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ANNUAL REPORT2019
Hydropower Simulation LaboratoryDept. of Water Resources Development & Management
IIT ROORKEE
VAHADOOD HASANQIP Research Scholar
People
B. ANIL KUMAR Research Scholar
C. CARUNAISELVANEResearch Scholar
CHAMKAUR SINGH ADDISr. Tech. Superintendent
JAVED ALIResearch Scholar
VIDYASAGAR TUMMAKURIResearch Scholar
M. CHANDRASEKARSenior Research Fellow
Dr. K.K. PRABHAKARANPost Doctoral Fellow
NADIA TURKEY M.Tech Student
SUNNY SONANDKARJunior Research Fellow
D. KARTHIKSenior Research Fellow
RAGHU SELVARAJSenior Research Fellow
RUPESH KUMARIUGC - Junior Research Fellow
R.R. SEMWALResearch Scholar (Part Time)
TEMESGEN LORATOM.Tech Student
PROF. THANGA RAJ CHELLIAHOfficer - in - Charge
Hydropower Simulation Lab
SULEIMAN ALAWUDEENM.Tech Student
SUDIPTA RANJAN NAYAKM.Tech Student
Contents
Workshops Organized for Graduate Students & In-Service Engineers ....... 09
Research Publications................................................................................ 04
Awards and Recognitions............................................................................05
Faculty Development Programme .............................................................. 08
Internships Offered..................................................................................... 10
MoU Signed ................................................................................................12
Upcoming Event..........................................................................................14
Distinguished Visitors..................................................................................11
2018 Highlights........................................................................................... 15
Photo Gallery.............................................................................................. 18
Visits ........................................................................................................... 06
Technologies Developed.............................................................................13
Acknowledgment
R & D Meetings............................................................................................ 07
Research Projects.......................................................................................03
Short Article: Is Hydropower System Research Saturated?......................... 16
About the Laboratory................................................................................... 01
1
About the Laboratory
† Hydropower Simulation Laboratory (HSL) is a part of Dept. of Water Resources D evelopment
and Management, Indian Institute of Technology Roorkee. It aims to model and simulate
hydroelectric systems and to validate the developed models through laboratory prototype.
† 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
equipment, hydro-generators (both synchronous and asynchronous in large capacity), multi-
channel power electronic circuits for excitation and variable speed operation, grid interface, etc.
† To support the simulation study, the following additional facilities are developed.
1. Real time interface, through DS 1104 and DS 1202 MicroLabBox, of simulation tool with t he
prototype model of various generators used in hydropower plants.
2. Possible grid disturbances are created with the help of programmable AC power source and
analyze the performance of hydro-generating equipment.
† Collaborative/Sponsored Research: The laboratory is committed for the research in support
of national 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 Indian Maritime University
(Visakhapatnam) through a research project.
† 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).
† 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, a real time
simulator from Opal-RT Technologies is procured recently.
2
† C ourses 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.
l Create an industrial collaboration for hydropower real-time simulation.
l Development of power and control circuit redundancy for variable speed hydrogenerating
units.
† Targets/Goals in the next five years:
l Implementation of cyber physical system for hydro power plants to enhance its cyber
securities.
l Development of software solutions for renovation and modernization of Indian hydropower
plants.
3
Research Projects (2019)
Strand 1: Completed
Principal Investigator | Prof. Thanga Raj Chelliah
Ministry of Shipping, Govt. of India Topic | Doubly-Fed Induction Machine as a Propulsion Motor in Tugboats to Improve Fuel Efficiency
Strand 2: Ongoing Projects
Topic | Analysis and Mitigation of Active Power Oscillations in Hydro-Generators Fed High Voltage Transmission LinesPrincipal Investigator | Prof. Thanga Raj Chelliah
THDC India Limited
Principal Investigator | Prof. Thanga Raj Chelliah
Ministry of Shipping, Govt. of India Topic | Design and Experimental Validation of Battery Operated Short Endurance Vessels with Wireless Charging Circuit
Strand 3: Upcoming ProjectsNational Mission on Power Electronics Technology, IndiaTopic | Power-Hardware-In-Loop Simulation for 25 MW Power Electronic Converters Fed 250 MW Hydro-Generating Unit
Status | Accepted for fundingPrincipal Investigator | Prof. Thanga Raj Chelliah
Collaborator | IISc, IITB, NITT, IIEST Shibpur and CDAC-T
Topic | Design of Fault Tolerance and Reconfiguration Control for Megawatt Power Electronic Converters Fed Variable Speed Pumped Storage UnitsPrincipal Investigator | Prof. Thanga Raj Chelliah
Central Power Research Institute, Bangalore
4
Research Publications (2019)
Strand 1: Peer Reviewed Journals
† Anto Joseph, Thanga Raj Chelliah, and K-B Lee "Multi-Channel VSI Fed Large Variable Speed
Asynchronous Hydro-Condenser: Fault Analysis, Fault Diagnosis and Fault Tolerant Control,"
IET Renewable Power Generation, Vol. 13, No. 3, pp. 438 – 450,Feb. 2019.
