Pub Date : 2012-09-13DOI: 10.1109/APCET.2012.6302073
K. Ravindra, R. S. Rao, S. Narasimham
Wind speed distribution analysis is essential for assessment of the wind energy potential and also performance of wind energy conversion system. Two-parameter Weibull is the commonly used Probability density function (PDF) to model wind speed distribution. Conventionally method of maximum likelihood (MLE) and method of moments (MOM) methods are used for parameter estimation. In this paper Artificial Bee Colony (ABC) algorithm is applied to compute shape and scale parameters of Weibull distribution function. Statistical parameters such as maximum error in the Kolmogorov-Smirnov test and coefficient of determination (R2) are considered as judgment criteria to test the goodness of fit of the Probability density function. Results show that parameter estimation incorporating Artificial Bee Colony (ABC) algorithm is better than conventional iterative solving of MLE and MOM methods.
{"title":"Wind distribution analysis incorporating Artificial Bee Colony Algorithm","authors":"K. Ravindra, R. S. Rao, S. Narasimham","doi":"10.1109/APCET.2012.6302073","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302073","url":null,"abstract":"Wind speed distribution analysis is essential for assessment of the wind energy potential and also performance of wind energy conversion system. Two-parameter Weibull is the commonly used Probability density function (PDF) to model wind speed distribution. Conventionally method of maximum likelihood (MLE) and method of moments (MOM) methods are used for parameter estimation. In this paper Artificial Bee Colony (ABC) algorithm is applied to compute shape and scale parameters of Weibull distribution function. Statistical parameters such as maximum error in the Kolmogorov-Smirnov test and coefficient of determination (R2) are considered as judgment criteria to test the goodness of fit of the Probability density function. Results show that parameter estimation incorporating Artificial Bee Colony (ABC) algorithm is better than conventional iterative solving of MLE and MOM methods.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134603539","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302038
P. S. Divya, M. Murali, M. S. Kumari, M. Sydulu
In deregulated electricity markets there is a strong need for effective allocation of fixed costs to market participants. The conventional usage based methods currently employed in market scenario may fail to send right economic signals. Hence in this paper, cooperative game theory is applied for power system fixed cost allocation. Increasing competition in the energy market can help maximize customers' payoffs. This can be achieved by applying game theory. In this regard, two solution methodologies such as Nucleolus and Shapley value are adopted in a Multilateral market. Both the methods have their pros and cons, while it can be inferred that Shapley value is a more preferable method when the solution is in the core of the game. In this paper, these methods are applied in case of IEEE 14 bus, New England 39 bus and Indian 75 bus power system and the results obtained are compared with the conventional usage based methods.
{"title":"Embedded cost allocation methods using game theory","authors":"P. S. Divya, M. Murali, M. S. Kumari, M. Sydulu","doi":"10.1109/APCET.2012.6302038","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302038","url":null,"abstract":"In deregulated electricity markets there is a strong need for effective allocation of fixed costs to market participants. The conventional usage based methods currently employed in market scenario may fail to send right economic signals. Hence in this paper, cooperative game theory is applied for power system fixed cost allocation. Increasing competition in the energy market can help maximize customers' payoffs. This can be achieved by applying game theory. In this regard, two solution methodologies such as Nucleolus and Shapley value are adopted in a Multilateral market. Both the methods have their pros and cons, while it can be inferred that Shapley value is a more preferable method when the solution is in the core of the game. In this paper, these methods are applied in case of IEEE 14 bus, New England 39 bus and Indian 75 bus power system and the results obtained are compared with the conventional usage based methods.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123486268","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302004
B. Hanumantha Rao, S. Sivanagaraju
Distributed generation (DG) is an emerging concept in the electricity sector, which represents good alternatives for electricity supply instead of the traditional centralized power generation concept. Distributed generation (DG) has been utilized in some electric power networks. Power loss reduction, environmental friendliness, voltage improvement, postponement of system upgrading, and increasing reliability are some advantages of DG-unit application. This paper investigates the problem of multiple distributed generators (DG units) placement to achieve a loss reduction in radial distribution networks. This technical benefit of energy savings due to the reduction in active power loss can also be translated into economic benefits. Clonal selection algorithm (CSA) is proposed to determine the optimal DG-unit's size and location is determined by loss sensitivity index (LSI) in order to maximize the net saving. Simulation studies are conducted on IEEE 33-bus and 69-bus radial test systems to verify the effectiveness of the proposed method. The efficacy of the proposed CSA is compared with existing ABC algorithm.
