“I had the opportunity to work with Hesam in my final 2 years of studies at Western University. He was a Teaching Assistant (TA) for two Power System courses I took, as well as for my final Fourth Year Engineering Capstone Project. Hesam was a wonderful TA. He would explain concepts clearly and concisely, which really helped in understanding the material and applications for the laboratories/work we did. Going further beyond just what we learned in class, Hesam would always try to bring in his knowledge from his work experiences, more advance courses, and industry into whatever he taught us. He would present all this information in a way that helped us understand how everything we learned (theories and all) fit together in the real world. As young Engineering students, having this insight into real world applications of our learning was crucial to our development. I can say without a doubt that his teaching introduced me to further applications of Distributed Generation in the Power Systems industry, and this interest led me to pursue my Fourth Year Engineering Capstone Project in this field. I was also fortunate that Hesam agreed to mentor and assist me during this project, and I learned a lot from that experience with him as well. All in all, I think Hesam was a great TA (and friend!), not just for his vast knowledge in Power Systems, but also because of his friendly personality, approachable nature, and willingness to help others. I wish Hesam the best in whatever opportunities await for him after completion of his PhD, and I am sure he will succeed at whatever opportunity that may be.”
About
I lead the software development and automation for IBRs interconnection studies. I also lead the technical discussion among utility, OEMs, vendors, and consultants. I worked on a variety of large-scale projects in several countries, for which I have developed network models using the most advanced simulation software including PSS/E, DIgSILENT, PSCAD, TSAT, ETAP, CYME, RTDS/RSCAD, and have conducted complex analyses for both HVAC and HVDC systems which involved transient and dynamic stability, small signal stability analysis, and the application of FACTS devices (STATCOM) for stability improvement. In this latter field, Mr. Maleki holds a Ph.D. degree.
Some of Mr. Maleki's notable work has been the tuning and upgrade of controllers for large-scale power plants including a 1200 MW hydropower plant using a Power System Stabilizer (PSS); the analysis of a 200 MW wind farm Low Voltage Ride Through (LVRT) capability; and also the determination of power ramp in an HVDC system. He has also performed various Electro-Magnetic Transient (EMT) studies for breaker switching Transient Recovery Voltage (TRV), analysis of transformer energization inrush current, as well as lightning studies for transmission and traction systems.
➢ Over 9 years of hands-on experience in the design and validation of FACTS and HVDC power systems
➢ Proven track record in engineering consulting for over 10 GW of renewable energy interconnection
➢ Comprehensive knowledge of power system studies for wind and solar energy applications
➢ Solid work, education, and research background in voltage, transient, and frequency stability.
➢ Proven track record of designing FACTS controllers for various applications.
➢ Deep understanding of the energy market,
➢ Vast knowledge of utility interconnection requirements including ERCOT, PJM, AEMO, etc.
➢ Exceptional hands-on experience in developing and simulating control strategies for wind, solar, and BESS applications in PSCAD, PSSE, RSCAD, and Matlab Simulink.
➢ Proficient in power system design and analysis, including power system modeling and hardware
in loop applications.
➢ Proven track record of writing and securing grants and technical reports with the ability to manage
multiple projects and tasks simultaneously.
➢ Exceptional management and leadership skills and ability to work well within cross-functional
research groups.
➢ Proficiency in: •PSCAD •ETAP •PSS®E •RTDS •DigSILENT •Python •Matlab •CYME •Simulink
Activity
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As we continue to work closely with our members and stakeholders to keep the lights on for the 65 million people we serve, the teamwork…
As we continue to work closely with our members and stakeholders to keep the lights on for the 65 million people we serve, the teamwork…
Liked by Sam Maleki, Ph.D. , P.Eng.
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Please register to join us in person or virtual for our October 15th meeting with IEEE PES Distinguished Lecturer John McDonald! It will be…
Please register to join us in person or virtual for our October 15th meeting with IEEE PES Distinguished Lecturer John McDonald! It will be…
Liked by Sam Maleki, Ph.D. , P.Eng.
