{"title":"Adaptive backstepping control of separately excited DC motor with uncertainties","authors":"Jianguo Zhou, Youyi Wang, R. Zhou","doi":"10.1109/ICPST.2000.900037","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900037","url":null,"abstract":"In this paper, a nonlinear adaptive backstepping based speed controller is designed for the field weakening area of a separately excited DC motor. The nonlinear dynamic model of the motor is firstly derived, in which the parameter uncertainties such as the inertia and load torque are considered. Then by using a linear reference model to design the transient performance and through suitable nonlinear change of coordinates, a nonlinear adaptive backstepping control algorithm is derived step by step and the stability analysis is also carried out. The mechanical speed and the back EMF tracking objectives are satisfied. Simulation results clearly show that the proposed controller is of good performance and robust to the parameter uncertainties.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129724588","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":"Nonlinear power system damping control strategies for the unified power flow controller (UPFC)","authors":"T. Ma, K. Lo","doi":"10.1109/ICPST.2000.897103","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897103","url":null,"abstract":"In this paper, a nonlinear UPFC damping control strategy based on a combination of PI and fuzzy controllers is proposed to damp low frequency electromechanical power oscillations. The proposed control scheme coordinates the unique power flow control features in different control modes of a UPFC to allow the best damping effects to be achieved. The detailed system structure and design procedure of fuzzy controllers are addressed and discussed in full. Comprehensive computer simulations on a modified IEEE 9-bus test system have been carried out to verify the proposed control scheme. Simulation results reconfirm that the proposed control algorithm is practically implementable and the UPFC is the most powerful FACTS device which is able to provide flexible control functions required for the real-time power flow regulation and fast transient control of power systems.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123498874","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}
K. Okada, M. Kitamura, H. Asano, M. Ishimaru, R. Yokoyama
{"title":"Cost-benefit analysis of reliability management by transmission expansion planning in the competitive electric power market","authors":"K. Okada, M. Kitamura, H. Asano, M. Ishimaru, R. Yokoyama","doi":"10.1109/ICPST.2000.897109","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897109","url":null,"abstract":"Recently, a competitive electricity market has been introduced in many countries to improve the economic efficiency of power system operation. From the viewpoint of economic efficiency in the market, the establishment of a new rule for power system operation is indispensable for realizing open-access to the existing transmission network by nonutility generators. The overall objective of this study is to analyze planning for long-term transmission expansion for network reliability in the competitive market, and to assess transmission tariffs with regard to long-term and short-term economic efficiency. In this paper, a transmission expansion strategy for assuring network reliability is proposed in a hypothetical perfect competitive electricity market. The influence on social welfare of planned expansion of the transmission system and of congestion management operation of the network for the purpose of securing reliability is examined. The economic benefit of newly participating generators was shown when effective reliability maintenance measures were implemented.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116286930","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}
Yi Gu, Yiwei Zhang, Borning Zhang, H. Hashimoto, H. Taoka
{"title":"A novel approach for on-line transient stability assessment","authors":"Yi Gu, Yiwei Zhang, Borning Zhang, H. Hashimoto, H. Taoka","doi":"10.1109/ICPST.2000.900070","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900070","url":null,"abstract":"This paper investigates the transient stability assessment for an on-line application. It uses sensitivity analysis to evaluate the preventive actions to improve the dynamic security of a power system when a transient stability problem is detected. For operation planning and operation of a power system, generation re-dispatch and load shed are the possible control actions to enhance the security level. The coordination of these actions is necessary to prevent overestimated actions. Tests have been performed on the IEEE-39 bus system. It confirms that the proposed approach is applicable, accurate and fast.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127681490","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":"Fuzzy adaptive robust optimal controller to increase load following capability of nuclear reactors","authors":"M. N. Khajavi, M. B. Menhaj, A. Suratgar","doi":"10.1109/ICPST.2000.900041","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900041","url":null,"abstract":"Nuclear reactors are by nature nonlinear and their parameters vary with time as a function of power, fuel burnup, and control rod worth. In load following condition, when large power variations occur in power plant working regime, the aforementioned characteristics must be considered. In this paper a fuzzy adaptive robust optimal controller (FAROC) based on a proposed modified dynamic nonsingleton fuzzy logic system is presented. A robust optimal self-tuning regulator (ROSTR) response is used as a reference trajectory to determine the feedback, feedforward and observer gains of the fuzzy controller. The fuzzy controller displayed good stability and performance for a wide range of operation as well as considerable reduction in computation time in comparison with ROSTR.