{"title":"Optimum allocation and sizing of distributed generations based on clonal selection algorithm for loss reduction and technical benefit of energy savings","authors":"B. Hanumantha Rao, S. Sivanagaraju","doi":"10.1109/APCET.2012.6302004","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302004","url":null,"abstract":"Distributed generation (DG) is an emerging concept in the electricity sector, which represents good alternatives for electricity supply instead of the traditional centralized power generation concept. Distributed generation (DG) has been utilized in some electric power networks. Power loss reduction, environmental friendliness, voltage improvement, postponement of system upgrading, and increasing reliability are some advantages of DG-unit application. This paper investigates the problem of multiple distributed generators (DG units) placement to achieve a loss reduction in radial distribution networks. This technical benefit of energy savings due to the reduction in active power loss can also be translated into economic benefits. Clonal selection algorithm (CSA) is proposed to determine the optimal DG-unit's size and location is determined by loss sensitivity index (LSI) in order to maximize the net saving. Simulation studies are conducted on IEEE 33-bus and 69-bus radial test systems to verify the effectiveness of the proposed method. The efficacy of the proposed CSA is compared with existing ABC algorithm.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125202048","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302074
K. Sushma, G. Raju, P. Upadhyay
Earthing is essential for electric supply system to ensure safety and proper operation. An effective earthing system depends on various factors like resistivity of surface layer of soil, duration and magnitude of fault current, maximum safe current that a human body can tolerate and the permissible earth potential rise that may take place due to fault current. There are basically six grounding systems in use. The soil resistivity can be determined with the well known three electrode method. An electrolytic tank of dimension 1×1×0.5m is fabricated in this department to experimentally compare the results with analytical values. There are empirical formulae given [1] to calculate the ground resistance at power frequency and under impulse current injection. The analytical values for the step and touch potentials for 220KV & 400KV are given in table II for grid size of 2m for a mat size of 60m×60m and 100m×100m. This data is used for optimal sizing of the grounding grid. The performance of this grid is then studied under impulse current injection using the method described in [2]. Based on the results, the discussions and conclusions are reported.
{"title":"Design of optimal grounding mats for high voltage substation","authors":"K. Sushma, G. Raju, P. Upadhyay","doi":"10.1109/APCET.2012.6302074","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302074","url":null,"abstract":"Earthing is essential for electric supply system to ensure safety and proper operation. An effective earthing system depends on various factors like resistivity of surface layer of soil, duration and magnitude of fault current, maximum safe current that a human body can tolerate and the permissible earth potential rise that may take place due to fault current. There are basically six grounding systems in use. The soil resistivity can be determined with the well known three electrode method. An electrolytic tank of dimension 1×1×0.5m is fabricated in this department to experimentally compare the results with analytical values. There are empirical formulae given [1] to calculate the ground resistance at power frequency and under impulse current injection. The analytical values for the step and touch potentials for 220KV & 400KV are given in table II for grid size of 2m for a mat size of 60m×60m and 100m×100m. This data is used for optimal sizing of the grounding grid. The performance of this grid is then studied under impulse current injection using the method described in [2]. Based on the results, the discussions and conclusions are reported.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"16 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129488605","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302057
J. Tukaram, S. S. Kumar, D. Ganesh, V. S. Kumar
In this paper, the unity power factor isolated three phase rectifier based on the Scott transformer is analyzed. This topology presents a Scott transformer for galvanic isolation and uses instantaneous current control. The various current control schemes like PI control, Hysteresis control and One cycle control are tested. The use of the Scott transformer makes a split dc-bus voltage possible and the rectifier operates with unity power factor. The proposed approach draws sinusoidal input current at unity power factor and has output voltage regulation capability. Using only two active switches, the rectifier is able to generate symmetrical currents in the line and a balanced split dc-bus output voltage, which is necessary in several applications. The control technique is independent for each boost that integrates the rectifier. Therefore, it makes possible with two single-phase boosts to obtain a unity power factor three-phase rectifier. This rectifier is particularly attractive when galvanic isolation and minimum number of active switches is required. Pulse width modulation and instantaneous average current control are used. There are two voltage controls that regulate the output voltage and the split dc-bus voltage. Complete simulation results under closed loop operation are presented.
