Pub Date : 2000-04-04DOI: 10.1109/DRPT.2000.855734
T. Chan, L. Lai
This paper describes a phase-balancing scheme for a three-phase self-excited induction generator (SEIG) which supplies single-phase loads. It is demonstrated that perfect phase balance can be achieved using a modified Steinmetz connection, provided that the positive-sequence impedance angle of the SEIG exceeds 2/spl pi//3 rad. From the phasor diagram, the conditions for perfect balance are established. It is found that the values of phase converter elements as well as the load resistance are functions of the positive-sequence admittance and impedance angle of the induction generator. Using the method of symmetrical components, the input impedance of the SEIG can be determined and solution of the equivalent circuit is formulated as a function minimization problem. The pattern search method of Hooke and Jeeves is employed for minimizing the impedance function, which enables the machine variables to be determined. It is further shown that, when the auxiliary load resistance is absent, perfect phase balance can still be achieved when the impedance angle of the SEIG is equal to 2/spl pi//3 rad. Feasibility of the phase-balancing schemes and the validity of the theoretical analysis are confirmed by experiments on a 2.2 kW induction machine.
{"title":"Phase balancing for a self-excited induction generator","authors":"T. Chan, L. Lai","doi":"10.1109/DRPT.2000.855734","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855734","url":null,"abstract":"This paper describes a phase-balancing scheme for a three-phase self-excited induction generator (SEIG) which supplies single-phase loads. It is demonstrated that perfect phase balance can be achieved using a modified Steinmetz connection, provided that the positive-sequence impedance angle of the SEIG exceeds 2/spl pi//3 rad. From the phasor diagram, the conditions for perfect balance are established. It is found that the values of phase converter elements as well as the load resistance are functions of the positive-sequence admittance and impedance angle of the induction generator. Using the method of symmetrical components, the input impedance of the SEIG can be determined and solution of the equivalent circuit is formulated as a function minimization problem. The pattern search method of Hooke and Jeeves is employed for minimizing the impedance function, which enables the machine variables to be determined. It is further shown that, when the auxiliary load resistance is absent, perfect phase balance can still be achieved when the impedance angle of the SEIG is equal to 2/spl pi//3 rad. Feasibility of the phase-balancing schemes and the validity of the theoretical analysis are confirmed by experiments on a 2.2 kW induction machine.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123643126","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855661
Xie Kai, Y. Song
Spot pricing has been introduced in the power market in order to induce load shifts to achieve the aims of load management strategies. In order to ensure the successful introduction of such a pricing scheme, it is important to include accurate load-price elasticity models in optimal power flow based marginal cost calculation methodologies by making minor modifications. This paper builds up the demand-price elasticity model in the context of interior point method based optimal power flow algorithm. No extra unknowns are introduced and the modifications are limited to the diagonal entries of an augmented Hessian matrix. Moreover, the proposed method is extended to a multi-period time horizon, the effects of cross-time load shifting can therefore be accounted for. Numerical results are given to demonstrate the efficiency of the proposed method.
{"title":"Optimal demand-price elasticity modelling in optimal power flow via a nonlinear interior point method","authors":"Xie Kai, Y. Song","doi":"10.1109/DRPT.2000.855661","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855661","url":null,"abstract":"Spot pricing has been introduced in the power market in order to induce load shifts to achieve the aims of load management strategies. In order to ensure the successful introduction of such a pricing scheme, it is important to include accurate load-price elasticity models in optimal power flow based marginal cost calculation methodologies by making minor modifications. This paper builds up the demand-price elasticity model in the context of interior point method based optimal power flow algorithm. No extra unknowns are introduced and the modifications are limited to the diagonal entries of an augmented Hessian matrix. Moreover, the proposed method is extended to a multi-period time horizon, the effects of cross-time load shifting can therefore be accounted for. Numerical results are given to demonstrate the efficiency of the proposed method.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127247657","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855733
E. Dialynas, S.M. Megalokonomos, D. Agoris
The power supply interruptions to the customers of a power system constitute a reduction of the respective level of system reliability. An optimal operation plan is required that achieves minimum system operating and customer interruption costs. The purpose of the paper is to describe an efficient and improved computational methodology for evaluating the costs of interruption and, hence, the reliability worth in power transmission networks considering the time varying loads and the type of customers at each load bus. This methodology was developed applying the Monte-Carlo sequential simulation approach and recognises the interruption costs at different buses for various types of customers. A number of case studies were conducted using the IEEE Reliability Test System (RTS) and the obtained results are presented and discussed.
