With the ultra/extra high voltage lines put into operation in the power system, the traditional protection principle is challenged and the research of transient volume protection is paid more and more attention. In the fault transient process, the fault traveling wave will pass through the line boundary with obvious transverse reflection phenomenon. Therefore, this paper extracts the local energy characteristics and overall singularity characteristics of the line fault current for k-means clustering analysis. The difference in the wavelet entropy information of the internal and external fault is used to construct the transient protection criterion, which avoids the difficulty of transient protection settings and realizes the fast and correct action of protection. The results of PSCAD/EMTDC simulation show that the protection method can correctly perform fast fault detection and is little affected by fault location, fault type, transition resistance and line length factors.
{"title":"Transient Protection of EHV AC Line Based on Wavelet Packet Entropy","authors":"Zebing Shi, Lu Chu, Jiang Yu, Xiaobing Ding, Honghui Gao, Zengping Wang, Tong Wang, Qian Xu","doi":"10.1109/ICoPESA54515.2022.9754400","DOIUrl":"https://doi.org/10.1109/ICoPESA54515.2022.9754400","url":null,"abstract":"With the ultra/extra high voltage lines put into operation in the power system, the traditional protection principle is challenged and the research of transient volume protection is paid more and more attention. In the fault transient process, the fault traveling wave will pass through the line boundary with obvious transverse reflection phenomenon. Therefore, this paper extracts the local energy characteristics and overall singularity characteristics of the line fault current for k-means clustering analysis. The difference in the wavelet entropy information of the internal and external fault is used to construct the transient protection criterion, which avoids the difficulty of transient protection settings and realizes the fast and correct action of protection. The results of PSCAD/EMTDC simulation show that the protection method can correctly perform fast fault detection and is little affected by fault location, fault type, transition resistance and line length factors.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114547638","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 : 2022-02-25DOI: 10.1109/ICoPESA54515.2022.9754456
Tao Chen, Qinran Hu, Yifei Wang, Xiangjun Quan, Fei Zhang, Xingyu Yan
In this paper, we study a residential energy arbitrage problem with consideration of the user’s demand response or energy consumption behavior. In addition, the energy arbitrage is analyzed using a novel accurate battery model with degradation cost incorporated. Compared with grid-scale battery energy storage system applications, the residential customer is usually very sensitive to any different pricing signal minutiae, including both electricity price and the demand response incentives. The customer should carefully balance the economic gain from energy arbitrage opportunities and the battery degradation cost, meanwhile considering the load flexibility from ordinary daily life. Through some experimental analysis, it is believed that the residential customer can also benefit from the optimal operation of the household facilities, as the same as the large-scale grid-level battery energy storage system applications.
{"title":"Residential Energy Arbitrage Considering Demand Response and Accurate Battery Model with Degradation Cost","authors":"Tao Chen, Qinran Hu, Yifei Wang, Xiangjun Quan, Fei Zhang, Xingyu Yan","doi":"10.1109/ICoPESA54515.2022.9754456","DOIUrl":"https://doi.org/10.1109/ICoPESA54515.2022.9754456","url":null,"abstract":"In this paper, we study a residential energy arbitrage problem with consideration of the user’s demand response or energy consumption behavior. In addition, the energy arbitrage is analyzed using a novel accurate battery model with degradation cost incorporated. Compared with grid-scale battery energy storage system applications, the residential customer is usually very sensitive to any different pricing signal minutiae, including both electricity price and the demand response incentives. The customer should carefully balance the economic gain from energy arbitrage opportunities and the battery degradation cost, meanwhile considering the load flexibility from ordinary daily life. Through some experimental analysis, it is believed that the residential customer can also benefit from the optimal operation of the household facilities, as the same as the large-scale grid-level battery energy storage system applications.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115103071","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 quickly and accurately detect and locate the insulator and its damage in the transmission line, by studying the YOLO (you only look once) series target detection algorithm model based on deep learning, a detection method based on YOLOv5 is proposed to achieve fast and accurate detection. By applying the network to the aerial insulator data set for training, the experimental results show that the highest AP (Average Precision) value based on YOLOv5 insulator detection is 96.47%, the highest AP value of insulator damage is 99.17%, and the overall m-AP (mean Average Precision) value is 97.82%. At the same time, YOLOv5s has a higher detection rate, and the real-time detection speed is 43.2FPS (Frames Per Second). The experimental results show that the target detection network based on YOLOv5 series has higher accuracy and faster calculation speed for transmission line insulator detection and damage identification under complex background, at the same time, the lightweight model of YOLOv5s is conducive to the deployment of UAV (Unmanned Aerial Vehicle) end model and improve inspection efficiency.
