SEYED SAEID HEIDARI YAZDI
@nu.edu.kz
Department of Electrical Engineering
Nazarbayev University
RESEARCH, TEACHING, or OTHER INTERESTS
Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Mirhamed Pourmirasghariyan, Seyed Saeid Heidari Yazdi, Jafar Milimonfared, Mehdi Abbasipour, and Mehdi Bagheri
Springer Science and Business Media LLC
S.S.H. Yazdi, S. Shafiei, A. Kapanov, Y. Shakhin, A. Namadmalan, and M. Bagheri
Institute of Electrical and Electronics Engineers (IEEE)
Adilkhan Kapanov, Seyed Saeid Heidari Yazdi, Sadjad Shafiei, Askat Kural, and Mehdi Bagheri
IEEE
It is suggested that capacitive power transfer (CPT) technologies can be used to recharge electric maritime vehicles' batteries. This work presents a configuration of the Underwater Unmanned Vehicle (UUV)-CPT system. The modelling of the systems' equivalent electrical circuit is discussed and the theoretical analysis of the External Watery Medium (EWM) on the Equivalent Circuit Parameters (ECPs) is conducted. To observe the effects of the EWM over the system, 3-D Finite Element Analysis (FEA) is performed on both cases with and without EWM. Using the Particle Optimization Algorithm (PSO), the calculations for the new ECPs of circular electric couplers are specified and the implications of EWM are carried out. The accuracy of the proposed parameter specification approach is examined and verified through experimental setup. The system-level impacts of EWM on the performance of the capacitive power transfer system are analyzed.
Sadjad Shafiei, Seyed Saeid Heidari Yazdi, Adilkhan Kapanov, Mostafa Kermani, Almaz Saukhimov, Arsalan Hekmati, and Mehdi Bagheri
Institute of Electrical and Electronics Engineers (IEEE)
Seyed Saeid Heidari Yazdi, Sadjad Shafiei, Adilkhan Kapanov, Mostafa Kermani, Amin Hajizadeh, and Mehdi Bagheri
IEEE
In this paper, the component-level and systemlevel influences of sea environments on the inductive power transfer (IPT) system are investigated. Archimedean coils are placed on the seabed and under the underwater unmanned vehicle (UUV) to recharge UUV's battery during its marine life monitoring mission and prolong its mission duration. However, seawater, characterized by its conductivity and relative permeability, acts as an external medium for the IPT system and influences its equivalent circuit parameters (e.g. self and mutual inductances and resistances). To study these influences, finite element method (FEM) studies are performed, and the impacts of the watery external medium on the magnetic flux lines distributions are investigated. Also, the process of inducing eddy currents in the watery external medium is analyzed and illustrated. Besides, an analytic method is proposed to reflect the impacts of the external watery medium on the equivalent circuit parameters of the IPT system. A preliminary analysis is also performed to study the impacts of the watery medium on system-level performances of the IPT system (e.g. output power, efficiency). The obtained results from theoretical and FEM studies are cross-verified by performing experimental studies over a prototype IPT system.
Seyed Saeid Heidari Yazdi, Sadjad Shafiei, Adilkhan Kapanov, Yussuf Shakhin, Alireza Namadmalan, Amin Zollanvari, and Mehdi Bagheri
Institute of Electrical and Electronics Engineers (IEEE)
This study proposes a wireless charging system (WCS) based on a domino resonant inductive power transfer (DR-IPT) system and series compensators to charge the batteries of unmanned aerial vehicles (UAVs) from distribution poles. Based on numerical metaheuristic optimizations, a comprehensive independent design parameter (IDP) method is proposed for the DR-IPT system. Self and mutual inductances and resistances of the coils are specified analytically as a function of the IDPs. Then, the electric equivalent circuit of the system is derived and analyzed. A multiobjective function is defined to meet design objectives simultaneously (supply of the nominal charging power, maximum efficiency, minimum copper weight, and uniform voltage rating of capacitors). Inequality constraints are included to satisfy the zero voltage switching condition of the input inverter, the size restrictions, and the maximum current density of the coils. Several case studies are defined, examined, and analyzed to determine the impact level of the available IDPs (geometries, interval space, and natural resonant frequency of coils), multiobjective weight factors, battery specifications, and implementation of the constant-current charging regime over the performance of the system. The successful performance of the proposed UAV WCS and IDP design method has been technically discussed and experimentally shown. The impacts of the proposed WCS on the flight time and travel distance of the test UAV are experimentally discussed.
