Pub Date : 2019-12-01DOI: 10.1109/IPAPS49326.2019.9069381
Mohammad Mehrabikooshki, S. Mirhosseini, S. Jamali
This paper proposes a single-end protection scheme based on high frequency components of DC line current for protection of transmission lines in LCC-HVDC system. The protection scheme deploys the boundary characteristics of transmission line which eliminates high frequency components of external faults due to presence of filter-reactor unit at the line terminal. The scheme consists of two criteria including fault detection criterion and protection criterion to distinguish between internal and external faults. The performance of the protection scheme is evaluated by performing numerous simulation studies considering different fault locations, fault resistance, length of data window, sampling frequency and change in the transmission line power as well. The simulation results confirm that the proposed protection scheme is capable of discriminating between different types of high resistance internal faults and external faults at DC and AC sides using only rectifier side measurements. Moreover, it is simple, fast and reliable, and does not need communication between transmission line ends.
{"title":"Single-End Protection Scheme for LCC- HVDC Transmission Lines Based on High Frequency Components of Transmission Line Current","authors":"Mohammad Mehrabikooshki, S. Mirhosseini, S. Jamali","doi":"10.1109/IPAPS49326.2019.9069381","DOIUrl":"https://doi.org/10.1109/IPAPS49326.2019.9069381","url":null,"abstract":"This paper proposes a single-end protection scheme based on high frequency components of DC line current for protection of transmission lines in LCC-HVDC system. The protection scheme deploys the boundary characteristics of transmission line which eliminates high frequency components of external faults due to presence of filter-reactor unit at the line terminal. The scheme consists of two criteria including fault detection criterion and protection criterion to distinguish between internal and external faults. The performance of the protection scheme is evaluated by performing numerous simulation studies considering different fault locations, fault resistance, length of data window, sampling frequency and change in the transmission line power as well. The simulation results confirm that the proposed protection scheme is capable of discriminating between different types of high resistance internal faults and external faults at DC and AC sides using only rectifier side measurements. Moreover, it is simple, fast and reliable, and does not need communication between transmission line ends.","PeriodicalId":230294,"journal":{"name":"2020 14th International Conference on Protection and Automation of Power Systems (IPAPS)","volume":"131 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120976025","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 : 2019-12-01DOI: 10.1109/IPAPS49326.2019.9069383
B. Keyvani, Hassan Bakhtiari, H. Nafisi
Prospective short circuit level for MV switchgears of an industrial network is supposed to increase in time, due to inevitable expansion of utility network, probable installation of local generators and increasing the production capacities resulting in more motor contribution. If this short circuit current exceeds the level for which the switchgear was designed, the plant owner shall take some measures to prevent from possible damage. To solve the problem without replacing existing equipment, current limiting protectors have been utilized. These devices could reduce prospective short circuit current coming from upstream and could be an economical solution to this problem. Meanwhile, as these devices are triggered by instantaneous current, events especially relating to sudden increase in current may cause them to operate. This ‘False Tripping’ is troublesome since these devices usually install on main incoming feeders of the network. This paper investigates the issue for a project aiming the reduction of short-circuit level from motor dynamics perspective including contribution to upstream fault and response to voltage dip using PSCAD/EMTDC software.
{"title":"Investigation on Impact of Motor Dynamics on Operation of Current Limiting Protectors","authors":"B. Keyvani, Hassan Bakhtiari, H. Nafisi","doi":"10.1109/IPAPS49326.2019.9069383","DOIUrl":"https://doi.org/10.1109/IPAPS49326.2019.9069383","url":null,"abstract":"Prospective short circuit level for MV switchgears of an industrial network is supposed to increase in time, due to inevitable expansion of utility network, probable installation of local generators and increasing the production capacities resulting in more motor contribution. If this short circuit current exceeds the level for which the switchgear was designed, the plant owner shall take some measures to prevent from possible damage. To solve the problem without replacing existing equipment, current limiting protectors have been utilized. These devices could reduce prospective short circuit current coming from upstream and could be an economical solution to this problem. Meanwhile, as these devices are triggered by instantaneous current, events especially relating to sudden increase in current may cause them to operate. This ‘False Tripping’ is troublesome since these devices usually install on main incoming feeders of the network. This paper investigates the issue for a project aiming the reduction of short-circuit level from motor dynamics perspective including contribution to upstream fault and response to voltage dip using PSCAD/EMTDC software.","PeriodicalId":230294,"journal":{"name":"2020 14th International Conference on Protection and Automation of Power Systems (IPAPS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131772916","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 : 2019-12-01DOI: 10.1109/IPAPS49326.2019.9069384
Mohammad Zaman Jelvian, Mohammad Jahani, G. Gharehpetian
In Asaluyeh BOO power plant, during energizing the Pars substation 500MVA transformer or each unit of main transformer, it is possible to have a load rejection (tripping) for one of in-service units. This sudden outage is due to the grid voltage decrease during transient mode caused by power transformer inrush current. Regarding to the grid low short-circuit level in this region, and the reactive power fluctuations caused by grid and power plants maneuvers, one of the units is working in the underexcitation area. Eventually, the underexcitation protection trips the generator and Gas Circuit Breaker (GCB) and leads to load rejection. In this paper, this problem is investigated using fault analysis, factors affecting the faults occurrences and dynamic tests performed at different load levels. MATLAB and DIgSILENT software are used in order to simulate the system. Based on simulation results, correct settings for underexcitation protection (Ansi 40G) and Underexcitation Limiter (UEL) are respectively proposed, to prevent units unintended outage and their negative effects on grid transients.