{"title":"Investigation of PWM current mode controllers for UPF three phase - Rectifier with split DC bus based on the Scott transformer","authors":"J. Tukaram, S. S. Kumar, D. Ganesh, V. S. Kumar","doi":"10.1109/APCET.2012.6302057","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302057","url":null,"abstract":"In this paper, the unity power factor isolated three phase rectifier based on the Scott transformer is analyzed. This topology presents a Scott transformer for galvanic isolation and uses instantaneous current control. The various current control schemes like PI control, Hysteresis control and One cycle control are tested. The use of the Scott transformer makes a split dc-bus voltage possible and the rectifier operates with unity power factor. The proposed approach draws sinusoidal input current at unity power factor and has output voltage regulation capability. Using only two active switches, the rectifier is able to generate symmetrical currents in the line and a balanced split dc-bus output voltage, which is necessary in several applications. The control technique is independent for each boost that integrates the rectifier. Therefore, it makes possible with two single-phase boosts to obtain a unity power factor three-phase rectifier. This rectifier is particularly attractive when galvanic isolation and minimum number of active switches is required. Pulse width modulation and instantaneous average current control are used. There are two voltage controls that regulate the output voltage and the split dc-bus voltage. Complete simulation results under closed loop operation are presented.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125926022","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302052
S. A. Hussainy, R. Tandon, S. Kumar
This paper presents a systematic approach to the design of fixed frequency Pulse Width Modulation (PWM) Based Sliding Mode(SM) Control for DC-DC converters in Continuous Conduction Mode (CCM). The mathematical models of the DC-DC converters are used to design the sliding mode controllers. The design methodology is clearly illustrated for two converters viz. Boost and Bi-Directional Buck Converters. The theoretical analysis is verified by simulations to test the designed controllers for their response to load, line and voltage regulation.
{"title":"PWM Based Sliding Mode Control of DC-DC converters","authors":"S. A. Hussainy, R. Tandon, S. Kumar","doi":"10.1109/APCET.2012.6302052","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302052","url":null,"abstract":"This paper presents a systematic approach to the design of fixed frequency Pulse Width Modulation (PWM) Based Sliding Mode(SM) Control for DC-DC converters in Continuous Conduction Mode (CCM). The mathematical models of the DC-DC converters are used to design the sliding mode controllers. The design methodology is clearly illustrated for two converters viz. Boost and Bi-Directional Buck Converters. The theoretical analysis is verified by simulations to test the designed controllers for their response to load, line and voltage regulation.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"254 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134515089","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302050
M. S. Phebe, P. Satayanarayana
This paper presents application of fuzzy set theory and interval arithmetic for computing the branch currents, node voltages. First load currents at every node are estimated based on hourly load pattern of different types of consumers using fuzzy set theory. Once the fuzzy load currents at each node are estimated, then by using forward path information matrix the branch currents are computed using the concepts of arithmetic operations on closed intervals. Node voltages are computed using the simple relationship of sending end and receiving end voltages and using the concept of arithmetic operations on closed intervals. The effectiveness of the proposed method is demonstrated through an example. It is also compared with the general load estimation process.
{"title":"Comparison of general and fuzzy set load estimation in radial distribution network power flow","authors":"M. S. Phebe, P. Satayanarayana","doi":"10.1109/APCET.2012.6302050","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302050","url":null,"abstract":"This paper presents application of fuzzy set theory and interval arithmetic for computing the branch currents, node voltages. First load currents at every node are estimated based on hourly load pattern of different types of consumers using fuzzy set theory. Once the fuzzy load currents at each node are estimated, then by using forward path information matrix the branch currents are computed using the concepts of arithmetic operations on closed intervals. Node voltages are computed using the simple relationship of sending end and receiving end voltages and using the concept of arithmetic operations on closed intervals. The effectiveness of the proposed method is demonstrated through an example. It is also compared with the general load estimation process.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132229326","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302075
S. Kolla, J. Mainoo
In a Networked Control System (NCS), sensors, controllers and actuators are connected to the communication network as nodes instead of hardwiring them with point-to-point connections. These networks are also called Fieldbus Networks. The communication network may introduce time delays while exchanging data among devices connected to the shared network medium due to bus arbitration schemes used. These delays can degrade the system performance. The traditional controllers that do not consider the time delays in the design may not perform adequately when applied in NCS. In this paper the impact of these delays on closed loop control system performance measures such as stability, peak overshoot, and settling time are investigated. The paper demonstrates these effects on a control system with a Proportional, Integral, and Derivative (PID) controller using simulation of a DC motor model with MATLAB/Simulink software. A recent paper used the traditional Linear Quadratic Regulator (LQR) design with a delayed state and illustrated the degraded performance for a system with control over wireless networks. This paper suggests the use of a LQR design that takes delays into account for NCS which may not degrade the performance, and illustrates the improved results for a DC motor control system. The paper also studies the robust stability properties of these controllers.
