Pub Date : 2012-10-01DOI: 10.1109/POWERCON.2012.6401354
Xiaorong Zhu, Wentong Zhang, Yi Wang, Haifeng Liang
As installed capacity of wind power retains a significant proportion of generation in the power system, the dispatch of wind power brings some new problems to the system. It is an effective way to increase the capabilities of wind farms to regulate active power for grid optimal dispatch support. Particle swarm algorithm is an excellent optimization algorithm for its robustness and versatility, and it has been widely used in the field of power system optimization in recent years. In this paper, an active power dispatch model of wind turbine generators is presented, in which the optimization objective is to minimize the line loss of the wind farm, and the particle swarm optimization algorithm is applied to solve the optimization function. Testing results show that this calculation method could track the power dispatch upon operator's request more accurately than the conventional distribution method, and the active power loss of wind farm can be reduced.
{"title":"Optimal dispatch of wind farm based on particle swarm optimization algorithm","authors":"Xiaorong Zhu, Wentong Zhang, Yi Wang, Haifeng Liang","doi":"10.1109/POWERCON.2012.6401354","DOIUrl":"https://doi.org/10.1109/POWERCON.2012.6401354","url":null,"abstract":"As installed capacity of wind power retains a significant proportion of generation in the power system, the dispatch of wind power brings some new problems to the system. It is an effective way to increase the capabilities of wind farms to regulate active power for grid optimal dispatch support. Particle swarm algorithm is an excellent optimization algorithm for its robustness and versatility, and it has been widely used in the field of power system optimization in recent years. In this paper, an active power dispatch model of wind turbine generators is presented, in which the optimization objective is to minimize the line loss of the wind farm, and the particle swarm optimization algorithm is applied to solve the optimization function. Testing results show that this calculation method could track the power dispatch upon operator's request more accurately than the conventional distribution method, and the active power loss of wind farm can be reduced.","PeriodicalId":176214,"journal":{"name":"2012 IEEE International Conference on Power System Technology (POWERCON)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125067578","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 : 2012-10-01DOI: 10.1109/POWERCON.2012.6401432
M. S. Reza, M. Ciobotaru, V. Agelidis
This paper proposes a robust, fast and accurate estimation technique for the tracking of time-varying grid voltage parameters. The proposed technique consists of a fundamental frequency tracking method based on a fixed window discrete Fourier transform (DFT) and a quadrature signal generator (QSG) based on a second order generalized integrator (SOGI) in order to track the fundamental amplitude and phase angle. The spectral leakage property of the fixed window DFT is used to track the time-varying fundamental frequency which is subsequently used as the resonance frequency of the QSG-SOGI to generate the orthogonal waveforms of the grid voltage fundamental component. The performance of the proposed DFT based SOGI technique is also compared with the frequency locked loop (FLL) based QSG-SOGI (SOGI-FLL), phase-locked loop (PLL) based on the QSG-SOGI (SOGI-PLL) and quadrature PLL (QPLL) techniques. The superior performance of the proposed technique is verified using synthetically generated grid voltage waveforms in MATLAB/Simulink.
{"title":"Tracking of time-varying grid voltage using DFT based second order generalized integrator technique","authors":"M. S. Reza, M. Ciobotaru, V. Agelidis","doi":"10.1109/POWERCON.2012.6401432","DOIUrl":"https://doi.org/10.1109/POWERCON.2012.6401432","url":null,"abstract":"This paper proposes a robust, fast and accurate estimation technique for the tracking of time-varying grid voltage parameters. The proposed technique consists of a fundamental frequency tracking method based on a fixed window discrete Fourier transform (DFT) and a quadrature signal generator (QSG) based on a second order generalized integrator (SOGI) in order to track the fundamental amplitude and phase angle. The spectral leakage property of the fixed window DFT is used to track the time-varying fundamental frequency which is subsequently used as the resonance frequency of the QSG-SOGI to generate the orthogonal waveforms of the grid voltage fundamental component. The performance of the proposed DFT based SOGI technique is also compared with the frequency locked loop (FLL) based QSG-SOGI (SOGI-FLL), phase-locked loop (PLL) based on the QSG-SOGI (SOGI-PLL) and quadrature PLL (QPLL) techniques. The superior performance of the proposed technique is verified using synthetically generated grid voltage waveforms in MATLAB/Simulink.","PeriodicalId":176214,"journal":{"name":"2012 IEEE International Conference on Power System Technology (POWERCON)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129894510","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 : 2012-10-01DOI: 10.1109/POWERCON.2012.6401415
X. Dai, Jia Shi, Yue Sun
In Inductively Coupled Power Transfer (TCPT) system, when system running in force resonant mode, there will exist dangerous short current between the resonant network and the switching network when switching frequency drifts away from inherent frequency of the resonant network. This paper proposes a short current control method to eliminate the short current by regulating the switching frequency to approach the inherent frequency. An instantaneous short current detection method and a mismatch error estimation method are proposed as well. The control method can be easily embedded in FPGA module to realize fast control. Experimental results verify the control method..