{"title":"Reliability cost assessment of power transmission networks using the Monte Carlo simulation approach","authors":"E. Dialynas, S.M. Megalokonomos, D. Agoris","doi":"10.1109/DRPT.2000.855733","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855733","url":null,"abstract":"The power supply interruptions to the customers of a power system constitute a reduction of the respective level of system reliability. An optimal operation plan is required that achieves minimum system operating and customer interruption costs. The purpose of the paper is to describe an efficient and improved computational methodology for evaluating the costs of interruption and, hence, the reliability worth in power transmission networks considering the time varying loads and the type of customers at each load bus. This methodology was developed applying the Monte-Carlo sequential simulation approach and recognises the interruption costs at different buses for various types of customers. A number of case studies were conducted using the IEEE Reliability Test System (RTS) and the obtained results are presented and discussed.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115558231","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855713
V. Petrov, C. Richter, G. Sheblé
The recent deregulation of the electric industry in the United States opened some sectors of the power market to competition. Buyers and sellers of electric power are competing for limited resources. Although regulations exist attempting to limit such activity, when large amounts of money are at stake, the participants have incentives to engage in predatory behavior. The goal of this study is to model an agent driven bilateral power market auction where some of the players attempt to benefit from causing instabilities like brownouts and blackouts, as well as economic instabilities by applying different gaming strategies. The market structure is similar to the California power market. The network considered consists of six generators in three zones and two loads connected by a six bus power network. An independent entity takes care of the congestion management as well of allocation of the available resources. One of the companies engages in predatory behavior, using the congestion management policies combined with carefully chosen bids to cut off one or more of the generators of the other company. Vulnerabilities associated with shutdown and startup costs, minimum up and downtimes, ramp rate and generator limits for each generator, are utilized to achieve market destabilization. Customers may be negatively impacted by the predatory behavior, since reducing the power delivered to a customer is sometimes the best solution to the total congestion management optimization problem.
{"title":"Predatory gaming strategies for electric power markets","authors":"V. Petrov, C. Richter, G. Sheblé","doi":"10.1109/DRPT.2000.855713","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855713","url":null,"abstract":"The recent deregulation of the electric industry in the United States opened some sectors of the power market to competition. Buyers and sellers of electric power are competing for limited resources. Although regulations exist attempting to limit such activity, when large amounts of money are at stake, the participants have incentives to engage in predatory behavior. The goal of this study is to model an agent driven bilateral power market auction where some of the players attempt to benefit from causing instabilities like brownouts and blackouts, as well as economic instabilities by applying different gaming strategies. The market structure is similar to the California power market. The network considered consists of six generators in three zones and two loads connected by a six bus power network. An independent entity takes care of the congestion management as well of allocation of the available resources. One of the companies engages in predatory behavior, using the congestion management policies combined with carefully chosen bids to cut off one or more of the generators of the other company. Vulnerabilities associated with shutdown and startup costs, minimum up and downtimes, ramp rate and generator limits for each generator, are utilized to achieve market destabilization. Customers may be negatively impacted by the predatory behavior, since reducing the power delivered to a customer is sometimes the best solution to the total congestion management optimization problem.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115093781","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855727
J. Slootweg
In this paper, first the influence of both restructuring and technological innovation on the planning of power systems is explained. It is shown that as a result of restructuring and technological innovation, the complexity of power system planning increases in two ways. Restructuring leads to an increase in the number of criteria that have to be used to evaluate different possible solutions. Technological innovation leads to an increase in the number of alternative solutions. The second topic addressed in this paper is the applicability of approaches and insights from engineering design to power system planning. A number of concepts that are considered to be the core of engineering design are identified. Then, the applicability of these concepts to both generation and transmission planning, separated tasks after the restructuring of the electricity industry, is investigated. It is argued that some engineering design concepts can be applied advantageously to power system planning, whereas others are less useful because of the organizational setting or the technical characteristics of power systems.
