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By the increase of the penetration of power-electronic-based (PE-based) units, such as wind turbines and PV systems, many features of those power systems, such as stability, security, and protection, have been changed. In this paper, the security of electrical grids with high wind turbines penetration is discussed. To do so, first, an overview of the power systems’ security assessment is presented. Based on that, stability and security challenges introduced by increasing the penetration of wind turbines in power systems are studied, and a new guideline for the security assessment of the PE-based power systems is proposed. Simulation results for the IEEE 39-bus test system show that the proposed security guideline is necessary for PE-based power systems, as the conventional security assessments may not be able to indicate its security status properly.
Bahram Shakerighadi; Saeed Peyghami; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Back. A New Guideline for Security Assessment of Power Systems with a High Penetration of Wind Turbines. Applied Sciences 2020, 10, 3190 .
AMA StyleBahram Shakerighadi, Saeed Peyghami, Esmaeil Ebrahimzadeh, Frede Blaabjerg, Claus Leth Back. A New Guideline for Security Assessment of Power Systems with a High Penetration of Wind Turbines. Applied Sciences. 2020; 10 (9):3190.
Chicago/Turabian StyleBahram Shakerighadi; Saeed Peyghami; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Back. 2020. "A New Guideline for Security Assessment of Power Systems with a High Penetration of Wind Turbines." Applied Sciences 10, no. 9: 3190.
Bahram Shakerighadi; Esmaeil Ebrahimzadeh; Mads Graungaard Taul; Frede Blaabjerg; Claus Leth Bak. Modeling and Adaptive Design of the SRF-PLL: Nonlinear Time-Varying Framework. IEEE Access 2020, 8, 28635 -28645.
AMA StyleBahram Shakerighadi, Esmaeil Ebrahimzadeh, Mads Graungaard Taul, Frede Blaabjerg, Claus Leth Bak. Modeling and Adaptive Design of the SRF-PLL: Nonlinear Time-Varying Framework. IEEE Access. 2020; 8 ():28635-28645.
Chicago/Turabian StyleBahram Shakerighadi; Esmaeil Ebrahimzadeh; Mads Graungaard Taul; Frede Blaabjerg; Claus Leth Bak. 2020. "Modeling and Adaptive Design of the SRF-PLL: Nonlinear Time-Varying Framework." IEEE Access 8, no. : 28635-28645.
Increasing use of power electronic-based (PE-based) units has intensified the importance of the security scope of power systems. So far, the conventional security assessment approaches are used in the modern PE-based power system. It is not sufficient for the analysis of the system security. In this paper, a new scope of the PE-based power system security is proposed. To do so, the security assessment of PE-based units are involved in the general range of the system security assessment. More specifically, the transient stability and security of the grid-connected voltage source converters (VSCs) are studied in the scope of dynamic security of the PE-based power systems. Obtained results show that the new security scope gives a valuable viewpoint of the system security assessment in comparison with the conventional security schemes.
Bahram Shakerighadi; Saeed Peyghami; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Bak. Security Analysis of Power Electronic-based Power Systems. IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society 2019, 1, 4933 -4937.
AMA StyleBahram Shakerighadi, Saeed Peyghami, Esmaeil Ebrahimzadeh, Frede Blaabjerg, Claus Leth Bak. Security Analysis of Power Electronic-based Power Systems. IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society. 2019; 1 ():4933-4937.
Chicago/Turabian StyleBahram Shakerighadi; Saeed Peyghami; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Bak. 2019. "Security Analysis of Power Electronic-based Power Systems." IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society 1, no. : 4933-4937.
Bahram Shakerighadi; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Bak. Large Signal Stability Assessment of the Grid-Connected Converters based on its Inertia. 2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe) 2019, 1 .
AMA StyleBahram Shakerighadi, Esmaeil Ebrahimzadeh, Frede Blaabjerg, Claus Leth Bak. Large Signal Stability Assessment of the Grid-Connected Converters based on its Inertia. 2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe). 2019; ():1.