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Join EPE's VP of Technical Services & Compliance, Billy Yancey, and VP of Sales & Business Development, Christopher Wienbeck, for an informative…
Join EPE's VP of Technical Services & Compliance, Billy Yancey, and VP of Sales & Business Development, Christopher Wienbeck, for an informative…
Liked by Sam Maleki, Ph.D. , P.Eng.
Experience
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Education
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Publications
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Utility-Based Grid Forming Inverters Applications: Seamless Transition and Power Oscillation Damping
IEEE
Utility-based Grid Forming Inverters (GFMs) are gaining immense popularity as penetration of inverter-based resources (IBRs) are reaching all-time high levels. One of the main advantages of these inverters is their ability to operate in both grid-connected and islanded modes of operation. GFMs need to have a smooth transition between the different modes of operation to maintain synchronism during the transition and establish a stiff voltage source when in islanded or locked frequency mode. This…
Utility-based Grid Forming Inverters (GFMs) are gaining immense popularity as penetration of inverter-based resources (IBRs) are reaching all-time high levels. One of the main advantages of these inverters is their ability to operate in both grid-connected and islanded modes of operation. GFMs need to have a smooth transition between the different modes of operation to maintain synchronism during the transition and establish a stiff voltage source when in islanded or locked frequency mode. This paper presents a synchronization control technique based on smoothing the change in angle when the GFM transitions between modes of operation. Furthermore, a Power Oscillation Damper (POD) was designed as an auxiliary control of the GFM to damp electromechanical oscillations when operating in grid-connected mode. The proposed GFM model is interconnected to the modified IEEE 12-bus system, and simulation results demonstrate the effectiveness of the proposed control.
Other authors -
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Comprehensive Studies on Controller Tuning for PSS2B and PSS4B: Challenges, and Straightforward Tuning Approach
CIGRE Canada
See publicationPower System Stabilizers (PSSs) are key power system components that are employed in power systems
to damp low-frequency power oscillations. Various PSS models have been developed, each having
certain features and design challenges. PSS2B and PSS4B are two controllers with unique features and
capabilities. PSS4B retains most of the good features of the PSS2B while improving the performance of
the controller; however, this comes with increased challenges in the controller design.…Power System Stabilizers (PSSs) are key power system components that are employed in power systems
to damp low-frequency power oscillations. Various PSS models have been developed, each having
certain features and design challenges. PSS2B and PSS4B are two controllers with unique features and
capabilities. PSS4B retains most of the good features of the PSS2B while improving the performance of
the controller; however, this comes with increased challenges in the controller design. This paper
investigates and studies controller tuning of these two PSS types, based on real data from
a transmission power system of a Hatch client (Confidential), and proposes a straightforward approach
for the tuning of PSS4B. The parameters of PSS4B have been tuned to mimic the response of the PSS2B.
The results are compared using the two-area power system test cases to show the performance of the
designed controller. The parameters are then implemented in the PSS/E software into the real power
system model, which show a very close performance and consistency for both controllers. -
A Novel Placement Technique for Utility-Scale PV Solar Farm Grid Integration
CIGRE
In this paper, the impact of real power injection from PV systems on power system stability is investigated. A novel technique based on residue analysis is proposed to investigate the site(s) where real power injection of the PV system has the lowest adverse impact on power system stability. This technique is further expanded to provide a long-term grid integration plan for multiple large-scale renewable energy resources. This novel placement technique is proposed not only to increase the grid…
In this paper, the impact of real power injection from PV systems on power system stability is investigated. A novel technique based on residue analysis is proposed to investigate the site(s) where real power injection of the PV system has the lowest adverse impact on power system stability. This technique is further expanded to provide a long-term grid integration plan for multiple large-scale renewable energy resources. This novel placement technique is proposed not only to increase the grid penetration capability, but also to maintain its stability through proper PV integration placement. Furthermore, one of the challenges in stability studies is the level of similarity between the small-signal and transient simulations. To overcome this concern, the 12-bus FACTS power network is used as the case study system. The 12-bus FACTS network is large enough to demonstrate different electromechanical oscillation modes and is yet small enough to be fully realizable in an EMT-type simulation. To evaluate the performance of the proposed technique, the interconnection of various large-scale PV solar farms to the 12-bus FACTS network is analyzed. Matlab/Simulink and PSCAD/EMTDC software are used to study the small-signal and transient stability impacts. To justify the performance of EMT and small-signal studies, the generator speed variation subject to small disturbances is compared. Both small-signal and transient studies confirm that the proposed placement technique can significantly enhance the grid’s capability for PV penetration. A mechanism is also proposed to simplify the application of the proposed technique towards future renewable energy development.