{"title":"Applicability of engineering design concepts to power system planning and operation","authors":"J. Slootweg","doi":"10.1109/DRPT.2000.855727","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855727","url":null,"abstract":"In this paper, first the influence of both restructuring and technological innovation on the planning of power systems is explained. It is shown that as a result of restructuring and technological innovation, the complexity of power system planning increases in two ways. Restructuring leads to an increase in the number of criteria that have to be used to evaluate different possible solutions. Technological innovation leads to an increase in the number of alternative solutions. The second topic addressed in this paper is the applicability of approaches and insights from engineering design to power system planning. A number of concepts that are considered to be the core of engineering design are identified. Then, the applicability of these concepts to both generation and transmission planning, separated tasks after the restructuring of the electricity industry, is investigated. It is argued that some engineering design concepts can be applied advantageously to power system planning, whereas others are less useful because of the organizational setting or the technical characteristics of power systems.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128240758","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855730
G. Levitin, A. Lisnianski, H. B. Haim, D. Elmakis
To provide a required level of power system reliability, redundant elements are included. Usually engineers try to achieve this level with minimal cost. The problem of total investment cost minimization, subject to reliability constraints, is well known as the redundancy optimization problem. When applied to power systems (PS), reliability is considered as a measure of the ability of the system to meet the load demand, i.e. to provide an adequate supply of electrical energy. In this case the outage effect will be essentially different for units with different nominal generating (transmitting) capacity. It will also depend on consumer demand. Therefore the capacities of PS components should be taken into account as well as the consumer load curve. To solve the redundancy optimization problem for a system with different element capacities, a genetic algorithm is used which is a technique inspired by a principle of evolution. A procedure based on the universal generating function method is used for fast reliability estimation of multi-state PS with series-parallel structure. Using the composition of the genetic algorithm and the universal generating function technique provides solutions of the following problems of reliability optimization of series-parallel multi-state PS: structure optimization subject to reliability constraints, optimal expansion, maintenance optimization and optimal multistage modernization.
{"title":"Genetic algorithm and universal generating function technique for solving problems of power system reliability optimization","authors":"G. Levitin, A. Lisnianski, H. B. Haim, D. Elmakis","doi":"10.1109/DRPT.2000.855730","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855730","url":null,"abstract":"To provide a required level of power system reliability, redundant elements are included. Usually engineers try to achieve this level with minimal cost. The problem of total investment cost minimization, subject to reliability constraints, is well known as the redundancy optimization problem. When applied to power systems (PS), reliability is considered as a measure of the ability of the system to meet the load demand, i.e. to provide an adequate supply of electrical energy. In this case the outage effect will be essentially different for units with different nominal generating (transmitting) capacity. It will also depend on consumer demand. Therefore the capacities of PS components should be taken into account as well as the consumer load curve. To solve the redundancy optimization problem for a system with different element capacities, a genetic algorithm is used which is a technique inspired by a principle of evolution. A procedure based on the universal generating function method is used for fast reliability estimation of multi-state PS with series-parallel structure. Using the composition of the genetic algorithm and the universal generating function technique provides solutions of the following problems of reliability optimization of series-parallel multi-state PS: structure optimization subject to reliability constraints, optimal expansion, maintenance optimization and optimal multistage modernization.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128831344","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855670
Y. Tang, H.F. Wang, R. Aggarwal, A. Johns
Fault location techniques can be classified under three categories: (1) those based on fundamental frequency currents and voltages; (2) those based on travelling wave and high frequency components; and (3) those based on knowledge-based approaches. Fault indicators can be installed either in substation or on pole/tower along the transmission line. This paper reviews the fault indicator applications both in transmission and distribution systems. Principles, merits and demerits of each fault location technique are discussed. Finally, this paper suggests an advanced fault indicator based on fault generated high frequency noise signal (FI-HF), which is mounted between earth wire and tower. Fault generated high frequency noise signal is captured by a special designed "earth trap" and stack tuner.
{"title":"Fault indicators in transmission and distribution systems","authors":"Y. Tang, H.F. Wang, R. Aggarwal, A. Johns","doi":"10.1109/DRPT.2000.855670","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855670","url":null,"abstract":"Fault location techniques can be classified under three categories: (1) those based on fundamental frequency currents and voltages; (2) those based on travelling wave and high frequency components; and (3) those based on knowledge-based approaches. Fault indicators can be installed either in substation or on pole/tower along the transmission line. This paper reviews the fault indicator applications both in transmission and distribution systems. Principles, merits and demerits of each fault location technique are discussed. Finally, this paper suggests an advanced fault indicator based on fault generated high frequency noise signal (FI-HF), which is mounted between earth wire and tower. Fault generated high frequency noise signal is captured by a special designed \"earth trap\" and stack tuner.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123913586","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855653
S. Dekrajangpetch, G. Sheblé
Auction results reflect the market condition at the time the auction is performed. The market condition consists not only of electricity demand and supply at that period, but also includes the transmission network condition at that period. The network condition plays a major role in the auction results. If some transmission lines are congested, it can interfere with the desired operation of the network; e.g., block the transaction from the inexpensive sources to the high demand areas. Because of these reasons, an independent contract administrator (ICA) may wish to consider auction results when making decisions related to power system expansion. This work outlines a framework of applying a decision analysis approach to the auction results in selecting the expansion plan for the system.