† K. Desingu, R. Selvaraj, and T. R. Chelliah, “Control of Reactive Power for Stabilized Junction
Temperature in Power Electronic Devices Serving to a 250-MW Asynchronous
Hydrogenerating Unit,” , vol. 55, no. 6, pp. IEEE Transactions on Industry Applications
7854–7867, Nov. 2019.
† R. R. Semwal, R. Selvaraj, K. Desingu, T. R. Chelliah, and A. Joseph, “Two-Stage Protection
Circuit for a Multichanneled Power Electronic Converter Fed Large Asynchronous
Hydrogenerating Unit,” , vol. 55, no. 6, pp. IEEE Transactions on Industry Applications
5947–5959, Nov. 2019.
† K. Desingu, R. Selvaraj, T. R. Chelliah, and D. Khare, "Effective Utilization of Parallel-
Connected Megawatt Three-Level Back-to-Back Power Converters in Variable Speed Pumped
Storage Units," , vol. 55, no. 6, pp. 6414-6426, Dec. IEEE Transactions on Industry Applications
2019.
† C. Carunaiselvane, Thanga Raj Chelliah, and Deepak Khare, “Analysis on Thermal Behaviour
of Large Hydro-Generators Operating with Continuous Overloads,” IEEE Transactions on
Industry Applications, 2019 (early access), DOI:10.1109/TIA. 2019.2958782.
† B. A. Kumar, R. Selvaraj, T. R. Chelliah, and U. S. Ramesh, “Improved Fuel-Use Efficiency in
Diesel–Electric Tugboats With an Asynchronous Power Generating Unit,” IEEE Transactions on
Transportation Electrification, vol. 5, no. 2, pp. 565–578, Jun. 2019.
† A. Joseph, T. R. Chelliah, R. Selvaraj, and K-B Lee, “Fault Diagnosis and Fault-Tolerant Control
of Megawatt Power Electronic Converter-Fed Large-Rated Asynchronous Hydrogenerator,”
IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 7, no. 4, pp.
2403–2416, Dec. 2019.
† R. Kumari, K. Desingu, T. R. Chelliah, and S. V. A. Sarma, "Development Trends and Future thProspects of Hydro-Turbine Control Systems," in Proc. 54 IEEE Industry Applications Society
Annual Meeting, Baltimore, USA, 2019.
Strand 2: International Conference Proceedings
5
Awards and Recognitions (2019)
IIT Roorkee
Mr. Raghu Selvaraj, Research Scholar of the laboratory, has been
selected to be a recipient of APEC Student Travel Support to thattend the 35 Annual IEEE Applied Power Electronics
Conference & Exposition (APEC 2020) to be held at New Orleans (USA) during March 15 -19, 2020.
The support is provided jointly by the Power Sources Manufacturers Association, the IEEE Power
Electronics Society and the IEEE Industry Applications Society.
Mr. Raghu Selvaraj & Mr. Karthik Desingu, Research Scholars of Hydropower
Simulation Laboratory received a P2P (project to product) project entitled “Design and
Implementation of Quasi G-Source m-Inverter for plug and play PV module” from the
Design Innovation Center, IIT Roorkee.
Prof. Thanga Raj Chelliah, Officer-in-Charge of the laboratory, received the Institute
Research Fellowship for outstanding Young Faculty Award 2018 at IIT Roorkee. He
is conducting research on power electronic converters and their applications in large
rated hydro generators of synchronous and asynchronous types. Duration of this
fellowship is three years i.e. July 2019 – June 2022.