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PV Solar System Control as STATCOM (PV-STATCOM) for Power Oscillation Damping
IEEE Transaction on Sustainable Energy
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Novel Night and Day Control of a PV Solar System as a STATCOM (PV-STATCOM) for Damping of Power Oscillations
University of Western Ontario
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Coordinated control of PV solar system as STATCOM (PV-STATCOM) and Power System Stabilizers for power oscillation damping
IEEE
This paper presents a novel control of PV solar farm as a STATCOM (PV-STATCOM) coordinated with Power System Stabilizers (PSSs) for damping of electromechanical oscillations in a power system. A two-area power system with a 150 MW PV solar plant connected at the midpoint of the tie line is simulated in PSCAD/EMTDC software. During contingencies, the capacity of the PV inverter remaining after real power generation is utilized for dynamic reactive power exchange to accomplish power oscillation…
This paper presents a novel control of PV solar farm as a STATCOM (PV-STATCOM) coordinated with Power System Stabilizers (PSSs) for damping of electromechanical oscillations in a power system. A two-area power system with a 150 MW PV solar plant connected at the midpoint of the tie line is simulated in PSCAD/EMTDC software. During contingencies, the capacity of the PV inverter remaining after real power generation is utilized for dynamic reactive power exchange to accomplish power oscillation damping. The advantage of master-slave feature in PSCAD/EMTDC software is utilized for performing the optimization and controller coordination. It is demonstrated that a coordinated control of PV-STATCOM and PSS can effectively enhance the damping of power oscillations, leading to higher power transfers in lines. This novel control of PV solar farms will result in a more optimal utilization of the expensive PV system asset for grid stabilization and enhancement of power transmission capability
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PV-STATCOM: A Novel Smart Inverter for Transmission and Distribution System Applications
7th International Conference on Integration of Renewable and Distributed Energy Resources”, Niagara Falls, Canada, Oct. 24-28, 2016
Other authors -
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Increase in fault ride through capability of direct drive permanent magnet based wind farm using VSC-HVDC
IOP science
Burning of fossil fuels and green house gasses causes global warming. This has led to governments to explore the use of green energies instead of fossil fuels. The availability of wind has made wind technology a viable alternative for generating electrical power. Hence, many parts of the world, especially Europe are experiencing a growth in wind farms. However, by increasing the number of wind farms connected to the grid, power quality and voltage stability of grid becomes a matter of concern…
Burning of fossil fuels and green house gasses causes global warming. This has led to governments to explore the use of green energies instead of fossil fuels. The availability of wind has made wind technology a viable alternative for generating electrical power. Hence, many parts of the world, especially Europe are experiencing a growth in wind farms. However, by increasing the number of wind farms connected to the grid, power quality and voltage stability of grid becomes a matter of concern. In this paper, VSC-HVDC control strategy which enables the wind farm to ride-through faults and regulate voltage for fault types is proposed. The results show that the wind turbine output voltage fulfills the E.ON grid code requirements, when subjected to three phase to ground fault. Hence, continues operation of the wind farm is achieved.
