Pub Date : 2012-12-01DOI: 10.5923/J.IJEE.20120206.06
M. J. Cameron, R. Rossouw
With the rapid and sharp rise in energy prices in South Africa, the cost of energy is becoming a factor that cannot be ignored in either energy-intensive or -dependent industries. In the energy-intensive industries, for examp le, this immed iate and direct perspective can result in the incurring of costs that are greatly magnified by the large amount of power consumed. Few would therefore deny the importance of electricity as an essential input to production and to economic activity in general. Based on the fact that changes in electricity prices impact on basically each and every individual in South Africa, and mo re specifically on an energy utility provider's core business, it is important to determine its effect on each of these entities. The develop ment of an analytical Cost of Production Tipping Po int (CoPTP) model, combined with the economy-wide modelling capabilit ies of an Applied General Equilib riu m (A GE) model for South Africa, will help to determine what the potential impact would be, given the market forces at play at any particular instance. The aim of this paper is therefore to help develop an understanding of the impact of increasing electricity prices on an energy utility provider's main assets - its customers, by determining the broader potential economic impact on the South African economy. The value of this framewo rk is therefore that it will provide strategic context, will allow for a better understanding of the influence of electricity price increases on both energy-intensive and -dependent industries, while also informing key stakeholders regard ing imp lications of potential changes in customer operational environ ments to an energy utility provider in terms of potential revenue risk implications, as well as to the rest of industry and the broader market in South Africa due to potential second round feedback effects.
{"title":"Modelling the Economic Impact of Electricity Tariff Increases on Eskom’s Top Customer Segment","authors":"M. J. Cameron, R. Rossouw","doi":"10.5923/J.IJEE.20120206.06","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120206.06","url":null,"abstract":"With the rapid and sharp rise in energy prices in South Africa, the cost of energy is becoming a factor that cannot be ignored in either energy-intensive or -dependent industries. In the energy-intensive industries, for examp le, this immed iate and direct perspective can result in the incurring of costs that are greatly magnified by the large amount of power consumed. Few would therefore deny the importance of electricity as an essential input to production and to economic activity in general. Based on the fact that changes in electricity prices impact on basically each and every individual in South Africa, and mo re specifically on an energy utility provider's core business, it is important to determine its effect on each of these entities. The develop ment of an analytical Cost of Production Tipping Po int (CoPTP) model, combined with the economy-wide modelling capabilit ies of an Applied General Equilib riu m (A GE) model for South Africa, will help to determine what the potential impact would be, given the market forces at play at any particular instance. The aim of this paper is therefore to help develop an understanding of the impact of increasing electricity prices on an energy utility provider's main assets - its customers, by determining the broader potential economic impact on the South African economy. The value of this framewo rk is therefore that it will provide strategic context, will allow for a better understanding of the influence of electricity price increases on both energy-intensive and -dependent industries, while also informing key stakeholders regard ing imp lications of potential changes in customer operational environ ments to an energy utility provider in terms of potential revenue risk implications, as well as to the rest of industry and the broader market in South Africa due to potential second round feedback effects.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81541092","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 : 2012-12-01DOI: 10.5923/J.IJEE.20120205.05
U. Mammadova
Appreciation of the innate resources in preserve serves biogeocenosis further protection concerning to woodland area. The major reserve is the solar energy potential to supply the energy demand of the population. Alternation of fuelwood into the renewable energy source is the ideal way of saving woodlands. That’s why the total solar energy potential was determined in the region. Finally on the conclusions the solar energy potential map has been established.
