Pub Date : 2012-05-21DOI: 10.1109/ISGT-ASIA.2012.6303368
ZhaoXing Zeng, Chun Huang, J. Cheng, Shuo Qu, Qian Qin
A power quality disturbance classification method based on modified S-transform (MST) and multi-classification support vector machine (SVM) is proposed in this paper. Firstly, the MST, which introduces two regulatory factors into traditional S-transform and obtains proper time and frequency resolution, is detailed. Then, the time-frequency matrix model is obtained through MST time-frequency analysis on the 7 kinds of common power quality disturbance signals, which include swell, sag, interruption, oscillatory, spike, notch, and harmonics. Furthermore, 11 features of time-domain and frequency-domain are extracted from the matrix model. Finally, the extracted features are sent into multi-class SVM to achieve automatic classification. The simulation results indicate that the proposed method not only can avoid the unchangeable and fixed varying patterns of the window in ST with practicability and adaptability, but also is an effective method for power quality disturbances classification.
{"title":"Power quality disturbance classification with multi-classification SVM based on MST","authors":"ZhaoXing Zeng, Chun Huang, J. Cheng, Shuo Qu, Qian Qin","doi":"10.1109/ISGT-ASIA.2012.6303368","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303368","url":null,"abstract":"A power quality disturbance classification method based on modified S-transform (MST) and multi-classification support vector machine (SVM) is proposed in this paper. Firstly, the MST, which introduces two regulatory factors into traditional S-transform and obtains proper time and frequency resolution, is detailed. Then, the time-frequency matrix model is obtained through MST time-frequency analysis on the 7 kinds of common power quality disturbance signals, which include swell, sag, interruption, oscillatory, spike, notch, and harmonics. Furthermore, 11 features of time-domain and frequency-domain are extracted from the matrix model. Finally, the extracted features are sent into multi-class SVM to achieve automatic classification. The simulation results indicate that the proposed method not only can avoid the unchangeable and fixed varying patterns of the window in ST with practicability and adaptability, but also is an effective method for power quality disturbances classification.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129105851","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 : 2012-05-21DOI: 10.1109/ISGT-ASIA.2012.6303285
G. Qiang, Ge Weichun, Wang Chenggang, Zhang Jun Yang, G. Baohong, J. Xiuchen
With the fast development of the smart grid technology in china, more and more attentions were paid to the condition-based maintenance of the high voltage equipment. To realize the objectives, the standardizations of the online monitoring system hierarchy structure and function are the key steps in the development of the online monitoring system in pilot smart substation project. According to the relevant published online monitoring standards, technical guides and solutions, this paper first introduces the basic structure and function of the high voltage online monitoring system of the smart substation. After that, the detail terms about the monitoring device, comprehensive monitoring unit, substation monitoring unit and communication protocols were covered respectively. To implement the design solution of the online monitoring system, based on a newly built pilot 500kV smart substation project, a pilot transformation equipment online monitoring system and its features were presented.
{"title":"High voltage equipment online monitoring system of smart substation","authors":"G. Qiang, Ge Weichun, Wang Chenggang, Zhang Jun Yang, G. Baohong, J. Xiuchen","doi":"10.1109/ISGT-ASIA.2012.6303285","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303285","url":null,"abstract":"With the fast development of the smart grid technology in china, more and more attentions were paid to the condition-based maintenance of the high voltage equipment. To realize the objectives, the standardizations of the online monitoring system hierarchy structure and function are the key steps in the development of the online monitoring system in pilot smart substation project. According to the relevant published online monitoring standards, technical guides and solutions, this paper first introduces the basic structure and function of the high voltage online monitoring system of the smart substation. After that, the detail terms about the monitoring device, comprehensive monitoring unit, substation monitoring unit and communication protocols were covered respectively. To implement the design solution of the online monitoring system, based on a newly built pilot 500kV smart substation project, a pilot transformation equipment online monitoring system and its features were presented.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131061402","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 : 2012-05-21DOI: 10.1109/ISGT-ASIA.2012.6303235
Wei Sun, Pei Zhang, Qun Zhou
Self-healing is a critical and desirable feature for electric power systems. Following an outage, it is critical to restore system back to a normal operation condition as efficiently as possible. The advanced decision support tools are needed to assist system operators to restore a grid from major outages efficiently and safely and enhance the resilience of a smart grid. In this paper, optimization modules are developed for generation, transmission and distribution system restoration. These developed modules provide an automated and “best adaptive strategy” procedure for power system restoration. The IEEE 39-bus test system is used to validate the proposed strategy. Simulation results demonstrate that the proposed optimization-based power system restoration strategy is highly efficient. Future developments are discussed for extensive testing, implementation planning, and actual implementation in a real-time operational environment.
