Vahid Sohrabi Tabar

University of Tabriz · Faculty of Electrical and Computer Engineering

Secure energy providing is a critical feature of sustainable societies, where this subject requires reliable operation of generation, transmission and distribution infrastructures. In order to achieve the mentioned goal, the influence of uncertainties should be analyzed using appropriate methods, criteria and tools. The high-impact low-probability...

The study provided a techno-economic optimization technique for acquiring the ideal battery storage capacity in conjunction with a solar array capable of meeting the desired residential load with high levels of self-sufficiency. Moreover, the viability of a proposed photovoltaic battery system was evaluated. With a resolution of one minute, the ann...

The paper carried out a techno-economic analysis in order to obtain the optimum battery storage capacity in conjunction with a photovoltaic array that can match the desired household load at highest possible self-consumption. In addition, it determined the economic feasibility of a proposed micro-system. Annual energy consumption, irradiance, and a...

Despite having enormous fossil fuel resources, the Middle East is susceptible to drops in oil and gas prices, which hurts the country budget. Even while the Middle Eastern countries that import energy enjoy cheaper energy costs, several of these nations have experienced war, social disorder, and political upheaval, which has made the position of th...

The study examines the methods for producing hydrogen using solar energy as a catalyst. The two commonly recognised categories of processes are direct and indirect. Due to the indirect processes low efficiency, excessive heat dissipation, and dearth of readily available heat-resistant materials, they are ranked lower than the direct procedures desp...

The penetration of renewable resources and electric vehicles has increased in recent years due to various benefits such as reducing environmental pollution. This paper optimizes the energy management of a microgrid integrated with battery charging and swapping stations in the presence of renewable resources and crypto-currency miners as an emerging...

The electrolysis of renewable energy to produce hydrogen has become a strategy for supporting a decarbonized economy. However, it is typically not cost-effective compared to conventional carbon-emitting methods. Due to the predicted intermediate of low-and zero-marginal-cost renewable energy sources, the ability of electrolysis to connect with elec...

The paper discusses the feasibility of the use solar energy into hydrogen production using a photovoltaic energy system in the four main cities of Iraq. An off-grid photovoltaic system with a capacity of 22.0 kWp, an 8.0 kW alkaline electrolyser, a hydrogen compressor, and a hydrogen tank were simulated for one year in order to generate hydrogen. A...

The cooperative planning of interconnected networks to achieve a sustainable operation and satisfy the welfare of all agents has become a critical issue. This paper optimizes the joint scheduling of integrated electricity and gas grids composed of wind turbines, photovoltaics, storage systems, power to gas and gas to power units. In this regard, a...

In the article, the viability of adopting photovoltaic energy systems to convert solar energy into hydrogen in Iraqi four main cities are examined. A 22 kWp off-grid solar system, an 8 kW alkaline electrolyzer, a hydrogen compressor, and a hydrogen tank were modeled for an entire year in order to produce hydrogen. Using hourly experimental weather...

In order to mitigate the influence of global warming and greenhouse gasses emission, different proceedings are suggested such as utilizing renewable energies and demand response programs. This paper investigates the expansion of renewable resources and electrical energy storage units in distribution systems towards reducing investment costs and e...

Integration of different infrastructures has become an interesting subject due to many advantages such as high flexibility and reliability. However, interconnection and coordination of components create critical challenges. In this paper, the day-ahead planning of a renewable multi-carrier system composed of various resources, loads and storage uni...

The environmental pollution problem is intensified in recent years due to increasing fossil fuel consumption. In this regard, deployment of renewable resources can be a practical solution to decrease greenhouse gases and global warming. This paper proposes a risk-aware multi-objective programming consisting of operation cost and pollution objective...

This paper investigates the eco-emission analysis of a hybrid microgrid by assuming different penetration levels of thermal resources and considering storage devices in the presence of demand response programs. The dual-objective scheduling is done for 24 hours (i.e., 4*6-time intervals). The total cost and contamination of the hybrid microgrid are...

Retailers are intermediaries between producers and consumers and supply electricity to consumers which are not willing or are not permitted to take part in wholesale markets. In retailer planning, optimal mix of electricity procurement resources as well as optimal price of demands are determined. In this research, a risk-averse two-stage stochastic...

In electricity markets, there is a significant time gap between clearing of the market and operation of power system, so there is a significant probability of contingency for generators and transmission lines. In security-constrained market clearing (SCMC), the possible contingencies are taken into account. Review of the literature indicates that t...

Energy hubs (EHs) are units that enable the simultaneous supply of different types of energy demands by converting energy carriers, and using energy storage systems. Energy storage systems can significantly help maintain the balance between energy production and energy demand, while enabling the use of renewable energy resources , and improve the f...

Energy Hubs (EHs) play an important role in sustainable cities; they are multi-carrier energy systems that can satisfy different energy needs of consumers by relying on the conversion and storage of energy sources as well as renewable energy sources. With efficient and reliable energy supply, EHs may significantly contribute in developments of sust...

Due to the increase in global warming and environmental pollution, heavy penalties have been imposed on pollution producers such as electrical energy networks. Hence, the role of renewable resources expansion in power systems is unavoidable. However, their high penetration increases the uncertainties and decreases the reliability. This paper invest...

Free sources such as seawater and solar and wind energy can be converted by interface equipment for different applications. Due to the development of technologies in recent years, such a process has become more feasible. This paper optimizes the scheduling of a renewable energy-water nexus based on multi-hub concept towards achieving sustainability...

