Pub Date : 2005-07-11DOI: 10.1109/PESAFR.2005.1611858
G. Sibilant, A. Britten, W. de Villiers
Noise measurements in the power line carrier (PLC) bands of a long HVDC line using an insulated shield wire were taken over a period of 3 to 4 months at a PLC repeater station and the data was analysed. Analysis showed that on some days, very high noise levels were experienced, thereby causing errors in communication between the two converter stations. It was postulated that spark gaps, used together with the shield wire insulators, could be the cause of this extraneous noise. Laboratory work was undertaken in order to determine what the noise signatures from various sparkover events on the shield wire of a long HVDC line would look like in the frequency spectrum. Tests were conducted under AC and DC voltage stresses. The radiated noise levels due to the sparkovers were measured using an inefficient loop antenna and a selective voltmeter. Various noise signatures for the various flashover phenomenon tested, were identified
{"title":"Determination of the noise signatures of various sparkover phenomena on the insulated shield wire of long HVDC lines","authors":"G. Sibilant, A. Britten, W. de Villiers","doi":"10.1109/PESAFR.2005.1611858","DOIUrl":"https://doi.org/10.1109/PESAFR.2005.1611858","url":null,"abstract":"Noise measurements in the power line carrier (PLC) bands of a long HVDC line using an insulated shield wire were taken over a period of 3 to 4 months at a PLC repeater station and the data was analysed. Analysis showed that on some days, very high noise levels were experienced, thereby causing errors in communication between the two converter stations. It was postulated that spark gaps, used together with the shield wire insulators, could be the cause of this extraneous noise. Laboratory work was undertaken in order to determine what the noise signatures from various sparkover events on the shield wire of a long HVDC line would look like in the frequency spectrum. Tests were conducted under AC and DC voltage stresses. The radiated noise levels due to the sparkovers were measured using an inefficient loop antenna and a selective voltmeter. Various noise signatures for the various flashover phenomenon tested, were identified","PeriodicalId":270664,"journal":{"name":"2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116627565","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 : 2005-07-11DOI: 10.1109/PESAFR.2005.1611838
R. Koch, N. Gumede
The impact of power system harmonics generated by customer installations and utility equipment (i.e. SVC's and HVDC schemes) is affected by the presence of resonance conditions in the supply network. Such resonance conditions arise due to the interaction of the generally inductive network with utility capacitors, customer power factor correction capacitors, and line and cable capacitances. The management of such resonance conditions is important in ensuring that harmonic levels are managed on utility networks., and that fair emission limits are allocated to customers. This paper considers the impact of shunt capacitor resonances on the allocation of harmonic emission limits using standards such as IEEE 519:1992 and IEC 61000-3-6:1996
{"title":"The impact of harmonic resonance conditions on the connection rules for large industrial installations","authors":"R. Koch, N. Gumede","doi":"10.1109/PESAFR.2005.1611838","DOIUrl":"https://doi.org/10.1109/PESAFR.2005.1611838","url":null,"abstract":"The impact of power system harmonics generated by customer installations and utility equipment (i.e. SVC's and HVDC schemes) is affected by the presence of resonance conditions in the supply network. Such resonance conditions arise due to the interaction of the generally inductive network with utility capacitors, customer power factor correction capacitors, and line and cable capacitances. The management of such resonance conditions is important in ensuring that harmonic levels are managed on utility networks., and that fair emission limits are allocated to customers. This paper considers the impact of shunt capacitor resonances on the allocation of harmonic emission limits using standards such as IEEE 519:1992 and IEC 61000-3-6:1996","PeriodicalId":270664,"journal":{"name":"2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114553978","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 : 2005-07-11DOI: 10.1109/PESAFR.2005.1611832
W. Qiao, R. Harley
With a properly designed external controller, the series capacitive reactance compensator (SCRC) can be used to damp low frequency power oscillations in a power network. Conventionally, linear control techniques are used to design the external controller for a SCRC around a specific operating point where the nonlinear system equations are linearized. However, at other operating points its performance degrades. The indirect adaptive neuro-control scheme offers an attractive approach to overcome this SCRC control problem. As an essential part of this control scheme, an adaptive neuro-identifier has to be firstly designed in order to provide an accurate dynamic plant model for the design of the external neuro-controller. In this paper, an adaptive neuro-identifier using a radial basis function neural network (RBFNN) is proposed for on-line identification of an SCRC connected to a multi-machine power system. Results are included to show that this RBF neuro-identifier continuously tracks the plant dynamics with good precision