{"title":"Optimization-based strategies towards a self-healing smart grid","authors":"Wei Sun, Pei Zhang, Qun Zhou","doi":"10.1109/ISGT-ASIA.2012.6303235","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303235","url":null,"abstract":"Self-healing is a critical and desirable feature for electric power systems. Following an outage, it is critical to restore system back to a normal operation condition as efficiently as possible. The advanced decision support tools are needed to assist system operators to restore a grid from major outages efficiently and safely and enhance the resilience of a smart grid. In this paper, optimization modules are developed for generation, transmission and distribution system restoration. These developed modules provide an automated and “best adaptive strategy” procedure for power system restoration. The IEEE 39-bus test system is used to validate the proposed strategy. Simulation results demonstrate that the proposed optimization-based power system restoration strategy is highly efficient. Future developments are discussed for extensive testing, implementation planning, and actual implementation in a real-time operational environment.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132153411","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 : 2012-05-21DOI: 10.1109/ISGT-ASIA.2012.6303249
Wenxia Liu, M. Zhang, B. Zeng, Linwei Wu, Jianhua Zhang
Currently the development of large scale electric vehicles have become governments' focus of attention. Based on the research of charging and discharging power models, the paper puts forward the island formation strategy and establishes the distribution system reliability model with the electric vehicles. The Monte Carlo time sequential simulation is used to evaluate the effects of different vehicle types, locations and penetration on the reliability of IEEE-RBTS Bus6 system. The conclusion could be used as references to the electric vehicle development.
{"title":"Analyzing the impacts of electric vehicle charging on distribution system reliability","authors":"Wenxia Liu, M. Zhang, B. Zeng, Linwei Wu, Jianhua Zhang","doi":"10.1109/ISGT-ASIA.2012.6303249","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303249","url":null,"abstract":"Currently the development of large scale electric vehicles have become governments' focus of attention. Based on the research of charging and discharging power models, the paper puts forward the island formation strategy and establishes the distribution system reliability model with the electric vehicles. The Monte Carlo time sequential simulation is used to evaluate the effects of different vehicle types, locations and penetration on the reliability of IEEE-RBTS Bus6 system. The conclusion could be used as references to the electric vehicle development.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127954199","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 : 2012-05-21DOI: 10.1109/ISGT-ASIA.2012.6303321
Zhaojie Sun, B. Duan
The advent of IEC 61850 provided generic hardware platforms with a standard communication interface and left remaining problem is the unified function model that can specifies various software components and provides a framework to integrate them efficiently. The standard function blocks method can provides the unified function model. In this paper we report on the architecture specifies a design template for the executable reservation interlocking scenario. The design makes the reservation interlocking modules executable and integration repeatable, provides for the seamless distribution application and the reuse of the configuration when the same instance occurs. The system of reservation interlocking is simulated in an IEC 61499 execution environment FBDK conducted to prove the feasibility and flexibility of using function blocks method.
