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Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95最新文献

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Recent technical advancement of thyristor valve for HVDC transmission system 高压直流输电系统晶闸管阀的最新技术进展
Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95 Pub Date : 1995-11-21 DOI: 10.1109/EMPD.1995.500759
S. Tanabe, S. Irokawa
{"title":"Recent technical advancement of thyristor valve for HVDC transmission system","authors":"S. Tanabe, S. Irokawa","doi":"10.1109/EMPD.1995.500759","DOIUrl":"https://doi.org/10.1109/EMPD.1995.500759","url":null,"abstract":"Thyristor valves have progressed with an increasing thyristor capacity. Over the past 15 years the volume of a thyristor valve has reduced to about one-third and power loss to about one-half. The advance of thyristor valves, however, seems to have reached a saturation level if simply an increase in the thyristor capacity continues to be sought. To increase the dielectric strength of thyristors requires increasing the silicon wafer thickness and resistivity. Increased thickness and resistivity of silicon wafer, however, increase conduction loss of a thyristor valve. The conduction loss can be reduced by prolonging the carrier life-time of silicon wafer, which in turn increases the loss of a damping circuit. For improving such a tradeoff relationship, an ion irradiation technology was developed. It is shown that optimization of thyristor characteristics is important in optimizing the thyristor valve.","PeriodicalId":447674,"journal":{"name":"Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115745186","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}
引用次数: 0
A study on the expert system for fault location estimation in underground cable 地下电缆故障定位专家系统研究
Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95 Pub Date : 1995-11-21 DOI: 10.1109/EMPD.1995.500702
Chul-Hwan Kim, Woo-Gon Chung, Myong-chul Shin, Sung-Wan Park, Myong-Hee Lee, Yong-Pil Seo, Hae-Sul Choi
{"title":"A study on the expert system for fault location estimation in underground cable","authors":"Chul-Hwan Kim, Woo-Gon Chung, Myong-chul Shin, Sung-Wan Park, Myong-Hee Lee, Yong-Pil Seo, Hae-Sul Choi","doi":"10.1109/EMPD.1995.500702","DOIUrl":"https://doi.org/10.1109/EMPD.1995.500702","url":null,"abstract":"This paper presents an expert system for fault location estimation and fault type classification of underground cable systems. Many works on protection of underground cable have been reported in literature. However, these methods have a major disadvantage in that they need to stop power supply, while the proposed system does not. The system is simulated with CLIPS (C Language Integrated Production System) and MATLAB. EMTP data is used to demonstrate the capability of the proposed expert system.","PeriodicalId":447674,"journal":{"name":"Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126363483","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}
引用次数: 2
Research into wide speed range control of a TORUS motor TORUS电机宽调速范围控制研究
Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95 Pub Date : 1995-11-21 DOI: 10.1109/EMPD.1995.500802
H. Pan, A. Renfrew
{"title":"Research into wide speed range control of a TORUS motor","authors":"H. Pan, A. Renfrew","doi":"10.1109/EMPD.1995.500802","DOIUrl":"https://doi.org/10.1109/EMPD.1995.500802","url":null,"abstract":"Toroidal stator permanent magnet brushless DC machines are novel, double-sided, axial-flux, disc type machines with high power to weight ratio and high efficiency. A TORUS motor works very much like a separately excited DC motor with very low armature reaction. To extend the TORUS motor into the electrical traction field, a method for wide speed range is proposed by weakening the flux created by the permanent magnets. According to this scheme, experiments and modelling of the motor are carried out. The results prove the assumption is feasible. The implementation of this project is carried out with an improved IGBT inverter using a Flight-68 K microprocessor as controller.","PeriodicalId":447674,"journal":{"name":"Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125992044","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}
引用次数: 1
Fuzzy expert system for distribution system restoration and contingency operation 配电系统恢复与应急运行模糊专家系统
Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95 Pub Date : 1995-11-21 DOI: 10.1109/EMPD.1995.500703
M.C. Mendiola, C. Chang, S. Elangovan