{"title":"On-line identification of series capacitive reactance compensator in a multimachine power system using a radial basis function neural network","authors":"W. Qiao, R. Harley","doi":"10.1109/PESAFR.2005.1611832","DOIUrl":"https://doi.org/10.1109/PESAFR.2005.1611832","url":null,"abstract":"With a properly designed external controller, the series capacitive reactance compensator (SCRC) can be used to damp low frequency power oscillations in a power network. Conventionally, linear control techniques are used to design the external controller for a SCRC around a specific operating point where the nonlinear system equations are linearized. However, at other operating points its performance degrades. The indirect adaptive neuro-control scheme offers an attractive approach to overcome this SCRC control problem. As an essential part of this control scheme, an adaptive neuro-identifier has to be firstly designed in order to provide an accurate dynamic plant model for the design of the external neuro-controller. In this paper, an adaptive neuro-identifier using a radial basis function neural network (RBFNN) is proposed for on-line identification of an SCRC connected to a multi-machine power system. Results are included to show that this RBF neuro-identifier continuously tracks the plant dynamics with good precision","PeriodicalId":270664,"journal":{"name":"2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131397643","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 : 2005-07-11DOI: 10.1109/PESAFR.2005.1611848
M. Rahman
In recent years, high efficiency electric motors are demanded to meet the challenges of energy hungry world with limited fossil fuel sources. Interior permanent magnet (IPM) motors have been increasingly developed and widely used to meet the high efficiency and performance requirements. It is because; an IPM is a highly efficient synchronous motor with built-in advantageous features. This is due to advances in high-energy permanent magnets, smart inverters and intelligent controllers. This paper provides an outline of a modern IPM motor in an electronic world. On-line and soft starting of an IPM motor are provided. Highlights of IPM motors include applications in Japanese air conditioners and hybrid electric vehicles, which are two examples of ac motor drives in domestic heat pumps and passenger automobiles for the competitive market place
{"title":"Advances in interior permanent magnet (IPM) motor drives","authors":"M. Rahman","doi":"10.1109/PESAFR.2005.1611848","DOIUrl":"https://doi.org/10.1109/PESAFR.2005.1611848","url":null,"abstract":"In recent years, high efficiency electric motors are demanded to meet the challenges of energy hungry world with limited fossil fuel sources. Interior permanent magnet (IPM) motors have been increasingly developed and widely used to meet the high efficiency and performance requirements. It is because; an IPM is a highly efficient synchronous motor with built-in advantageous features. This is due to advances in high-energy permanent magnets, smart inverters and intelligent controllers. This paper provides an outline of a modern IPM motor in an electronic world. On-line and soft starting of an IPM motor are provided. Highlights of IPM motors include applications in Japanese air conditioners and hybrid electric vehicles, which are two examples of ac motor drives in domestic heat pumps and passenger automobiles for the competitive market place","PeriodicalId":270664,"journal":{"name":"2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134327406","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 : 2005-07-11DOI: 10.1109/PESAFR.2005.1611826
C. Panigrahi, P. K. Chattopadhyay, R. Chakrabarti
The restructuring of the electric power industry has involved paradigm shifts in the real time control activities of the power grids. Optimal power flow (OPF) is the most significant technique for obtaining minimum cost generation patterns in a power system with existing transmission and operational constraints. Flexible AC transmission system (FACTS) devices have the ability to allow power systems to operate in a more flexible, secure, economic, and sophisticated way and to minimize line congestion. The objective of paper is to develop OPF solution incorporating FACTS devices in deregulated power market
{"title":"FACTS in deregulated market scenario","authors":"C. Panigrahi, P. K. Chattopadhyay, R. Chakrabarti","doi":"10.1109/PESAFR.2005.1611826","DOIUrl":"https://doi.org/10.1109/PESAFR.2005.1611826","url":null,"abstract":"The restructuring of the electric power industry has involved paradigm shifts in the real time control activities of the power grids. Optimal power flow (OPF) is the most significant technique for obtaining minimum cost generation patterns in a power system with existing transmission and operational constraints. Flexible AC transmission system (FACTS) devices have the ability to allow power systems to operate in a more flexible, secure, economic, and sophisticated way and to minimize line congestion. The objective of paper is to develop OPF solution incorporating FACTS devices in deregulated power market","PeriodicalId":270664,"journal":{"name":"2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130697349","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 : 2005-07-11DOI: 10.1109/PESAFR.2005.1611779
