Selahattin KÜÇÜK - Academia.edu (original) (raw)
Papers by Selahattin KÜÇÜK
International Conference on Electrical and Electronics Engineering, Nov 1, 2017
The main objective of this study is to determine the design steps of an industrial plant electric... more The main objective of this study is to determine the design steps of an industrial plant electrical system in the light of energy availability, continuity, safety and economic equipment selection. This study is not only dealing with design steps, but also analyzing alternative solutions with their positive and negative impacts. Steps to be given in the following paragraphs will reduce possible system design delaying, equipment selection and quotation. As it is known, the engineering data and selected configuration during design stage will be used for electrical system cost estimation. The final equipment cost will be obtained after detailed engineering design completion. But differences between estimation and final costs are not so high if a methodology is followed as It is given in this study.
Loads belonging to a bus at an industrial plant mostly constitutes of asynchronous motors. In cas... more Loads belonging to a bus at an industrial plant mostly constitutes of asynchronous motors. In case of a loss at one of the energy sources that these loads are fed from and in case of a necessity for maintenance at a feeder, to have the uninterrupted continuity of the plant the loads shall be fed again from a healthy source. These processes are conducted by the system which is abbreviated as ATS that is the Automatic Transfer System. With the purpose of inspecting the effects of the bus transfer to the motor loads and electrical system SIMULINK toolbox of MATLAB have been used to make the simulation of the electrical system and with this way fast transfer, in phase transfer and transfer related to the residual voltage structures have been investigated. The results have revealed the importance of motor bus amplitude and phase angle resultant vectorial potential values at deciding the bus transfer type and determining the effects to the electrical system.
The purpose of a Load Shedding Control System (LSS) is to prevent a dangerous overloading of the ... more The purpose of a Load Shedding Control System (LSS) is to prevent a dangerous overloading of the generators and/or a general collapse (blackout) of an electric power system due to a generator failure or any contingency which may diminish the capacity of the operational generators below the active power required by the loads. Such a state may create an imbalance in the power supply and thus lead to a frequency decay, voltage collapse and overload on all the power generation units connected to the system. In case the electrical supply is inadequate to meet the demand of the process loads, partial supply to certain areas can be interrupted in order to prevent the failure of the whole electrical system. This process is called load shedding. This is an entirely different concept from a power failure that may occur due to various reasons. Load shedding is an effective method to prevent a total collapse of the electrical supply, which may have a disastrous impact on the continuity of the processes and operations. Unless power imbalances are properly managed, they may cause the entire workflow to collapse until the power to the industrial establishment is restored. The aim of this paper is to discuss the electrical load shedding process of a refinery, which is a heavily loaded industrial establishment, in detail.
The safety at transformers, and electrical substations of the industrial facilities is an extreme... more The safety at transformers, and electrical substations of the industrial facilities is an extremely important aspect of minimizing the plant shutdown periods as well as workers safety. In the event of fire at a substation or transformer there might be casualties even worse, fatalities. Besides, equipment damage could occur. Partial or even complete plant shutdown is required in such cases which means loss of production. Hence, it is critical to install integrated smoke/fire detection systems and Indoor/Outdoor fire fighting systems. In this paper, both national and international standards/regulations have been reviewed and presented in a concise manner.
International Conference on Electrical and Electronics Engineering, Nov 1, 2017
Due to the limited availability of known crude oil reserves, the demand for petroleum products ha... more Due to the limited availability of known crude oil reserves, the demand for petroleum products has shown that high demand for petroleum products is due to a high rate of increase in the petroleum demand emerging economies. In order to meet that demand with less energy consumption and low investment cost together with higher power supply continuity, lots of design criteria has been taken into consideration for the new refinery's electrical system design. The new refinery will meet the increasing demand of diesel consumption of Turkey. Diesel is more economical in Turkey as well as all over the world. The new refinery will process "Fuel Oil" produced in the existing refinery without export additional Crude Oil. Unlike current Refineries, the new Refinery will be mostly operated with electrical energy sources, because electrical equipment is more efficient than steam, except very critical ones. For this purpose, it has been paid special for attention to the selection of the electrical system configuration, the number and type of power supply to the electrical equipment. Such that the design should allow maintaining the continuity and operational flexibility of the system to the highest level and at the same time using less energyconsuming technologies. In this study, electrical system design criteria for intelligent electrical network operating system of the new refinery which is registered as one of the top three European refiners in terms of conversion rate, is evaluated under the engineering point of view.