Prof. Thanga Raj Chelliah was nominated by AICTE as a judge for Smart India Hackathon 2019
(Hardware Edition) held at IIT Roorkee during 9-12 July 2019. He was also served as a judge at the
event "DIC Terrace Farming" held during Inter IIT Tech Meet 8.0 (conducted by IIT Roorkee from 20-22
December 2019).
Mr. C. Carunaiselvane, Research Scholar of the
laboratory, was a winner of Industry Day 2019 poster
awards. He presented his research findings entitled
“Negative Sequence Current Capability of Large Rated
Salient Pole Hydro Generators”. The event was
organized by the Dept. of Water Resources Development thand Management, IIT Roorkee on 12 November 2019.
6
Visits (2019)
Mr. Javed Ali (Research Scholar) and Mr. Sudipta Nayak (M.Tech student), visited 1000 MW Tehri
Hydropower Plant during 18-19 July 2019. They had technical discussions with in-service engineers
who are handling the operations of electrical & mechanical equipment. These scholars conduct
research on electromagnetically induced vibrations in asynchronous hydro generators.
Mr. Vidyasagar Tummakuri, Research Scholar of the laboratory, visited
Indian Maritime University, Visakhapatnam (IMU-V) during 9-26
September 2019. IMU-V is a collaborator of Hydropower Simulation
Laboratory for a research project funded by the Ministry of Shipping
(New Delhi). He has explored several marine vessels at Visakhapatnam
port to estimate the degree of possibility concerning complete marine
electric propulsion.
Prof. Deepak Khare, Prof. Gopal Chauhan (superannuated from
the Dept. of WRD&M) and Prof. Thanga Raj Chelliah visited
Karcham Wangtoo (1000 MW) and Baspa (300 MW) Hydro-Electric
Stations during 20-22 April 2019 for technical discussions with
project authorities on sedimentation issues and overloading of
generating units.
Mr. Raghu Selvaraj & Mr. Karthik Desingu and Mr.
Sunny Sonandkar attended the Renewable
Energy India Expo. (REIE) held in New Delhi on th20 September 2019. REIE covered solar, wind,
biomass energy systems, energy storage and
mobility.
7
R & D Meetings Attended (2019)
Prof. Thanga Raj Chelliah attended the meeting of R & D Committee on Hydro thResearch held in Central Power Research Institute (Banglore) on 27 February
2019 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”. In addition, he visited Power Systems
Laboratory of CPRI. The proposal was accepted by the committee for funding.
Prof. Thanga Raj Chelliah attended R & D meeting held in THDC India Limited th(THDCIL) on 18 July 2019 and presented a revised research project proposal
on “Analysis and Mitigation of Active Power Oscillations in Hydro Generator
fed High Voltage Transmission Lines”. The proposal was accepted by the R&D
Apex Committee of THDCIL for funding.
Mr. Raghu Selvaraj & Mr. Karthik Desingu, Research Scholar
of the laboratory, presented their research findings entitled
“Design and Implementation of Quasi G - Source m - Inverter
for Plug and Play PV Module” at the Design Innovation center th(DIC) on 9 March 2019 .
8
A field visit to Pathri Power House (Haridwar) was
arranged under the guidance of Prof. Thanga Raj
Chelliah and Shri G. P. S. Bhati, Rtd. Executive
Engineer, UP Irrigation. The main aim of the visit was
to explore the operations of thyristors based static
excitation systems in hydro generating units.
Redundancy (two automatic and one manual
channels) in control circuit provided for static
excitation was demonstrated by an in-service
engineer of the power station. Haridwar barrage was also covered during the trip.
Faculty Development Programme (2019)
A five-day short term course on “Simulation of Power Electronic Converters Serving to Hydropower
Plants” was organized jointly by the Power Electronics & Hydro-Electric Machines and Hydropower
Simulation Laboratories during May 20–24, 2019. The course was coordinated by
Prof. Thanga Raj Chelliah and Prof. Deepak Khare of IIT Roorkee with the financial support of TEQIP-
III. Prof. N. P. Padhy, Dean of Academic Affairs, IIT Roorkee was the Chief Guest for Inaugural
function.