L. Vargas, J.S. Rajoo
The role of new and renewable energy (NRE) sources is increasing rapidly, and probably this trend will continue in the medium and long term. The main purpose of this paper is to investigate the possible evolution of the energy for electricity generation from renewable resources in the APEC region for the period 2005-2050. Scenario projections are obtained by using specific econometric models which estimate the electricity consumption in residential, commercial, industrial, and transportation sectors. Results indicate the impact of different energy pathways on emissions, fuel consumption and some political implications.
{"title":"The role of new and renewable electricity generation technologies in APEC region: present and future perspectives","authors":"L. Vargas, J.S. Rajoo","doi":"10.1109/PESAFR.2005.1611779","DOIUrl":"https://doi.org/10.1109/PESAFR.2005.1611779","url":null,"abstract":"The role of new and renewable energy (NRE) sources is increasing rapidly, and probably this trend will continue in the medium and long term. The main purpose of this paper is to investigate the possible evolution of the energy for electricity generation from renewable resources in the APEC region for the period 2005-2050. Scenario projections are obtained by using specific econometric models which estimate the electricity consumption in residential, commercial, industrial, and transportation sectors. Results indicate the impact of different energy pathways on emissions, fuel consumption and some political implications.","PeriodicalId":270664,"journal":{"name":"2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132098836","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 : 2005-07-11DOI: 10.1109/PESAFR.2005.1611814
K. Fossdal, K. A. Barmsnes
During the last decade competitive market based solutions for trading of electricity have been introduced around the world. Most of these markets have been based on local, national solutions, but in some areas regional, multi-national solutions have been developed. An introduction to the Nordic regional electricity market, its development, structure, and governance will be presented. The development of generation reserves will also be explained and how the system operators coordinate their efforts to maintain a reliable power supply in a power system with diminishing gap between installed generation capacity and peak load. The paper will also highlight how regional cooperation can maintain the security of supply by optimizing use of existing infrastructure and by developing new coordinated protection schemes that allows the system operators to increase transmission limits with small investment costs. The paper will give an overview of some general experiences with electricity market developments, with special focus on the need for harmonization between nations when regional markets are developed and the benefits of regional market solutions
{"title":"Regional, multi-national electricity markets","authors":"K. Fossdal, K. A. Barmsnes","doi":"10.1109/PESAFR.2005.1611814","DOIUrl":"https://doi.org/10.1109/PESAFR.2005.1611814","url":null,"abstract":"During the last decade competitive market based solutions for trading of electricity have been introduced around the world. Most of these markets have been based on local, national solutions, but in some areas regional, multi-national solutions have been developed. An introduction to the Nordic regional electricity market, its development, structure, and governance will be presented. The development of generation reserves will also be explained and how the system operators coordinate their efforts to maintain a reliable power supply in a power system with diminishing gap between installed generation capacity and peak load. The paper will also highlight how regional cooperation can maintain the security of supply by optimizing use of existing infrastructure and by developing new coordinated protection schemes that allows the system operators to increase transmission limits with small investment costs. The paper will give an overview of some general experiences with electricity market developments, with special focus on the need for harmonization between nations when regional markets are developed and the benefits of regional market solutions","PeriodicalId":270664,"journal":{"name":"2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132384535","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 : 2005-07-11DOI: 10.1109/PESAFR.2005.1611820
I. Dube, M. Beta, S. Dihwa