{"title":"Coordination of Generator Underexcitation Protection with Underexcitation Limiter to Prevent Generator Tripping During Power Transformer Energization: Asaluyeh Power Plant Case","authors":"Mohammad Zaman Jelvian, Mohammad Jahani, G. Gharehpetian","doi":"10.1109/IPAPS49326.2019.9069384","DOIUrl":"https://doi.org/10.1109/IPAPS49326.2019.9069384","url":null,"abstract":"In Asaluyeh BOO power plant, during energizing the Pars substation 500MVA transformer or each unit of main transformer, it is possible to have a load rejection (tripping) for one of in-service units. This sudden outage is due to the grid voltage decrease during transient mode caused by power transformer inrush current. Regarding to the grid low short-circuit level in this region, and the reactive power fluctuations caused by grid and power plants maneuvers, one of the units is working in the underexcitation area. Eventually, the underexcitation protection trips the generator and Gas Circuit Breaker (GCB) and leads to load rejection. In this paper, this problem is investigated using fault analysis, factors affecting the faults occurrences and dynamic tests performed at different load levels. MATLAB and DIgSILENT software are used in order to simulate the system. Based on simulation results, correct settings for underexcitation protection (Ansi 40G) and Underexcitation Limiter (UEL) are respectively proposed, to prevent units unintended outage and their negative effects on grid transients.","PeriodicalId":230294,"journal":{"name":"2020 14th International Conference on Protection and Automation of Power Systems (IPAPS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116118233","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 : 2019-12-01DOI: 10.1109/IPAPS49326.2019.9069391
Jalal Moradi, Hossein Shahinzadeh, H. Nafisi, M. Marzband, G. Gharehpetian
Big data analytics is a virtually new term in power system terminology. This concept delves into the way a massive volume of data is acquired, processed, analyzed to extract insight from available data. In particular, big data analytics alludes to applications of artificial intelligence, machine learning techniques, data mining techniques, time-series forecasting methods. Decision-makers in power systems have been long plagued by incapability and weakness of classical methods in dealing with large-scale real practical cases due to the existence of thousands or millions of variables, being time-consuming, the requirement of a high computation burden, divergence of results, unjustifiable errors, and poor accuracy of the model. Big data analytics is an ongoing topic, which pinpoints how to extract insights from these large data sets. The extant article has enumerated the applications of big data analytics in future power systems through several layers from grid-scale to local-scale. Big data analytics has many applications in the areas of smart grid implementation, electricity markets, execution of collaborative operation schemes, enhancement of microgrid operation autonomy, management of electric vehicle operations in smart grids, active distribution network control, district hub system management, multi-agent energy systems, electricity theft detection, stability and security assessment by PMUs, and better exploitation of renewable energy sources. The employment of big data analytics entails some prerequisites, such as the proliferation of IoT-enabled devices, easily-accessible cloud space, blockchain, etc. This paper has comprehensively conducted an extensive review of the applications of big data analytics along with the prevailing challenges and solutions.