{"title":"Natural Resources Ecological Monitoring in Pirgulu State Nature Preserve","authors":"U. Mammadova","doi":"10.5923/J.IJEE.20120205.05","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120205.05","url":null,"abstract":"Appreciation of the innate resources in preserve serves biogeocenosis further protection concerning to woodland area. The major reserve is the solar energy potential to supply the energy demand of the population. Alternation of fuelwood into the renewable energy source is the ideal way of saving woodlands. That’s why the total solar energy potential was determined in the region. Finally on the conclusions the solar energy potential map has been established.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81409306","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 : 2012-12-01DOI: 10.5923/J.IJEE.20120206.01
M. Mustafa, S. Abdelhady, A. Elweteedy
The city of Aswan, located at the south of Egypt, is characterized by a very high level of solar density. The Solar Power Plant (SPT) technology using the Concentrated Solar Power Plant (CSP) is expected to soon enter the renewable energy field in Egypt. Fortunately, considerable amount of informat ion about the PS10, which is a co mmercial SPT of power 11 MW are availab le for performing considerable attractive analysis . A co mparative performance analysis is developed between the existing PS10 in Sanlucar la Mayor- Spain, and a modified one of similar specifications located in Aswan. In this study, the PS10 So lar Po wer Tower systems (SPT) design-layout is revised to suit the solar data in Aswan. Accordingly, the location of each heliostat is reviewed, analysed and modified. The solar irradiance model and sunshine duration (solar hours) of the existing plant in Spain are co mpared to those in Aswan. The study includes optical and geometric analysis of both SPTs. The annual average efficiency and SPT performance values in the existing and intended power stations are compared. Su itable mod ifications are introduced in the SP10 to fit the conditions in Aswan according to the innovated field of the heliostats. The main objective of this study is to find the relative advantage of installation of the CSPs in Aswan compared to the other locations in the world. The innovated model of PS10 in Aswan is believed to be more pro mising than that of the original one in Spain.
阿斯旺市位于埃及南部，其特点是太阳密度非常高。利用聚光太阳能发电厂(CSP)的太阳能发电厂(SPT)技术有望很快进入埃及的可再生能源领域。幸运的是，关于功率为11兆瓦的商用SPT PS10的大量信息可供进行相当有吸引力的分析。在西班牙Sanlucar la Mayor的现有PS10和位于阿斯旺的类似规格的改进版PS10之间进行了比较性能分析。在本研究中，PS10大型太阳能发电塔系统(SPT)的设计布局进行了修改，以适应阿斯旺的太阳能数据。据此，对每个定日镜的位置进行审查、分析和修改。西班牙现有工厂的太阳辐照度模型和日照时数(太阳小时)与阿斯旺的工厂进行了比较。该研究包括两个spt的光学和几何分析。比较了现有和拟建电站的年平均效率和SPT性能值。SP10根据定日镜的特点进行了适当的改装，以适应阿斯旺地区的实际情况。本研究的主要目的是找到与世界其他地区相比，在阿斯旺安装csp的相对优势。据分析，在阿斯旺推出的改良版PS10比在西班牙推出的原版更有前景。
{"title":"Analytical Study of an Innovated Solar Power Tower (PS10) in Aswan","authors":"M. Mustafa, S. Abdelhady, A. Elweteedy","doi":"10.5923/J.IJEE.20120206.01","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120206.01","url":null,"abstract":"The city of Aswan, located at the south of Egypt, is characterized by a very high level of solar density. The Solar Power Plant (SPT) technology using the Concentrated Solar Power Plant (CSP) is expected to soon enter the renewable energy field in Egypt. Fortunately, considerable amount of informat ion about the PS10, which is a co mmercial SPT of power 11 MW are availab le for performing considerable attractive analysis . A co mparative performance analysis is developed between the existing PS10 in Sanlucar la Mayor- Spain, and a modified one of similar specifications located in Aswan. In this study, the PS10 So lar Po wer Tower systems (SPT) design-layout is revised to suit the solar data in Aswan. Accordingly, the location of each heliostat is reviewed, analysed and modified. The solar irradiance model and sunshine duration (solar hours) of the existing plant in Spain are co mpared to those in Aswan. The study includes optical and geometric analysis of both SPTs. The annual average efficiency and SPT performance values in the existing and intended power stations are compared. Su itable mod ifications are introduced in the SP10 to fit the conditions in Aswan according to the innovated field of the heliostats. The main objective of this study is to find the relative advantage of installation of the CSPs in Aswan compared to the other locations in the world. The innovated model of PS10 in Aswan is believed to be more pro mising than that of the original one in Spain.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75065245","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 : 2012-12-01DOI: 10.5923/J.IJEE.20120205.06
R. Owolabi, A. Adejumo, A. Aderibigbe
Several attempts have been made by researchers across the globe to counter the effects of the growing informat ion related to the finite nature of the present fossil fuel reserve and the associated hazards. Biofuel has gained global popularity in this respect as a biomass based fuel that have been tipped as a timely candidate. This review strictly focuses on biodiesel of all b io mass derived biofuel.The major feedstock and their supply lines in a b id to create a balance between food and energy was considered. Various catalyst used including biocatalyst for the simp le trans-esterification react ion of the feedstock (Vegetable/Used Oil; Edible/Inedib le Oil and Alcohol) were analyzed. In fluence of the feedstock mo lar rat io, temperature and t ime of the reaction on the conversion/yield and product purity and quality were equally reviewed. The thermo -kinetics of the biodiesel production, fuel properties of biodiesel and the trials subjected to biodiesel in terms of workab ility were considered for review in th is paper.