Istanbul Yeni Yuzyil Universitesi, Yeni Yuzyil Journal of Medical Sciences
İnsanlar suni/yapay ışık kaynaklarının kullanıma girdiği 19. yüzyılın sonlarına kadar tüm yaşamın... more İnsanlar suni/yapay ışık kaynaklarının kullanıma girdiği 19. yüzyılın sonlarına kadar tüm yaşamını güneş’in hareketlerine göre düzenlemiş ve gün içine yaymıştır. Kapalı ortamlarda yaşamını, çalışmalarını, üretimini ise güneş ışığını olabildiğince iç mekânlara taşıyarak gerçekleştirmiştir. Ancak günümüzde insanlar şehirleşmenin ve teknolojinin getirdiği şartlar sonucu güneş ışığının giremediği kapalı alanlarda, bazen tüm gece boyunca zamanlarını geçirmek zorundadırlar. Işığın ulaşamadığı kapalı alanlar ile gece boyunca ihtiyaç nedeniyle gerekli olan suni/yapay ışık kaynakları tarih boyunca zamanla gelişerek özellikle 20. yüzyılda çok önemli bir seviyeye gelmiştir. Hayatımızın vazgeçilmez kaynağı gün ışığının, mevsimlere, gün içinde konumuna göre renk sıcaklığı ve şiddeti sürekli değişirken, yapay ışık kayakları ile sağlanan aydınlatma devrede olduğu sürece sabittir. Var oluşundan itibaren gün ışığına göre biyolojik, psikolojik ve fizyolojik yapısı oluşan insanların, suni ışık kaynakl...
2018 5th International Conference on Electrical and Electronic Engineering (ICEEE)
The purpose of a Load Shedding Control System (LSS) is to prevent a dangerous overloading of the ... more The purpose of a Load Shedding Control System (LSS) is to prevent a dangerous overloading of the generators and/or a general collapse (blackout) of an electric power system due to a generator failure or any contingency which may diminish the capacity of the operational generators below the active power required by the loads. Such a state may create an imbalance in the power supply and thus lead to a frequency decay, voltage collapse and overload on all the power generation units connected to the system. In case the electrical supply is inadequate to meet the demand of the process loads, partial supply to certain areas can be interrupted in order to prevent the failure of the whole electrical system. This process is called load shedding. This is an entirely different concept from a power failure that may occur due to various reasons. Load shedding is an effective method to prevent a total collapse of the electrical supply, which may have a disastrous impact on the continuity of the processes and operations. Unless power imbalances are properly managed, they may cause the entire workflow to collapse until the power to the industrial establishment is restored. The aim of this paper is to discuss the electrical load shedding process of a refinery, which is a heavily loaded industrial establishment, in detail.
2017 4th International Conference on Electrical and Electronic Engineering (ICEEE), 2017
The energy structure is undergoing a very serious change with the connection of renewables from t... more The energy structure is undergoing a very serious change with the connection of renewables from the distribution level. One of these important changes that will ensure the sustainability of energy is the successful implementation of the microgrids. It is very important how the microgrid structure can recover itself from a severe system faults and also how the microgrid structure can maintain the balance itself after becoming an energy island. This decoupling and balancing procedure can sometimes be very critical if there is a load that cannot tolerate energy interruptions. In this paper a successful microgrid structure of a refinery and performed studies are introduced.
Ain Shams Engineering Journal, 2022
2017 10th International Conference on Electrical and Electronics Engineering (ELECO), 2017
Due to the limited availability of known crude oil reserves, the demand for petroleum products ha... more Due to the limited availability of known crude oil reserves, the demand for petroleum products has shown that high demand for petroleum products is due to a high rate of increase in the petroleum demand emerging economies. In order to meet that demand with less energy consumption and low investment cost together with higher power supply continuity, lots of design criteria has been taken into consideration for the new refinery's electrical system design. The new refinery will meet the increasing demand of diesel consumption of Turkey. Diesel is more economical in Turkey as well as all over the world. The new refinery will process “Fuel Oil” produced in the existing refinery without export additional Crude Oil. Unlike current Refineries, the new Refinery will be mostly operated with electrical energy sources, because electrical equipment is more efficient than steam, except very critical ones. For this purpose, it has been paid special for attention to the selection of the electri...