Chicago/Turabian StyleBahram Shakerighadi; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Bak. 2019. "Large Signal Stability Assessment of the Grid-Connected Converters based on its Inertia." 2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe) , no. : 1.
By the proliferation of Electric Vehicles (EVs) in power systems, it is needed to manage their demand energy within a regulated market framework. From the market perspective, integration of different market players, such as the energy producers, aggregators, and loads, could complicate the system operation and management. Therefore, an appropriate model of the market, which shows the exact behavior of the system components is needed. In this paper, a new tri-level game theoretical-approach for energy management of EVs and Electric Vehicle Charging Stations (EVCSs) as independent decision makers for their energy scenarios, is proposed. To make it practical for a real power system, the system operator is also included in the proposed method as a master decision maker. Therefore, EVs’ and EVCSs’ objectives are to maximize their financial profits, while the system operator indirectly controls their energy scenarios in order to fulfill the system’s technical constraints. To do so, at the highest level of the proposed method, technical goals of the system, which are related to the system operational condition, will be followed as the objective criteria. At the second level of the designed model, the EVCSs financial objectives are optimized. In the third level of the proposed method, it is tried to minimize the EVs’ cost function. The method is tested on an IEEE 9-bus standard system, and the results show superior performance of the proposed energy management system (EMS) compared to the conventional EMS methods in terms of technical and financial objectives. In this way, it is shown that in the case of considering only one aspect of the system, either financial or technical, the other aspects of the system may not be satisfied. Hence, it is essential to consider both the financial and technical aspects of the system simultaneously, in order to operate the system optimally and securely.
Bahram Shakerighadi; Amjad Anvari-Moghaddam; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Bak. A Hierarchical Game Theoretical Approach for Energy Management of Electric Vehicles and Charging Stations in Smart Grids. IEEE Access 2018, 6, 67223 -67234.
AMA StyleBahram Shakerighadi, Amjad Anvari-Moghaddam, Esmaeil Ebrahimzadeh, Frede Blaabjerg, Claus Leth Bak. A Hierarchical Game Theoretical Approach for Energy Management of Electric Vehicles and Charging Stations in Smart Grids. IEEE Access. 2018; 6 (99):67223-67234.
Chicago/Turabian StyleBahram Shakerighadi; Amjad Anvari-Moghaddam; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Bak. 2018. "A Hierarchical Game Theoretical Approach for Energy Management of Electric Vehicles and Charging Stations in Smart Grids." IEEE Access 6, no. 99: 67223-67234.
Grid-connected Voltage Source Converters (VSCs) are widely used in Power Electronic-based (PE-based) power systems. Therefore, it is necessary to have stability analysis tools for different system conditions. In this paper, Lyapunov- and eigenvalue-based methods are used in order to analyze the stability of the grid-connected VSC. This Lyapunov-based technique is valid for large-signal stability analysis, when the system is subjected to a large disturbance. Eigenvalue-based methods are simpler but these are not valid under large disturbance conditions. The Lyapunov-based analysis can systematically model the linear and non-linear behavior of the grid-connected VSCs.
Bahram Shakerighadi; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Bak. Lyapunov- and Eigenvalue-based Stability Assessment of the Grid-connected Voltage Source Converter. 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) 2018, 1 -6.
AMA StyleBahram Shakerighadi, Esmaeil Ebrahimzadeh, Frede Blaabjerg, Claus Leth Bak. Lyapunov- and Eigenvalue-based Stability Assessment of the Grid-connected Voltage Source Converter. 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC). 2018; ():1-6.
Chicago/Turabian StyleBahram Shakerighadi; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Bak. 2018. "Lyapunov- and Eigenvalue-based Stability Assessment of the Grid-connected Voltage Source Converter." 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC) , no. : 1-6.
In this paper, a Lyapunov-based method is used in order to determine the stability boundaries of the grid-connected voltage source converter (VSC). To do so, a state space model of the VSC is used to form the Lyapunov function of the system. Then, by using the eigenvalues of the Lyapunov function, the system stability boundaries will be determined. It is shown that the grid-connected VSC works in its stable mode when all of its Lyapunov function’s eigenvalues are positive. The proposed model validity is tested by time-domain simulation. Simulation results show that the method is credible in determining the stability margin of the grid-connected VSC.