The course was structured in consideration of following objectives:
1. Explore the power electronic technologies to use as an efficient interface in hydropower
generation.
2. Simulate the various configurations of power electronic converters serving to hydropower plants
including:
- AC-DC converters (for field excitation in synchronous hydro generators)
- AC-DC-AC converters (for mini/micro
hydro with grid operation)
- Multi-level Inverters
- Thermal loading on power converters
3. Discussion on grid interfacing devices.
4. Explore power quality solutions to this
application.
- AC-AC converters (back-to-back voltage
source converters) for active and reactive
power control in asynchronous hydro
generators
9
Workshops Organized for Graduate Students & In-Service Engineers (2019)
For more details of the project: https://www.iitr.ac.in/media/facspace/thangfwt/CPRI.pdf
For more details of the project: https://www.iitr.ac.in/media/facspace/thangfwt/MOS.pdf
Demonstration of experimental set-up used for the project "Reduction of Switching Transients in
Doubly Fed Induction Machines used in Large Rated Pumped Storage Plants", funded by CPRI,
Bangalore.
thDay-3 (10 May 2019, Friday, 3:00 - 6:00 pm):
A lecture on "Power Electronics Applications in Hydro" was delivered by Prof. Thanga Raj Chelliah
before demonstrating these laboratory setups. Ph.D students working in different departments of IIT
Roorkee and in-service engineers of Uttarakhand Jal Vidyut Nigam Limited were attended these
training workshops.
Demonstration of experimental set-up used for the project "Doubly Fed Induction Machine as a
Propulsion Motor in Tugboats to Improve Fuel Efficiency", funded by the Ministry of Shipping, New
Delhi.
Demonstration of experimental set-up used for the project "Analysis of dynamic performance of
variable speed hydroelectric plants subjected to power and control circuit faults", funded by THDC
India Limited, Rishikesh.
thDay-1 (8 May 2019, Wednesday, 3:00 - 6:00 pm):
For more details of the project: https://www.iitr.ac.in/media/facspace/thangfwt/THDC.pdf
thDay-2 (9 May 2019, Thursday, 3:00 - 6:00 pm):
Upon successful completion of following research projects, Hydropower Simulation Lab. organized
training workshops for graduate students and in-service engineers during 8-10 May 2019. This
activity was a component of each project as approved by funding agencies.
10
Internships Offered (2019)
Ms. K. Gayathri, Research Scholar, Pondicherry Engineering
College (an Autonomous Institution under Govt. of
Pondicherry), visited the laboratory during 9–22 October 2019
for a short-term research on Doubly-Fed Induction Generator.
Mr. Shubham Singh from the Department of Mechanical
Engineering, Zakir Husain College of Engineering and
Technology, Aligarh Muslim University worked in the laboratory
as an intern in SPARK 2019 program. He worked with the CAD
modeling of two different marine vessels.
Prof. C. Bharatiraja, INDO-US BASE Fellow (2018), from SRM Institute of Science and Technology,
Chennai visited the laboratory during 12–21 May 2019 under Young Scientists Fellowship Scheme
(YSFS) supported by Tamil Nadu State Council for Science and Technology. He conducted a short
term research in power electronic converters serving to asynchronous machine drives under the
mentorship of Prof. Thanga Raj Chelliah.
Mr. Subhram Subhrajyoti Rana from the Department of Mechanical Engineering, IIT Roorkee worked
in the laboratory as an intern in SPARK 2019 program. He worked with optimization of propeller
parameters and speed to make the propulsion system more efficient by selecting proper reduction
ratio which results in minimum power consumption. His work got good attention from industry experts.
11
Distinguished Visitors (2019)
Shri S. V. Appa Sarma, Consultant to THDC India stLimited, visited the laboratory on 31 October 2019.
Cyber security on hydro plant control systems and
DC current capability of power transformers were
discussed. Negative sequence current capability of
salient pole synchronous generator was also
discussed.
Shri M. K. Garg, Additional General Manager th(BHEL, Haridwar), visited the laboratory on 15
October 2019. Issues on integration of solar power
systems were discussed. Benefits of variable speed
hydro-turbines were also discussed during the
meeting.