Automatic motor restarting is one of the strategies used in Oil and Gas facilities to minimize pr... more Automatic motor restarting is one of the strategies used in Oil and Gas facilities to minimize production losses after the occurrence of certain power supply disturbances with the purpose of maintaining the industrial process running. Aim of this paper will be to review the strategies for the developing of an Automatic Motor Restarting Scheme, electrical studies required and the different trends for their physical implementation. Case studies with real case applications and lesson learned will be shown. Index Terms Automatic Bus Transfer, Electric motors, Industrial plants, Motor restarting, Motor reacceleration, Substations, Voltage drop/dip,
2020 12th International Conference on Electrical and Electronics Engineering (ELECO), 2020
Lightning is a natural phenomenon that can have major effect on environment, production, and work... more Lightning is a natural phenomenon that can have major effect on environment, production, and workers in the petrochemical industries. Protective and preventative measures are required in order to reduce such effects. Proper lightning protection can provide mitigation of those consequences. In petrochemical industries, large quantities of flammable liquids and gasses are produced and stored in outdoor tanks and process units. These products generate an explosive environment. In presence of an ignition source, an explosion may happen. Lightning can strike storage tanks, process units, or pipes not only directly but also indirectly by causing power surges on the electrical system inside or near these hazardous zones or even penetrating the tanks. In this paper, the implications of the external lightning protection of refineries and petrochemical plants in terms of each type of structure is analyzed as well as on the process and workers safety. International standards, local legislation...
2017 4th International Conference on Electrical and Electronic Engineering (ICEEE), 2017
This paper describes the works and studies made in one Industrial Plant in TURKEY, to upgrade the... more This paper describes the works and studies made in one Industrial Plant in TURKEY, to upgrade the existing 45 MW electrical generation capacity to 85 MW through an interconnection between the existing generation systems and national electrical network. Through this extension major modifications have been made in connection lines between Industrial Plant electrical system and national electrical network and the electrical distribution system in order to restore the system reliability, operational flexibility and equipment maintainability. In this study, main design criteria, power system analyses, two level medium voltage and low voltage distribution system installation, automation, load control of generation, distribution and control room revision during the extension project are reviewed. The aim of this paper to make recommendations based on the learning experiences during the implementation of this project and to assist the reader faced with a similar major industrial plant expan...
2017 10th International Conference on Electrical and Electronics Engineering (ELECO), 2017
The main objective of this study is to determine the design steps of an industrial plant electric... more The main objective of this study is to determine the design steps of an industrial plant electrical system in the light of energy availability, continuity, safety and economic equipment selection. This study is not only dealing with design steps, but also analyzing alternative solutions with their positive and negative impacts. Steps to be given in the following paragraphs will reduce possible system design delaying, equipment selection and quotation. As it is known, the engineering data and selected configuration during design stage will be used for electrical system cost estimation. The final equipment cost will be obtained after detailed engineering design completion. But differences between estimation and final costs are not so high if a methodology is followed as It is given in this study.
2016 International Symposium on Networks, Computers and Communications (ISNCC), 2016
The continuity of electrical energy is the main subject among all others affecting operational su... more The continuity of electrical energy is the main subject among all others affecting operational sustainability in industrial facilities. Therefore electrical system and its extensions shall be controlled, supervised, monitored and protected by intelligent systems. Hence, it is necessary to incorporate into electrical system required resources and hardware that will enhance the safety and sustainability of electrical energy by means of utilizing all available economical and technical means. In this regard; industrial facilities, along getting fed by national grid, install standalone production units too. However, electricity systems involving multiple energy production resources need to be run and controlled by smart systems that do not require technical manpower interference in order to comply with economical constraints, governing laws, regulations, etc. and be able to take prompt and correct decisions. Therefore, electricity systems should be enhanced with necessary prompt intelligent decision-maker and performer subsystems, which will continuously monitor, supervise, control and record electrical system and extensions and ensure system sustainability in case of occurrence significant change in the whole system. This article aims to illustrate all required smart systems that ensure sustainability and safety of electrical energy, complying with governing laws and regulations and an application regarding supporting systems in an industrial facility.