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126513612","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":"Neuro-fuzzy algorithms for power transformers diagnostics","authors":"O. Roizman, V. Davydov","doi":"10.1109/ICPST.2000.900065","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900065","url":null,"abstract":"There are a number of parameters and methods available for condition monitoring and diagnostic of a power transformer insulation. In this paper we concentrate on a few of them. One of the parameters, which becomes more and more vital for diagnostics of the integrity of a power transformer, is the moisture content of insulation system. Migration of moisture from oil to paper insulation is a very complex, nonlinear with many uncertainties process. The adaptive neuro-fuzzy system identification is applied to predict moisture characteristics of oil. The comparison of the measured and predicted values of average moisture content in paper-oil insulation system is presented. The accurate evaluation of moisture content is extremely important when it is necessary to determine the dryness of the solid insulation during both the factory drying process and refurbishment of the transformer in field. The dry-out termination criteria based on the measurement of dielectric characteristics and classification of the dryness state by using the neuro-fuzzy pattern clustering is suggested for this purpose.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128135081","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}
K. Ichiyanagi, Y. Goto, K. Yukita, T. Kato, H. Yamada
{"title":"Study of power system transient stability using FACTS and SDR","authors":"K. Ichiyanagi, Y. Goto, K. Yukita, T. Kato, H. Yamada","doi":"10.1109/ICPST.2000.900115","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900115","url":null,"abstract":"Electric power systems are becoming more and more complex and large-scale. Therefore, stabilization and voltage stability problems of power system are taken seriously. In this paper, by using the FACTS technology, the new system stabilizing technique was proposed, and the following were executed: computer simulation and experiment using transmission simulator. The effectiveness for the stabilization was shown in that a system swing was damped by the on-off control of the parallel and serial resistor.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134019790","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":"A simple distribution reconfiguration algorithm for loss minimization","authors":"H. Chin, Kun-Yuan Huang","doi":"10.1109/ICPST.2000.897092","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897092","url":null,"abstract":"This paper presents a ranking method to solve the distribution feeder reconfiguration problem for loss reduction. A more efficient network configuration can be obtained to reduce loss by using this proposed algorithm. According to the bus voltages, a \"boundary set\" was defined in this paper. Through the ranking index for each boundary set in each closed loop, the on-off switch states can be determined. Meshed networks were considered instead of the radial topology by closing all the tie switches. By considering only the smallest ranking index in the boundary sets, this algorithm can reduce the number of feasible states drastically. Tests to many practical networks show that the desired switching operations can be reached in a very efficient manner by using this algorithm.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134373491","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":"The effect of net harmonic currents produced by numbers of the Sydney Olympic Village's PV systems on the power quality of local electrical network","authors":"E. Vasanasong, E. Spooner","doi":"10.1109/ICPST.2000.897157","DOIUrl":"https://doi.org/10.1109/ICPST.2000.897157","url":null,"abstract":"This paper presents a method for predicting the effect of net harmonic currents produced by numbers of residential PV inverters on the power quality of a low voltage electrical network. Simple experimental based models of a PV inverter, which have been installed at the Sydney Olympic Village, are described. The effect of background harmonic voltages, input current from PV arrays and also randomness in individual inverter's harmonic performances are taken into account. The study includes the harmonic measurement, data analysis, statistical analysis, mathematical modeling technique and simulations. The results of measurement from the Sydney Olympic Village and UNSW lab are compared to the simulation to confirm the accuracy of the models. Those results also show that harmonic voltages at the Olympic Village are far below both the IEEE 519-1992 and Australian Standard limits even after the operation of all PV inverter systems in the solar village (1.9%), and ready for the Sydney 2000 Olympic Games.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131610839","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}
Luonan Chen, A. Ono, Y. Tada, H. Okamoto, R. Tanabe
{"title":"Optimal power flow constrained by transient stability","authors":"Luonan Chen, A. Ono, Y. Tada, H. Okamoto, R. Tanabe","doi":"10.1109/ICPST.2000.900022","DOIUrl":"https://doi.org/10.1109/ICPST.2000.900022","url":null,"abstract":"In this paper, optimal power flow (OPF) with transient stability constraints is equivalently converted into an optimization problem with finite dimensions, which can be solved by any standard nonlinear programming techniques adopted by OPF. The transformed problem has the same variables as those of OPF in form, and is tractable even for the large scale power systems with a large number of transient stability constraints.","PeriodicalId":330989,"journal":{"name":"PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409)","volume":"253 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132808243","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}