics and Information Technology (MeitY).

1. Real time interface, through DS 1104 and DS 1202 microlabbox, of simulation tool with the

prototype model of various generators used in hydropower plants.

† Collaborative/Sponsored Research: The laboratory is committed for the research in

support of national and international organizations including THDC India Limited (Rishikesh),

Central Power Research Institute (Bangalore), Department of Science of Technology (New

Delhi), and Ministry of Shipping (New Delhi). In addition, the laboratory is collaborated with the

Indian Maritime University (Vishakapatinam) through a research project.

† Unique features: It deals with the simulation of graphical input/output of the various

components of a hydropower plant, including the dam, penstock, hydro-mechanical

equipments, hydro-generators (both synchronous and asynchronous in large capacity), multi-

channel power electronic circuits for excitation and variable speed operation, grid interface,

etc.

† Hydropower Simulation Laboratory (HSL) is a part of Dept. of Water Resources Development

and Management, Indian Institute of Technology Roorkee. It aims to model and simulate

hydroelectric systems and to validate the developed models through laboratory prototype.

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† Courses offered: The laboratory offers a PG course entitled “Modelling and Simulation of

Hydro-Electric Energy Systems” which provides a platform for the P.G/Ph.D students to share

their views and experience among industrialists, fellow researchers, and academicians in the

emerging areas of hydropower engineering.

† Targets/Goals in the next five years:

† Development of software solutions for renovation and modernization of Indian

hydropower plants.

† Create an industrial collaboration for hydropower real-time simulation.

† Development of power and control circuit redundancy in variable speed hydro.

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Research Projects (2018)

Strand 1: Completed & Ongoing Tehri Hydropower Development Corp. (I) Ltd Topic | Analysis of Dynamic Performance of Variable Speed Hydroelectric Plants under Grid Disturbances. |Completed

Central Power Research Institute, Bangalore

Principal Investigator | Prof. Thanga Raj Chelliah

Topic | Design and Experimental Validation of Battery Operated

Principal Investigator | Prof. Thanga Raj Chelliah

Ministry of Shipping, Govt. of India

Ministry of Shipping, Govt. of India

in Tugboats to Improve Fuel Efficiency. | Ongoing

Status | Accepted for funding

Principal Investigator | Prof. Thanga Raj Chelliah

Principal Investigator | Prof. Thanga Raj Chelliah

Topic | Reduction of Switching Transients in Doubly Fed

Topic |Doubly-Fed Induction Machine as a Propulsion Motor

Short Endurance Vessels with Wireless Charging Circuit.

Induction Machines used in Large Pumped Storage Plants. |Completed

Principal Investigator | Prof. Thanga Raj Chelliah

Central Power Research Institute, Bangalore Topic | Design of Fault Tolerance and Reconfiguration Control for Megawatt

Power Electronic Converters Fed Variable Speed Pumped Storage Units. Status | Accepted for funding

Strand 2: Upcoming Projects

Tehri Hydropower Development Corp. (I) LtdTopic |Analysis and Mitigation of Active Power Oscillations in Hydro-Generators Fed High Voltage Transmission Lines.Status | Accepted for funding Principal Investigator | Prof. Thanga Raj Chelliah

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Topic | Power-Hardware-In-Loop Simulation for 25MW Power Electronic Converters Fed 250MW Hydro-Generating Unit.

National Mission on Power Electronics Technology, India

Ministry of Human Resource Development, India Topic | Design of Active Thermal Control Systems for Multi-MW Power

Converters Serving to Large Rated Adjustable Speed Hydro Generating Unit.Collaborator | Dept. of Energy Technology | Aalborg University Denmark

Principal Investigator | Prof. Thanga Raj Chelliah

Collaborator | IISc, IITB, NITT, IIEST Shibpur and CDAC-T Principal Investigator | Prof. Thanga Raj Chelliah

Strand 3: Projects submitted for funding

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Research Publications (2018)Strand 1: Patent

Strand 2: Peer Reviewed Journals

† Thanga Raj Chelliah, Anto Joseph, Rajasingh R., Karthik D., Deepak Khare,“Energy

Efficient Starting of Pump Turbine Equipped with Doubly Fed Induction Machine”, Accepted

by IITR-IPR Cell and forwarded to patent office.