{"title":"Attributes of Big Data Analytics for Data-Driven Decision Making in Cyber-Physical Power Systems","authors":"Jalal Moradi, Hossein Shahinzadeh, H. Nafisi, M. Marzband, G. Gharehpetian","doi":"10.1109/IPAPS49326.2019.9069391","DOIUrl":"https://doi.org/10.1109/IPAPS49326.2019.9069391","url":null,"abstract":"Big data analytics is a virtually new term in power system terminology. This concept delves into the way a massive volume of data is acquired, processed, analyzed to extract insight from available data. In particular, big data analytics alludes to applications of artificial intelligence, machine learning techniques, data mining techniques, time-series forecasting methods. Decision-makers in power systems have been long plagued by incapability and weakness of classical methods in dealing with large-scale real practical cases due to the existence of thousands or millions of variables, being time-consuming, the requirement of a high computation burden, divergence of results, unjustifiable errors, and poor accuracy of the model. Big data analytics is an ongoing topic, which pinpoints how to extract insights from these large data sets. The extant article has enumerated the applications of big data analytics in future power systems through several layers from grid-scale to local-scale. Big data analytics has many applications in the areas of smart grid implementation, electricity markets, execution of collaborative operation schemes, enhancement of microgrid operation autonomy, management of electric vehicle operations in smart grids, active distribution network control, district hub system management, multi-agent energy systems, electricity theft detection, stability and security assessment by PMUs, and better exploitation of renewable energy sources. The employment of big data analytics entails some prerequisites, such as the proliferation of IoT-enabled devices, easily-accessible cloud space, blockchain, etc. This paper has comprehensively conducted an extensive review of the applications of big data analytics along with the prevailing challenges and solutions.","PeriodicalId":230294,"journal":{"name":"2020 14th International Conference on Protection and Automation of Power Systems (IPAPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130718466","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 : 2019-12-01DOI: 10.1109/IPAPS49326.2019.9069385
S. Aref, Alireza Sedighi Anaraki, Davoud Abootorabi Zarchi
catastrophic circumstances and equipment failures in electrical networks are mostly caused by emerging non-linear phenomena. Resonance and Ferroresonance are those phenomena, which have been investigated since, many years ago. Montazer Qaem 63 kV substation is susceptible to ferroresonance due to existing underground cable network and capacitor bank. Ferroresonance conditions are generally initialized in effect of short circuit, breaker phase failure, transformer energizing, load rejection, accidental or scheduled line disconnection, and over voltage in the network. In this paper by means of PSCAD/EMTDC simulation software, probability of occurrence of ferroresonance is examined in Montazer Qaem substation. Several ferroresonant configurations are considered in the network and results are analyzed. Ferroresonance states are classified in to adequate modes by Ferroresonance detection tool. Finally, some solutions to suppress ferroresonance applicable to substation are recommended.
{"title":"Probability Evaluation of Occurrence of Ferroresonance in Montazer Qaem 63kV Substation","authors":"S. Aref, Alireza Sedighi Anaraki, Davoud Abootorabi Zarchi","doi":"10.1109/IPAPS49326.2019.9069385","DOIUrl":"https://doi.org/10.1109/IPAPS49326.2019.9069385","url":null,"abstract":"catastrophic circumstances and equipment failures in electrical networks are mostly caused by emerging non-linear phenomena. Resonance and Ferroresonance are those phenomena, which have been investigated since, many years ago. Montazer Qaem 63 kV substation is susceptible to ferroresonance due to existing underground cable network and capacitor bank. Ferroresonance conditions are generally initialized in effect of short circuit, breaker phase failure, transformer energizing, load rejection, accidental or scheduled line disconnection, and over voltage in the network. In this paper by means of PSCAD/EMTDC simulation software, probability of occurrence of ferroresonance is examined in Montazer Qaem substation. Several ferroresonant configurations are considered in the network and results are analyzed. Ferroresonance states are classified in to adequate modes by Ferroresonance detection tool. Finally, some solutions to suppress ferroresonance applicable to substation are recommended.","PeriodicalId":230294,"journal":{"name":"2020 14th International Conference on Protection and Automation of Power Systems (IPAPS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131340672","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 : 2019-12-01DOI: 10.1109/IPAPS49326.2019.9069390
Nima Farzin, M. Vakilian, E. Hajipour
Turn-to-turn fault (TTF) inception on a transformer can be very destructive and damaging. In order to check the performance of TTF protection algorithms, it is necessary to model the transformer in the presence of TTFs. Under minor TTF inception, the rise in the terminal currents of the transformer is just in the order of its no-load current. Therefore, in this study, a suitable transformer model should be employed to address the role of core and windings under the occurrence of minor TTF, accurately. This paper presents a new equivalent reluctance circuit for three-phase transformers in the presence of TTFs. This equivalent model employs the parameters determined by the finite element method. This model contains the admittance matrix and it is well-known as the terminal-duality model. For verification of the model, a real three-phase custom-built transformer is employed and modeled in this paper. The results obtained from the developed model are validated against the experimental results of TTF tests carried out on this transformer.