Traditionally the development of power systems has largely been dominated by the drive towards matching forecasted demand with generation supply capacity. This often takes the form of increasing generation capacity in order to meet forecasted demand. With the current envisaged electrical energy shortfall in the Southern African Region, by 2007, DSM presents itself as an immediate strategy to alleviate this potential situation. There are a number of opportunities for DSM initiatives in the region, which if fully exploited, will create useful virtual generation capacities in a number of countries that can enable minimization of the forecasted shortfall, and also contribute positively to reduction in global warming effects. In order to accommodate the ever-growing environmental concerns,, there is a growing drive in the power sector to move away from the vertical approach to power systems planning and economics and move towards integrated resource planning approaches. In this endeavor, the objective is to match demand for electrical energy services in a way that minimizes the overall social costs. The power system planner needs to examine the full portfolio of available investment options on both sides of the customer meter. Demand side management (DSM) options present themselves as noble options in the planning of future power systems. This paper highlights the opportunities for DSM as an option in modern energy resource planning approaches. The paper will present the potential energy savings that could be realized from DSM initiatives as obtained in previous studies in Zimbabwe. It will also highlight the initiatives currently being taken to incorporate DSM in the whole planning process, the problems being encountered and recommendations on the way forward. If fully exploited, DSM options can prudently assist in efforts currently being taken to reduce global warming effects emanating from conventional electricity generating sources
{"title":"Opportunities for demand side management (DSM) in integrated energy resource planning and development in the power sector: the case of Zimbabwe","authors":"I. Dube, M. Beta, S. Dihwa","doi":"10.1109/PESAFR.2005.1611820","DOIUrl":"https://doi.org/10.1109/PESAFR.2005.1611820","url":null,"abstract":"Traditionally the development of power systems has largely been dominated by the drive towards matching forecasted demand with generation supply capacity. This often takes the form of increasing generation capacity in order to meet forecasted demand. With the current envisaged electrical energy shortfall in the Southern African Region, by 2007, DSM presents itself as an immediate strategy to alleviate this potential situation. There are a number of opportunities for DSM initiatives in the region, which if fully exploited, will create useful virtual generation capacities in a number of countries that can enable minimization of the forecasted shortfall, and also contribute positively to reduction in global warming effects. In order to accommodate the ever-growing environmental concerns,, there is a growing drive in the power sector to move away from the vertical approach to power systems planning and economics and move towards integrated resource planning approaches. In this endeavor, the objective is to match demand for electrical energy services in a way that minimizes the overall social costs. The power system planner needs to examine the full portfolio of available investment options on both sides of the customer meter. Demand side management (DSM) options present themselves as noble options in the planning of future power systems. This paper highlights the opportunities for DSM as an option in modern energy resource planning approaches. The paper will present the potential energy savings that could be realized from DSM initiatives as obtained in previous studies in Zimbabwe. It will also highlight the initiatives currently being taken to incorporate DSM in the whole planning process, the problems being encountered and recommendations on the way forward. If fully exploited, DSM options can prudently assist in efforts currently being taken to reduce global warming effects emanating from conventional electricity generating sources","PeriodicalId":270664,"journal":{"name":"2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124855519","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 : 2005-07-11DOI: 10.1109/PESAFR.2005.1611812
L. Musaba
The Southern African Power Pool (SAPP) has come a long way in establishing a competitive electricity market for the Southern African region. In the early 1960's, only a few participants took part in the market that was typically governmental to governmental bilateral agreements. As the interconnections expanded, more participants entered the market. The main drawbacks at that time were transmission tariffs and the pricing of electricity. It was difficult to get third party access and this prevented meaningful trading from taking place between countries. From 1995, the north-south interconnector was commissioned and this paved the way for increased energy trading between the predominantly northern hydro networks and the southern thermal systems. In 2001, the SAPP started the short-term energy market (STEM). The STEM market was viewed as a first step towards the development of a regional competitive electricity market. In the STEM energy is traded a day-ahead. The STEM is a firm energy market though bilateral contracts takes precedence over STEM contracts on the transmission lines. From January 2004., the SAPP embarked on the development of a competitive electricity market. The aim of this paper is to describe the development of the SAPP competitive electricity market and the challenges the SAPP is facing in migrating from a cooperative pool into a competitive pool. The results of the market simulation will be presented predicting how competition in the electricity supply industry of southern Africa would work taking into account that most of the members are not only vertically integrated but also government