{"title":"Short current control method for inductively coupled power transfer system","authors":"X. Dai, Jia Shi, Yue Sun","doi":"10.1109/POWERCON.2012.6401415","DOIUrl":"https://doi.org/10.1109/POWERCON.2012.6401415","url":null,"abstract":"In Inductively Coupled Power Transfer (TCPT) system, when system running in force resonant mode, there will exist dangerous short current between the resonant network and the switching network when switching frequency drifts away from inherent frequency of the resonant network. This paper proposes a short current control method to eliminate the short current by regulating the switching frequency to approach the inherent frequency. An instantaneous short current detection method and a mismatch error estimation method are proposed as well. The control method can be easily embedded in FPGA module to realize fast control. Experimental results verify the control method..","PeriodicalId":176214,"journal":{"name":"2012 IEEE International Conference on Power System Technology (POWERCON)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129594749","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 : 2012-10-01DOI: 10.1109/POWERCON.2012.6401410
V. Siyoi, M. Nthontho, S. Chowdhury, S. Chowdhury
The complexities of power systems have called for more advanced technologies to be deployed to maintain the system's integrity. More accurate and real-time base tagging of electrical data has therefore been employed to suit this paradigm shifts in electrical advancements. This paper gives an overview of real-time wide area monitoring of power systems using synchroscopes, for remote monitoring and fast service recovery from electrical faults. This has been done through a comprehensive review of existing research literature in this field.
{"title":"Wide area monitoring for power system protection - a review","authors":"V. Siyoi, M. Nthontho, S. Chowdhury, S. Chowdhury","doi":"10.1109/POWERCON.2012.6401410","DOIUrl":"https://doi.org/10.1109/POWERCON.2012.6401410","url":null,"abstract":"The complexities of power systems have called for more advanced technologies to be deployed to maintain the system's integrity. More accurate and real-time base tagging of electrical data has therefore been employed to suit this paradigm shifts in electrical advancements. This paper gives an overview of real-time wide area monitoring of power systems using synchroscopes, for remote monitoring and fast service recovery from electrical faults. This has been done through a comprehensive review of existing research literature in this field.","PeriodicalId":176214,"journal":{"name":"2012 IEEE International Conference on Power System Technology (POWERCON)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130010669","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 : 2012-10-01DOI: 10.1109/POWERCON.2012.6401309
S. Zhu, M. Yang, X. S. Han
Wind generation forecast is important for power system operation, trading, and some other applications. In this paper, a practical approach for short-term wind generation forecast is proposed. The proposed approach uses Support Vector Machine (SVM) to produce the primary wind farm generation forecast results. However, since the residual error is assumed to be independently identically distributed (IID) in SVM, which ignores the strong volatility property of wind generation, a Generalized Autoregressive Conditional Heteroscedasticity (GARCH) model, which can predict the varying residual error, is used here to correct the SVM forecast results. The proposed approach can provide more reliable forecast results comparing with the usual SVM approach. Test results on two wind farms located in Heilongjiang Province in northeast China demonstrate the effectiveness of the proposed approach.