{"title":"The design of function block in IED with digital substation operation","authors":"Zhaojie Sun, B. Duan","doi":"10.1109/ISGT-ASIA.2012.6303321","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303321","url":null,"abstract":"The advent of IEC 61850 provided generic hardware platforms with a standard communication interface and left remaining problem is the unified function model that can specifies various software components and provides a framework to integrate them efficiently. The standard function blocks method can provides the unified function model. In this paper we report on the architecture specifies a design template for the executable reservation interlocking scenario. The design makes the reservation interlocking modules executable and integration repeatable, provides for the seamless distribution application and the reuse of the configuration when the same instance occurs. The system of reservation interlocking is simulated in an IEC 61499 execution environment FBDK conducted to prove the feasibility and flexibility of using function blocks method.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"491 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121532668","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 : 2012-05-21DOI: 10.1109/ISGT-ASIA.2012.6303173
T. Han, B. Du, Yu Gao, Yansong Xia
Partial discharge (PD) measurement is a promising method for condition assessment of insulation systems in smart grid. Conventional PD measuring systems have some difficulties in the measurements especially under on-line and noisy conditions. There is a growing tendency to use new measuring systems for the detection of PD pulses in 10 kV switchgears. In this paper, a new PD detection method based on Transient Earth Voltage (TEV) has been proposed. An efficient sensor was employed to detect PD pulses. The TEV sensor was implemented on a 10 kV switchgear and the TEV signals of three kinds of discharge were recorded and analyzed. The distribution characteristics of the signals were studied to achieve the pattern recognition. Finally the result of pattern recognition based on TEV signals was discussed. The result shows that the three kinds of discharge can be recognized through the spectrograms.
{"title":"Partial discharge pattern recognition based on Transient Earth Voltage for 10 kV switchgear in smart grid","authors":"T. Han, B. Du, Yu Gao, Yansong Xia","doi":"10.1109/ISGT-ASIA.2012.6303173","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303173","url":null,"abstract":"Partial discharge (PD) measurement is a promising method for condition assessment of insulation systems in smart grid. Conventional PD measuring systems have some difficulties in the measurements especially under on-line and noisy conditions. There is a growing tendency to use new measuring systems for the detection of PD pulses in 10 kV switchgears. In this paper, a new PD detection method based on Transient Earth Voltage (TEV) has been proposed. An efficient sensor was employed to detect PD pulses. The TEV sensor was implemented on a 10 kV switchgear and the TEV signals of three kinds of discharge were recorded and analyzed. The distribution characteristics of the signals were studied to achieve the pattern recognition. Finally the result of pattern recognition based on TEV signals was discussed. The result shows that the three kinds of discharge can be recognized through the spectrograms.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115854834","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 : 2012-05-21DOI: 10.1109/ISGT-ASIA.2012.6303336
Ming Niu, Zhao Xu
This paper proposes an application of Differential Evolution algorithm to power system reactive power planning with wind farms integration. The SVC device is used to minimize the real power losses and to improve the voltage profile during various operation scenarios disturbed by wind power variations. The model is also formulated as a constrained optimization problem, where the constraint is to let the voltage of connection point of the wind farms into the grid close to 1 p.u., which is formulated as a penalty function into the objective function. The reactive power optimization is tested in a modified version of the IEEE 30 bus test system for 6 scenarios of different wind speed levels based on Monte-Carlo simulations with satisfactory results.
{"title":"Reactive power planning for transmission grids with wind power penetration","authors":"Ming Niu, Zhao Xu","doi":"10.1109/ISGT-ASIA.2012.6303336","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303336","url":null,"abstract":"This paper proposes an application of Differential Evolution algorithm to power system reactive power planning with wind farms integration. The SVC device is used to minimize the real power losses and to improve the voltage profile during various operation scenarios disturbed by wind power variations. The model is also formulated as a constrained optimization problem, where the constraint is to let the voltage of connection point of the wind farms into the grid close to 1 p.u., which is formulated as a penalty function into the objective function. The reactive power optimization is tested in a modified version of the IEEE 30 bus test system for 6 scenarios of different wind speed levels based on Monte-Carlo simulations with satisfactory results.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123791768","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 : 2012-05-21DOI: 10.1109/ISGT-ASIA.2012.6303240
Luo Sha, Zeng Xiangjun, Peng Feng, L. Hui
Along with the development and construction of smart grid and smart substation, the research on the electronic current transformer develops deeply. In order to achieve the measuring requirements of high accuracy and broad range, a new design of combined electronic transformer is proposed in this paper based on the analysis of current technology; the waveform smooth algorithm is adopted to solve the skipping problem which may occur at the time of data switch. At the end, MATLAB Simulations verify the feasibility of the algorithm. This paper will be helpful in the design of combined electronic current transformer.