† R. Rajasingh, Raghu Selvaraj, Harshit Mohan and Thanga Raj Chelliah,"Dynamic

Performance of Doubly-Fed Hydroelectric Machines under Voltage Unbalance – A Relative

Electro-Thermomechanical Analysis", IEEE Trans. Industry Applications, Vol. 54, No.5,

2018.

† Raghu Selvaraj, Thanga Raj Chelliah, Deepak Khare and C. Bharatiraja,"Fault Tolerant

Operation of Parallel Connected 3L- Neutral-Point Clamped Back-to-Back Converters

Serving to Large Hydro-Generating Units", IEEE Trans. Industry Applications,Vol. 54, No.5,

2018.

† Anto Joseph, S. Raghu, Thanga Raj Chelliah and S.V. Appa Sarma, “Starting and Braking of

a Large Variable Speed Hydro-Generating Unit Subjected to Converter and Sensor Faults”,

IEEE Trans. Industry Applications, Vol. 54, No.4, 2018.

† Anto Joseph, D. Karthik, R. R. Semwal, Thanga Raj Chelliah,and Deepak Khare, "Dynamic

Performance of Pumping Mode of 250 MW Variable Speed Hydro-Generating Unit Subjected

to Power and Control Circuit Faults", IEEE Trans. Energy Conversion, Vol. 33, No.1, 2018.

† Anto Joseph and Thanga Raj Chelliah,"Fault Diagnosis and Fault Tolerant Control of

Megawatt Power Electronic Converters Fed Large Asynchronous Hydro-Generator", IEEE

Journal of Emerging and Selected Topics in Power Electronics (Accepted for Publication).

† C. Bharatiraja, S. Raghu, T. R. Chelliah, M. Tariq, and J. L. Munda,"Design and

implementation of fourth arm for elimination of bearing current in NPC-MLI fed Induction

motor drive", IEEE Trans. Industry Applications, Vol. 54, No.1, 2018.

† Anto Joseph and Thanga Raj Chelliah,"A Review of Power Electronic Converters for Variable

Speed Pumped Storage Plants: Configurations, Operational Challenges, and Future

scopes", IEEE Journal Of Emerging and Selected Topics In Power Electronics, Vol. 6, No.1,

2018.

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Strand 3: International Conference Proceedings

† Karthik Desingu, Raghu Selavraj, Thanga Raj Chelliah,"Thermal Loading of Multi-Megawatt

Medium-Voltage Power Converters Serving to Variable Speed Large Pumped Storage

Units", IEEE Power Electronics, Drives and Energy Systems Conference, IIT Madras, 18-21

December 2018.

† C. Carunaiselvane, Thanga Raj Chelliah, Appa Sarma S. V.,“Vibration Analysis of a

Continuously Overloaded Large Hydrogenerator at Load Rejection”, th 20 International

Seminar on Hydropower Plants, 14-16 November 2018, Austria.

† Karthik D., S. Raghu, Thanga Raj Chelliah, D. Khare,“Effective Utilization of Parallel

Connected Megawatt Three-Level Back-to-Back Power Converters in Variable Speed

Pumped Storage Units", rd53 IEEE IAS Annual Meeting (USA), 23 – 27 September 2018.

† R. R. Semwal, Anto Joseph, Thanga Raj Chelliah,"Two - Stage Protection for multichannel

Power electronics converter fed large Asynchronous generating Unit", IEEE International

Power Electronics Conference (IEEE - IPEC), Niigata, Japan, 20-24 May 2018.

† B. Anil Kumar, M. Chandrasekar, Thanga Raj Chelliah, U. S. Ramesh, “Fuel Minimization in

Diesel-Electric Tugboat Considering Flywheel Energy Storage System”, 2018 IEEE

Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific),

Bangkok, 6 - 9 June 2018.

† B. Anil Kumar, M. Chandrasekar, Thanga Raj Chelliah, U. S. Ramesh,"Coordinated Control

of Electric Tugboats Considering Inductive Power Transfer for better Fuel Efficiency", IEEE

Power Electronics, Drives and Energy Systems Conference, IIT Madras, 18-21 December

2018.

† Rupesh Kumari, Thanga Raj Chelliah,"Development Trends and Future Prospects of Control

Systems Serving to Hydro-power Plant", IEEE Power Electronics, Drives and Energy

Systems Conference, IIT Madras, 18-21 December 2018.

