Pub Date : 2022-12-04DOI: 10.1109/iSPEC54162.2022.10032991
Nariman Mahdavi
This paper quantifies the hourly solar photovoltaics (PV) rebound effect by examining the changes in consumption after the installation of a rooftop PV system. The hourly PV rebound ratio of a single customer has been estimated by leveraging the recently developed method that estimates behind-the-meter (BTM) gross solar generation from the net demand and weather data. Pre-PV consumption data has been also adjusted to temperature and occupancy after the PV installation for a fair comparison. We then proposed a simple method to find the aggregated hourly PV rebound ratio of national electricity market (NEM) regions in Australia. The results indicate that both morning and afternoon peaks are present in PV rebound of all regions. The early morning peak, however, has been shifted to mid-morning when moving from summer to winter. On average, regional demand has been increased by 20% in the year following the rooftop PV installation.
{"title":"Solar PV Rebound Effect on Regional Demand","authors":"Nariman Mahdavi","doi":"10.1109/iSPEC54162.2022.10032991","DOIUrl":"https://doi.org/10.1109/iSPEC54162.2022.10032991","url":null,"abstract":"This paper quantifies the hourly solar photovoltaics (PV) rebound effect by examining the changes in consumption after the installation of a rooftop PV system. The hourly PV rebound ratio of a single customer has been estimated by leveraging the recently developed method that estimates behind-the-meter (BTM) gross solar generation from the net demand and weather data. Pre-PV consumption data has been also adjusted to temperature and occupancy after the PV installation for a fair comparison. We then proposed a simple method to find the aggregated hourly PV rebound ratio of national electricity market (NEM) regions in Australia. The results indicate that both morning and afternoon peaks are present in PV rebound of all regions. The early morning peak, however, has been shifted to mid-morning when moving from summer to winter. On average, regional demand has been increased by 20% in the year following the rooftop PV installation.","PeriodicalId":129707,"journal":{"name":"2022 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116777491","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 : 2022-12-04DOI: 10.1109/iSPEC54162.2022.10033051
Ziyi Qin, Yang Li, Jinrui Tang, Shaofeng Zhang, C. Xie, Binyu Xiong
Pump failures are severe accidents for vanadium redox flow batteries (VRFBs) since they will lead to permanent stack damage. Fault detection of VRFBs can help to detect faults immediately and minimize damage. This study reports a pump fault detection method without using flow rate sensors. A novel method based on the support vector machine (SVM) is proposed. First, the characteristic parameter is extracted from the voltage curve. Second, the magnitude of this characteristic parameter is affected by the state of charge (SOC) of the battery, so SOC is also selected as one of the fault detection variables. Finally, the parameters of the SVM are optimized, and the fault prediction results are obtained by SVM training. The obtained results show that this method has high accuracy in detecting the pump fault of the battery, and the classification accuracies were 100%, 99.1935%, and 98.3871% in the case of bilateral pump failure, positive pump failure, and negative pump failure, respectively.
{"title":"Pump Fault Detection Method for Vanadium Redox Flow Batteries Without Flow Rate Sensors","authors":"Ziyi Qin, Yang Li, Jinrui Tang, Shaofeng Zhang, C. Xie, Binyu Xiong","doi":"10.1109/iSPEC54162.2022.10033051","DOIUrl":"https://doi.org/10.1109/iSPEC54162.2022.10033051","url":null,"abstract":"Pump failures are severe accidents for vanadium redox flow batteries (VRFBs) since they will lead to permanent stack damage. Fault detection of VRFBs can help to detect faults immediately and minimize damage. This study reports a pump fault detection method without using flow rate sensors. A novel method based on the support vector machine (SVM) is proposed. First, the characteristic parameter is extracted from the voltage curve. Second, the magnitude of this characteristic parameter is affected by the state of charge (SOC) of the battery, so SOC is also selected as one of the fault detection variables. Finally, the parameters of the SVM are optimized, and the fault prediction results are obtained by SVM training. The obtained results show that this method has high accuracy in detecting the pump fault of the battery, and the classification accuracies were 100%, 99.1935%, and 98.3871% in the case of bilateral pump failure, positive pump failure, and negative pump failure, respectively.","PeriodicalId":129707,"journal":{"name":"2022 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127463327","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 : 2022-12-04DOI: 10.1109/iSPEC54162.2022.10032989
Yunqi Zhang, Congbo Wang, Yue Yu, Guosheng Yang, Hong Cao
In order to satisfy the ultra-fast, high reliability and high sensitivity requirements of the voltage source converter based high voltage DC (VSC-HVDC) systems, a pilot protection principle based on similarity of time-frequency matrix of initial current traveling wave (ICTW) is proposed in this paper. First of all, the fault characteristics of the double-ended ICTWs in the VSC-HVDC grids are studied. It is concluded that within a specific time window, the frequency-domain similarity of the double-ended ICTWs under internal faults is much higher than external faults. On this basis, S transform is utilized to analyze the time-frequency characteristics of the double-ended ICTWs, and the time-frequency matrices are obtained. Then singular value decomposition (SVD) is performed on the matrices. Afterwards the similarity calculation formula of the double-ended ICTWs is constructed based on the feature matrices, and the DC line fault can be discriminated accurately by utilizing the value of similarity. Finally, numerous test studies performed in PSCAD/EMTDC validate the superiority of the proposed protection principle.