{"title":"Fuzzy expert system for distribution system restoration and contingency operation","authors":"M.C. Mendiola, C. Chang, S. Elangovan","doi":"10.1109/EMPD.1995.500703","DOIUrl":"https://doi.org/10.1109/EMPD.1995.500703","url":null,"abstract":"Over the years, computer technologies have been applied to operate the distribution system in the most reliable and efficient manner. In this work, a fuzzy expert system prototype had been developed to aid operators in distribution system restoration and contingency operation. The knowledge base, which contains the different strategies used in the project, had been adopted from the standard operating procedures of the Manila Electric Company (MERALCO). For restoration planning, the following factors were utilized in the evaluation of the solutions: percent load of the circuit and transformer and percent unbalance of the circuit. On the other hand, circuit overloads, transformer overloads and bus voltage correction had been addressed in contingency operation. Fuzzy logic membership functions were employed to compromise among conflicting evaluation factors. A Newton-Raphson load flow was integrated into the system to verify the soundness of the solutions in case of doubt. The prototype was tested on a portion of MERALCO's distribution network which consists of 12 distribution substations with 25 buses and 24 lines. Within its problem domain, the prototype performed as expected.","PeriodicalId":447674,"journal":{"name":"Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132803238","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}
引用次数: 6
Latest developments in integrated hydro power plant and substation control systems 水电站和变电站综合控制系统的最新发展
Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95 Pub Date : 1995-11-21 DOI: 10.1109/EMPD.1995.500808
C. Brauner
{"title":"Latest developments in integrated hydro power plant and substation control systems","authors":"C. Brauner","doi":"10.1109/EMPD.1995.500808","DOIUrl":"https://doi.org/10.1109/EMPD.1995.500808","url":null,"abstract":"Increased emphasis is being placed on more efficient and cost effective ways to operate power plants and substations. A new generation of integrated control systems, unifying the advantages of conventional control concepts with the latest technology in data processing and distributed automation is offering new benefits to the power utility. The author discusses the concepts of integrated control systems, economy, safety, and availability. Practical examples are discussed.","PeriodicalId":447674,"journal":{"name":"Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130990511","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}
引用次数: 1
Monitoring and control of voltage stability in power systems 电力系统电压稳定性的监测与控制
Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95 Pub Date : 1995-11-21 DOI: 10.1109/EMPD.1995.500750
A. Sallam, M. Aboul-Ela, E.E. Elaraby
{"title":"Monitoring and control of voltage stability in power systems","authors":"A. Sallam, M. Aboul-Ela, E.E. Elaraby","doi":"10.1109/EMPD.1995.500750","DOIUrl":"https://doi.org/10.1109/EMPD.1995.500750","url":null,"abstract":"This paper proposes a new technique in controlling voltage instability in power systems. This technique coordinates between the reactive power of excitation systems and that of static VAr compensators (SVCs). The method starts with the decomposition of system into several voltage control areas (VCAs). When a reactive power deficiency occurs in certain area, excitation systems respond first to supply the required reactive power by increasing reactive generation of synchronous generators to its upper limit. If more reactive power is needed within the specific area to recover voltage instability, an SVC will be inserted by a switching controller in order to achieve the reactive balance. This controller receives an actuating signal when the terminal voltage is still unsatisfactory. By this technique, it is possible to fully utilize the excitation systems reactive power, and to design economically sized SVCs to recover voltage instability. The application of the proposed technique on the New-England 39 bus system proves its efficiency in controlling voltage instability.","PeriodicalId":447674,"journal":{"name":"Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115029335","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}
引用次数: 7
A PC-based tool to calculate voltage drops and select cables for final subcircuits 一个基于pc的工具，用于计算电压降和选择最终子电路的电缆
Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95 Pub Date : 1995-11-21 DOI: 10.1109/EMPD.1995.500787
S.P. Zhu, J. Liu, K. Tan, C. S. Tan
{"title":"A PC-based tool to calculate voltage drops and select cables for final subcircuits","authors":"S.P. Zhu, J. Liu, K. Tan, C. S. Tan","doi":"10.1109/EMPD.1995.500787","DOIUrl":"https://doi.org/10.1109/EMPD.1995.500787","url":null,"abstract":"An interactive graphical user interface (GUI) package for the sizing of cables in building installation design, called CABSEL, is presented in this paper. The main purpose of this package is to replace the obsolete software programs previously used in cable selection with a user-friendly and interactive GUI program. In addition, this paper is also written to emphasize the impact of modern world technology in the field of electrical engineering. No longer is the cable sizing process a manual-intensive and tedious job. Instead, with the aid of CABSEL, cable sizing is now a relatively easy and simple task.","PeriodicalId":447674,"journal":{"name":"Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95","volume":"67 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123250321","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}