2015 9th International Conference on Electrical and Electronics Engineering (ELECO), 2015
A primary goal of an industrial electric power system is to minimize production losses in industr... more A primary goal of an industrial electric power system is to minimize production losses in industrial facilities maintaining the industrial process running after the occurrence of certain supply disturbances. The automatic motor restarting is one of the strategies used in the industrial facilities, especially in Oil and Gas facilities, in order to achieve this goal. Aim of this strategy is to allow that after a voltage dip or disturbance, the medium voltage and low voltage motors will be automatically reenergized within predetermined time and in a certain order when voltage is restored. These abnormal voltage conditions may be caused by cleared short-circuits upstream, generation and public supply voltage outages or a simple automatic transfer system of a selective secondary substation operation. This paper presents the automatic motor restarting scheme applied at a large oil refinery where more than 600 motors are assigned to automatic restarting. Application criteria for motor restarting, power system simulations and physical implementation of this scheme are discussed in this paper.
Elektronika ir Elektrotechnika, 2015
Photovoltaic (PV) systems produce a significant amount of electrical energy used around the world... more Photovoltaic (PV) systems produce a significant amount of electrical energy used around the world. The performance of a PV array is affected by temperature, solar insolation, shading and array configuration. Obtainable maximum power generation from PV based energy production systems is only possible with Maximum Power Point Tracking (MPPT) methods. In order to maximize the efficiency of PV energy conversion systems, solar panels and arrays should be operated at maximum power points. At maximum power point, solar arrays generate the electric energy at maximum efficiency and minimum losses. This paper discusses the following issues: (1) what is the effect of MPPT unit in PV systems, (2) two connection methods between solar arrays and buck-boost DC/DC converter with MPPT unit, (3) determine behaviours of PV power generation systems in cloudy and sunny conditions.
International Conference on Electrical and Electronics Engineering, Nov 1, 2017
The main objective of this study is to determine the design steps of an industrial plant electric... more The main objective of this study is to determine the design steps of an industrial plant electrical system in the light of energy availability, continuity, safety and economic equipment selection. This study is not only dealing with design steps, but also analyzing alternative solutions with their positive and negative impacts. Steps to be given in the following paragraphs will reduce possible system design delaying, equipment selection and quotation. As it is known, the engineering data and selected configuration during design stage will be used for electrical system cost estimation. The final equipment cost will be obtained after detailed engineering design completion. But differences between estimation and final costs are not so high if a methodology is followed as It is given in this study.
Loads belonging to a bus at an industrial plant mostly constitutes of asynchronous motors. In cas... more Loads belonging to a bus at an industrial plant mostly constitutes of asynchronous motors. In case of a loss at one of the energy sources that these loads are fed from and in case of a necessity for maintenance at a feeder, to have the uninterrupted continuity of the plant the loads shall be fed again from a healthy source. These processes are conducted by the system which is abbreviated as ATS that is the Automatic Transfer System. With the purpose of inspecting the effects of the bus transfer to the motor loads and electrical system SIMULINK toolbox of MATLAB have been used to make the simulation of the electrical system and with this way fast transfer, in phase transfer and transfer related to the residual voltage structures have been investigated. The results have revealed the importance of motor bus amplitude and phase angle resultant vectorial potential values at deciding the bus transfer type and determining the effects to the electrical system.