{"title":"Biodiesel: Fuel for the Future (A Brief Review)","authors":"R. Owolabi, A. Adejumo, A. Aderibigbe","doi":"10.5923/J.IJEE.20120205.06","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120205.06","url":null,"abstract":"Several attempts have been made by researchers across the globe to counter the effects of the growing informat ion related to the finite nature of the present fossil fuel reserve and the associated hazards. Biofuel has gained global popularity in this respect as a biomass based fuel that have been tipped as a timely candidate. This review strictly focuses on biodiesel of all b io mass derived biofuel.The major feedstock and their supply lines in a b id to create a balance between food and energy was considered. Various catalyst used including biocatalyst for the simp le trans-esterification react ion of the feedstock (Vegetable/Used Oil; Edible/Inedib le Oil and Alcohol) were analyzed. In fluence of the feedstock mo lar rat io, temperature and t ime of the reaction on the conversion/yield and product purity and quality were equally reviewed. The thermo -kinetics of the biodiesel production, fuel properties of biodiesel and the trials subjected to biodiesel in terms of workab ility were considered for review in th is paper.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78251807","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 : 2012-12-01DOI: 10.5923/J.IJEE.20120206.05
K. Sandhu, Sudhir Sharma
Fast wind energy developments and their integration in existing power network may result in power quality problems. Therefore, in this paper, an attempt has been made to tackle the major power quality issues related to induction generators operating as grid connected induction (GCIG) and self excited induction generator (SEIG). MATLA B SIMULINK models as developed for GCIG and SEIG operation are found to be useful to analyse these effects. Simu lated results as obtained on these induction generators have been used to identify the machine parameters affecting the power quality issues such as active & reactive power, total harmonic d istortion etc. Further analysis of simulated results for two operating modes i.e. GCIG and SEIG seems to be useful fo r the design of such generators for overall power quality improvements.
风能的快速发展及其与现有电网的整合可能会导致电能质量问题。因此，本文试图解决感应发电机作为并网感应发电机(GCIG)和自励感应发电机(SEIG)运行时的主要电能质量问题。为GCIG和SEIG运行开发的MATLA B SIMULINK模型对分析这些影响很有用。利用对这些感应发电机的仿真结果，确定了影响有功功率、无功功率、总谐波失真等电能质量问题的电机参数。进一步分析GCIG和SEIG两种工作模式下的模拟结果，对提高发电机整体电能质量的设计有一定的指导意义。
{"title":"Power Quality Issues of Induction Generators in Different Operating Modes","authors":"K. Sandhu, Sudhir Sharma","doi":"10.5923/J.IJEE.20120206.05","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120206.05","url":null,"abstract":"Fast wind energy developments and their integration in existing power network may result in power quality problems. Therefore, in this paper, an attempt has been made to tackle the major power quality issues related to induction generators operating as grid connected induction (GCIG) and self excited induction generator (SEIG). MATLA B SIMULINK models as developed for GCIG and SEIG operation are found to be useful to analyse these effects. Simu lated results as obtained on these induction generators have been used to identify the machine parameters affecting the power quality issues such as active & reactive power, total harmonic d istortion etc. Further analysis of simulated results for two operating modes i.e. GCIG and SEIG seems to be useful fo r the design of such generators for overall power quality improvements.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90207830","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 : 2012-12-01DOI: 10.5923/J.IJEE.20120205.09
Pradeep Patanwar, S. Shukla
With the drastically change in climatic conditions in recent years, demand for air conditioning is spreading all over the world. Th is causes a primary consumption of energy in high quantity. In order to provide the best indoor air quality and thermal co mfort with min imu m consumption of energy, the hybrid desiccant cooling system is one of the options in our daily life. In this paper, an experimental performance study has been done on the hybrid desiccant cooling system. The effects of various parameters on performance of the system have also been observed. It is found that the influence of the parameters studied on the dehumid ification rate is similar to those reported earlier.