Other authors -
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Voltage variation due to solar photovoltaic in distribution network
IOP science
Grid integration of solar photovoltaic (PV) plant offers reduction in greenhouse emissions and independence from fossil fuels for power generation. The integration of such forms of power generation also brings with it a variety of policy and technical issues. One of the technical issues is the variation in grid voltages in the presence of solar photovoltaic (PV) plant, resulting in degradation of power quality. In this paper, the application of a dq current controller to limit the voltage…
Grid integration of solar photovoltaic (PV) plant offers reduction in greenhouse emissions and independence from fossil fuels for power generation. The integration of such forms of power generation also brings with it a variety of policy and technical issues. One of the technical issues is the variation in grid voltages in the presence of solar photovoltaic (PV) plant, resulting in degradation of power quality. In this paper, the application of a dq current controller to limit the voltage variation at the point of common coupling (PCC) due to a 2 MW solar photovoltaic (PV) plant will be discussed. The controller's goal is to ensure that the voltage variation meets the momentary voltage change limits specified in TNB's Technical Guidebook for the connection of distributed generation. The proposed dq current controller is shown to be able to limit the voltage variation.
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Bibliography of FACTS 2013-2014: IEEE Working Group Report
IEEE
This paper presents the Bibliography of FACTS technology for 2013-2014. It provides a listing of various journal and conference papers in this area. This Bibliography includes papers published in the latter part of 2013 and those published until November 2014.
Other authors -
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Bibliography of HVDC Transmission 2013-14 IEEE Working Group Report
IEEE
This paper presents the Bibliography of HVDC technology for 2013-2014. It provides a listing of various journal in this area. This Bibliography includes papers published in the latter part of 2013 and those published until November 2014.
Other authors -
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Comparative study for improving damping oscillation of SMIB system with STATCOM and BESS using remote and local signa
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This paper presents a comparison of the performance of a STATCOM and Battery Energy Storage System (BESS) in damping the inertial mode oscillations of a synchronous generator in a Single Machine Infinite Bus (SMIB) system. The effectiveness of remote control signal over local control signal is also examined. A damping controller is developed for both the STATCOM and Battery Energy Storage System (BESS) utilizing rotor speed deviation of the remotely located synchronous generator. The…
This paper presents a comparison of the performance of a STATCOM and Battery Energy Storage System (BESS) in damping the inertial mode oscillations of a synchronous generator in a Single Machine Infinite Bus (SMIB) system. The effectiveness of remote control signal over local control signal is also examined. A damping controller is developed for both the STATCOM and Battery Energy Storage System (BESS) utilizing rotor speed deviation of the remotely located synchronous generator. The performance of real power damping controller for BESS is compared with reactive power controller of a STATCOM. The effect of size of the BESS on damping the electromechanical oscillations of the generators is further investigated using EMTDC/PSCAD software.
Other authors -
Courses
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Advanced Engineering Mathematics
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Alternative Energy Sources for Electricity Generation
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Computer-Based Power System Protection
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Distributed Generation
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Engineering Diagnostics Tolls
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Flexible AC Transmission Systems
ECE 9400
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High Voltage DC Transmission System
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High Voltage Engineering
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Linear Systems and Modern Control Theory
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Logic Circuits Design
ECE 132
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Power Systems Analysis and Control
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Power Systems Steady State Analysis
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Research Methodology
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Projects
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Developing an executable software for automation purposes
In this task, we have developed an executable software to significantly enhance the accuracy of the study an reduce the study time
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Over 50 Model Quality Test (MQT) for Solar, Wind, and SESS interconnection in PSCAD
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NERC compliance assessment for a 230 MW windfarm interconnection
- Present
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power factor correction design with two stage capacitor bank
- Present
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Ferroresonance studies for relay replacement and damping resistor design
- Present
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18 MW+ 30 MW + 60 MW windfarm (type 1 and type 2) detail modeling in PSCAD along with detailed modeling of 10 MVAR STATCOM
- Present
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Insulation coordination study for traction overhead lines-lighting studies (PSCAD)
- Present
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Geomagnetic Disturbance (GMD) study and CAP solution (GIC-PSSE)
- Present
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HVDC Model Validation and Controller Upgrade for 2000 MW HVDC System (PSCAD, PSSE)
- Present
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Forensic studies of transformer cascade failure of a 150 MW windfarm (PSSE PSCAD MATLAB)
- Present
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Transformer Inrush Current Study in PSCAD and utilization of POW effect (PSCAD PSSE)
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Static and Dynamic Validation of Interconnection of 4 MW Biogas Power Plant At Lading UluKanchong, Negari Sembinan (Approved by TNB)
In this project, Loadflow, Short circuit, and voltage stability studies for interconnection of 4 MW Biogas power plant to the Malaysian power grid were studied. The project required data collection from the PMU units for 30 days. The power system close to the power plant was modeled in detailed in DigSilent software. For interconnection validation, both static and dynamic studies were performed and results presented to Malaysian Power utility (TNB).