{"title":"Technology of range selection on combined electronic current transformer","authors":"Luo Sha, Zeng Xiangjun, Peng Feng, L. Hui","doi":"10.1109/ISGT-ASIA.2012.6303240","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303240","url":null,"abstract":"Along with the development and construction of smart grid and smart substation, the research on the electronic current transformer develops deeply. In order to achieve the measuring requirements of high accuracy and broad range, a new design of combined electronic transformer is proposed in this paper based on the analysis of current technology; the waveform smooth algorithm is adopted to solve the skipping problem which may occur at the time of data switch. At the end, MATLAB Simulations verify the feasibility of the algorithm. This paper will be helpful in the design of combined electronic current transformer.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125174735","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 : 2012-05-21DOI: 10.1109/ISGT-ASIA.2012.6303292
H. Bitaraf, M. Sheikholeslamzadeh, A. Ranjbar, B. Mozafari
Islanding detection methods are divided into three main groups as remote, active and passive. Although passive schemes have larger Non Detection Zones (NDZ) relative to other schemes, they are more used in utilities due to their low costs and less PQ problems than other schemes. Passive Schemes are based on the measurements of passive system parameters. These parameters are measured at the point of common coupling (PCC). A new approach in passive techniques is the use of data-mining to classify the system parameters. In this paper, massive indices are collected by simulation of a practical distribution system in PSCAD/EMTP environment. These indices include voltage, frequency, current, active power and etc. The classifying process of these indices is done by the Adaptive Neuro-Fuzzy Inference System (ANFIS) in MATLAB and the resultant logics and boundaries are implemented by the fuzzy logic using MATLAB software. The results show the effectiveness of ANFIS in reducing the NDZ of passive islanding detection schemes. In addition, this technique can be easily implemented with minor changes to distribution systems with different penetration levels and types of Distributed Generation (DG) as well as different distribution system topology.
{"title":"Neuro-fuzzy islanding detection in distributed generation","authors":"H. Bitaraf, M. Sheikholeslamzadeh, A. Ranjbar, B. Mozafari","doi":"10.1109/ISGT-ASIA.2012.6303292","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303292","url":null,"abstract":"Islanding detection methods are divided into three main groups as remote, active and passive. Although passive schemes have larger Non Detection Zones (NDZ) relative to other schemes, they are more used in utilities due to their low costs and less PQ problems than other schemes. Passive Schemes are based on the measurements of passive system parameters. These parameters are measured at the point of common coupling (PCC). A new approach in passive techniques is the use of data-mining to classify the system parameters. In this paper, massive indices are collected by simulation of a practical distribution system in PSCAD/EMTP environment. These indices include voltage, frequency, current, active power and etc. The classifying process of these indices is done by the Adaptive Neuro-Fuzzy Inference System (ANFIS) in MATLAB and the resultant logics and boundaries are implemented by the fuzzy logic using MATLAB software. The results show the effectiveness of ANFIS in reducing the NDZ of passive islanding detection schemes. In addition, this technique can be easily implemented with minor changes to distribution systems with different penetration levels and types of Distributed Generation (DG) as well as different distribution system topology.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131529472","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 : 2012-05-21DOI: 10.1109/ISGT-ASIA.2012.6303144
Wang Qinghao, Wang Tianshi, Sheng Jidong, Zhang Xinwei, Shi Guodong
Power quality disturbances detection and classification methods based EMD are proposed in this paper. The time of disturbance occurrence and duration, and the frequency and amplitude of disturbance can be detected accurately by this method. Such as voltage sags, voltage swells, voltage interruptions and other disturbances raised the signal amplitude and frequency changes can be estimated. The results of MATLAB simulation show the proposed method is simple and effective.
{"title":"The power quality disturbance detection and classification method based on EMD","authors":"Wang Qinghao, Wang Tianshi, Sheng Jidong, Zhang Xinwei, Shi Guodong","doi":"10.1109/ISGT-ASIA.2012.6303144","DOIUrl":"https://doi.org/10.1109/ISGT-ASIA.2012.6303144","url":null,"abstract":"Power quality disturbances detection and classification methods based EMD are proposed in this paper. The time of disturbance occurrence and duration, and the frequency and amplitude of disturbance can be detected accurately by this method. Such as voltage sags, voltage swells, voltage interruptions and other disturbances raised the signal amplitude and frequency changes can be estimated. The results of MATLAB simulation show the proposed method is simple and effective.","PeriodicalId":330758,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127570620","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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