{"title":"Short-term generation forecast of wind farm using SVM-GARCH approach","authors":"S. Zhu, M. Yang, X. S. Han","doi":"10.1109/POWERCON.2012.6401309","DOIUrl":"https://doi.org/10.1109/POWERCON.2012.6401309","url":null,"abstract":"Wind generation forecast is important for power system operation, trading, and some other applications. In this paper, a practical approach for short-term wind generation forecast is proposed. The proposed approach uses Support Vector Machine (SVM) to produce the primary wind farm generation forecast results. However, since the residual error is assumed to be independently identically distributed (IID) in SVM, which ignores the strong volatility property of wind generation, a Generalized Autoregressive Conditional Heteroscedasticity (GARCH) model, which can predict the varying residual error, is used here to correct the SVM forecast results. The proposed approach can provide more reliable forecast results comparing with the usual SVM approach. Test results on two wind farms located in Heilongjiang Province in northeast China demonstrate the effectiveness of the proposed approach.","PeriodicalId":176214,"journal":{"name":"2012 IEEE International Conference on Power System Technology (POWERCON)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130031884","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 : 2012-10-01DOI: 10.1109/POWERCON.2012.6401401
D. H. Nguyen, M. Negnevitsky
Integration of wind power generation into the grid makes important impacts on power system planning and operation due to variable nature of the wind power. This paper proposes a probabilistic approach to assess the security of a power system with high wind penetration within operational context. The principal advantage of the proposed probabilistic security assessment approach is that, when compared to the traditional deterministic approach, it takes into account the uncertainties of both wind power generation and power demand. As a result, it provides a better understanding of the system security that may lead to better operational decision-making. A 5-bus test system is used as a case study to illustrate advantages of the proposed probabilistic approach.
{"title":"Probabilistic security assessment for power system operation with Significant Wind penetration","authors":"D. H. Nguyen, M. Negnevitsky","doi":"10.1109/POWERCON.2012.6401401","DOIUrl":"https://doi.org/10.1109/POWERCON.2012.6401401","url":null,"abstract":"Integration of wind power generation into the grid makes important impacts on power system planning and operation due to variable nature of the wind power. This paper proposes a probabilistic approach to assess the security of a power system with high wind penetration within operational context. The principal advantage of the proposed probabilistic security assessment approach is that, when compared to the traditional deterministic approach, it takes into account the uncertainties of both wind power generation and power demand. As a result, it provides a better understanding of the system security that may lead to better operational decision-making. A 5-bus test system is used as a case study to illustrate advantages of the proposed probabilistic approach.","PeriodicalId":176214,"journal":{"name":"2012 IEEE International Conference on Power System Technology (POWERCON)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130523955","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 : 2012-10-01DOI: 10.1109/POWERCON.2012.6401322
K. Kiran Kumar, N. Venkata Ramana, S. Kamakshaiah
This paper presents a new Adaptive Mutation Particle Swarm Optimization algorithm for minimization of losses of a Reconfigured Distribution Network. The tendency of solution being struck up to local optima or premature convergence as in the case of conventional PSO is thoroughly avoided using this new proposed technique. The algorithm is based on variance of population's fitness. During running time, the mutation probability is mainly based on variance of population's fitness and current optimal solution. The algorithm is tested on a standard IEEE 16 and 32 bus systems. The simulation results obtained and comparison with other popular existing methods is proving the effectiveness of this method.
{"title":"Global optimal solution for network reconfiguration problem using AMPSO algorithm","authors":"K. Kiran Kumar, N. Venkata Ramana, S. Kamakshaiah","doi":"10.1109/POWERCON.2012.6401322","DOIUrl":"https://doi.org/10.1109/POWERCON.2012.6401322","url":null,"abstract":"This paper presents a new Adaptive Mutation Particle Swarm Optimization algorithm for minimization of losses of a Reconfigured Distribution Network. The tendency of solution being struck up to local optima or premature convergence as in the case of conventional PSO is thoroughly avoided using this new proposed technique. The algorithm is based on variance of population's fitness. During running time, the mutation probability is mainly based on variance of population's fitness and current optimal solution. The algorithm is tested on a standard IEEE 16 and 32 bus systems. The simulation results obtained and comparison with other popular existing methods is proving the effectiveness of this method.","PeriodicalId":176214,"journal":{"name":"2012 IEEE International Conference on Power System Technology (POWERCON)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129222918","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 : 2012-10-01DOI: 10.1109/POWERCON.2012.6401369
Woei-Luen Chen, Yu-Ming Chiu, Zheng-Cong Li, Chia-Shin Yen, David Wu
This paper describes a systematic approach to the control design of voltage-sourced inverters (VSIs). The proposed method can unify voltage and current controllers into the system model based on the internal model principle. Not only the system dynamic can be characterized mathematically, but the control object can follow its reference input without incurring steady-state error. To further adapt the VSI controller over diverse operating points along with satisfactory performance, the control gains are scheduled corresponding to various loading conditions in order to achieve the desired time-domain specifications portrayed by closed-loop eigenvalues. The experimental results confirm the performance of the proposed strategy.
