{"title":"AC breakdown voltage characteristics simulation of SF6/N2 in non-uniform field and extra high voltage","authors":"Byung-Taek Lee, C. Huh, Yong-moo Chang","doi":"10.1109/PEOCO.2010.5559211","DOIUrl":"https://doi.org/10.1109/PEOCO.2010.5559211","url":null,"abstract":"SF6 is the most commonly used insulating gas in electrical systems. But In these days SF6 mixtures and alternative gas has been studied because of global warming. so although many studies have been carried out about binary gas mixtures with SF6, few studies were presented about breakdown characteristics of SF6/N2 mixtures. At present study the breakdown characteristics of SF6/N2 mixtures in Non-uniform field was performed. In this paper, breakdown experiment values and breakdown simulation values are compared. Streamer theory was used for predicting breakdown voltage. For accurate simulation field factor, this simulation apply E field utilization using cst program AC breakdown experiments in non-uniform field was performed to compare with the breakdown simulation values. The pressure range of gas mixtures was 0.4 MPa to 0.7 MPa. The rod-plane was used and mixture ratio is SF6 20% : N2 80%. The gap lengths is 10mm to 70mm. As pressure increase, this simulation value do not correspond to the experiment value. So this simulation apply to utilization factor using CST program In the result, it was observed that breakdown voltage increase as pressure and gap lengths increase. But with gap lengths increasing, the breakdown voltage is saturated. So simulation need surface roughness factor.","PeriodicalId":379868,"journal":{"name":"2010 4th International Power Engineering and Optimization Conference (PEOCO)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132958172","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}
{"title":"Power system damping using fuzzy controlled TCSC device","authors":"N. Magaji, M. Mustafa, Zaniah binti Muda","doi":"10.1109/PEOCO.2010.5559207","DOIUrl":"https://doi.org/10.1109/PEOCO.2010.5559207","url":null,"abstract":"This paper investigates the application of TCSC hybrid controller for improving damping inter-area modes of oscillations. The proposed controller comprised fuzzy logic proportional and derivative controller with the conventional Proportional and integral controller (FUZZY PD+PI). The FUZZY PD terms improve the stability of the system, reduce the overshoot, and increase the transient response of the system. The conventional integral (I) term is responsible for eliminating a steady-state error while the proportional term will have the effect of reducing the rise time and will also reduce a steady-state error. The proposed control scheme optimize the FPID control parameters, KP, KI and K to obtain the best control effect by minimizing the integral time square error online. The performance of the proposed hybrid control in increasing the damping of local and inter-area modes of oscillation is demonstrated in a practical reduce system of south Malaysian power network called TNB 25-bus system.","PeriodicalId":379868,"journal":{"name":"2010 4th International Power Engineering and Optimization Conference (PEOCO)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129409848","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}
{"title":"Analysis of thermal behavior of power system fuse using finite element method","authors":"H. F. Farahani, M. Asadi, A. Kazemi","doi":"10.1109/PEOCO.2010.5559169","DOIUrl":"https://doi.org/10.1109/PEOCO.2010.5559169","url":null,"abstract":"One of the most important protective devices in power system is fuses. It is important to know the thermal behavior of a fuse for an optimized design as well as for a right choice of the fuse rating with the aim to protect the power system. Passing the current from the fuse leads to hot the fuse element and open the current path and interrupt the fault current. So, the temperature of the fuse directly affects the fuse operation and melting. The designed fuse must operate correctly in the nominal and instantaneous over current (such as motor starting) and interrupt the short circuit current. In this paper, a 2D thermal model of fuse is developed in order to study the temperature distribution at a fuse in ANSYS. The effect of the current harmonics (current with different THD) on the fuse thermal is investigated and the temperature distribution through all fuse link elements is shown.","PeriodicalId":379868,"journal":{"name":"2010 4th International Power Engineering and Optimization Conference (PEOCO)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115477034","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}
G. Mokhtari, A. Behnood, J. Ebrahimi, G. Gharehpetian