The purpose of a Load Shedding Control System (LSS) is to prevent a dangerous overloading of the ... more The purpose of a Load Shedding Control System (LSS) is to prevent a dangerous overloading of the generators and/or a general collapse (blackout) of an electric power system due to a generator failure or any contingency which may diminish the capacity of the operational generators below the active power required by the loads. Such a state may create an imbalance in the power supply and thus lead to a frequency decay, voltage collapse and overload on all the power generation units connected to the system. In case the electrical supply is inadequate to meet the demand of the process loads, partial supply to certain areas can be interrupted in order to prevent the failure of the whole electrical system. This process is called load shedding. This is an entirely different concept from a power failure that may occur due to various reasons. Load shedding is an effective method to prevent a total collapse of the electrical supply, which may have a disastrous impact on the continuity of the processes and operations. Unless power imbalances are properly managed, they may cause the entire workflow to collapse until the power to the industrial establishment is restored. The aim of this paper is to discuss the electrical load shedding process of a refinery, which is a heavily loaded industrial establishment, in detail.
The safety at transformers, and electrical substations of the industrial facilities is an extreme... more The safety at transformers, and electrical substations of the industrial facilities is an extremely important aspect of minimizing the plant shutdown periods as well as workers safety. In the event of fire at a substation or transformer there might be casualties even worse, fatalities. Besides, equipment damage could occur. Partial or even complete plant shutdown is required in such cases which means loss of production. Hence, it is critical to install integrated smoke/fire detection systems and Indoor/Outdoor fire fighting systems. In this paper, both national and international standards/regulations have been reviewed and presented in a concise manner.
International Conference on Electrical and Electronics Engineering, Nov 1, 2017
Due to the limited availability of known crude oil reserves, the demand for petroleum products ha... more Due to the limited availability of known crude oil reserves, the demand for petroleum products has shown that high demand for petroleum products is due to a high rate of increase in the petroleum demand emerging economies. In order to meet that demand with less energy consumption and low investment cost together with higher power supply continuity, lots of design criteria has been taken into consideration for the new refinery's electrical system design. The new refinery will meet the increasing demand of diesel consumption of Turkey. Diesel is more economical in Turkey as well as all over the world. The new refinery will process "Fuel Oil" produced in the existing refinery without export additional Crude Oil. Unlike current Refineries, the new Refinery will be mostly operated with electrical energy sources, because electrical equipment is more efficient than steam, except very critical ones. For this purpose, it has been paid special for attention to the selection of the electrical system configuration, the number and type of power supply to the electrical equipment. Such that the design should allow maintaining the continuity and operational flexibility of the system to the highest level and at the same time using less energyconsuming technologies. In this study, electrical system design criteria for intelligent electrical network operating system of the new refinery which is registered as one of the top three European refiners in terms of conversion rate, is evaluated under the engineering point of view.
Istanbul Yeni Yuzyil Universitesi, Yeni Yuzyil Journal of Medical Sciences
İnsanlar suni/yapay ışık kaynaklarının kullanıma girdiği 19. yüzyılın sonlarına kadar tüm yaşamın... more İnsanlar suni/yapay ışık kaynaklarının kullanıma girdiği 19. yüzyılın sonlarına kadar tüm yaşamını güneş’in hareketlerine göre düzenlemiş ve gün içine yaymıştır. Kapalı ortamlarda yaşamını, çalışmalarını, üretimini ise güneş ışığını olabildiğince iç mekânlara taşıyarak gerçekleştirmiştir. Ancak günümüzde insanlar şehirleşmenin ve teknolojinin getirdiği şartlar sonucu güneş ışığının giremediği kapalı alanlarda, bazen tüm gece boyunca zamanlarını geçirmek zorundadırlar. Işığın ulaşamadığı kapalı alanlar ile gece boyunca ihtiyaç nedeniyle gerekli olan suni/yapay ışık kaynakları tarih boyunca zamanla gelişerek özellikle 20. yüzyılda çok önemli bir seviyeye gelmiştir. Hayatımızın vazgeçilmez kaynağı gün ışığının, mevsimlere, gün içinde konumuna göre renk sıcaklığı ve şiddeti sürekli değişirken, yapay ışık kayakları ile sağlanan aydınlatma devrede olduğu sürece sabittir. Var oluşundan itibaren gün ışığına göre biyolojik, psikolojik ve fizyolojik yapısı oluşan insanların, suni ışık kaynakl...