Seyed Saeid Heidari Yazdi, Amin Hajizadeh, and Mehdi Bagheri
Elsevier BV
Seyed Saeid Heidari Yazdi, Kumars Rouzbehi, Miguel Jiménez Carrizosa, Amir Heidary, and Mehdi Bagheri
Institute of Electrical and Electronics Engineers (IEEE)
Future high-voltage direct-current (HVDC) networks based on voltage source converters (VSCs) will have different structures (asymmetric monopolar, bipolar, or symmetric monopolar), voltage levels, control, and protection schemes. Therefore, dc–dc converters are needed to interconnect those VSC-HVDC grids and several technical issues on their control and operational systems must be adequately addressed. A dc–dc converter based on a modular-dual active bridge (M-DAB) converter is suggested to reach a desirable interconnection of the HVDC grids and regulate power flow (PF) between them. A dynamic averaged model is proposed for the M-DAB converter and its stability is analyzed using the Lyapunov function. Moreover, a new local controller based on nonlinear control theory is proposed for the M-DAB. The new M-DAB local controller is integrated with the energy management system (EMS), by updating the PF equations, to create a complete control structure. Considering the CIGRE DCS3 HVDC test system and the studied M-DAB, static, dynamic simulation, and experimental studies are conducted and the dc–dc converter and the performance of the designed controllers and the EMS are examined and validated.
Seyed Saeied Heidari Yazdi, Yaser Shokri‐Kalandaragh, and Mehdi Bagheri
Institution of Engineering and Technology (IET)
Sadjad Shafiei, Seyed Saeid Heidari Yazdi, Adilkhan Kapanov, Mostafa Kermani, Arsalan Hekmati, and Mehdi Bagheri
IEEE
Minimizing the permanent magnets (PMs) consumption while maintaining the performance of the machine is highly important in the new designs. This paper seeks a structure for PS-FSM with a reduced PM volume, ensuring the maintenance of the torque density and minimizing torque ripple. First, based on the existing partitioned-stator flux-switching permanent-magnet machines (PS-FSPM), a preliminary topology is proposed. The split ratio (SR) and the number of rotor teeth are optimized for the proposed machine and compared with the conventional structure. The finite element analysis (FEA) is employed for the simulation study. The FEA results reveal that the studied machine offers more desirable PM consumption with acceptable torque density and less torque ripple. Second, the primarily proposed topology is modified and a DC field excitation is considered to achieve a final structure with a hybrid-excited machine. The flux-enhancing and flux-weakening capabilities are analyzed for the modified structure.
Adilkhan Kapanov, Ali Almaganbet, Seyed Saeid Heidari Yazdi, and Mehdi Bagheri
IEEE
Dynamic wireless charging of EVs is an autonomous and user-friendly method for wireless battery charging of electric vehicles. However, the power transmission efficiency of the system is affected by the design of the transmitter and receiver coils. The main objective of this research is to optimize the design parameters of the transmitter and receiver coils using the Particle Swarm optimization (PSO) Algorithm. In the optimization the vertical distance between magnetic coils is dictated by the car model and the air core inductive resonant wireless power transfer (WPT) system is considered. Validity of the optimized coil parameters is ensured by performing finite element simulation in the ANSYS Electronics Desktop platform.
Bayandy Sarsembayev, Seyed Saeid Heidari Yazdi, Sadjad Shafiei, Mostafa Kermani, Almaz Saukhimov, and Mehdi Bagheri
IEEE
This study analyzes the closed-loop control strategy for the domino resonant inductive power transfer (DR-IPT) system (modulation of DC-link voltage, phase shift, and switching frequency) for wireless battery charging. A high-voltage AC line (HVAC) is supposed to provide the initial AC voltage for the power converter. Three closed-loop control scenarios are used and the performance of the DR-IPT is examined. The frequency and phase shift controls are applied directly to the full-bridge inverter via the PWM technique, and the DC-link voltage control is employed with the buck-boost converter. This study shows that PI controllers are appropriate to achieve the desired system performance to charge a LiPo battery. Also, the simulation results reveal that the charging process can be effectively regulated using controllers; however, among different approaches, the phase shift control method might be considered the most suitable approach for charging the LiPo battery and avoiding bifurcation and increasing the cost of the RD-IPT system.