{"title":"A Pilot VSC-HVDC Line Protection Principle Based on Similarity of Time-Frequency Matrix of Initial Current Traveling Wave","authors":"Yunqi Zhang, Congbo Wang, Yue Yu, Guosheng Yang, Hong Cao","doi":"10.1109/iSPEC54162.2022.10032989","DOIUrl":"https://doi.org/10.1109/iSPEC54162.2022.10032989","url":null,"abstract":"In order to satisfy the ultra-fast, high reliability and high sensitivity requirements of the voltage source converter based high voltage DC (VSC-HVDC) systems, a pilot protection principle based on similarity of time-frequency matrix of initial current traveling wave (ICTW) is proposed in this paper. First of all, the fault characteristics of the double-ended ICTWs in the VSC-HVDC grids are studied. It is concluded that within a specific time window, the frequency-domain similarity of the double-ended ICTWs under internal faults is much higher than external faults. On this basis, S transform is utilized to analyze the time-frequency characteristics of the double-ended ICTWs, and the time-frequency matrices are obtained. Then singular value decomposition (SVD) is performed on the matrices. Afterwards the similarity calculation formula of the double-ended ICTWs is constructed based on the feature matrices, and the DC line fault can be discriminated accurately by utilizing the value of similarity. Finally, numerous test studies performed in PSCAD/EMTDC validate the superiority of the proposed protection principle.","PeriodicalId":129707,"journal":{"name":"2022 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128365109","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 : 2022-12-04DOI: 10.1109/iSPEC54162.2022.10033065
B. B. Cardoso, Paula Zenni Lodetti, Maileen Schwarz Simão, M. A. Martins, Luis Gustavo O. B. Ulhoa, Luciano Benvenuti Roncalio, L. D. P. A. Pinheiro, Orlando Da Silva Santos
Blockchain technology brings numerous varieties of applications, and within them, the electric energy area stands out. To apply this technology in the sector, it is necessary to understand its characteristics and the needs of users. This paper presents the main characteristics of blockchain technology, a survey carried out with users of shared generation, and, using the data collected together with a market research, a business model was developed with short, medium and long expectations.
{"title":"Business Model for Shared Energy Generation with Peer-To-Peer Trading via Blockchain","authors":"B. B. Cardoso, Paula Zenni Lodetti, Maileen Schwarz Simão, M. A. Martins, Luis Gustavo O. B. Ulhoa, Luciano Benvenuti Roncalio, L. D. P. A. Pinheiro, Orlando Da Silva Santos","doi":"10.1109/iSPEC54162.2022.10033065","DOIUrl":"https://doi.org/10.1109/iSPEC54162.2022.10033065","url":null,"abstract":"Blockchain technology brings numerous varieties of applications, and within them, the electric energy area stands out. To apply this technology in the sector, it is necessary to understand its characteristics and the needs of users. This paper presents the main characteristics of blockchain technology, a survey carried out with users of shared generation, and, using the data collected together with a market research, a business model was developed with short, medium and long expectations.","PeriodicalId":129707,"journal":{"name":"2022 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133455583","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 : 2022-12-04DOI: 10.1109/iSPEC54162.2022.10032997
Nie Xin, Anjar Praditya Wicaksono
Green chemistry is the theory of making full use of raw materials and energy to reduce the emission of harmful substances. The chemical water treatment process in thermal power plants involves the utilization of raw materials and energy such as chemicals and steam, as well as the emission of harmful substances such as waste water and waste gas. In order to explore feasible technical approaches for the green development of chemical water treatment processes, to follow the green chemistry theory of efficient use and material recycling, and take the chemical water treatment system of thermal power plants as the research object, to introduce ion-exchange membrane technology, to efficiently use of the originally-drained brine water, recycle low-grade heat energy, and form a technical flow chart for the green development of chemical water treatment processes.