{"title":"The development of the SAPP competitive electricity market","authors":"L. Musaba","doi":"10.1109/PESAFR.2005.1611812","DOIUrl":"https://doi.org/10.1109/PESAFR.2005.1611812","url":null,"abstract":"The Southern African Power Pool (SAPP) has come a long way in establishing a competitive electricity market for the Southern African region. In the early 1960's, only a few participants took part in the market that was typically governmental to governmental bilateral agreements. As the interconnections expanded, more participants entered the market. The main drawbacks at that time were transmission tariffs and the pricing of electricity. It was difficult to get third party access and this prevented meaningful trading from taking place between countries. From 1995, the north-south interconnector was commissioned and this paved the way for increased energy trading between the predominantly northern hydro networks and the southern thermal systems. In 2001, the SAPP started the short-term energy market (STEM). The STEM market was viewed as a first step towards the development of a regional competitive electricity market. In the STEM energy is traded a day-ahead. The STEM is a firm energy market though bilateral contracts takes precedence over STEM contracts on the transmission lines. From January 2004., the SAPP embarked on the development of a competitive electricity market. The aim of this paper is to describe the development of the SAPP competitive electricity market and the challenges the SAPP is facing in migrating from a cooperative pool into a competitive pool. The results of the market simulation will be presented predicting how competition in the electricity supply industry of southern Africa would work taking into account that most of the members are not only vertically integrated but also government","PeriodicalId":270664,"journal":{"name":"2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127123472","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 : 2005-07-11DOI: 10.1109/PESAFR.2005.1611805
D. Naidoo, N. Ijumba
A recent review of the currently used HVDC line protection systems clearly indicated that these systems were not adequately equipped to protect HVDC schemes with extremely long HVDC transmission lines. Therefore, considering the increase in HVDC transmission line lengths projected for the future HVDC schemes, it is of vital importance that some type of solution be established to address the shortcomings of these existing schemes. This paper firstly discusses the shortcomings faced by the existing protection systems and then attempts to develop a protection system that is not plagued by the same shortcomings, to ensure that the proposed protection system will in fact be able to provide the required level of protection for HVDC systems with extremely long transmission lines. For increased reliability, the proposed system is able to make all protection decisions solely on local detection but telecommunications can be used, when available, to try and optimize the overall response of the protection system
{"title":"A protection system for long HVDC transmission lines","authors":"D. Naidoo, N. Ijumba","doi":"10.1109/PESAFR.2005.1611805","DOIUrl":"https://doi.org/10.1109/PESAFR.2005.1611805","url":null,"abstract":"A recent review of the currently used HVDC line protection systems clearly indicated that these systems were not adequately equipped to protect HVDC schemes with extremely long HVDC transmission lines. Therefore, considering the increase in HVDC transmission line lengths projected for the future HVDC schemes, it is of vital importance that some type of solution be established to address the shortcomings of these existing schemes. This paper firstly discusses the shortcomings faced by the existing protection systems and then attempts to develop a protection system that is not plagued by the same shortcomings, to ensure that the proposed protection system will in fact be able to provide the required level of protection for HVDC systems with extremely long transmission lines. For increased reliability, the proposed system is able to make all protection decisions solely on local detection but telecommunications can be used, when available, to try and optimize the overall response of the protection system","PeriodicalId":270664,"journal":{"name":"2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130068068","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：