{"title":"Application of auction results to power system expansion","authors":"S. Dekrajangpetch, G. Sheblé","doi":"10.1109/DRPT.2000.855653","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855653","url":null,"abstract":"Auction results reflect the market condition at the time the auction is performed. The market condition consists not only of electricity demand and supply at that period, but also includes the transmission network condition at that period. The network condition plays a major role in the auction results. If some transmission lines are congested, it can interfere with the desired operation of the network; e.g., block the transaction from the inexpensive sources to the high demand areas. Because of these reasons, an independent contract administrator (ICA) may wish to consider auction results when making decisions related to power system expansion. This work outlines a framework of applying a decision analysis approach to the auction results in selecting the expansion plan for the system.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123188214","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855656
T. Berry
This paper introduces draft IEC standard 61970. This standard develops the guidelines and information model produced by the EPRI Control Centre Application Program Interface (CCAPI) project. The first part of the standard is a reference model describing the expected architecture and listing the major categories of applications. The major work completed is a common information model that is an object-oriented representation of a power system as viewed by energy management systems. One part describes physical based entities such as substation and conducting equipment. This model of network equipment and connectivity can also be used within distribution management systems. Other parts describe abstract entities related to the financial and scheduling data required for deregulated operation of power systems. Work is continuing to define the component interface standards for each of the application categories. This work is using a software design process that analyses the information exchanges described in use cases.
{"title":"Standards for energy management system application program interfaces","authors":"T. Berry","doi":"10.1109/DRPT.2000.855656","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855656","url":null,"abstract":"This paper introduces draft IEC standard 61970. This standard develops the guidelines and information model produced by the EPRI Control Centre Application Program Interface (CCAPI) project. The first part of the standard is a reference model describing the expected architecture and listing the major categories of applications. The major work completed is a common information model that is an object-oriented representation of a power system as viewed by energy management systems. One part describes physical based entities such as substation and conducting equipment. This model of network equipment and connectivity can also be used within distribution management systems. Other parts describe abstract entities related to the financial and scheduling data required for deregulated operation of power systems. Work is continuing to define the component interface standards for each of the application categories. This work is using a software design process that analyses the information exchanges described in use cases.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116085695","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 : 2000-04-04DOI: 10.1109/DRPT.2000.855703
J. Machowski, S. Robak, J. Bialek, J. Bumby
This paper describes a new structure for a stability-enhancing excitation controller designed using a nonlinear multimachine system model and Lyapunov's direct method. The controller is shown to be robust, as the damping it introduces into the system is insensitive to changes in both the system topology/parameters and the pattern of network flows. Each individual controller contributes positively to the overall system damping with no undesirable interaction between controllers. These features should allow a decentralised approach to the design of the AVR+PSS. Such a design approach is compatible with the new competitive market structures and should result in savings on commissioning costs. Simulation results for a multi-machine power system confirmed that the controllers are effective in damping local and inter-area power swings.
{"title":"Decentralised Lyapunov-based power system stabiliser","authors":"J. Machowski, S. Robak, J. Bialek, J. Bumby","doi":"10.1109/DRPT.2000.855703","DOIUrl":"https://doi.org/10.1109/DRPT.2000.855703","url":null,"abstract":"This paper describes a new structure for a stability-enhancing excitation controller designed using a nonlinear multimachine system model and Lyapunov's direct method. The controller is shown to be robust, as the damping it introduces into the system is insensitive to changes in both the system topology/parameters and the pattern of network flows. Each individual controller contributes positively to the overall system damping with no undesirable interaction between controllers. These features should allow a decentralised approach to the design of the AVR+PSS. Such a design approach is compatible with the new competitive market structures and should result in savings on commissioning costs. Simulation results for a multi-machine power system confirmed that the controllers are effective in damping local and inter-area power swings.","PeriodicalId":127287,"journal":{"name":"DRPT2000. International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Proceedings (Cat. No.00EX382)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132890949","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}
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