{"title":"Transformer Terminal-Duality Model for Windings Tum-to-Tum Faults Simulation","authors":"Nima Farzin, M. Vakilian, E. Hajipour","doi":"10.1109/IPAPS49326.2019.9069390","DOIUrl":"https://doi.org/10.1109/IPAPS49326.2019.9069390","url":null,"abstract":"Turn-to-turn fault (TTF) inception on a transformer can be very destructive and damaging. In order to check the performance of TTF protection algorithms, it is necessary to model the transformer in the presence of TTFs. Under minor TTF inception, the rise in the terminal currents of the transformer is just in the order of its no-load current. Therefore, in this study, a suitable transformer model should be employed to address the role of core and windings under the occurrence of minor TTF, accurately. This paper presents a new equivalent reluctance circuit for three-phase transformers in the presence of TTFs. This equivalent model employs the parameters determined by the finite element method. This model contains the admittance matrix and it is well-known as the terminal-duality model. For verification of the model, a real three-phase custom-built transformer is employed and modeled in this paper. The results obtained from the developed model are validated against the experimental results of TTF tests carried out on this transformer.","PeriodicalId":230294,"journal":{"name":"2020 14th International Conference on Protection and Automation of Power Systems (IPAPS)","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121991033","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 : 2019-12-01DOI: 10.1109/IPAPS49326.2019.9069386
Iraj Pourkeivani, M. Abedi, S. Kouhsari, Reza Ghaniabadi
Online assessment of power system voltage stability is essential to ensure its secure operation. Various indices have been developed to determine the proximity to voltage instability. The calculation of some of these indices has taken a high computational time, and some of them don't give appropriate results. In this study, a normalized voltage stability index (SI) for the voltage stability assessment is presented, which is mathematically developed on a two-bus system and is also studied on the IEEE 39-bus test system. With this index, the candidate buses for the voltage instability event are identified, and the voltage instability point of each of them is predicted using the curve fitting tool. Also, The state estimation tool is used to evaluate the proposed index and predict the instability point. In addition to the simplicity of calculation and reliability, the preference of the proposed method is that it is fast enough that it can be used for online monitoring of voltage stability.
{"title":"A Novel Index to Predict the Voltage Instability Point in Power Systems Using PMU-based State Estimation","authors":"Iraj Pourkeivani, M. Abedi, S. Kouhsari, Reza Ghaniabadi","doi":"10.1109/IPAPS49326.2019.9069386","DOIUrl":"https://doi.org/10.1109/IPAPS49326.2019.9069386","url":null,"abstract":"Online assessment of power system voltage stability is essential to ensure its secure operation. Various indices have been developed to determine the proximity to voltage instability. The calculation of some of these indices has taken a high computational time, and some of them don't give appropriate results. In this study, a normalized voltage stability index (SI) for the voltage stability assessment is presented, which is mathematically developed on a two-bus system and is also studied on the IEEE 39-bus test system. With this index, the candidate buses for the voltage instability event are identified, and the voltage instability point of each of them is predicted using the curve fitting tool. Also, The state estimation tool is used to evaluate the proposed index and predict the instability point. In addition to the simplicity of calculation and reliability, the preference of the proposed method is that it is fast enough that it can be used for online monitoring of voltage stability.","PeriodicalId":230294,"journal":{"name":"2020 14th International Conference on Protection and Automation of Power Systems (IPAPS)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130161687","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 : 2019-12-01DOI: 10.1109/IPAPS49326.2019.9069389
Mohammad Zand, Morteza Azimi Nasab, Omid Neghabi, M. Khalili, A. Goli
Presently, with the increasing competition due to the privatization of the electricity industry and the desire to provide better services to customers with critical loads. It has led to the development of speed and reliability of fault locating methods for transmission and distribution systems. It can be difficult to locate the fault. There are various methods for locating in series compensated lines with series equipment. This paper presents a novel fault locating algorithm on series compensated lines with the presence of Thyristor Controlled Capacitor Compensator (TCSC). The proposed algorithm was presented and the simulation was modeled in MATLAB software. The results show that the proposed algorithm increases the accuracy and at the same time speeds up the detection of the fault location in the series compensated transmission lines in order to prevent the malfunction of the relay operation.