为了快速准确地检测和定位输电线路中的绝缘子及其损伤，通过研究基于深度学习的YOLO (you only look once)系列目标检测算法模型，提出了一种基于YOLOv5的检测方法，实现快速准确的检测。将该网络应用于架空绝缘子数据集进行训练，实验结果表明，基于YOLOv5绝缘子检测的最高AP (Average Precision)值为96.47%，绝缘子损坏的最高AP值为99.17%，总体m-AP (mean Average Precision)值为97.82%。同时，YOLOv5s具有更高的检测率，实时检测速度为43.2FPS (Frames Per Second)。实验结果表明，基于YOLOv5系列的目标检测网络对于复杂背景下的输电线路绝缘子检测和损伤识别具有更高的精度和更快的计算速度，同时，YOLOv5的轻量化模型有利于无人机(Unmanned Aerial Vehicle)终端模型的部署，提高检测效率。
{"title":"Insulator and Damage Detection and Location Based on YOLOv5","authors":"Qiang Li, Feng Zhao, Zhongping Xu, Jing Wang, Kaipei Liu, Liang Qin","doi":"10.1109/ICoPESA54515.2022.9754476","DOIUrl":"https://doi.org/10.1109/ICoPESA54515.2022.9754476","url":null,"abstract":"In order to quickly and accurately detect and locate the insulator and its damage in the transmission line, by studying the YOLO (you only look once) series target detection algorithm model based on deep learning, a detection method based on YOLOv5 is proposed to achieve fast and accurate detection. By applying the network to the aerial insulator data set for training, the experimental results show that the highest AP (Average Precision) value based on YOLOv5 insulator detection is 96.47%, the highest AP value of insulator damage is 99.17%, and the overall m-AP (mean Average Precision) value is 97.82%. At the same time, YOLOv5s has a higher detection rate, and the real-time detection speed is 43.2FPS (Frames Per Second). The experimental results show that the target detection network based on YOLOv5 series has higher accuracy and faster calculation speed for transmission line insulator detection and damage identification under complex background, at the same time, the lightweight model of YOLOv5s is conducive to the deployment of UAV (Unmanned Aerial Vehicle) end model and improve inspection efficiency.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126829550","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 : 2022-02-25DOI: 10.1109/ICoPESA54515.2022.9754412
Haihong Qin, Yueru Yang, Sixuan Xie, Jiangjin Peng, Haoxiang Hu, F. Bu
The short-circuit capability is one of the important issues that are related to the safe operation of silicon carbide (SiC) MOSFETs. The short-circuit mechanism of SiC MOSFET is analyzed, and the impact of driving circuit parameters on short-circuit characteristics is presented. Compared to IGBT modules, SiC modules have higher di/dt and weaker ruggedness, so the conventional desaturation protection circuit cannot be directly used for SiC modules due to its relatively slow response. Thus we put forward a novel desaturation protection circuit, and present the comparison between the conventional protection circuit and the novel one. At last, short-circuit protection tests under typical hard switching fault and fault under load was conducted to verify the effectiveness of the novel desaturation protection circuit. The experimental results show that the novel desaturation protection method has a faster protection speed than the conventional one, and can ensure the reliable operation of SiC MOSFET power modules.