† C. Carunaiselvane, Thanga Raj Chelliah,"Temperature Distribution of 250 MW Hydro

Turbine Synchronous Generator at Continuous Overloading Conditions", IEEE Power

Electronics, Drives and Energy Systems Conference, IIT Madras, 18-21 December 2018.

† C. Carunaiselvane, Thanga Raj Chelliah, Appa Sarma S. V.,"Negative Sequence Current

Capability of Megawatt Hydro Generators at Uprated Unbalanced Loads", IEEE Power

Electronics, Drives and Energy Systems Conference, IIT Madras, 18-21 December 2018.

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Awards & Abroad Visits (2018)Mr. D. Karthik, Senior Research Fellow of the

laboratory, received CSIR Travel Grant Award

to attend 2018 IEEE - IAS Annual Meeting held

at Portland, USA. He presented a research

paper entitled "Effective Utilization of Parallel

Connected Megawatt Three-Level Back-to-

Back Power Converters in Variable Speed

Pumped Storage Units" at the meeting.

Mr. C. Carunaiselvane, Research Scholar of

the laboratory, received CSIR Travel Grant

Award to at tend Viennahydro 2018

Conference, Austria during 14-16 November

2018. He presented a research paper entitled

“Vibration Analysis of a Continuously

Overloaded Large Hydrogenerator at Load

Rejection” at the conference.

Mr. N Sai Suprabhath, NIT Trichy worked in

the laboratory as a SPARK Fellow (May –

June 2018) and he won SPARK 2018 poster

award.

Prof. Thanga Raj Chelliah, officer- in- charge

of Laboratory, attended IEEE – International

Power Electronics Conference (IEEE – IPEC

2018) held at Niigata (JAPAN) during 20 – 24

May 2018 and presented his paper entitled,

“Two Stage Protection for Multichannel

Power Electronics Converters Fed Large

Asynchronous Generating Unit”. In addition,

he visited Prof. Akira Suguwara's Lab

(Archimedean Screw Lab) at Niigata

University.

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R & D Meetings Attended (2018)

Prof. Thanga Raj Chelliah and Prof. P. Jena, EED rd

attended R&D meeting held in THDC India Limited on 3

July 2018 and presented a research project proposal on

“Analysis and Mitigation of Active Power Oscillations in

Hydro Generator fed High Voltage Transmission Lines”.

Prof. Thanga Raj Chelliah attended R & D Conclave

organised by Central Electricity Authority (CEA) during

20 - 21 February 2018 and presented his research

findings entitled “Design challenges for redundancy in

power and control circuit of variable speed hydro

generating units”.

Prof. Thanga Raj Chelliah attended the meeting of R & D

Committee on Grid, Distr ibut ion and Energy

Conservation held in Central Power Research Institute

(Banglore) during 12 – 13 July 2018 and presented a

research project proposal on “Design of Fault Tolerance

and Reconfiguration Control for Megawatt Power

Electronic Converters Fed Variable Speed Pumped

Storage Units”.

Prof. Thanga Raj Chelliah attended R & D meeting chaired by Addl. Secretary and Financial thAdvisor of Ministry of Shipping held at Transport Bhawan (New Delhi) on 20 November 2018

and presented a research project proposal on “Design and Experimental Validation of Battery

Operated Short Endurance Vessels with Wireless Charging Circuit”. This research has

collaborated with Indian Maritime University, Vishakhapatnam.

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Short Term Courses (2018)

A five-day short term course on “Applications and Challenges in Multi-Channel Megawatt Power

Electronic Systems” was jointly organized by the Hydropower Simulation Laboratory, Dept. of

Water Resources Development and Management & Quality Improvement Programme Centre, IIT

Roorkee during July 16 –20, 2018. The course was financially supported by AICTE. Prof. Thanga

Raj Chelliah and Prof. Deepak Khare were course coordinators. Experts from IIT Roorkee, THDC

India Limited and Power Electronic Group of Centre for Development of Advanced Computing,

Thiruvananthapuram were delivered lectures.

in renewable energy applications.