Sadjad Shafiei, Seyed Saeid Heidari Yazdi, Mostafa Kermani, Almaz Saukhimov, Arsalan Hekmati, and Mehdi Bagheri
IEEE
In this study, an inductive-capacitive coupling wireless power transmission (IC-UWPT) system in the seawater environment is discussed. It is revealed that the conductive characteristic of seawater medium will change the eddy current flow as compared to the air medium, and in higher frequency ranges, will increase power dissipation and affect the total efficiency and ultimately the system's performance. A new equivalent circuit is provided to precisely model the seawater WPT, where the eddy current losses are referred to as an additional term coil's parameter in the circuit model. Using Ansys Electronics, simulation studies are carried out in both air and water environment. The eddy current and electrostatic solutions are adopted for IPT and CPT system analysis. Moreover, Ansys Simplorer is utilized to couple the proposed IPT-CPT combined system. The simulation results validate the introduced model for the underwater IPT -CPT system and its performance.
Mirhamed Pourmirasghariyan, Mirsajed Pourmirasghariyan, Seyed Saeid Heidari Yazdi, Seyyed Yousef Mousazadeh Mousavi, Kumars Rouzbehi, and G. B. Gharehpetian
IEEE
The performance of Interline DC Power Flow Controllers (IDC-PFCs) in Voltage Source Converters (VSC)-based High Voltage Direct Current (HVDC) grids, can be affected due to different issues. The current limitation of HVDC lines, the voltage limitation of HVDC buses, and DC voltage of the IDC-PFC intermediary capacitor prevent effective and efficient operation of IDC-PFCs. In this paper, it is shown that this issue can be overcome by using a virtual capacitor in parallel with the IDC-PFC intermediary capacitor. Also, an energy control-based scheme is proposed for the operation of IDC-PFCs in VSC-HVDC grid. The benefits of using the virtual capacitor are: widening the operational area of the IDC-PFCs for the determined duty cycle and injecting more voltage in series to the interconnected HVDC line to control the related HVDC line current. The proposed solution is successfully evaluated on a CIGRE three-terminal VSC-HVDC grid which is modeled by linearized space-state equations.
Mirhamed Pourmirasghariyan, Jafar Milimonfared, Seyed Saeid Heidary Yazdi, and Kumars Rouzbehi
Institute of Electrical and Electronics Engineers (IEEE)
This article proposes a hybrid method to find the optimal place of dc power flow controllers (DC-PFC)s in HVdc grids. This hybrid method consists of max flow-min cut theory with Ford–Fulkerson augmenting paths and combining sensitivity analysis to find the most important HVdc lines and the best placement. In this article, series DC-PFC is modeled and get placed. A significant advantage of this method is, reducing the computational burden of calculations by finding the most important and susceptible HVdc lines to get overloaded without focusing on other unnecessary HVdc lines. The static security of the power system strongly depends on the placement of DC-PFCs, which has become an important issue because of rapid-developing of HVdc grids. Static security studies have been done on an eight-terminal HVdc grid incorporating double scenarios.
Seyed Saeid Heidari Yazdi, Tohid Rahimi, Saeideh Khadem Haghighian, Gevork B. Gharehpetian, and Mehdi Bagheri
Frontiers Media SA
The increase of Photovoltaics (PV) units’ penetration factor in the power grids might create overvoltage over the network buses. The active power curtailment (APC) and the reactive power provision methods use inverters to regulate their output active and reactive powers for high PV-penetrated grids. However, the mentioned solutions would reduce the maximum injectable active solar power to the grid, not financially acceptable. Continuous employment of the maximum apparent power capacity of the inverters will practically decrease the inverters’ lifetime, require special design considerations, and make the control system complex. To overcome those issues, a feasible solution would be increasing the load consumption within the time intervals in which the grid faces the over-voltage problem. In this research, the demand response (DR) program is employed. Load shifting techniques are exerted to move a portion of loads from the peak hours to when further power consumption is expected for voltage level reduction purposes. A new long-term strategy based on the coordinated operation of the PV inverters and load shifting techniques is proposed to resolve the over-voltage issue in the network. Consequently, the PV inverter’s contribution to voltage control is reduced; a new sight of DR potential is implemented, and also the under-voltage level in peak times is decreased significantly.
Sadjad Shafiei, Seyed Saeid Heidari Yazdi, Tleukhan Mussin, Yussuf Shakhin, Alireza Namadmalan, and Mehdi Bagheri
IEEE
The impacts of high voltage (HV) insulators on equivalent circuit parameters of wireless power transfer (WPT) system is evaluated and analyzed in this study. Flat spiral coils are inserted under the HV insulators and convey power to charge monitoring devices' battery at the top of the power line towers. All the external metal objects over the magnetic flux path are identified, and their material type, relative permeability, and conductivity are explained. An equivalent circuit for the WPT system is specified, and its parameters are calculated with and without the presence of external metal objects. In this sense, 3-D finite element method (FEM) simulations are conducted in ANSYS Maxwell. The variation of the magnetic flux within the airgaps is displayed, the eddy current induction initiation over the external metal objects is shown, and changes in the equivalent circuit parameters of the WPT system are clearly discussed. The results of the simulation study are then validated through experimental studies by means of fabricated flat spiral coils.
