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2009 Transmission & Distribution Conference & Exposition: Asia and Pacific最新文献

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Control strategy of on-load tap-changer based on digital substation 数字变电站有载分接开关控制策略
2009 Transmission & Distribution Conference & Exposition: Asia and Pacific Pub Date : 2009-12-18 DOI: 10.1109/TD-ASIA.2009.5356914
H. Zhang, J. He, Z. Bo, A. Klimek
{"title":"Control strategy of on-load tap-changer based on digital substation","authors":"H. Zhang, J. He, Z. Bo, A. Klimek","doi":"10.1109/TD-ASIA.2009.5356914","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356914","url":null,"abstract":"Voltage stability is one of the aspects of the power system stability. Since regulating transformers are more and more used in modern power system, tap change has often been considered as a principal mechanism that may lead to voltage collapse, but tap change can also rescue a would-be collapse system by extending the power transfer limit. Using time domain medium-and-long term voltage stability simulation program, the influence of the action of on-load tap-changer (OLTC) on voltage stability is analyzed. The development of its high-speed communication network in real-time system and the implementation of the IEC61850 standard have made the construction of digital substations possible. Based on digital substation system, the strategies of OLTC control is given which can improve the power system stability.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114618153","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
Optimizing probabilistic reserve in large power systems 大型电力系统的概率储备优化
2009 Transmission & Distribution Conference & Exposition: Asia and Pacific Pub Date : 2009-12-18 DOI: 10.1109/TD-ASIA.2009.5356964
M. Q. Wang, H. Gooi
{"title":"Optimizing probabilistic reserve in large power systems","authors":"M. Q. Wang, H. Gooi","doi":"10.1109/TD-ASIA.2009.5356964","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356964","url":null,"abstract":"In this paper, a probabilistic methodology for optimizing the spinning reserve requirements is proposed. The spinning reserve amount is determined by minimizing the total cost which includes operating cost, reserve cost and expected interruption cost. The optimization procedure is implemented in two steps: firstly, an approximated schedule can be computed based on simplified probabilities and reduced contingency events; secondly, the optimization is implemented again based on the approximated schedule. A more accurate result can be achieved through the two-step process.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"51 22","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120855784","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
Dynamic programming formulation of Micro-Grid operation with heat and electricity constraints 考虑热电约束的微电网运行动态规划公式
2009 Transmission & Distribution Conference & Exposition: Asia and Pacific Pub Date : 2009-12-18 DOI: 10.1109/TD-ASIA.2009.5356870
Minh Y Nguyen, Y. Yoon, N. Choi
{"title":"Dynamic programming formulation of Micro-Grid operation with heat and electricity constraints","authors":"Minh Y Nguyen, Y. Yoon, N. Choi","doi":"10.1109/TD-ASIA.2009.5356870","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356870","url":null,"abstract":"This paper addresses unit commitment for Micro-Grid optimization including renewable sources, working under deregulated power market. As Micro-Grid supplies both of heat and electricity consumer, operational optimization must be done in coordination. So far in this paper, renewable energy sources are considered to be negative load, and batteries, as well, are used as the load flattened device to raise possibly operational function. In state of solution, Dynamic Programming Method has been developed that solve out the maximum profit Micro-Grid that owner might achieve from energy trading in a day, either in isolated or connected mode.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127285481","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: 41
Software safety criteria and application procedure for the safety critical railway system 安全关键铁路系统软件安全标准及应用程序
2009 Transmission & Distribution Conference & Exposition: Asia and Pacific Pub Date : 2009-12-18 DOI: 10.1109/TD-ASIA.2009.5356897
E. Joung, C. M. Lee, H. M. Lee, G. Kim
