Pub Date : 2013-11-01DOI: 10.1109/IEEEGCC.2013.6705777
H. Khader, A. Massoud, A. Gastli
Recently voltage source converter-based HVDC technology has witnessed a remarkable development due to the several advantages it exhibits over the conventional HVDC systems. However, one of the main remaining challenges is the behavior of the system under DC side faults where the VSC protection is a priority. In this paper, the effect of changing the inductance in the AC side and the capacitance in the DC side of the voltage source converter on the converter DC current during fault is investigated. A 500MW/400kV HVDC system is simulated using Matlab/Simulink. Results showed that both capacitance and inductance values have a significant effect on the intensity and timing of the DC current flowing from the AC side to the DC side through the converter freewheeling diodes. Increasing the capacitance increases the blocking time of this current while high inductances decrease its amplitude. However, it is not possible to increase indefinitely the values of the capacitance and inductance where an appropriate compromise must be attained during the design of the system.
{"title":"Study of voltage source converter-based HVDC system during DC side faults","authors":"H. Khader, A. Massoud, A. Gastli","doi":"10.1109/IEEEGCC.2013.6705777","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705777","url":null,"abstract":"Recently voltage source converter-based HVDC technology has witnessed a remarkable development due to the several advantages it exhibits over the conventional HVDC systems. However, one of the main remaining challenges is the behavior of the system under DC side faults where the VSC protection is a priority. In this paper, the effect of changing the inductance in the AC side and the capacitance in the DC side of the voltage source converter on the converter DC current during fault is investigated. A 500MW/400kV HVDC system is simulated using Matlab/Simulink. Results showed that both capacitance and inductance values have a significant effect on the intensity and timing of the DC current flowing from the AC side to the DC side through the converter freewheeling diodes. Increasing the capacitance increases the blocking time of this current while high inductances decrease its amplitude. However, it is not possible to increase indefinitely the values of the capacitance and inductance where an appropriate compromise must be attained during the design of the system.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122782688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-11-01DOI: 10.1109/IEEEGCC.2013.6705809
A. Darwish, A. Elserougi, A. Abdel-Khalik, S. Ahmed, A. Massoud, D. Holliday, B. Williams
This paper presents a new three-phase dc-ac inverter based on the basic Cuk converter. The main feature of the proposed topology is the fact that the energy storage elements as inductors and capacitors values can be reduced in order to improve the reliability, reduce the size, and the total cost. Moreover, the bucking-boosting inherent nature of the Cuk converter, depending on the time-varying duty ratios, provides more flexibility for stand-alone and grid connected applications when the required output AC voltage is lower or greater than the DC side voltage. This property is not found in the conventional current source inverter (CSI) when the DC input current is always greater than the ac output one or in the conventional voltage source inverter (VSI) as the output ac voltage is always lower than the dc input one. Averaged large and small signal models are used to study the Cuk nonlinear operation. Basic structure, control design, and MATLAB/SIMULINK results are presented in this paper. The new three-phase DC-AC inverter is very convenient for PV applications where continuous average input currents are required for appropriate Maximum power Point Tracking (MPPT) operations.
{"title":"A single-stage three-phase DC/AC inverter based on Cuk converter for PV application","authors":"A. Darwish, A. Elserougi, A. Abdel-Khalik, S. Ahmed, A. Massoud, D. Holliday, B. Williams","doi":"10.1109/IEEEGCC.2013.6705809","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705809","url":null,"abstract":"This paper presents a new three-phase dc-ac inverter based on the basic Cuk converter. The main feature of the proposed topology is the fact that the energy storage elements as inductors and capacitors values can be reduced in order to improve the reliability, reduce the size, and the total cost. Moreover, the bucking-boosting inherent nature of the Cuk converter, depending on the time-varying duty ratios, provides more flexibility for stand-alone and grid connected applications when the required output AC voltage is lower or greater than the DC side voltage. This property is not found in the conventional current source inverter (CSI) when the DC input current is always greater than the ac output one or in the conventional voltage source inverter (VSI) as the output ac voltage is always lower than the dc input one. Averaged large and small signal models are used to study the Cuk nonlinear operation. Basic structure, control design, and MATLAB/SIMULINK results are presented in this paper. The new three-phase DC-AC inverter is very convenient for PV applications where continuous average input currents are required for appropriate Maximum power Point Tracking (MPPT) operations.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123577946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-11-01DOI: 10.1109/IEEEGCC.2013.6705766
M. Masoud, R. Al Abri
This paper introduces multiphase PWM current source rectifier (CSR). This rectifier is suitable for wind energy or micro turbine applications which have multiphase generators with no need for electric gear such as low frequency transformer. As a case study, medium voltage (MV) five-phase PWM current source rectifier (CSR) with controlled dc-link current is introduced. MATLAB/SIMULINK platform is used as a simulation tool.