The main objective of this course is to

d i s c u s s t h e a p p l i c a t i o n s a n d

challenges of large scale (megawatt)

power electronic systems among the

young teachers and field engineers

with the consideration of various issues

on these areas. The course is

structured in consideration of following

sub-objectives:

1. Discuss the necessity of multi

channel power electronic system

5. Discuss protection and power quality issues in multi-channel power electronic systems.

6. Discuss hydropower generation under varying climatic conditions.

2. Explore the megawatt power electronic technology to use as an efficient interface for variable

speed operation of large pumped hydropower plants, both pumping and generating modes.

3. Explore the operational challenges on megawatt multi-channel power electronic systems.

4. Explore the possibilities of fault tolerant control and/or redundancy of megawatt power

electronic systems.

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Ph.D Awarded (2018)

Name of Scholar : Dr. Anto Joseph

Duration : 2015 - 2018

Title of Research : Analysis of Dynamic Behavior of Variable

Speed Pump Storage Units under Converter

Faults

Current Affiliation : Post Doc. Scholar in Power Electronics

Laboratory, University of California, Irvine.

(to be joined)

Name of Scholar : Dr. R. Rajasingh

Current Affiliation : Associate Professor, VIT University, India.

Duration : 2012 - 2017

Title of Research : Des ig n a nd Deve lopm ent o f Ene rg y

Conservation Strategies for Asynchronous

Machine Drives

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Distinguished Visitors to the Laboratory

Shri. Pankaj Batra, Member (Planning),

Central Electricity Authority, India visited ththe laboratory on 25 January 2018.

Variable speed hydro generating

equipments and design challenges for

redundancy in power and control circuits

were discussed.

Shri. Gyan Bhadra Kumar, Sr.Vice-President th(Hydro), Jindal Energy visited the laboratory on 4

October 2018. Issues on continuous overloading

of Karcham Wangtoo Hydroelectric Plant (1000

MW), Himachal Pradesh were discussed.

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2017 Highlights

National Workshop on Power Electronics 2017 (NWPE 2017)

The fourth National Workshop on Power Electronics on the theme “Strengthening Grid energy

Storage through Power Electronics -Challenges and Research Opportunities” under the aegis of

National Mission on Power Electronics Technology (NaMPET-II) was organized by the Hydropower

Simulation Laboratory of Department of Water Resources Development and Management, IIT

Roorkee during October 9-11, 2017. There were 77 participants from industry, research

organizations, user agencies and educational institutions in India participated in this three days

event along with 3 stalls for industry for product/technology exhibitions. This was coordinated by

Prof. Thanga Raj Chelliah, Prof. Deepak Khare and Prof. S. P. Srivastava of IIT Roorkee.

The Workshop was inaugurated by Professor A. K. Chaturvedi, Director, IIT Roorkee and

Chief Guest for the function. Shri. Tara Shanker, Director, Ministry of Electronics and Information

Technology (MietY), Professor H. P. Khincha, Advisor IISc and former Vice Chancellor of VTU, and

Shri. B. Ramani, Executive Director of CDAC Thiruvananthapuram were the guests of honor.

Professor A. K. Tripathy, Former Director General, CPRI Bangalore was the Chief Guest of

the valedictory function. A special session for industry interaction was organized on the third day to

discuss the technology scenario and needs of the industry in the area of power electronics.

About 50 participants attended the session. Among them 23 industry participations

including ABB India Ltd., CDAC Thiruvananthapuram, CSIR - CECRI, GE India, BHEL, THDC India

Limited, Karnataka Power Transmission Corporation Ltd. and OPAL-RT Technologies. The

problems which are faced by industry and academic institutions and the way to collaborate to

achieve the technological requirements to both industry and for the society were discussed.

Co-Sponsors

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More details are available at: https://www.iitr.ac.in/nwpe2017

Photo Gallery - NWPE 2017

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Should Variable Speed Technology in Large Hydropower Plant be Confirmative or Negative?

Large DFIM unit with parallel converters has the disadvantage of not having redundancy

with power converter and control circuit in excitation system because of: (i) possibilities of over

voltage in rotor windings during the operation of breakers/contactors in converter redundant

process (ii) complexities in protection of power converters (detection of dynamic variation of rotor

frequency and dc component of rotor current) [1].

Cycloconverters and two level / three-level voltage source back-to-back converters are

prominent in the application of large rated variable speed hydro units. In comparison with

synchronous machines based fixed speed hydro units, the rating of excitation system equipped with

power electronic converter is quite large in DFIM fed variable speed PSP. The later one handles slip

power of the machine. It leads to choose parallel converters in this application by the project

developers in consultation with large PEC manufacturers.