{"title":"Software safety criteria and application procedure for the safety critical railway system","authors":"E. Joung, C. M. Lee, H. M. Lee, G. Kim","doi":"10.1109/TD-ASIA.2009.5356897","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356897","url":null,"abstract":"Software is widely used in the railway system such as train propulsion system, brake system, train control system, train detection system and driver display unit. Unfortunately, there is no software criteria and development procedure that are required to get the qualified software. Although analysis and evaluation of each step in the software lifecycle are the basic activity, direct coding to get some required functions is the main activity in the railway industry. The evaluation is just carried out in the system level functional test. Because the software has uncertainty in itself and difficulty in evaluation due to the invisibility, Sophisticated and exhausted examination is required throughout the lifecycle. The MLTM (Ministry of Land, Transport, and Maritime Affairs) in Korea is trying to improve the software development ability in the railway industry, and to ensure the quality and safety of railway software following announcement of the safety criteria for the safety critical railway software. This paper suggests safety criteria and software development process for safety critical railway system for more detail description.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129280044","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: 3
Training artificial neural networks for short-term electricity price forecasting 训练用于短期电价预测的人工神经网络
2009 Transmission & Distribution Conference & Exposition: Asia and Pacific Pub Date : 2009-12-18 DOI: 10.1109/TD-ASIA.2009.5356986
E. N. Chogumaira, T. Hiyama
{"title":"Training artificial neural networks for short-term electricity price forecasting","authors":"E. N. Chogumaira, T. Hiyama","doi":"10.1109/TD-ASIA.2009.5356986","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356986","url":null,"abstract":"This paper present a comparative study of training approaches for artificial neural network (ANN) used in forecasting short-term wholesale electricity prices. High probability of volatility in wholesale electricity prices and trends that are generally non-uniform create challenges when forecasting future prices using simple backpropagation feedforward ANN. A number of ANN architectures and training methods have been proposed for a variety of applications, and here we consider three approaches with actual electricity price data. The architectures considered in this study are: the well known feedforward and Elman networks trained with backpropagation, which are compared to feedforward network trained with genetic algorithm. Avoidance of local minima and minimization of computational cost are key performance indicators in ANN training. Number of training iterations needed to achieve target error and the generalization ability are used to compare the methods. This investigation is meant to guide in selecting ANN training method for electricity price forecasting.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123349188","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: 3
Fuzzy unit commitment strategy integrated with solar energy system using a modified differential evolution approach 基于改进差分进化方法的模糊单元承诺策略与太阳能系统集成
2009 Transmission & Distribution Conference & Exposition: Asia and Pacific Pub Date : 2009-12-18 DOI: 10.1109/TD-ASIA.2009.5357006
S. Chakraborty, T. Senjyu, A. Yona, A. Saber, T. Funabashi
{"title":"Fuzzy unit commitment strategy integrated with solar energy system using a modified differential evolution approach","authors":"S. Chakraborty, T. Senjyu, A. Yona, A. Saber, T. Funabashi","doi":"10.1109/TD-ASIA.2009.5357006","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5357006","url":null,"abstract":"This paper presents a fuzzy methodology for solving thermal unit commitment problem integrated with solar energy system using differential evolution approach. Solar energy with battery is integrated with the model due to lower electric cost and positive effect on the environment. Such inclusion of intermittent solar energy with thermal power generators, requires sophisticated methodology since the uncertainty is involved. Therefore the solar radiation, forecasted load demand and associated constraints are formulated as fuzzy sets considering the error. Then the unit commitment problem is solved using a modified differential evolution approach. Several simulations are presented in order to demonstrate the effectiveness of the proposed method.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126449532","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
The testing method of data transmission services of IEC 61850 based client 基于iec61850的客户端数据传输服务的测试方法
2009 Transmission & Distribution Conference & Exposition: Asia and Pacific Pub Date : 2009-12-18 DOI: 10.1109/TD-ASIA.2009.5356912
N. Lee, B. Jang, I. Song