12
An MoU was signed between Hydropower Simulation
Laboratory and Central Power Research Institute (CPRI), thBangalore on 13 May 2019 for a research project entitled
“Design of Fault Tolerance and Reconfiguration Control for
Megawatt Power Electronic Converters Fed Variable Speed
Pumped Storage Units” funded by CPRI. It was signed by
Prof. Thanga Raj Chelliah and Shri B. Sridhar, Chief
Administrative Officer, CPRI. The project aims to investigate
power switch faults associated with the rotor excitation
system of a 250 MW hydro unit to be commissioned in Tehri
pumped storage plant.
MoU Signed (2019)
A Memorandum of Understanding (MoU) was signed
between Hydropower Simulation Lab. and THDC thIndia Limited (THDCIL) on 12 November 2019 for a
research project “Analysis and Mitigation of Active
Power Oscillations in Hydro-Generators Fed High
Voltage Transmission Lines” funded by THDCIL. It
was signed by Prof. Thanga Raj Chelliah from
WRD&M Dept. (IIT Roorkee) and Shri L. P. Joshi,
General Manager (Electrical and Mechanical Design)
from THDC India Limited. The aim of the project is to
find the reasons for oscillations occurred at Tehri and Koteshwar generating equipment during power
evacuation under contingency conditions and to recommend possible solutions for damping out the
oscillation.
A Memorandum of Understanding (MoU) was signed
between Hydropower Simulation Lab. and THDC thIndia Limited (THDCIL) on 12 November 2019 for a
research project “Analysis and Mitigation of Active
Power Oscillations in Hydro-Generators Fed High
Voltage Transmission Lines” funded by THDCIL. It
was signed by Prof. Thanga Raj Chelliah from
WRD&M Dept. (IIT Roorkee) and Shri L. P. Joshi,
General Manager (Electrical and Mechanical Design)
from THDC India Limited. The aim of the project is to
find the reasons for oscillations occurred at Tehri and Koteshwar generating equipment during power
evacuation under contingency conditions and to recommend possible solutions for damping out the
oscillation.
13
Technologies Developed (2019)
System and Method for Energy Efficient Starting of Pump Turbine Equipped with Doubly
Fed Induction Machine
Name of Invention:
This invention relates to provide a system and method for an effective energy loss reduction to the
DFIM based system during starting in variable speed pumped storage units. Energy consumption of
the machine is reduced by reducing reactive power consumption.
Patent status : Under process.
Name of Invention:Design and Implementation of Quasi G- Source m - Inverter for Plug and Play PV Module
thPatent status : Filed (Application Number : 201911019294, 15 May 2019) .
This invention relates to generate clean and efficient electric power generation with the help of plug
and play PV modules to meet household electric load demand. In this context, the primary objectives
are: (i) design of plug and play PV module arrangement in view of easily shiftable option, (ii) design
and implementation of quasi G- source µ- inverter for each PV module to obtain maximum efficiency.
14
Upcoming Event
More details of the course shall be seen at https://www.hydropower.iitr.ac.in/amps2020
A 3-day course on Applications of Multi-Megawatt Power-Electronic
Systems (AMPS) is scheduled to be organized by the laboratory
during April 2–4, 2020 at the Dept. of Water Resources Development
and Management (IIT Roorkee). Main objective of the course is to discuss the applications of multi-
megawatt power electronic converters in large pumped storage hydropower plants among graduate
and post graduate students, young teachers and in-service engineers of hydropower companies.
Operational challenges on such converters and research scopes are also discussed through
simulation and experiments. It is expected to receive large number of participants from leading
industries in the field including ABB India Ltd., CDAC Thiruvananthapuram, CSIR-CECRI, GE India,
BHEL, THDC India Limited, Karnataka Power Transmission Corporation Ltd., ALSTOM, dSPACE and
OPAL-RT Technologies in addition with the participants from academic and research institutions.
th(To be functional from 15 Jan 2020)
Principal Sponsor:
Co-Sponsor:
Co-Sponsors (probable):
15
2018 Highlights
Research Publications: Seven research papers in IEEE Transactions/Journals and nine in reputed
IEEE Conference Proceedings were published in 2018.
Distinguished Visitors: Policymakers from the Central Electricity Authority and Jindal Energy limited
were visited the laboratory.