{"title":"LMP calculation, considering network topology uncertainty","authors":"G. Mokhtari, A. Behnood, J. Ebrahimi, G. Gharehpetian","doi":"10.1109/PEOCO.2010.5559250","DOIUrl":"https://doi.org/10.1109/PEOCO.2010.5559250","url":null,"abstract":"DC Optimal Power Flow (DCOPF) model calculates locational marginal prices (LMPs) in order to optimize the total operation cost of system. Generally, no account is taken for the cost of network topology uncertainty. In this paper, first, a DCOPF algorithm is presented to consider network topology uncertainty. The optimization function algorithm has three items that depend on the line and unit parameters. The linear programming is used for solving this problem. After specifying the result of DC-OPF, with the proposed formulation for LMP, the LMP of each bus, considering network topology uncertainty of power system, is calculated. The proposed method is evaluated using PJM 5-bus test systems as a case study. The results show that the uncertainty in network topology has the considerable effect on the LMP of buses.","PeriodicalId":379868,"journal":{"name":"2010 4th International Power Engineering and Optimization Conference (PEOCO)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114278654","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}
{"title":"Sensitivity of low voltage consumer equipment to voltage sags","authors":"S. Hardi, I. Daut","doi":"10.1109/PEOCO.2010.5559179","DOIUrl":"https://doi.org/10.1109/PEOCO.2010.5559179","url":null,"abstract":"Voltage sag is an issue that is becoming increasingly important to electricity consumers at all level of usage. These result from with increasing use of electronic equipment in several sectors for the reason to improve energy efficiency and performance. Customer's included in low voltage environments mostly are sectors: Commercial, Residential and Light industrial. In these sectors many found equipments such as television, microwave ovens, personal computers, printer, lighting, heating ventilation air conditioners, motor contactor etc. Using with high efficiency fluorescent lighting with electronic ballast, single phase switch mode power supplies for computers, contactor for protecting motor from suddenly restarting when the voltage is recovered. These equipments are characterized as highly susceptible to voltage sags. Voltage sags are most frequent among various types of power quality disturbance faced by many consumers. Source of voltage sags are generally caused by short circuit faults associated with equipment failures on the supplying power system. Voltage sags normally do not cause equipment damage, but it can easily disrupt the operation sensitive equipment. Effects produced by voltage sags are various generally depending on its characteristics and equipment. The magnitude and duration of the sags are commonly used to evaluate sensitivity of equipment. The other characteristic such as point on wave of voltage sag initiation is significance influence to be considered. This paper presents voltage sag tolerance levels curves of three equipments sensitive to sags namely; personal computers, contactors and lightings. A Schaffner “Profline2100” has used to generate voltage sags and testing to get sensitivity of the equipment.","PeriodicalId":379868,"journal":{"name":"2010 4th International Power Engineering and Optimization Conference (PEOCO)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127298958","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}
{"title":"One day ahead prediction of wind speed based on power and exponential","authors":"M. Gholami, G. Gharehpetian, M. Davari","doi":"10.1109/PEOCO.2010.5559177","DOIUrl":"https://doi.org/10.1109/PEOCO.2010.5559177","url":null,"abstract":"This paper presents a new model for predicting wind speed. This technique is based on using a power and a exponential model relating the predicted interval to its corresponding one-year old data. The accuracy of the model for predicting wind speeds and directions up to 24 h ahead have been investigated using two sets of data. Generated results are compared with reference [1]. The presented results validate the effectiveness and accuracy of the proposed prediction model for wind speed.","PeriodicalId":379868,"journal":{"name":"2010 4th International Power Engineering and Optimization Conference (PEOCO)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123495033","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}
{"title":"Performance comparison of single-phase power electronic controllers","authors":"K. Samidurai, G. S. Ilango, K. Thanushkodi","doi":"10.1109/PEOCO.2010.5559210","DOIUrl":"https://doi.org/10.1109/PEOCO.2010.5559210","url":null,"abstract":"This paper systematically investigates and compares the performance characteristics of different electronic voltage regulators used for the speed control of single-phase capacitor-run fan motor. The voltage regulators considered for comparison are triac based voltage regulator, single pulse width modulated (SPWM) ac chopper, and electronic transformer based voltage regulator. The performance comparison is made among these regulators on the aspects of power quality and energy saving. It is found that the electronic transformer based voltage regulator scheme has superior operating and performance characteristics as compared to the other schemes. Experimental results show that apart from improvement in performance with respect to input power factor and total harmonic distortion (THD) an appreciable amount of energy saving is also obtained in the electronic transformer based scheme.","PeriodicalId":379868,"journal":{"name":"2010 4th International Power Engineering and Optimization Conference (PEOCO)","volume":"319 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123688874","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}