{"title":"The testing method of data transmission services of IEC 61850 based client","authors":"N. Lee, B. Jang, I. Song","doi":"10.1109/TD-ASIA.2009.5356912","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356912","url":null,"abstract":"Substation Automation System based on IEC 61850 mainly is working its own performance throughout data communication among human machine interface as a client and a number of IEDs as servers. Both of them need verifying the conformance of IEC 61850 communication services because SAS can work under the strict assurance of their interoperability. UCA has already established conformance test procedures for IEC 61850 based server, otherwise, there is no test way for the client. So this paper presents the testing method of data transmission services such as client report function.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121339247","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
An improved integer coded genetic algorithm for power generation dispatch problem 求解发电调度问题的改进整数编码遗传算法
2009 Transmission & Distribution Conference & Exposition: Asia and Pacific Pub Date : 2009-12-18 DOI: 10.1109/TD-ASIA.2009.5356900
S. Golestani, M. Taddayon
{"title":"An improved integer coded genetic algorithm for power generation dispatch problem","authors":"S. Golestani, M. Taddayon","doi":"10.1109/TD-ASIA.2009.5356900","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356900","url":null,"abstract":"This paper improves integer coded genetic algorithm (ICGA) with some operators, to schedule the commitment states of units. ICGA technique reduces the size of chromosomes and computation time significantly. Chromosomes contain sequence of alternative sign integers which represent operation/reservation hours of the generating units. Therefore minimum up/down time can be checked directly in chromosome. This paper enhances ICGA, by using perturbation and Excessive-Power elimination operators. Mutation operator is also different from previous developed algorithms. Numerical result indicates the advantage of the proposed approach. It leads power generation dispatch problem to lower operating cost in comparison with other researches.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122275305","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: 4
Fast optimization method for service restoration in sub-transmission systems with priority loads 具有优先负荷的子传输系统业务恢复的快速优化方法
2009 Transmission & Distribution Conference & Exposition: Asia and Pacific Pub Date : 2009-12-18 DOI: 10.1109/TD-ASIA.2009.5356898
I. Watanabe, A. Takehara, Y. Nakachi, S. C. Verma
{"title":"Fast optimization method for service restoration in sub-transmission systems with priority loads","authors":"I. Watanabe, A. Takehara, Y. Nakachi, S. C. Verma","doi":"10.1109/TD-ASIA.2009.5356898","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356898","url":null,"abstract":"This paper proposes a new optimization method for service restoration in sub-transmission systems. The proposed method has some functions to ensure feasible switching operations and to speed up the optimization process. To adequately assess the unrestored total power after network switching operation, we model it as a restoration priority constrained maximum subset-sum problem. Moreover, the method uses only three promising candidates for the final radial configuration to speed up the process. Computational results with a test sub-transmission system show that the proposed method can find better solutions faster than the existing method.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115612162","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: 3
Case study of customer baseline(CBL) load determination in Korea based on statistical method 基于统计方法的韩国客户基线(CBL)负荷确定案例研究
2009 Transmission & Distribution Conference & Exposition: Asia and Pacific Pub Date : 2009-12-18 DOI: 10.1109/TD-ASIA.2009.5356907
Jong-Ryul Won, Yong-Beum Yoon, Jun-Ho Choi, Kyung-Keug Yi
{"title":"Case study of customer baseline(CBL) load determination in Korea based on statistical method","authors":"Jong-Ryul Won, Yong-Beum Yoon, Jun-Ho Choi, Kyung-Keug Yi","doi":"10.1109/TD-ASIA.2009.5356907","DOIUrl":"https://doi.org/10.1109/TD-ASIA.2009.5356907","url":null,"abstract":"Load management program in Korea is classified into two classes. One is related with load management equipments, such as demand controller, remote control air-conditioner, and thermal storage systems et al. The other is related with incentive for load reduction by customer's willingness. Typical element for incentive is the determination of customer basehne(CBL) of customer load. It is the load forecasting of each customer. Two methods have been proposed to get this solution, regression or statistical method. It is suggested that statistical method is better than regression at very random loads. This paper proposes case study analysis of the statistical method in real Korean customers.","PeriodicalId":131589,"journal":{"name":"2009 Transmission & Distribution Conference & Exposition: Asia and Pacific","volume":"51 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114046123","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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