Mirsajed Pourmirasghariyan, Mirhamed Pourmirasghariyan, Seyed Fariborz Zarei, Mohsen Hamzeh, and Seyed Saeid Heidari Yazdi
IEEE
This paper presents a new scheme for the maximum power point tracking (MPPT) in the grid-connected photovoltaic (PV) systems by the Packed U-Cell (PUC) inverter. A single-phase 7-level PUC inverter composed of six switches and DC link (secondary capacitor) is modeled to illustrate the proposed MPPT scheme. The PUC inverter employs the model predictive controller (MPC) with a cost function optimization (CFO) approach. The CFO approach optimally produces the switching states of the inverter so that the maximum power of the PV is extracted. To validate the functionality of the proposed MPPT scheme, a complete set of simulation results are provided using the MATLAB Simulink environment. According to the obtained results, it is verified that the proposed approach effectively controls the output voltage of the PV arrays, and subsequently, extract and inject the maximum power of the PV arrays into the grid by a high power quality.
Bayandy Sarsembayev, Seyed Saeid Heidari Yazdi, Adilkhan Kapanov, and Mehdi Bagheri
IEEE
In this research study, a Thevenin equivalent circuit model (ECM) has been proposed for the Lithium-ion polymer battery (LiPo). Modeling the LiPo battery is essential to estimate (state of charge) SOC in the battery management system (BMS). Three RC parallel networks’ parameters have been analytically found based on analyzing voltage relaxations after each applied current pulse. The coulomb counting algorithm is utilized for SOC estimation of the battery. The simulation results of terminal voltage under constant 2C current rate and pulsed current discharge are in good agreement with experimental data obtained.
Seyed Saeid Heidari Yazdi, Alireza Namadmalan, Adilkhan Kapanov, Amin Zollanvari, and Mehdi Bagheri
IEEE
In this research, a novel optimal design process is proposed for the domino inductive power transfer (D-IPT) system which is able to charge the battery of an unmanned aerial vehicle (UAV) from the high voltage transmission line. The series topology is assumed for the compensating circuits; the application of flat spiral coils embedded in the insulators and under the UAV is considered; the mutual inductance matrix is calculated accurately. The optimal design process is essential to provide the nominal charging power to the UAV's battery while maximizing the power transfer efficiency, respecting the zero voltage switching of the power electronic switches and the space limitations of the coils. In the proposed process, a metaheuristic solver is applied to resolve the defined objective function properly and handle included inequality constraints, and thus determine critical parameters for the coils (inner radius, turn number, screw pitch, compensating capacitance). If it is not deemed fit to embed repeater coils in all candidate insulators, optimal locations of host insulators for repeater coils embedment can also be determined. The proposed optimal design process has been successfully evaluated and verified by developing a system model and optimization scripts in MATLAB software and conducting simulations through the MATLAB/Simulink platform.
Bayandy Sarsembayev, Seyed Saeid Heidari Yazdi, and Mehdi Bagheri
IEEE
In this research study, a discrete PI controller-based back-calculation algorithm with anti-windup scheme is proposed for the charging control of Lithium Polymer (LiPo) batteries used in Unmanned Aerial Vehicle (UAV). Due to their energy density, lightweight, customized shape, and the size characteristics; these types of batteries are quite popular particularly in UAV applications. However, the battery operation time is quite limited; therefore, an efficient battery charging control system needs to be designed and be able to decrease the charging time without damaging the battery cells. Due to so-called windup phenomena in conventional PI controllers, the performance battery charging control system may face with less performance. The control system regulates the rate of current drawn from the battery to avoid overheating that in turn potentially can lead to a catastrophic deformation of the battery pack. The optimal control parameters of the system are defined based on the dynamic response of the system. The proposed control system is able to decrease the tracking errors in transient periods. However, the tracking performance in the steady-state is similar in both controllers. The simulation of the charging control system is emulated and evaluated and Matlab/Simulink software.