{"title":"Parametric Studies of a Hybrid Desiccant Cooling System","authors":"Pradeep Patanwar, S. Shukla","doi":"10.5923/J.IJEE.20120205.09","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120205.09","url":null,"abstract":"With the drastically change in climatic conditions in recent years, demand for air conditioning is spreading all over the world. Th is causes a primary consumption of energy in high quantity. In order to provide the best indoor air quality and thermal co mfort with min imu m consumption of energy, the hybrid desiccant cooling system is one of the options in our daily life. In this paper, an experimental performance study has been done on the hybrid desiccant cooling system. The effects of various parameters on performance of the system have also been observed. It is found that the influence of the parameters studied on the dehumid ification rate is similar to those reported earlier.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91187396","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 : 2012-12-01DOI: 10.5923/J.IJEE.20120205.03
H. Shin, D. Kim, Hyungjun Ahn, Sangmin Choi, G. Myoung
Heat recovery steam generators (HRSGs) are arranged at the tail end of gas turbines in co mb ined cycle power plants (CCPPs), and are designed to withstand the hot gas environment approaching 600℃. In addition to higher thermal to power efficiency, CCPPs show superior response characteristics compared to those of other conventional steam power plants. For that reason, frequent load changes on the system, which som etimes include daily start and stop (DSS) operation, would impose additional burden on the structural elements. The main objective o f this work is to analy ze the thermal stress conditions as related to the observed failure on the structural elements of HRSG casing, and to find root causes of failure of mechanical integrity. To achieve this goal, field measurements were performed to record temperatures of wall and stiffener of the casing fro m a real plant in operation. To consider the effect of hot gas on the casing, computational fluid dynamic (CFD) analysis of gas flow inside the HRSG with appropriate wall conditions using FLUENT V12. Thermal stress analysis on the thin wall of the casing and stiffeners of HRSG was conducted with the temperature data from the CFD results, using ANSYS Workbench V12. Su mmarizing the computational results, some limited ideas were presented which would be useful to prevent damages.
{"title":"Thermal Stress Analysis in Structural Elements of HRSG Casing","authors":"H. Shin, D. Kim, Hyungjun Ahn, Sangmin Choi, G. Myoung","doi":"10.5923/J.IJEE.20120205.03","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120205.03","url":null,"abstract":"Heat recovery steam generators (HRSGs) are arranged at the tail end of gas turbines in co mb ined cycle power plants (CCPPs), and are designed to withstand the hot gas environment approaching 600℃. In addition to higher thermal to power efficiency, CCPPs show superior response characteristics compared to those of other conventional steam power plants. For that reason, frequent load changes on the system, which som etimes include daily start and stop (DSS) operation, would impose additional burden on the structural elements. The main objective o f this work is to analy ze the thermal stress conditions as related to the observed failure on the structural elements of HRSG casing, and to find root causes of failure of mechanical integrity. To achieve this goal, field measurements were performed to record temperatures of wall and stiffener of the casing fro m a real plant in operation. To consider the effect of hot gas on the casing, computational fluid dynamic (CFD) analysis of gas flow inside the HRSG with appropriate wall conditions using FLUENT V12. Thermal stress analysis on the thin wall of the casing and stiffeners of HRSG was conducted with the temperature data from the CFD results, using ANSYS Workbench V12. Su mmarizing the computational results, some limited ideas were presented which would be useful to prevent damages.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89085619","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 : 2012-12-01DOI: 10.5923/J.IJEE.20120206.03
J. Hussain, K. Palaniradja, N. Alagumurthi, R. Manimaran
The usage of EGR adopted diesel engine increasing day by day world wide to reduce the NOx emissions. The EGR adopted engines can reduce NOx Considerably but it adversely improves the emissions of UHC nearly 40 to 50 %. We can avoid this effect by Reutilizat ion of UHC. In this paper the experimental investigation has been carried out on EGR adopted direct injection co mpression ignition engine with insertion of unburned hydro carbon rich exhaust. The results were presented and compared with all EGR levels. The result were evidenced that can reduce 20 to 25 % of UHC by this method.