{"title":"A novel gain scheduling application for voltage-sourced inverters control based on internal model principle","authors":"Woei-Luen Chen, Yu-Ming Chiu, Zheng-Cong Li, Chia-Shin Yen, David Wu","doi":"10.1109/POWERCON.2012.6401369","DOIUrl":"https://doi.org/10.1109/POWERCON.2012.6401369","url":null,"abstract":"This paper describes a systematic approach to the control design of voltage-sourced inverters (VSIs). The proposed method can unify voltage and current controllers into the system model based on the internal model principle. Not only the system dynamic can be characterized mathematically, but the control object can follow its reference input without incurring steady-state error. To further adapt the VSI controller over diverse operating points along with satisfactory performance, the control gains are scheduled corresponding to various loading conditions in order to achieve the desired time-domain specifications portrayed by closed-loop eigenvalues. The experimental results confirm the performance of the proposed strategy.","PeriodicalId":176214,"journal":{"name":"2012 IEEE International Conference on Power System Technology (POWERCON)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126675058","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 : 2012-10-01DOI: 10.1109/POWERCON.2012.6401328
T. Jalal, N. Rashid, B. van Vliet
Unison Networks Limited is currently implementing Dynamic Transformer Rating (DTR) on most of the power transformers in its distribution network. The implementation involves 50 transformers across three different regions - Hawkes Bay, Taupo and Rotorua. The DTR scheme utilizes an in-house developed DTR algorithm that has been designed based on the IEC60076-7 Loading Guide for Oil Immersed Power Transformer Standard. The algorithm samples real time data from various sensors installed in the networks and translates them into dynamic rating and insulation loss of life information for each transformer.
{"title":"Implementation of Dynamic Transformer Rating in a distribution network","authors":"T. Jalal, N. Rashid, B. van Vliet","doi":"10.1109/POWERCON.2012.6401328","DOIUrl":"https://doi.org/10.1109/POWERCON.2012.6401328","url":null,"abstract":"Unison Networks Limited is currently implementing Dynamic Transformer Rating (DTR) on most of the power transformers in its distribution network. The implementation involves 50 transformers across three different regions - Hawkes Bay, Taupo and Rotorua. The DTR scheme utilizes an in-house developed DTR algorithm that has been designed based on the IEC60076-7 Loading Guide for Oil Immersed Power Transformer Standard. The algorithm samples real time data from various sensors installed in the networks and translates them into dynamic rating and insulation loss of life information for each transformer.","PeriodicalId":176214,"journal":{"name":"2012 IEEE International Conference on Power System Technology (POWERCON)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126816505","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 : 2012-10-01DOI: 10.1109/POWERCON.2012.6401250
R. Rayudu, R. Rigo-Mariani, M. Witherden
This paper discusses the results of experiments performed to analyze the effects of multiple compact fluorescent lamp usage on residential power quality. CFLs are quickly replacing incandescent lamps in home lighting but their effects as non-linear loads on residential power quality is unknown. We performed 15 sets of experiments with different CFLs and analyzed their harmonic interactions. The results provided interesting outcomes in terms of collective contribution and harmonic cancellation. Some of the results are tabulated in this paper and discussed.
{"title":"Effect of multiple compact fluorescent lamp usage on residential power quality","authors":"R. Rayudu, R. Rigo-Mariani, M. Witherden","doi":"10.1109/POWERCON.2012.6401250","DOIUrl":"https://doi.org/10.1109/POWERCON.2012.6401250","url":null,"abstract":"This paper discusses the results of experiments performed to analyze the effects of multiple compact fluorescent lamp usage on residential power quality. CFLs are quickly replacing incandescent lamps in home lighting but their effects as non-linear loads on residential power quality is unknown. We performed 15 sets of experiments with different CFLs and analyzed their harmonic interactions. The results provided interesting outcomes in terms of collective contribution and harmonic cancellation. Some of the results are tabulated in this paper and discussed.","PeriodicalId":176214,"journal":{"name":"2012 IEEE International Conference on Power System Technology (POWERCON)","volume":"20 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123813440","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}