Internship Offered: One from NIT Trichy under SPARK 2018 program.
Research Projects: Two projects in the field of variable speed pumped storage were completed in
2018 with the financial support of THDC India Ltd. and Central Power Research Institute, Bangalore.
Faculty Development programme: One, funded by QIP (AICTE).
For more information, please see 2018 Annual Report of lab. available at :
International Visits: Laboratory members had attended/visited conferences/laboratories in USA,
Austria, and Japan.
https://www.iitr.ac.in/media/facspace/thangfwt/HSL2018.pdf
Financial/Technical supporters to the laboratory during the year 2018:
Awards: Two travel grants received by the member of the lab from CSIR (India) for attending IEEE IAS
Annual meeting 2018 and Viennahydro 2018 conference.
16
Is Hydropower Systems Research Saturated?
Hydropower system is considered to be a mature technology if it consists of fixed speed turbines and
generators (synchronous machines), simple rectifier ( ) based excitation, well established AC-DC
hydraulic structures, mechanical components and their control systems. This system is confined to
single input (speed/frequency) and single output (gate opening) control, which is enough for a
generator operating independently at constant head and driven by a Francis type turbine having fixed
blade angle But the hydropower system is not yet matured if it consists of variable speed turbines and .
generators (asynchronous machines), multi megawatt voltage source power electronic converters for -
(AC-DC-AC) frequency control. Fixed speed hydro system has a decoupled control structure for
turbine (frequency or real power) and generator excitation (voltage or reactive power) but the later one
needs coupled control structure i.e. coordinated control system for hydraulic governor and generator
excitation for providing: (i) higher energy efficiency at wide variation in water head, and (ii) fast
response ancillary services to the grid. In fixed speed hydro, hydraulic turbine control system is
responsible for delivering active power, whereas in variable speed hydro both generator excitation
(rotor circuit) and turbine control systems are responsible. An operational issue associated with the
excitation circuit of variable speed hydro unit i.e. redundancy is under consideration of power
engineering community for research. It is noted that redundancy in excitation circuit of large hydro unit
is mandatory in Indian power stations as regulated by the Central Electricity Authority (CEA), India.
Multi-Stage Protection for Power Converters: From a study conducted by CEA, it was observed that
there were 73 voltage sag events occurred in Indian grid during the year 2016-17. Among them, 10
cases were reported in 400kV transmission lines. Crowbar protection circuit connected in the rotor
circuit of generator is responsible to protect rotor windings and converters from over-voltages during
grid disturbances. It is noted that the generator and excitation circuits receive trip signals when
crowbar circuit is activated and the generating unit is isolated from the grid within 150ms. Multi-stage
protection helps to increase the continuity of operation of generators during less severe faults.
Starting of Pump-Turbine : Starting of small-and-medium-rated asynchronous machines during
motoring mode is well known. However, starting and braking of large rated (e.g., 250 MW)
asynchronous hydro-electric machines with multi-level voltage source converters need further
research in view of energy efficient starting, reduction of start-up transients, and ease of mode-
changeovers. Time required for smooth starting and braking should be known for better management
of grid operations. It is noted that doubly-fed induction (asynchronous) machine has more inertia than
synchronous machine with same power rating due to bigger size of rotor.
Based on the experience gained from the research and consultancy projects investigated in
Hydropower Simulation Laboratory (WRD&M Dept., IIT Roorkee), the following key issues in
hydropower systems are identified for further research in the laboratory.
By Thanga Raj Chelliah, Senior Member IEEE,Officer-in-Charge, Hydropower Simulation Lab.
Laboratory Point of View
17
Fault Tolerance and/or Fault Reconfiguration: Among the various equipment associated with large
rated hydro generating unit power converter's reliability should be ensured for continuous operation.
Failure of converters in large rated variable speed hydro units may cause serious concern in grid
stability. Since full redundancy is not yet developed for the excitation circuit of variable speed hydro
units fault tolerance and fault reconfiguration control shall receive more attention among project
developers/authorities of such type of hydro projects.
Suggestions for Further Reading:
[2] R. R. Semwal, R. Selvaraj, K. Desingu, T. R. Chelliah, and A. Joseph, “Two-Stage Protection Circuit for a
Multichanneled Power Electronic Converter Fed Large Asynchronous Hydrogenerating Unit,” IEEE Transactions on
Industry Applications, vol. 55, no. 6, pp. 5947–5959, Nov. 2019.