Mirhamed Pourmirasghariyan, Jafar Milimonfared, Seyed Saeid Heidari Yazdi, Ali Haji Ali Biglo, and Kumars Rouzbehi
IEEE
This paper proposes an approach for selecting an optimal placement and control variable setting by finding the worst contingencies for the recently proposed Interline Direct Current Power Flow Controller (IDC-PFC) in MultiTerminal High-Voltage DC (MT-HVDC) Grids based on Max Flow- Min Cut Theory. It is for Optimal PFCs’ placements that purposes to optimize the maximum capacities of the transmission grid. Optimal settings for finding the most critical HVDC lines in a meshed grid and deciding where to place the PFC afterward. The controllable Voltage Source Converters (VSC)s are computed by applying a sequential quadratic programming solver in MatLab to the developed security-based DC optimal power flow problem including several corrective constraints.
Mehdi Abbasipour, Seyed Saeid Heidary Yazdi, Jafar Milimonfared, and Kumars Rouzbehi
Institute of Electrical and Electronics Engineers (IEEE)
Power flow (PF) flexibility in the multi-terminal HVDC (MT-HVDC) grids is a thought-provoking issue. It leads to employing the active DC power flow controller (DC-PFC)s. Hence, this paper examines the static average model (AM) and power injection model (PIM) of an interline DC-PFC (IDC-PFC). It is to provide a suitable base for DC PF studies and easy embedding of the DC-PFCs into MT-HVDC grids’ PF equations. In this regard, this paper proposes a new DC PF solver (DC-PFS) for the IDC-PFC compensated MT-HVDC grids within the well-accepted Newton-Raphson (NR) framework. It requires a few modifications in the main structure of the system's Jacobin (J) matrix compared to the uncompensated MT-HVDC grid. Also, the system's admittance matrix and its symmetry are preserved. In the proposed concept, the IDC-PFC cooperates with other MT-HVDC grid's state variables to satisfy the predetermined control objective(s). Furthermore, this paper proposes a new solution procedure (SP) to handle various system's limitations during the processes of solving the DC PF problem. Meanwhile, there is no need to modify the related J matrix. The effective and accurate performance of the IDC-PFC's models, as well as presented NR-based DC-PFS and SP, are verified by performing several simulations on the 8-bus CIGRE MT-HVDC grid.
Altynay Smagulova, Seyed Saeid Heidari Yazdi, and Mehdi Bagheri
IEEE
The purpose of this study is to model and simulate a wireless charging system for Unmanned Aerial Vehicles (UAVs) using overhead power lines. Wireless charging of UAV decreases human intervention and facilitates their application in other industries. This study has studied the performance of single-coil and domino-based wireless charging systems that autonomously charge UAVs over power lines. It has studied the impact of system parameters like coil and WPT configurations on the received voltage and power of single-coil WPT and domino-based WPT. According to simulations, the inductance of the coils increases with the increase of the number of coils turns. Thus, the output voltage is higher for coils with more turns. Then the performance of the single coil has been compared with the performance of the domino-based WPT system in terms of their output voltage and transfer distance. It was concluded that a domino-based WPT system can transfer more energy at larger distances while operating at the resonant frequency of 18.5 kHz. The amount of output voltage is almost four times higher for resonator-based WPT system compared to single coil WPT system where the WPT system and coil design parameters are the same.
Seyed Saeid Heidary Yazdi, Jafar Milimonfared, Seyed Hamid Fathi, and Kumars Rouzbehi
Institute of Electrical and Electronics Engineers (IEEE)
This paper proposes a communication-free control strategy at the offshore wind farm (OWF) level to enhance onshore fault ride-through (FRT) grid code compliance of the voltage source converter (VSC)-based multi-terminal high voltage direct current (MT-HVDC) grid. In this proposal, the emerging virtual synchronous generator (VSG) concept is employed to equip the Type 4 wind turbine generator (WTG)s with inherent grid forming ability. Accordingly, it is proposed to switch the offshore HVDC converters control mode from grid forming to grid feeding during onshore FRT period to realize direct wind power in-feed reduction as a function of the severity of MT-HVDC grid’s overvoltage. The related dynamics are mainly characterized by the high-speed current control loop, so improved OWF response is achieved during onshore FRT period as conventional voltage/frequency modulation strategies are not employed. New analysis/amendments are also proposed to study and improve the transient active power reduction sharing between the WTGs in first few power cycles under wind wake effect. Finally, with the objective of a smooth transfer of HVDC converters and WTGs in several proposed operation states, a set of state machines are proposed considering whole WTG’s dynamics. Comprehensive time-domain simulations are performed with averaged electromagnetic transient models to demonstrate the improved onshore FRT behavior in terms of minimizing the electrical stress at both MT-HVDC grid and OWF levels.