{"title":"Effect of network-induced delays in control systems: Application to dc motor control","authors":"S. Kolla, J. Mainoo","doi":"10.1109/APCET.2012.6302075","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302075","url":null,"abstract":"In a Networked Control System (NCS), sensors, controllers and actuators are connected to the communication network as nodes instead of hardwiring them with point-to-point connections. These networks are also called Fieldbus Networks. The communication network may introduce time delays while exchanging data among devices connected to the shared network medium due to bus arbitration schemes used. These delays can degrade the system performance. The traditional controllers that do not consider the time delays in the design may not perform adequately when applied in NCS. In this paper the impact of these delays on closed loop control system performance measures such as stability, peak overshoot, and settling time are investigated. The paper demonstrates these effects on a control system with a Proportional, Integral, and Derivative (PID) controller using simulation of a DC motor model with MATLAB/Simulink software. A recent paper used the traditional Linear Quadratic Regulator (LQR) design with a delayed state and illustrated the degraded performance for a system with control over wireless networks. This paper suggests the use of a LQR design that takes delays into account for NCS which may not degrade the performance, and illustrates the improved results for a DC motor control system. The paper also studies the robust stability properties of these controllers.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133350151","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302064
K. Vijeta, D. Sarma
This paper discusses some aspects related to the connection of distributed generators to radial distribution systems, especially their impact on the protection coordination. Penetration of a DG into an existing distribution system has many impacts on the system, with the power system protection being one of the major issues. The relays in the power system have to be coordinated so as to avoid mal-operation and unnecessary outage of healthy part of the system. In this paper, the Overcurrent relay coordination of simple radial industrial power plant is presented using NEPLAN Software. It presents the short circuit analysis of radial industrial power plant. This paper shows the star view of relays which is unique feature of NEPLAN for coordinating them correctly based up on recorded data of industrial distribution plant for calculating short circuit currents in industrial power system. Results obtained are verified by manual calculation.
{"title":"Protection of distributed generation connected distribution system","authors":"K. Vijeta, D. Sarma","doi":"10.1109/APCET.2012.6302064","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302064","url":null,"abstract":"This paper discusses some aspects related to the connection of distributed generators to radial distribution systems, especially their impact on the protection coordination. Penetration of a DG into an existing distribution system has many impacts on the system, with the power system protection being one of the major issues. The relays in the power system have to be coordinated so as to avoid mal-operation and unnecessary outage of healthy part of the system. In this paper, the Overcurrent relay coordination of simple radial industrial power plant is presented using NEPLAN Software. It presents the short circuit analysis of radial industrial power plant. This paper shows the star view of relays which is unique feature of NEPLAN for coordinating them correctly based up on recorded data of industrial distribution plant for calculating short circuit currents in industrial power system. Results obtained are verified by manual calculation.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134098262","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 : 2012-09-13DOI: 10.1109/APCET.2012.6302007
M. Kumar, C. P. Gupta
In a deregulated electricity market, it may always not be possible to dispatch all of the contracted power transactions due to congestion of the transmission corridors. System operators try to manage congestion, which otherwise increases the cost of the electricity and also threatens the system security and stability. In this paper, congestion management by rescheduling of generators has been proposed in pool model without bilateral contracts and pool model with one bilateral contract, also compares the amount of rescheduling in both cases. For optimal selection of participating generators a technique based on generator sensitivities to the power flow of congested lines is used. Also this paper proposes an algorithm based on particle swarm optimization (PSO) which minimizes the deviations of rescheduled values of generator power outputs from scheduled levels. The effectiveness of the proposed methodology has been analyzed on IEEE 30-bus and IEEE 118-bus systems.
{"title":"Congestion management in a pool model with bilateral contract by generation rescheduling based on PSO","authors":"M. Kumar, C. P. Gupta","doi":"10.1109/APCET.2012.6302007","DOIUrl":"https://doi.org/10.1109/APCET.2012.6302007","url":null,"abstract":"In a deregulated electricity market, it may always not be possible to dispatch all of the contracted power transactions due to congestion of the transmission corridors. System operators try to manage congestion, which otherwise increases the cost of the electricity and also threatens the system security and stability. In this paper, congestion management by rescheduling of generators has been proposed in pool model without bilateral contracts and pool model with one bilateral contract, also compares the amount of rescheduling in both cases. For optimal selection of participating generators a technique based on generator sensitivities to the power flow of congested lines is used. Also this paper proposes an algorithm based on particle swarm optimization (PSO) which minimizes the deviations of rescheduled values of generator power outputs from scheduled levels. The effectiveness of the proposed methodology has been analyzed on IEEE 30-bus and IEEE 118-bus systems.","PeriodicalId":184844,"journal":{"name":"2012 International Conference on Advances in Power Conversion and Energy Technologies (APCET)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114686156","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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