[4] A. Joseph, R. Selvaraj, T. R. Chelliah, and S. V. A. Sarma, "Starting and Braking of a Large Variable Speed
Hydrogenerating Unit Subjected to Converter and Sensor Faults," IEEE Transactions on Industry Applications, vol. 54,
no. 4, pp. 3372-3382, Aug. 2018.
[5] R. R. Singh, R. Selvaraj, H. Mohan, and T. R. Chelliah, "Dynamic Performance of Doubly Fed Hydroelectric Machines
Under Voltage Unbalance—A Relative Electrothermomechanical Analysis," IEEE Transactions on Industry
Applications, vol. 54, no. 5, pp. 4156-4166, Oct. 2018.
Converter Efficiency and Reliability: As discussed earlier, large rated variable speed hydro units need
multiple megawatt power electronic converters for meeting large amount of excitation current for
generators (e.g., 12 kA in Tehri pumped storage units). Effective utilization of power converters in
accordance with the variation in water head and targeted power delivery shall improve the lifespan and
efficiency of conversion systems.
[3] K. Desingu, R. Selvaraj, T. R. Chelliah, and D. Khare, "Effective Utilization of Parallel-Connected Megawatt Three-
Level Back-to-Back Power Converters in Variable Speed Pumped Storage Units," IEEE Transactions on Industry
Applications, vol. 55, no. 6, pp. 6414-6426, Dec. 2019.
[6] R. Selvaraj, K. Desingu, T. R. Chelliah, D. 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 Transactions on
Industry Applications, vol. 54, no. 5, pp. 5429-5443, Oct. 2018
In view of above, it is concluded that the research on hydropower systems is not yet atur ed. s at
Hydropower Simulation Lab. invites fellow researchers, funding agencies, hydropower project
developers for carrying out collaborative research in the identified areas.
[1] K. Desingu, R. Selvaraj, and T. R. Chelliah, “Control of Reactive Power for Stabilized Junction Temperature in Power
Electronic Devices Serving to a 250-MW Asynchronous Hydrogenerating Unit,” IEEE Transactions on Industry
Applications, vol. 55, no. 6, pp. 7854–7867, Nov. 2019.
Cyber Security in Hydro Plant Control Systems: Hydropower plant control systems (unit control
boards) need to be reinvestigated, to make them free from cyber attack, in view of increased cyber-
attacks on process controllers and measures suggested in recently released IEC Standard 62433
(2019): Security for Industrial Automation and Control Systems and also in view of the Central
Electricity Regulatory Commission's approval for automatic generation control pilot project to be run
jointly by Power System Operation Corporation Limited, National Load Dispatch Centre and National
Thermal Power Corporation's Dadri Stage-II thermal power plant.
18
Industry-Academia Meet during NWPE 2017 Visit of Sr. Vice President (Hydro), Jindal Energy
Technical Discussion in Karcham-Wangtoo HEP Visit of Member (Planning), CEA
Field Trip to Pathri Power House Participants of WRDM Industry Day 2019
Photo Gallery
Contact Us:
† CPRI Bangalore
† Ministry of Shipping, New Delhi
† CDAC Thiruvananthapuram
† THDC India Limited
† Indian Maritime University Visakhapatnam
† Science and Engineering Research Board, New Delhi
The laboratory acknowledges the support provided by the following funding
agencies, industries and research collaborators:
† JSK Lab Instruments, Chennai
† Ministry of Electronics and Information Technology, New Delhi
† AICTE, New Delhi
† GE Power India Limited
† OPAL-RT Technologies, India
Department of Water Resources Development and Management
Uttarakhand -247667 (India).
© IIT Roorkee
Indian Institute of Technology Roorkee
Officer-in-Charge, Hydropower Simulation Lab
Associate Professor of Hydro-Electric Systems &
Dr. Thanga Raj Chelliah, Senior Member IEEE
Acknowledgement
Email : [email protected], [email protected]
Phone : +91-1332-285554, +91-9456593798 (mobile)
URL : http://www.iitr.ac.in/~WRT/thangfwt