{"title":"Green Development Approach Of Chemical Water Treatment Process In Thermal Power Plant","authors":"Nie Xin, Anjar Praditya Wicaksono","doi":"10.1109/iSPEC54162.2022.10032997","DOIUrl":"https://doi.org/10.1109/iSPEC54162.2022.10032997","url":null,"abstract":"Green chemistry is the theory of making full use of raw materials and energy to reduce the emission of harmful substances. The chemical water treatment process in thermal power plants involves the utilization of raw materials and energy such as chemicals and steam, as well as the emission of harmful substances such as waste water and waste gas. In order to explore feasible technical approaches for the green development of chemical water treatment processes, to follow the green chemistry theory of efficient use and material recycling, and take the chemical water treatment system of thermal power plants as the research object, to introduce ion-exchange membrane technology, to efficiently use of the originally-drained brine water, recycle low-grade heat energy, and form a technical flow chart for the green development of chemical water treatment processes.","PeriodicalId":129707,"journal":{"name":"2022 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131287284","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}
In order to ensure the stable operation of relay protection device and identify untrusted data code attacks, this paper proposes a network attacks identification method for relay protection devices communication system based on frequent pattern-growth(FP-Growth) algorithm. Firstly, the transmission model of the communication system of the relay protection device is analyzed. The physical side and the communication side of the relay protection device are monitored through the real-time simulation platform to obtain the original data. Then, the original data are discretely quantized and encoded to generate the abnormal event sequence. Then, FP-Growth algorithm is used to analyze the association of the event sequence to obtain the longest and most frequent sequences. The new attacks categories and fault points are compared by the existing frequent sequence characteristics to determine the type of network attacks or the location of fault points, so as to realize the identification of malicious code attacks, and provide a theoretical basis for the application of trusted technology.
{"title":"Network attacks identification method of relay protection devices communication system based on Fp-Growth algorithm","authors":"Honghui Gao, Zebing Shi, Fangying Wu, Jiang Yu, Quan Xu, Hongzi He, Zhihua Huang","doi":"10.1109/iSPEC54162.2022.10033041","DOIUrl":"https://doi.org/10.1109/iSPEC54162.2022.10033041","url":null,"abstract":"In order to ensure the stable operation of relay protection device and identify untrusted data code attacks, this paper proposes a network attacks identification method for relay protection devices communication system based on frequent pattern-growth(FP-Growth) algorithm. Firstly, the transmission model of the communication system of the relay protection device is analyzed. The physical side and the communication side of the relay protection device are monitored through the real-time simulation platform to obtain the original data. Then, the original data are discretely quantized and encoded to generate the abnormal event sequence. Then, FP-Growth algorithm is used to analyze the association of the event sequence to obtain the longest and most frequent sequences. The new attacks categories and fault points are compared by the existing frequent sequence characteristics to determine the type of network attacks or the location of fault points, so as to realize the identification of malicious code attacks, and provide a theoretical basis for the application of trusted technology.","PeriodicalId":129707,"journal":{"name":"2022 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133844987","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 : 2022-12-04DOI: 10.1109/iSPEC54162.2022.10033040
Qing Xu, Shitao Wang, Jiayi Liu, Huihui Song, Y. Qu
As a typical nonlinear coupled system, microgrid has nonlinear coupling relationships between generations and distributions which cannot be ignored. In this paper, the problem of power balance between distributed generators and loads is transformed into the motion synchronization problem of multiple Kuramoto coupled oscillators. And this paper proposes to model an islanded microgrid by using a second-order Kuramoto model. By exploiting the model, our key sight is to address the transient stability problem and find a trapping region expressed explicitly in the parameters. Finally, the similarity between transient stability of islanded microgrid and frequency synchronization of Kuramoto coupled oscillators is analyzed, and the validity of microgrid Kuramoto models is verified based on the 3-generator 5-node islanded microgrid MATLAB/ Simulink simulation platform.