2018 5th International Conference on Electrical and Electronic Engineering (ICEEE)
The purpose of a Load Shedding Control System (LSS) is to prevent a dangerous overloading of the ... more The purpose of a Load Shedding Control System (LSS) is to prevent a dangerous overloading of the generators and/or a general collapse (blackout) of an electric power system due to a generator failure or any contingency which may diminish the capacity of the operational generators below the active power required by the loads. Such a state may create an imbalance in the power supply and thus lead to a frequency decay, voltage collapse and overload on all the power generation units connected to the system. In case the electrical supply is inadequate to meet the demand of the process loads, partial supply to certain areas can be interrupted in order to prevent the failure of the whole electrical system. This process is called load shedding. This is an entirely different concept from a power failure that may occur due to various reasons. Load shedding is an effective method to prevent a total collapse of the electrical supply, which may have a disastrous impact on the continuity of the processes and operations. Unless power imbalances are properly managed, they may cause the entire workflow to collapse until the power to the industrial establishment is restored. The aim of this paper is to discuss the electrical load shedding process of a refinery, which is a heavily loaded industrial establishment, in detail.
2017 4th International Conference on Electrical and Electronic Engineering (ICEEE), 2017
The energy structure is undergoing a very serious change with the connection of renewables from t... more The energy structure is undergoing a very serious change with the connection of renewables from the distribution level. One of these important changes that will ensure the sustainability of energy is the successful implementation of the microgrids. It is very important how the microgrid structure can recover itself from a severe system faults and also how the microgrid structure can maintain the balance itself after becoming an energy island. This decoupling and balancing procedure can sometimes be very critical if there is a load that cannot tolerate energy interruptions. In this paper a successful microgrid structure of a refinery and performed studies are introduced.
Ain Shams Engineering Journal, 2022
2017 10th International Conference on Electrical and Electronics Engineering (ELECO), 2017
Due to the limited availability of known crude oil reserves, the demand for petroleum products ha... more Due to the limited availability of known crude oil reserves, the demand for petroleum products has shown that high demand for petroleum products is due to a high rate of increase in the petroleum demand emerging economies. In order to meet that demand with less energy consumption and low investment cost together with higher power supply continuity, lots of design criteria has been taken into consideration for the new refinery's electrical system design. The new refinery will meet the increasing demand of diesel consumption of Turkey. Diesel is more economical in Turkey as well as all over the world. The new refinery will process “Fuel Oil” produced in the existing refinery without export additional Crude Oil. Unlike current Refineries, the new Refinery will be mostly operated with electrical energy sources, because electrical equipment is more efficient than steam, except very critical ones. For this purpose, it has been paid special for attention to the selection of the electri...
Automatic motor restarting is one of the strategies used in Oil and Gas facilities to minimize pr... more Automatic motor restarting is one of the strategies used in Oil and Gas facilities to minimize production losses after the occurrence of certain power supply disturbances with the purpose of maintaining the industrial process running. Aim of this paper will be to review the strategies for the developing of an Automatic Motor Restarting Scheme, electrical studies required and the different trends for their physical implementation. Case studies with real case applications and lesson learned will be shown. Index Terms Automatic Bus Transfer, Electric motors, Industrial plants, Motor restarting, Motor reacceleration, Substations, Voltage drop/dip,
2020 12th International Conference on Electrical and Electronics Engineering (ELECO), 2020
Lightning is a natural phenomenon that can have major effect on environment, production, and work... more Lightning is a natural phenomenon that can have major effect on environment, production, and workers in the petrochemical industries. Protective and preventative measures are required in order to reduce such effects. Proper lightning protection can provide mitigation of those consequences. In petrochemical industries, large quantities of flammable liquids and gasses are produced and stored in outdoor tanks and process units. These products generate an explosive environment. In presence of an ignition source, an explosion may happen. Lightning can strike storage tanks, process units, or pipes not only directly but also indirectly by causing power surges on the electrical system inside or near these hazardous zones or even penetrating the tanks. In this paper, the implications of the external lightning protection of refineries and petrochemical plants in terms of each type of structure is analyzed as well as on the process and workers safety. International standards, local legislation...