{"title":"Effect of Exhaust Gas Recirculation (EGR) on Performance and Emission of a Compression Ignition Engine with Staged Combustion (Insertion of Unburned Hydrocarbon)","authors":"J. Hussain, K. Palaniradja, N. Alagumurthi, R. Manimaran","doi":"10.5923/J.IJEE.20120206.03","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120206.03","url":null,"abstract":"The usage of EGR adopted diesel engine increasing day by day world wide to reduce the NOx emissions. The EGR adopted engines can reduce NOx Considerably but it adversely improves the emissions of UHC nearly 40 to 50 %. We can avoid this effect by Reutilizat ion of UHC. In this paper the experimental investigation has been carried out on EGR adopted direct injection co mpression ignition engine with insertion of unburned hydro carbon rich exhaust. The results were presented and compared with all EGR levels. The result were evidenced that can reduce 20 to 25 % of UHC by this method.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73559768","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 : 2012-12-01DOI: 10.5923/J.IJEE.20120205.01
L. Bennamoun
The main objective of this work is to give an overview of the different used mathematical methods for modeling and calculating the energy and exergy efficiency of a solar dry ing system. For determination of the energy efficiency of thin or thick layers, heat and mass balances are established to the different co mponents. In the case of thick layers equations of porous med ia are used. These methods allow fo llo wing, in particular, the variat ions of the heated air and the product temperature and humidity. As a second part, the common way for the calculus of the exergetic efficiency passes through the establishment of exergy balance and after calculating the input, output and exergy loss. The influence and illustration of several parameters are as well presented in this paper.
{"title":"An Overview on Application of Exergy and Energy for Determination of Solar Drying Efficiency","authors":"L. Bennamoun","doi":"10.5923/J.IJEE.20120205.01","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120205.01","url":null,"abstract":"The main objective of this work is to give an overview of the different used mathematical methods for modeling and calculating the energy and exergy efficiency of a solar dry ing system. For determination of the energy efficiency of thin or thick layers, heat and mass balances are established to the different co mponents. In the case of thick layers equations of porous med ia are used. These methods allow fo llo wing, in particular, the variat ions of the heated air and the product temperature and humidity. As a second part, the common way for the calculus of the exergetic efficiency passes through the establishment of exergy balance and after calculating the input, output and exergy loss. The influence and illustration of several parameters are as well presented in this paper.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80186261","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 : 2012-12-01DOI: 10.5923/J.IJEE.20120205.10
R. Jeevajyothi, D. Devaraj
Th is paper investigates about the enhancement in grid voltage stability while integrating the large-scale variable speed wind turbine (VSWT) with direct drive synchronous generators (DDSG). A dynamic modeling and simulat ion of a grid connected VSWT driven DDSG with controllable power inverter strategies suitable for the study was developed, tested and verified. Th is dynamic model with its control scheme can regulate real power, maintain reactive power and generate voltage at different wind speeds. For th is paper, studies were conducted on a standard IEEE 14 bus system augmented by a rad ially connected wind power p lant (WPP) which contains 100 wind turbine generators (WTG). The studies include examin ing the voltage stability (λ-V) curves, voltage magnitude, reactive power delivered, loading margin and voltage collapse of the system. These voltage stability studies are done for the normal state as well as for line contingencies. It is found that large scale VSWT with DDSG at the transmission level has the potential to imp rove the long-term voltage stability of the grid by injecting react ive power with the help of controllable power inverter strategy.
{"title":"Voltage Stability Enhancement using VSWT with Direct Drive Synchronous Generators","authors":"R. Jeevajyothi, D. Devaraj","doi":"10.5923/J.IJEE.20120205.10","DOIUrl":"https://doi.org/10.5923/J.IJEE.20120205.10","url":null,"abstract":"Th is paper investigates about the enhancement in grid voltage stability while integrating the large-scale variable speed wind turbine (VSWT) with direct drive synchronous generators (DDSG). A dynamic modeling and simulat ion of a grid connected VSWT driven DDSG with controllable power inverter strategies suitable for the study was developed, tested and verified. Th is dynamic model with its control scheme can regulate real power, maintain reactive power and generate voltage at different wind speeds. For th is paper, studies were conducted on a standard IEEE 14 bus system augmented by a rad ially connected wind power p lant (WPP) which contains 100 wind turbine generators (WTG). The studies include examin ing the voltage stability (λ-V) curves, voltage magnitude, reactive power delivered, loading margin and voltage collapse of the system. These voltage stability studies are done for the normal state as well as for line contingencies. It is found that large scale VSWT with DDSG at the transmission level has the potential to imp rove the long-term voltage stability of the grid by injecting react ive power with the help of controllable power inverter strategy.","PeriodicalId":14041,"journal":{"name":"International journal of energy engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89691022","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}
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