A large portion of electricity demand in the world is delivered by microgrids (MGs). Operation of MGs under the uncertainty of demands and renewable power is a hot research area. As per the literature, in operation of MGs under uncertainty, the coordinated operation of MGs, with consideration of both day-ahead (DA) and real-time (RT) stages has not...

Access to the power system information in the shortest time with the highest accuracy has become critical because of changing the system dimension, cyber-physical issues and increasing data points. This paper evaluates the security and observability of distribution systems under two-level modelling consist of power system observability and security...

Renewable energies are extensively utilized in smart grids. Due to the widespread use of information and communication technologies in such networks, their security has become a critical issue. This paper aims to enhance the information security of renewable smart grids under cyber-physical attacks. In this regard, it is assumed that the non-legiti...

Hybrid energy systems are developed recently due to their applicability in small scales. This paper presents a hybrid approach to optimize the operation and handle the uncertainties of a residential energy system composed of photovoltaic, fuel cell, boiler and storage units. In this regard, the uncertain parameters are divided into two categories i...

The vulnerability of power systems has increased in recent years due to cyber-physical attacks. Under such conditions, various targets can be exposed to the attacks of non-legitimate agents. This paper considers physical attacks to the distribution network lines and their switches where the attacker aims to maximize the energy not supplied. These a...

The optimal management of charging stations has become a critical issue in recent years. In this paper, the energy management of a hybrid charging station composed of an electrolyzer, fuel cell and hydrogen storage is analyzed that is integrated with a photovoltaic system. As well, the station is connected to the local power market to increase flex...

Control center of modern power system utilizes state estimation as an important function. In such structures, voltage phasor of buses is known as state variables that should be determined during operation. To specify the optimal operation of all components, an accurate estimation is required. Hence, various mathematical and heuristic methods can be...

With the widespread use of information and communication technologies in smart grids, the vulnerability of these networks has increased significantly. In this paper, the operation of a smart electrical energy system is evaluated by considering the information vulnerability of renewable generators and their sensors. Hence, the false data injection p...

Due to the voltage level and current of feeders in distribution systems, power loss is high in such networks. With the proliferation of distributed generations, it has become more important to determine their location and rating. These goals can be obtained according to different purposes such as improving the voltage profile. Unlike fixed speed wi...

Utilizing renewable generators can solve many critical problems of electrical energy systems such as the finitude of fossil fuels. However, due to the major role of fuel-based generators to supply the load demand in the current networks and investment costs of renewable generators, some issues such as energy losses and greenhouse gasses emission st...

Microgrid is a network that usually includes small generators, storages and local loads. Environmental issues, fossil fuels finitude and economic benefits are three important reasons that cause increasing attention to renewable resources and local generation. In recent years, development of renewable resources in electrical networks has been increa...

Wasted heat from exhaust gas and the other parts of vehicles such as brake discs can be a daily great source of energy for thermoelectric generators. Different features such as cross wind, vehicle speed, heat sink structure, number of brakes during driving and engine operation influence the temperature of exhaust and discs. Thus, measurement of veh...

Energy management in electrical networks is an important issue that is considered by many in recent studies. This problem becomes more important due to the proliferation and development of renewable generators and their uncertain behavior. Global warming, environmental and economic issues are the main reasons of using renewable resources in electri...

Energy management in microgrid has been become an important issue in recent studies. Nowadays, energy management strategies are grown rapidly. In this paper, a new energy management strategy has been proposed for a hybrid microgrid including demand response and internal power market. In this regard, multiple markets configuration is considered in t...

Microgrids mainly use conventional and renewable energy resources at the same time. Conventional energy resources produce environmental pollution and need high cost for operation. In recent years, penetration of renewable resources such as photovoltaic and wind turbine has been rapidly grown in microgrids. Reduction of power losses and pollution ar...

This paper focus on optimal scheduling of microgrid including thermal and electrical loads, renewable energy sources (solar and wind), combined heat and power (CHP), conventional energy sources (boiler and micro turbine), energy storage systems (thermal and electrical storages), and series flexible alternating current transmission system (FACTS) de...

Wasted heat of the exhaust gas in vehicles can be a daily great source for thermoelectric generators. By improving ways of transferring heat and increasing temperature difference between hot and cold side, produced electric power by thermoelectric generators will be increased. Exhaust temperature can be influenced by different criteria such as wind...

This paper focus on optimal scheduling of microgrid based on adaptive neuro-fuzzy inference system including thermal and electrical loads, renewable energy sources (solar and wind), CHP, conventional energy sources (boiler and micro turbine), energy storage systems (thermal and electrical storage), and D-FACTS devices. D-FACTS are included in the l...

برآورده کردن عملکرد صحیح و امنیت تجهیزات در پستهای فشارقوی در حالتهای عملکرد پایدار و گذرا از نکات قابل تعمق در طراحی پست میباشد. سازگاری الکترومغناطیسی زیرمجموعهای از بحث کلان ایمنسازی عملکرد در پست است که قالب مشخص و تعریفشدهای جهت مدیریت بر آن وجود ندارد و تدابیری نیز که در این راستا اعمال گردیدهاند بهصورت موضعی و کلاسه نشده می- باشند. مدیریت سا...

Renewable energy resources are often known as cost-effective and lucrative resources and have been widely developed due to environmental-economic issues. Renewable energy utilization even in small scale (e.g., microgrid networks) has attracted significant attention. Energy management in microgrid can be carried out based on the generating side mana...

Thermoelectric (TE) materials are one of the latest technologies, which have been used to produce electrical energy from thermal loss. Thermoelectric technologies have been applied in different industrial utilities such as electronic devices, means of transportation, etc. Capability of TE in producing electrical energy from thermal loss is signific...