{"title":"Five-phase PWM current source rectifier","authors":"M. Masoud, R. Al Abri","doi":"10.1109/IEEEGCC.2013.6705766","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705766","url":null,"abstract":"This paper introduces multiphase PWM current source rectifier (CSR). This rectifier is suitable for wind energy or micro turbine applications which have multiphase generators with no need for electric gear such as low frequency transformer. As a case study, medium voltage (MV) five-phase PWM current source rectifier (CSR) with controlled dc-link current is introduced. MATLAB/SIMULINK platform is used as a simulation tool.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127369286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-11-01DOI: 10.1109/IEEEGCC.2013.6705825
A. Nasir, M. Z. Shakir, K. Qaraqe, E. Serpedin
Recent growth in wireless devices such as smart phones, tablet computers, ipads and other electronic devices made the use of radio frequency spectrum omnipresent. The widespread of wireless devices has raised health concerns due to the possible malign effects of electromagnetic radiations on the human body, and especially on the brain due to its proximity with the hand-held radio devices. These radiations are absorbed in the head while making phone calls and increase the health risks. The rate at which these radiations are absorbed in the head is referred to as specific absorption rate (SAR) and is dependent on the strength of the transmitted signals. This paper investigates a new design for future generations of wireless networks where low-power, low-cost and small-cell base stations are deployed to support the infrastructure of macrocell base stations. The resulting network is referred to as heterogeneous network (HetNet). HetNets are considered as a promising solution for situations when the mobile users have to adapt very fast their uplink transmit power over the fading channels. HetNet reduces the distance between the mobile users and the corresponding small-cell base stations. Therefore, the mobile users are no longer in need to transmit with maximum power to maintain the desired signal to interference noise ratio (SINR) and thereby the transmit power is reduced considerably especially when the mobile users are located far away form the desired base station, i.e., around the edge of the cell. Several simulations are provided to illustrate the reduction in the signal absorption rate (SAR) due to the uplink power adaptation. It is also shown that the other traditional gains such as spectral and energy efficiency of the system under consideration are significantly outperformed in comparison with the existing macrocell network.
{"title":"On the reduction in specific absorption rate using uplink power adaptation in heterogeneous small-cell networks","authors":"A. Nasir, M. Z. Shakir, K. Qaraqe, E. Serpedin","doi":"10.1109/IEEEGCC.2013.6705825","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705825","url":null,"abstract":"Recent growth in wireless devices such as smart phones, tablet computers, ipads and other electronic devices made the use of radio frequency spectrum omnipresent. The widespread of wireless devices has raised health concerns due to the possible malign effects of electromagnetic radiations on the human body, and especially on the brain due to its proximity with the hand-held radio devices. These radiations are absorbed in the head while making phone calls and increase the health risks. The rate at which these radiations are absorbed in the head is referred to as specific absorption rate (SAR) and is dependent on the strength of the transmitted signals. This paper investigates a new design for future generations of wireless networks where low-power, low-cost and small-cell base stations are deployed to support the infrastructure of macrocell base stations. The resulting network is referred to as heterogeneous network (HetNet). HetNets are considered as a promising solution for situations when the mobile users have to adapt very fast their uplink transmit power over the fading channels. HetNet reduces the distance between the mobile users and the corresponding small-cell base stations. Therefore, the mobile users are no longer in need to transmit with maximum power to maintain the desired signal to interference noise ratio (SINR) and thereby the transmit power is reduced considerably especially when the mobile users are located far away form the desired base station, i.e., around the edge of the cell. Several simulations are provided to illustrate the reduction in the signal absorption rate (SAR) due to the uplink power adaptation. It is also shown that the other traditional gains such as spectral and energy efficiency of the system under consideration are significantly outperformed in comparison with the existing macrocell network.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128534489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-11-01DOI: 10.1109/IEEEGCC.2013.6705747
Mohammed H. Albadi, A. S. Al Hinai, A. Al-Badi, M. A. Al Riyami, S. Al Hinai, R. Al Abri
This paper presents a case study about the impacts of industrial loads on power quality. A review of harmonics causes, negative impacts, mitigation techniques, quantification indices and limits are presented. Moreover, harmonics measurements at three grid station that supply the three main industrial areas located in the Main Interconnected System (MIS) of Oman are conducted. Measurement results are compared with limits specified by national and international standards.