{"title":"Fault locating transmission lines with thyristor-controlled series capacitors By fuzzy logic method","authors":"Mohammad Zand, Morteza Azimi Nasab, Omid Neghabi, M. Khalili, A. Goli","doi":"10.1109/IPAPS49326.2019.9069389","DOIUrl":"https://doi.org/10.1109/IPAPS49326.2019.9069389","url":null,"abstract":"Presently, with the increasing competition due to the privatization of the electricity industry and the desire to provide better services to customers with critical loads. It has led to the development of speed and reliability of fault locating methods for transmission and distribution systems. It can be difficult to locate the fault. There are various methods for locating in series compensated lines with series equipment. This paper presents a novel fault locating algorithm on series compensated lines with the presence of Thyristor Controlled Capacitor Compensator (TCSC). The proposed algorithm was presented and the simulation was modeled in MATLAB software. The results show that the proposed algorithm increases the accuracy and at the same time speeds up the detection of the fault location in the series compensated transmission lines in order to prevent the malfunction of the relay operation.","PeriodicalId":230294,"journal":{"name":"2020 14th International Conference on Protection and Automation of Power Systems (IPAPS)","volume":"224 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114390330","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 : 2019-12-01DOI: 10.1109/IPAPS49326.2019.9069388
A. Samadi, R. M. Chabanloo
Digital Overcurrent Relays (OCRs) can store multiple Setting Groups (SGs) to be capable of protecting different network states (NSTs) by changing the activated SG of OCRs when it's needed. Therefore, in a network with a high number of possible topologies and a high penetration factor of Distributed Generations (DGs), the number of required setting changes rises. There is always the risk of applying wrong settings to the OCRs in case of NST changes. The risk of applying wrong settings to the relays rises by the increment of setting changes. In this paper, NSTs are grouped and protected by one SG of OCRs in a way that the minimum number of setting changes are used considering all possible configuration changes and DGs connection/disconnection. Doing so reduces the possibility of activating the wrong SGs in OCRs by decreasing the number of setting changes. In this paper, a multi-objective optimization algorithm is proposed to find the optimum operation point considering the number of setting changes, the number of SGs and total protection time. It has shown in the results that the number of setting changes has been reduced a lot by using this paper's method.
{"title":"Adaptive coordination of overcurrent relays in active distribution networks utilizing a multi-objective optimization approach","authors":"A. Samadi, R. M. Chabanloo","doi":"10.1109/IPAPS49326.2019.9069388","DOIUrl":"https://doi.org/10.1109/IPAPS49326.2019.9069388","url":null,"abstract":"Digital Overcurrent Relays (OCRs) can store multiple Setting Groups (SGs) to be capable of protecting different network states (NSTs) by changing the activated SG of OCRs when it's needed. Therefore, in a network with a high number of possible topologies and a high penetration factor of Distributed Generations (DGs), the number of required setting changes rises. There is always the risk of applying wrong settings to the OCRs in case of NST changes. The risk of applying wrong settings to the relays rises by the increment of setting changes. In this paper, NSTs are grouped and protected by one SG of OCRs in a way that the minimum number of setting changes are used considering all possible configuration changes and DGs connection/disconnection. Doing so reduces the possibility of activating the wrong SGs in OCRs by decreasing the number of setting changes. In this paper, a multi-objective optimization algorithm is proposed to find the optimum operation point considering the number of setting changes, the number of SGs and total protection time. It has shown in the results that the number of setting changes has been reduced a lot by using this paper's method.","PeriodicalId":230294,"journal":{"name":"2020 14th International Conference on Protection and Automation of Power Systems (IPAPS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114935785","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 : 2019-12-01DOI: 10.1109/IPAPS49326.2019.9069380
Mahmoud Lashgari, S. Shahrtash
This paper presents a method for ultra-fast detection and location of busbar faults. The proposed algorithm is based on the output values of online Improved Morphological Gradient (IMG) that is applied to the superimposed component of current signals. Algorithm only performs fault detection and location using current signals of current transformers (CTs) that are placed in busbar protection zones and can be used in any type of busbar structure. To evaluate the performance of the proposed algorithm, a 400 kV substation model has been simulated by EMTP/ATP-Draw software. The simulation results indicate that the proposed algorithm has high security against external faults, and is able to find the location of the internal busbar fault.
{"title":"Ultra-Fast Detection and Location of Busbar Faults Employing IMG","authors":"Mahmoud Lashgari, S. Shahrtash","doi":"10.1109/IPAPS49326.2019.9069380","DOIUrl":"https://doi.org/10.1109/IPAPS49326.2019.9069380","url":null,"abstract":"This paper presents a method for ultra-fast detection and location of busbar faults. The proposed algorithm is based on the output values of online Improved Morphological Gradient (IMG) that is applied to the superimposed component of current signals. Algorithm only performs fault detection and location using current signals of current transformers (CTs) that are placed in busbar protection zones and can be used in any type of busbar structure. To evaluate the performance of the proposed algorithm, a 400 kV substation model has been simulated by EMTP/ATP-Draw software. The simulation results indicate that the proposed algorithm has high security against external faults, and is able to find the location of the internal busbar fault.","PeriodicalId":230294,"journal":{"name":"2020 14th International Conference on Protection and Automation of Power Systems (IPAPS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121377240","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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