{"title":"An improved reconfiguration method for maximum loss reduction using Discrete Genetic algorithm","authors":"V. Farahani, S. Sadeghi, H. Askarian, K. Mazlumi","doi":"10.1109/PEOCO.2010.5559255","DOIUrl":"https://doi.org/10.1109/PEOCO.2010.5559255","url":null,"abstract":"This paper proposes an improved method for reconfiguration of distribution systems based on a simple branch exchange method of single loop. In some previous works for reconfiguration of distribution networks with several loops, loops are one by one selected and reconfiguration at each matched loop is performed according to the simple branch exchange method of the single loop. Although the loops selection sequence affects the optimal configuration and the power loss of the network, the loops selection sequence is not incorporated in the network reconfiguration problems up to now. In this paper, the sequence of the loops selection is optimized for the maximum loss reduction and a simple branch exchange method is employed for reconfiguration in each loop. Discrete Genetic algorithm is used to optimize the sequence of the loops selection. The proposed algorithm is effectively tested on two feeder of a real 77-bus distribution network of the city of Sirjan in Iran.","PeriodicalId":379868,"journal":{"name":"2010 4th International Power Engineering and Optimization Conference (PEOCO)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123772490","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}
N. A. M. Kamari, I. Musirin, Muhammad Murtadha Othman
{"title":"Application of evolutionary programming in the assessment of dynamic stability","authors":"N. A. M. Kamari, I. Musirin, Muhammad Murtadha Othman","doi":"10.1109/PEOCO.2010.5559248","DOIUrl":"https://doi.org/10.1109/PEOCO.2010.5559248","url":null,"abstract":"This paper presents Evolutionary Programming (EP) based optimization technique for estimating synchronizing torque coefficients, Ks and damping torque coefficients, Kd of a synchronous machine. These coefficients are used to identify the angle stability of a system. Initially, a Simulink model was utilized to generate the time domain response of rotor angle under various loading conditions. EP was then implemented to optimize the values of Ks and Kd within the same loading conditions. Validation with respect to eigenvalues determination confirmed that the proposed technique is feasible to solve the angle stability problems.","PeriodicalId":379868,"journal":{"name":"2010 4th International Power Engineering and Optimization Conference (PEOCO)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121820007","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}
{"title":"Implementing cooperative agent-based protection and outage management system for power distribution network control","authors":"I. Zabet, M. Montazeri","doi":"10.1109/PEOCO.2010.5559157","DOIUrl":"https://doi.org/10.1109/PEOCO.2010.5559157","url":null,"abstract":"In this paper, a wide research results upon the potentials of implementing Multi-Agent Systems (MAS) technology on Tehran-Iran power distribution network to gain high degrees of independency, is proposed. This work is in the area of agent-based and/or knowledge–based applications, distributed optimizations, distributed computing and expert systems. The proposed MAS is implemented using Java Agent DEvelopment Framework (JADE), which is fully accomplished in Java and compliant with Foundation of Intelligent Physical Agents (FIPA), also graph-theory-based expert systems implemented, which executed using PROgramming in LOGic (PROLOG), can be integrated with Java Integrated Development Environment (IDE). In order to power restoration decisions, Binary Knapsack Problem (KP) optimization algorithm is implemented with PROLOG. It is shown that, MAS technology's impact on outage management, upon medium-voltage (MV) power distribution lines, makes it be autonomously performing and effective cooperative. Since cooperation becomes more and more popular in software industry, the proposed MAS technology also offers modular, extensible, adaptable and versatile approach.","PeriodicalId":379868,"journal":{"name":"2010 4th International Power Engineering and Optimization Conference (PEOCO)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131510470","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}