{"title":"Measurements and evaluation of harmonics in HV networks — Oman MIS case study","authors":"Mohammed H. Albadi, A. S. Al Hinai, A. Al-Badi, M. A. Al Riyami, S. Al Hinai, R. Al Abri","doi":"10.1109/IEEEGCC.2013.6705747","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705747","url":null,"abstract":"This paper presents a case study about the impacts of industrial loads on power quality. A review of harmonics causes, negative impacts, mitigation techniques, quantification indices and limits are presented. Moreover, harmonics measurements at three grid station that supply the three main industrial areas located in the Main Interconnected System (MIS) of Oman are conducted. Measurement results are compared with limits specified by national and international standards.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121838021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-11-01DOI: 10.1109/IEEEGCC.2013.6705744
A. Gaouda, K. Shuaib, M. Abdel-Hafez, N. Aljuhaishi, M. Alahmad, H. Sharif
This paper focuses on the development of a platform for energy conservation using real-time monitoring and feedback tools. These tools are used to engage users in a university setting to conserve energy. One of the buildings at the United Arab Emirates University (UAEU), campus in Al-Ain will serve as a foundation for research and as a catalyst for an effort to encourage users to save energy. Real-time monitoring equipment and visual and digital feedback tools will be evaluated and deployed at the building to study human behavior as a result of feedback information and to analyze possible energy savings due to impulse behaviors.
{"title":"Conserving energy in UAE buildings: Demand side management and methods for experiencing energy","authors":"A. Gaouda, K. Shuaib, M. Abdel-Hafez, N. Aljuhaishi, M. Alahmad, H. Sharif","doi":"10.1109/IEEEGCC.2013.6705744","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705744","url":null,"abstract":"This paper focuses on the development of a platform for energy conservation using real-time monitoring and feedback tools. These tools are used to engage users in a university setting to conserve energy. One of the buildings at the United Arab Emirates University (UAEU), campus in Al-Ain will serve as a foundation for research and as a catalyst for an effort to encourage users to save energy. Real-time monitoring equipment and visual and digital feedback tools will be evaluated and deployed at the building to study human behavior as a result of feedback information and to analyze possible energy savings due to impulse behaviors.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125725403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-11-01DOI: 10.1109/IEEEGCC.2013.6705743
S. Al-Yahyai, Y. Charabi, A. Gastli
The main objective of this study is to conduct an optimal micro-siting of 1kW wind turbine to provide electricity for the eco-house project at Sultan Qaboos University (SQU). The study utilizes the Numerical Weather Prediction models data to provide the required wind information. WAsP application is used to calculate the wind climatology and the annual energy production. It was found the closest potential site can generate 1.945MW at 10m and 2.938MW at 30m above the ground. On the other hand, the farthest potential site which is around 45m away from the eco-house can generate 1.449MW and 3.150MW at 10m and 30m above the ground respectively.