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Voltage variation due to solar photovoltaic in distribution network
In this project, the effect of variation in solar radiation on the PV real power output has been studied.
Reactive power based control technique has been proposed to minimize the adverse effect of solar radiation on the PV power output quality.
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Power system study for 4.25 MW Solar PV plant at Padang Siding, Perlis.
Static and Dynamic power system studies for validation of grid interconnection of 4.25 MW soalr power plant at Padang, Malaysia has been studied. As a part of the group of 10 people, I worked as a design engineer my responsibilities were;
PMU unit data collection,
Site visit,
DigSilent and PSCAD single line diagram modeling of the proposed power system,
Static and Dynamic studies such as;
Load flow study,
Short circuit study,
Cable and transformer sizing,
Final report…Static and Dynamic power system studies for validation of grid interconnection of 4.25 MW soalr power plant at Padang, Malaysia has been studied. As a part of the group of 10 people, I worked as a design engineer my responsibilities were;
PMU unit data collection,
Site visit,
DigSilent and PSCAD single line diagram modeling of the proposed power system,
Static and Dynamic studies such as;
Load flow study,
Short circuit study,
Cable and transformer sizing,
Final report preparation
Attending final report presentation to TNB ( Malaysia Power Utility) and provide the detail of the study -
Electro Magnetic Field (EMF) studies for traction rails in close proximity to 69kV transmission lines
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Transient Over Voltage studies (lightning, capacitor switching, line energization) in PSCAD
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Coordination studies for Trasformer Tap, Capacitor bank, and PPC controller of the Wind farm in PSCAD
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TRV, TOV, CAP Switching Transient Studies in PSCAD EMT
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Sub Synchronous Resonance (SSR) Study for a thermal power plant interconnection
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In this project, I studied the interaction of a 70 MW thermal power plant with the rest of the system. It is identified that the generator will be in radial connection with a series compensated line at contingencies N-5 and above. The modal analysis showed the system negative damping at the SSR modes of oscillation. Detailed PSCAD study has been performed with a detailed multi-mass unit for the generator to investigate the SSR phenomena in detailed EMT studies.
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harmonic studies for traction substation with multiple convertor station
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System frequency scan and harmonic analysis for 240 MW wind farm interconnection
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Lightning strike study on Traction system overhead DC lines (PSCAD)
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Investigation and Mitigation of 0.5 Hz Oscillation in power system with multiple wind, solar, energy storage and FACTS devices (PSCAD PSSE)
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HVDC Dynamic Model Validation in PSSE (PSSE)
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In this project, the dynamic behaviour of a 600 MW HVDC system was evaluated considering various contingencies
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Power System Resonance Frequency Studies for 80 MVAR Capacitor Bank Installation (PSCAD)
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In this project, the effect of the addition of 80 MVAR capacitor bank to a power system is studied. The results indicated significant resonance phase shift towards the 3rd harmonic. A mitigation solutions was proposed to limit the phase shift effect on the system.