{"title":"Analysis of Kuramoto models for AC microgrids based on droop control","authors":"Qing Xu, Shitao Wang, Jiayi Liu, Huihui Song, Y. Qu","doi":"10.1109/iSPEC54162.2022.10033040","DOIUrl":"https://doi.org/10.1109/iSPEC54162.2022.10033040","url":null,"abstract":"As a typical nonlinear coupled system, microgrid has nonlinear coupling relationships between generations and distributions which cannot be ignored. In this paper, the problem of power balance between distributed generators and loads is transformed into the motion synchronization problem of multiple Kuramoto coupled oscillators. And this paper proposes to model an islanded microgrid by using a second-order Kuramoto model. By exploiting the model, our key sight is to address the transient stability problem and find a trapping region expressed explicitly in the parameters. Finally, the similarity between transient stability of islanded microgrid and frequency synchronization of Kuramoto coupled oscillators is analyzed, and the validity of microgrid Kuramoto models is verified based on the 3-generator 5-node islanded microgrid MATLAB/ Simulink simulation platform.","PeriodicalId":129707,"journal":{"name":"2022 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114437663","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 : 2022-12-04DOI: 10.1109/iSPEC54162.2022.10032996
Peiyao Guo, V. Perić, Zhao Yuan
This paper considers the nodal pricing comparison between using the direct current optimal power flow (DCOPF) and the alternative current optimal power flow (ACOPF) models. Two case studies for Iceland and Germany are conducted to illustrate the pricing differences for various load and network congestion scenarios. We also demonstrate the statistical probability distributions of the nodal prices using DCOPF and ACOPF under the considered scenarios. For the case study in Iceland, we use a representative transmission network with 108 nodes, 31 generators and 123 transmission lines. For the case study in Germany, there are 231 nodes, 82 generators and 304 transmission lines. The numerical results show that there can be significant nodal price differences between DCOPF and ACOPF when the power loads are heavy or the power networks are congested. The statistical probability distribution of the nodal prices also show prominent differences for both Iceland and Germany when the power networks are heavily congested.
{"title":"Nodal Pricing Comparison between DCOPF and ACOPF: Case Studies for the Power Systems in Iceland and Germany","authors":"Peiyao Guo, V. Perić, Zhao Yuan","doi":"10.1109/iSPEC54162.2022.10032996","DOIUrl":"https://doi.org/10.1109/iSPEC54162.2022.10032996","url":null,"abstract":"This paper considers the nodal pricing comparison between using the direct current optimal power flow (DCOPF) and the alternative current optimal power flow (ACOPF) models. Two case studies for Iceland and Germany are conducted to illustrate the pricing differences for various load and network congestion scenarios. We also demonstrate the statistical probability distributions of the nodal prices using DCOPF and ACOPF under the considered scenarios. For the case study in Iceland, we use a representative transmission network with 108 nodes, 31 generators and 123 transmission lines. For the case study in Germany, there are 231 nodes, 82 generators and 304 transmission lines. The numerical results show that there can be significant nodal price differences between DCOPF and ACOPF when the power loads are heavy or the power networks are congested. The statistical probability distribution of the nodal prices also show prominent differences for both Iceland and Germany when the power networks are heavily congested.","PeriodicalId":129707,"journal":{"name":"2022 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114696399","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 : 2022-12-04DOI: 10.1109/iSPEC54162.2022.10033007
A. Bagchi, D. Nedic, E. Kennedy, E. Fagan
As transmission system operators on the island of Ireland, EirGrid and SONI are significantly involved in implementing multiple projects aimed at facilitating the integration of renewable resources in the all-island power system. One such key project is to develop necessary tools and technologies to enable safe and secure operation of the power system with instantaneous non-synchronous renewable penetration (quantified using the System Non-Synchronous Penetration (SNSP) metric) levels of up to 75%. This paper presents key findings of detailed technical studies carried out in the domains of voltage, frequency and rotor angle stability to conclusively establish whether operating the all-island power system at SNSP levels of up to 75% has any adverse impact on relevant operational security standards. The studies are carried out using selected system snapshots from a trial period involving 200 hours of system operations with SNSP levels greater than 70%. Both base case and sensitivity studies are conducted, and detailed discussions are presented to establish the root cause behind insecurities observed, if any. Based on the detailed analyses presented, a recommendation is made for implementing system operations with SNSP levels of up to 75% on an enduring basis.