2017 4th International Conference on Electrical and Electronic Engineering (ICEEE), 2017
This paper describes the works and studies made in one Industrial Plant in TURKEY, to upgrade the... more This paper describes the works and studies made in one Industrial Plant in TURKEY, to upgrade the existing 45 MW electrical generation capacity to 85 MW through an interconnection between the existing generation systems and national electrical network. Through this extension major modifications have been made in connection lines between Industrial Plant electrical system and national electrical network and the electrical distribution system in order to restore the system reliability, operational flexibility and equipment maintainability. In this study, main design criteria, power system analyses, two level medium voltage and low voltage distribution system installation, automation, load control of generation, distribution and control room revision during the extension project are reviewed. The aim of this paper to make recommendations based on the learning experiences during the implementation of this project and to assist the reader faced with a similar major industrial plant expan...
2017 10th International Conference on Electrical and Electronics Engineering (ELECO), 2017
The main objective of this study is to determine the design steps of an industrial plant electric... more The main objective of this study is to determine the design steps of an industrial plant electrical system in the light of energy availability, continuity, safety and economic equipment selection. This study is not only dealing with design steps, but also analyzing alternative solutions with their positive and negative impacts. Steps to be given in the following paragraphs will reduce possible system design delaying, equipment selection and quotation. As it is known, the engineering data and selected configuration during design stage will be used for electrical system cost estimation. The final equipment cost will be obtained after detailed engineering design completion. But differences between estimation and final costs are not so high if a methodology is followed as It is given in this study.
2016 International Symposium on Networks, Computers and Communications (ISNCC), 2016
The continuity of electrical energy is the main subject among all others affecting operational su... more The continuity of electrical energy is the main subject among all others affecting operational sustainability in industrial facilities. Therefore electrical system and its extensions shall be controlled, supervised, monitored and protected by intelligent systems. Hence, it is necessary to incorporate into electrical system required resources and hardware that will enhance the safety and sustainability of electrical energy by means of utilizing all available economical and technical means. In this regard; industrial facilities, along getting fed by national grid, install standalone production units too. However, electricity systems involving multiple energy production resources need to be run and controlled by smart systems that do not require technical manpower interference in order to comply with economical constraints, governing laws, regulations, etc. and be able to take prompt and correct decisions. Therefore, electricity systems should be enhanced with necessary prompt intelligent decision-maker and performer subsystems, which will continuously monitor, supervise, control and record electrical system and extensions and ensure system sustainability in case of occurrence significant change in the whole system. This article aims to illustrate all required smart systems that ensure sustainability and safety of electrical energy, complying with governing laws and regulations and an application regarding supporting systems in an industrial facility.
2015 9th International Conference on Electrical and Electronics Engineering (ELECO), 2015
A primary goal of an industrial electric power system is to minimize production losses in industr... more A primary goal of an industrial electric power system is to minimize production losses in industrial facilities maintaining the industrial process running after the occurrence of certain supply disturbances. The automatic motor restarting is one of the strategies used in the industrial facilities, especially in Oil and Gas facilities, in order to achieve this goal. Aim of this strategy is to allow that after a voltage dip or disturbance, the medium voltage and low voltage motors will be automatically reenergized within predetermined time and in a certain order when voltage is restored. These abnormal voltage conditions may be caused by cleared short-circuits upstream, generation and public supply voltage outages or a simple automatic transfer system of a selective secondary substation operation. This paper presents the automatic motor restarting scheme applied at a large oil refinery where more than 600 motors are assigned to automatic restarting. Application criteria for motor restarting, power system simulations and physical implementation of this scheme are discussed in this paper.
Elektronika ir Elektrotechnika, 2015
Photovoltaic (PV) systems produce a significant amount of electrical energy used around the world... more Photovoltaic (PV) systems produce a significant amount of electrical energy used around the world. The performance of a PV array is affected by temperature, solar insolation, shading and array configuration. Obtainable maximum power generation from PV based energy production systems is only possible with Maximum Power Point Tracking (MPPT) methods. In order to maximize the efficiency of PV energy conversion systems, solar panels and arrays should be operated at maximum power points. At maximum power point, solar arrays generate the electric energy at maximum efficiency and minimum losses. This paper discusses the following issues: (1) what is the effect of MPPT unit in PV systems, (2) two connection methods between solar arrays and buck-boost DC/DC converter with MPPT unit, (3) determine behaviours of PV power generation systems in cloudy and sunny conditions.