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1000 MW HVDC Model Validation in PSSE (PSSE)
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Fault Ride Through (FRT) assessment and enhancement of a 230 MW wind farm (PSCAD PSSE)
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Power System Stabilizer (PSS) for 1200 MW hydro power plant (PSSE and Matlab)
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Power System Stabilizer (PSS) tuning for 1200 MW hydro power plant (Matlab, PSCAD, PSS)
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Transient Recovery Voltage (TRV) study for 25 kV, 44 kV, 115 kV, and 230 kV breakers (PSCAD)
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HVDC and Network model development (2 HVDC links, 200 Buses, 50 Generators) in RTDS study (PSSE PSCAD RTDS)
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To test VSC controller functionality, Hardware in Loop (HIL) is performed in RTDS/RSCAD environment. The PSCAD model of two AC power systems are modeled in RSCAD and run on 5 RTDS Racks. The model will be provided to client for HIL test
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TRV/RRRV Studies Watay (PSSE PSCAD)
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Transient Recovery Voltage (TRV) study for 230 kV and 115 kV circuit breakers in PSCAD
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Generator Failure Forensic Study in PSCAD/EMTDC (PSSE PSCAD)
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Transformer energization with wrong POW breaker operation resulted in traveling of negative sequence current which caused the nearby generator tripping. The study is performed in PSCAD and PSSE software.
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20 MW Wind Farm Interconnection (ETAP)
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feasibility study for 20 MW Type 3 windfarm interconnection to 64 kV system
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Accurate 4.1-V, 850-mAh TCL PL-383562 Li-ion batteries modeling in commercialized PSCAD/EMTDC software
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Aggregated BESS system based on series and parallel connection of accurate 4.1-V, 850-mAh TCL PL-383562 Li-ion batteries model is simulated in PSCAD/EMTDC software. This model developed to investigate the behavior of large scale energy storage in power systems.
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Arcflash studies for 100 MW wind farm and its capacitor bank
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HYBRID POWER SYSTEM FOR PULAU BANGGI
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Pulau Banggi is the biggest island in Malaysia with the area of 440.7km². The study is done on varies possible renewable energy at Pulau Banggi and to select the most appropriate source for this case study. There are the wind, Photovoltaic (PV), hydro, biomass and geothermal. With HOMER software, the cost justification based on 25 years of microgrid operation was performed. the results show that 1.5 MW PV centralized power plant with battery energy storage would be the best possible solution to…
Pulau Banggi is the biggest island in Malaysia with the area of 440.7km². The study is done on varies possible renewable energy at Pulau Banggi and to select the most appropriate source for this case study. There are the wind, Photovoltaic (PV), hydro, biomass and geothermal. With HOMER software, the cost justification based on 25 years of microgrid operation was performed. the results show that 1.5 MW PV centralized power plant with battery energy storage would be the best possible solution to provide the island with electricity. Load flow study was carried with ETAP software.
Honors & Awards
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Outstanding Presentation in Graduate Symposium 2017
The department of Electrical and Computer Engineering
I have received the best presentation award among 60 presentation in ECE 2017 symposium at Western University.
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First Place Poster Award
7th International Conference on Integration of Renewable and Distributed Energy Resources
"First Place Poster Award” for the Poster " for "PV-STATCOM: A Novel Smart Inverter for Transmission and Distribution System Applications" in 7th International Conference on Integration of Renewable and Distributed Energy Resources, Niagara Falls, Canada, Oct. 24-28, 2016
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National Natural Sciences and Engineering Research Council of Canada (NSERC)
Industrial Post Graduate Scholarship (IPS 2)
In 2014, my proposal for Novel Power Oscillation Damping with Large-Scale PV Power Plant has been awarded for CAD 71,000 $. The research is funded by NSERC and Hydro One Inc through IPS 2 program.
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Western Graduate Research Scholarship.
Western Ontario University
Languages
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English
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Persian
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Organizations
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ieee
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- Present
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