引用次数: 1
Benefit optimization of electric energy exchange and power system operation 电能交换和电力系统运行的效益优化
Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95 Pub Date : 1995-11-21 DOI: 10.1109/EMPD.1995.500692
F. Nishimura
{"title":"Benefit optimization of electric energy exchange and power system operation","authors":"F. Nishimura","doi":"10.1109/EMPD.1995.500692","DOIUrl":"https://doi.org/10.1109/EMPD.1995.500692","url":null,"abstract":"Due to structural changes in supply and demand of electric energy, the need for more efficient operation of the electric power system has grown. Under this circumstance, the role of electric energy exchange is becoming critical. This paper examines how the benefit from electric energy exchange can be optimized, and how various factors in the operation of the electric power system affects the optimization. WRATES is employed for power system analysis, and the data from the EPRI Regional Systems is applied for the simulation. Modified marginal costs are introduced to describe the cost and benefit of electric energy exchange. Network considerations are very important to optimize the benefit. Inaccurate evaluation of the network would reduce benefit from electric energy exchange, and could harm power system operations. In addition, governmental policies and institutional framework such as fundamental control mechanism and structure of the electric power industry are important factors.","PeriodicalId":447674,"journal":{"name":"Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123254485","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}
引用次数: 0
Philosophy for operation of distribution system automation schemes: ACTEW's approach 配电系统自动化方案的运行理念:ACTEW的方法
Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95 Pub Date : 1995-11-21 DOI: 10.1109/EMPD.1995.500697
J. Cornell
{"title":"Philosophy for operation of distribution system automation schemes: ACTEW's approach","authors":"J. Cornell","doi":"10.1109/EMPD.1995.500697","DOIUrl":"https://doi.org/10.1109/EMPD.1995.500697","url":null,"abstract":"ACTEW Corp. has embarked on a series of pilot remote control and operations schemes to evaluate potential distribution system automation (DSA) operational philosophies in the national capital city of Australia, Canberra. In commercial districts which essentially comprise ring main unit connected underground circuits with some tee'd cross connections, ACTEW (in partnership with private engineers) is developing a network of actuator-operated switches controlled via VHF radio-, or trunked radio-linked RTUs. Domestic districts are reticulated by feeders which combine multiply-interspersed overhead and underground sections. To automate this arrangement, the philosophy must accommodate this diversity of circuitry and is being addressed by a combination of pole-mounted switches (on the overhead sections) and actuator operated switches on the underground sections. All operating philosophies are being trialed in a \"remote control\" mode before full automation is attempted.","PeriodicalId":447674,"journal":{"name":"Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124898653","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}
引用次数: 2
Multiobjective power dispatch using fuzzy linear programming 基于模糊线性规划的多目标电力调度
Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95 Pub Date : 1995-11-21 DOI: 10.1109/EMPD.1995.500820
Hong-Tzer Yang, Chao-Ming Huang, Huey Min Lee, C. Huang
{"title":"Multiobjective power dispatch using fuzzy linear programming","authors":"Hong-Tzer Yang, Chao-Ming Huang, Huey Min Lee, C. Huang","doi":"10.1109/EMPD.1995.500820","DOIUrl":"https://doi.org/10.1109/EMPD.1995.500820","url":null,"abstract":"This paper presents a new fuzzy linear programming (FLP) approach to determine the multiobjective power dispatch problem by taking into account fuel cost and environmental impact of NO/sub x/ emission. The FLP technique first separately optimizes each objective. To further offer the best compromise solution out of the noninferiority domain obtained by the FLP based operator, a preference index of a distance membership function is used to aid the power system operator to adjust the generation levels in a most economic manner but also with minimal impact on the environment. The effectiveness of the proposed approach has been demonstrated on a 10-bus 5-generator system. Numerical results reveal that the FLP is a promising and efficient approach for dealing with the multiobjective nature of the power dispatch problem.","PeriodicalId":447674,"journal":{"name":"Proceedings 1995 International Conference on Energy Management and Power Delivery EMPD '95","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125982835","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}
引用次数: 10
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