{"title":"Overview of Technical Studies Conducted for Facilitating Increased Renewable Penetration on the Island of Ireland","authors":"A. Bagchi, D. Nedic, E. Kennedy, E. Fagan","doi":"10.1109/iSPEC54162.2022.10033007","DOIUrl":"https://doi.org/10.1109/iSPEC54162.2022.10033007","url":null,"abstract":"As transmission system operators on the island of Ireland, EirGrid and SONI are significantly involved in implementing multiple projects aimed at facilitating the integration of renewable resources in the all-island power system. One such key project is to develop necessary tools and technologies to enable safe and secure operation of the power system with instantaneous non-synchronous renewable penetration (quantified using the System Non-Synchronous Penetration (SNSP) metric) levels of up to 75%. This paper presents key findings of detailed technical studies carried out in the domains of voltage, frequency and rotor angle stability to conclusively establish whether operating the all-island power system at SNSP levels of up to 75% has any adverse impact on relevant operational security standards. The studies are carried out using selected system snapshots from a trial period involving 200 hours of system operations with SNSP levels greater than 70%. Both base case and sensitivity studies are conducted, and detailed discussions are presented to establish the root cause behind insecurities observed, if any. Based on the detailed analyses presented, a recommendation is made for implementing system operations with SNSP levels of up to 75% on an enduring basis.","PeriodicalId":129707,"journal":{"name":"2022 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"264 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122083794","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 : 2022-12-04DOI: 10.1109/iSPEC54162.2022.10033019
Chin Hong Tam, F. Geth, Mithulananthan Nadarajah
With increasing penetration of distributed energy resources in the distribution network, voltage levels become a concern. However, power flow models for these networks are rare due to the complexity to collect and manage large amounts of feeder data in a way that suits engineering analysis. Unfortunately, even the network model exists, the quality of data may not be high enough for power flow analysis. In this paper, a comprehensive 4-wire low-voltage network is built, starting from reliable topology and approximate sequence impedances, and simulation results are compared to the uncleaned data and a simplified 3-wire representation. Power flow with photovoltaic penetration is also carried out. Results indicate that the improved network data has a higher occurrence of undervoltage situations. Using a 4-wire network with neutral wire can more accurately reflect the influence of neutral-to-ground voltage, even in the presence of frequent grounding. Both undervoltage and overvoltage deteriorate with PV penetration due to neutral voltage fluctuation.
{"title":"An Inclusive Model for a Practical Low-Voltage Feeder with Explicit Multi-Grounded Neutral Wire","authors":"Chin Hong Tam, F. Geth, Mithulananthan Nadarajah","doi":"10.1109/iSPEC54162.2022.10033019","DOIUrl":"https://doi.org/10.1109/iSPEC54162.2022.10033019","url":null,"abstract":"With increasing penetration of distributed energy resources in the distribution network, voltage levels become a concern. However, power flow models for these networks are rare due to the complexity to collect and manage large amounts of feeder data in a way that suits engineering analysis. Unfortunately, even the network model exists, the quality of data may not be high enough for power flow analysis. In this paper, a comprehensive 4-wire low-voltage network is built, starting from reliable topology and approximate sequence impedances, and simulation results are compared to the uncleaned data and a simplified 3-wire representation. Power flow with photovoltaic penetration is also carried out. Results indicate that the improved network data has a higher occurrence of undervoltage situations. Using a 4-wire network with neutral wire can more accurately reflect the influence of neutral-to-ground voltage, even in the presence of frequent grounding. Both undervoltage and overvoltage deteriorate with PV penetration due to neutral voltage fluctuation.","PeriodicalId":129707,"journal":{"name":"2022 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129572167","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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