In order to enable VSO, synchronous machines of fixed speed Pumped Storage Plants

(PSP) need to be driven with full scale power electronic converters (PEC). Such design of high

capacity PEC is not economical. Further, these full scale converters lead to increase the project cost

in case of underground power houses. Therefore, variable speed large PSP employing Doubly-Fed

Induction Machine (DFIM) with slip power rated PEC is an acceptable option for the storage dams

with wide variation in water head (e.g. Tehri dam, India [2]). Some examples of variable speed

hydrogenating units in operation are 2x400 MW DFIM (Ohkawachi, Japan), 2x300MW DFIM

(Goldisthal, Germany), 4x250MW DFIM (Linthal, Switzerland), 2x380MW DFIM (Frades II,

Portugal) and 4x250MW DFIM (under construction at the Tehri dam, India).

Hydropower Plant (HP) converts the energy of water in the stream and river into electricity. The

volume of water flow and the utilized head determine the quantity of electricity. The greater the flow

and head, more electricity produced. Usually, hydro-turbines are optimized for an operating point

defined by speed, head, and discharge. HPs that are constructed in the beginning of the 20th

century in the European continent were of fixed speed type employing synchronous machine and

the same were continually established in Asian and American continents also. At fixed speed

operation, limited deviation from head and discharge are allowed if the efficiency of turbine is

considered as a constraint [1]. Variable speed operation (VSO) of hydro turbine and generator offers

an attractive solution for improved efficiency at part-loads in addition with greater flexibility in power

delivery [2].

By Thanga Raj Chelliah, Senior Member IEEE,Officer-in-Charge, Hydropower Simulation Lab.

Laboratory Point of View

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[2] Anto Joseph, D. Karthik, R R Semwal, Thanga Raj Chelliah, and Deepak Khare, "Dynamic

Performance of Pumping Mode of 250 MW Variable Speed Hydro-Generating Unit

Subjected to Power and Control Circuit Faults", IEEE Trans. Energy Conversion, Vol. 33,

No.1, 2018.

References:

[3] Anto Joseph, S. Raghu, Thanga Raj Chelliah and S V Appa Sarma,“Starting and Braking of

a Large Variable Speed Hydro-Generating Unit Subjected to Converter and Sensor Faults”,

IEEE Trans. Industry Applications, Vol. 54, No.4, 2018.

Looking into the future, the technology for effective redundancy for DFIM fed large variable

speed PSP needs to be designed to make confirmative of VSO in hydropower systems. Otherwise,

it shall be negative among policymakers and/or project developers.

But it is noted that the probability of operational state of power converter without redundancy per

year is 96.10% or even less due to grid disturbances [3]. Therefore, the overall benefit of the DFIM

fed variable speed PSP is reduced due to the inadequate power converter and control circuit

redundancy.

[1] Anto Joseph and Thanga Raj Chelliah,"A Review of Power Electronic Converters for

Variable Speed Pumped Storage Plants: Configurations, Operational Challenges, and

Future scopes", IEEE Journal Of Emerging and Selected Topics In Power Electronics, vol.

6, no.1, 2018.

Contact Us:

† AICTE, New Delhi.

† CPRI Bangalore.

† CDAC Thiruvananthapuram.

The laboratory acknowledges the support provided by the following funding

agencies, industries and research collaborators:

† THDC India Limited.

† Ministry of Shipping, New Delhi.

† Science and Engineering Research Board, New Delhi.

† Ministry of Electronics and Information Technology, New Delhi.

† JSK Lab Instruments, Chennai.

† Indian Maritime University Visakhapatnam.

† OPAL-RT Technologies, India.

Indian Institute of Technology Roorkee

Department of Water Resources Development and Management

Dr. Thanga Raj Chelliah, Senior Member IEEE

Phone : +91-1332-285554, +91-9456593798 (mobile)

Officer-in-Charge, Hydropower Simulation Lab

Email : thangfwt@iitr.ac.in

Associate Professor of Hydro-Electric Systems &

@ IIT Roorkee

URL : http://www.iitr.ac.in/~WRT/thangfwt

Uttarakhand -247667 (India).

Acknowledgement