Bahram Shakerighadi; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Bak. Large-Signal Stability Modeling for the Grid-Connected VSC Based on the Lyapunov Method. Energies 2018, 11, 2533 .
AMA StyleBahram Shakerighadi, Esmaeil Ebrahimzadeh, Frede Blaabjerg, Claus Leth Bak. Large-Signal Stability Modeling for the Grid-Connected VSC Based on the Lyapunov Method. Energies. 2018; 11 (10):2533.
Chicago/Turabian StyleBahram Shakerighadi; Esmaeil Ebrahimzadeh; Frede Blaabjerg; Claus Leth Bak. 2018. "Large-Signal Stability Modeling for the Grid-Connected VSC Based on the Lyapunov Method." Energies 11, no. 10: 2533.
This paper reveals that the existing techniques have some deficiencies in the proper estimation of voltage stability margin (VSM) when applied to a power system with different load change scenarios. The problem gets worse when credible contingencies occur. This paper proposes a real-time wide-area approach to estimate VSM of power systems with different possible load change scenarios under normal and contingency operating conditions. The new method is based on an artificial neural network (ANN) whose inputs are bus voltage phasors captured by phasor measurement units (PMUs) and rates of change of active power loads. A new input feature is also accommodated to overcome the inability of trained ANN in prediction of VSM under N−1 and N−2 contingencies. With a new algorithm, the number of contingencies is reduced for the effective training of ANN. Robustness of the proposed technique is assured through adding a random noise to input variables. To deal with systems with a limited number of PMUs, a search algorithm is accomplished to identify the optimal placement of PMUs. The proposed method is examined on the IEEE 6-bus and the New England 39-bus test system. Results show that the VSM could be predicted with less than 1% error.
Bahram Shakerighadi; Farrokh Aminifar; Saeed Afsharnia. Power systems wide-area voltage stability assessment considering dissimilar load variations and credible contingencies. Journal of Modern Power Systems and Clean Energy 2018, 7, 78 -87.
AMA StyleBahram Shakerighadi, Farrokh Aminifar, Saeed Afsharnia. Power systems wide-area voltage stability assessment considering dissimilar load variations and credible contingencies. Journal of Modern Power Systems and Clean Energy. 2018; 7 (1):78-87.
Chicago/Turabian StyleBahram Shakerighadi; Farrokh Aminifar; Saeed Afsharnia. 2018. "Power systems wide-area voltage stability assessment considering dissimilar load variations and credible contingencies." Journal of Modern Power Systems and Clean Energy 7, no. 1: 78-87.
The Internet of Things (IoT) is beginning to shape the future of many industries and emerging markets. One of the target markets for IoT is the energy systems. IoT is a matter of producing, transferring, and processing information, therefore all parts of the system including software and hardware parts should be considered as a whole. In this paper, a state-of-the-art of the IoT-based energy systems is presented to review the recent activities on every component of IoT in energy systems. Challenges in this subject area are discussed, and some solutions are presented thereafter.
Bahram Shakerighadi; Amjad Anvari-Moghaddam; Juan C. Vasquez; Josep M. Guerrero. Internet of Things for Modern Energy Systems: State-of-the-Art, Challenges, and Open Issues. Energies 2018, 11, 1252 .
AMA StyleBahram Shakerighadi, Amjad Anvari-Moghaddam, Juan C. Vasquez, Josep M. Guerrero. Internet of Things for Modern Energy Systems: State-of-the-Art, Challenges, and Open Issues. Energies. 2018; 11 (5):1252.
Chicago/Turabian StyleBahram Shakerighadi; Amjad Anvari-Moghaddam; Juan C. Vasquez; Josep M. Guerrero. 2018. "Internet of Things for Modern Energy Systems: State-of-the-Art, Challenges, and Open Issues." Energies 11, no. 5: 1252.