{"title":"Optimal micro-siting of small wind turbine using numerical simulation","authors":"S. Al-Yahyai, Y. Charabi, A. Gastli","doi":"10.1109/IEEEGCC.2013.6705743","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705743","url":null,"abstract":"The main objective of this study is to conduct an optimal micro-siting of 1kW wind turbine to provide electricity for the eco-house project at Sultan Qaboos University (SQU). The study utilizes the Numerical Weather Prediction models data to provide the required wind information. WAsP application is used to calculate the wind climatology and the annual energy production. It was found the closest potential site can generate 1.945MW at 10m and 2.938MW at 30m above the ground. On the other hand, the farthest potential site which is around 45m away from the eco-house can generate 1.449MW and 3.150MW at 10m and 30m above the ground respectively.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129378306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-11-01DOI: 10.1109/IEEEGCC.2013.6705764
R. Pragale, J. Reyes
Power quality in an onshore oil field is critical to continuous operation. Poor power quality can lead to equipment misoperation, premature failures, and process disruptions. These are undesired since they result in downtime. The authors realized there are separate power quality issues in the oil field's 60 Hz system and the 0-60 Hz system (variable output of well VFD to the down hole submersible motor). The 60 Hz system issues include: (1) elevated harmonic distortion at distribution substations, (2) elevated voltage distortion at the point-of-common coupling (PCC), and (3) high voltage and current distortion at the well VFD input. The 0-60 Hz system exhibits elevated peak voltages at the output of the VFD putting stress on the step-up transformer, down hole cables and submersible well motor.
{"title":"Understanding oil field power quality issues","authors":"R. Pragale, J. Reyes","doi":"10.1109/IEEEGCC.2013.6705764","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705764","url":null,"abstract":"Power quality in an onshore oil field is critical to continuous operation. Poor power quality can lead to equipment misoperation, premature failures, and process disruptions. These are undesired since they result in downtime. The authors realized there are separate power quality issues in the oil field's 60 Hz system and the 0-60 Hz system (variable output of well VFD to the down hole submersible motor). The 60 Hz system issues include: (1) elevated harmonic distortion at distribution substations, (2) elevated voltage distortion at the point-of-common coupling (PCC), and (3) high voltage and current distortion at the well VFD input. The 0-60 Hz system exhibits elevated peak voltages at the output of the VFD putting stress on the step-up transformer, down hole cables and submersible well motor.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133484343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-11-01DOI: 10.1109/IEEEGCC.2013.6705748
A. Elserougi, A. Massoud, A. Abdel-Khalik, S. Ahmed
In photovoltaic-fed applications, boosting the limited output voltage is very essential. Single-stage boost inverters can efficiently be used to interface renewable energy sources. In this paper, different topologies for the boost inverter, namely, (Interleaved, Cascaded, and Hybrid-Cascaded) are proposed with recommended applications for each type. Simulation results elucidate the proposed concepts.
{"title":"New topologies for photovoltaic-fed single-stage boost inverters","authors":"A. Elserougi, A. Massoud, A. Abdel-Khalik, S. Ahmed","doi":"10.1109/IEEEGCC.2013.6705748","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705748","url":null,"abstract":"In photovoltaic-fed applications, boosting the limited output voltage is very essential. Single-stage boost inverters can efficiently be used to interface renewable energy sources. In this paper, different topologies for the boost inverter, namely, (Interleaved, Cascaded, and Hybrid-Cascaded) are proposed with recommended applications for each type. Simulation results elucidate the proposed concepts.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130512810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-11-01DOI: 10.1109/IEEEGCC.2013.6705745
A. Al‐Sumaiti
This paper economically evaluates the investments in renewable energy projects in developing countries under their regulation from an investor's point of view. The selection of the best renewable energy investment is to be made under regulation considering incremental analysis of the projects. Solar PV, solar thermal, wind and hydro power projects are chosen to be under study.
{"title":"The role of regulation in the economic evaluation of renewable energy investments in developing countries","authors":"A. Al‐Sumaiti","doi":"10.1109/IEEEGCC.2013.6705745","DOIUrl":"https://doi.org/10.1109/IEEEGCC.2013.6705745","url":null,"abstract":"This paper economically evaluates the investments in renewable energy projects in developing countries under their regulation from an investor's point of view. The selection of the best renewable energy investment is to be made under regulation considering incremental analysis of the projects. Solar PV, solar thermal, wind and hydro power projects are chosen to be under study.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134458065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：