{"title":"Analysis of Short-Circuit Characteristics and the Design of a Novel Protection Circuit for SiC MOSFETs","authors":"Haihong Qin, Yueru Yang, Sixuan Xie, Jiangjin Peng, Haoxiang Hu, F. Bu","doi":"10.1109/ICoPESA54515.2022.9754412","DOIUrl":"https://doi.org/10.1109/ICoPESA54515.2022.9754412","url":null,"abstract":"The short-circuit capability is one of the important issues that are related to the safe operation of silicon carbide (SiC) MOSFETs. The short-circuit mechanism of SiC MOSFET is analyzed, and the impact of driving circuit parameters on short-circuit characteristics is presented. Compared to IGBT modules, SiC modules have higher di/dt and weaker ruggedness, so the conventional desaturation protection circuit cannot be directly used for SiC modules due to its relatively slow response. Thus we put forward a novel desaturation protection circuit, and present the comparison between the conventional protection circuit and the novel one. At last, short-circuit protection tests under typical hard switching fault and fault under load was conducted to verify the effectiveness of the novel desaturation protection circuit. The experimental results show that the novel desaturation protection method has a faster protection speed than the conventional one, and can ensure the reliable operation of SiC MOSFET power modules.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"33 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114104760","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 : 2022-02-25DOI: 10.1109/ICoPESA54515.2022.9754438
Siyu Tao, Chaohai Zhang, Gang Zheng
This paper proposes an optimization framework to jointly determine the configuration and operation of a wind farm (WF) and battery energy storage system (BESS). The upper layer model determines the WF/BESS capacities, the WF layout, the integration buses, and is solved by the mixed-discrete particle swarm optimization (MDPSO) algorithm. The lower layer model is a multi-objective optimization problem (MOOP) deciding the operation of the WF/BESS and other generators considering demand side management (DSM). The maximum fuzzy satisfaction method (MFSM) is used to transform the MOOP in the lower layer model into a single objective optimization problem (SOOP), and solved by the particle swarm optimization (PSO). This method is verified by the test cases of a real WF. Simulation results indicate that DSM, and the wind/load patterns can influence the WF/BESS optimization.
{"title":"Coordinated Optimization of the Planning and Operation of a WF/BESS","authors":"Siyu Tao, Chaohai Zhang, Gang Zheng","doi":"10.1109/ICoPESA54515.2022.9754438","DOIUrl":"https://doi.org/10.1109/ICoPESA54515.2022.9754438","url":null,"abstract":"This paper proposes an optimization framework to jointly determine the configuration and operation of a wind farm (WF) and battery energy storage system (BESS). The upper layer model determines the WF/BESS capacities, the WF layout, the integration buses, and is solved by the mixed-discrete particle swarm optimization (MDPSO) algorithm. The lower layer model is a multi-objective optimization problem (MOOP) deciding the operation of the WF/BESS and other generators considering demand side management (DSM). The maximum fuzzy satisfaction method (MFSM) is used to transform the MOOP in the lower layer model into a single objective optimization problem (SOOP), and solved by the particle swarm optimization (PSO). This method is verified by the test cases of a real WF. Simulation results indicate that DSM, and the wind/load patterns can influence the WF/BESS optimization.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114223960","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 : 2022-02-25DOI: 10.1109/ICoPESA54515.2022.9754382
Kesong Zhang, Xikun Chen, Zehui Peng, Yongjian Chen, Guo Wei, S. Ze
To enrich the functions of the flyback converter, enable it to achieve high-efficiency and high-power density, and at the same time have more flexibility and apply to more occasions, in this paper, GaN HEMT and transient voltage suppressor (TVS) are used to design a high-efficiency, high-power density, wide-input and wide-output power supply based on quasi-resonant flyback converter (QRFC). To solve the problem that the gate drive voltage requirement of GaN HEMT is different from that of Si-MOSFET, a corresponding drive level conversion circuit is designed. In order to solve the problem of the power supply of the controller when the output is in a wide range, the power supply circuit of the wide-range controller is studied. In view of the cumbersome design and calculation of the traditional resistor capacitor diode (RCD) clamping circuit and the large loss of energy, TVS is used to redesign the clamping circuit to avoid the calculation and selection problems of the clamping capacitor C and the discharge resistance R. The loss is smaller and the design is more convenient. Aiming at the difficulty of designing transformer core and primary inductance when the switching frequency changes, a switching frequency interval estimation method based on the constraints of switching loss and output filter capacitor conditions is proposed to simplify the design of the transformer. The experimental results show that the high-efficiency, high-power density and wide-range power supply designed in this paper can achieve input 90-265VACrms, rated 220VACrms, output 5-15V wide-range adjustable, full load up to 75W, power density up to 17.44 W/inch3, and the highest efficiency can reach 92.6%, and the output ripple voltage is less than 50mV.
{"title":"High-Efficiency, High-Power Density and Wide-Range Power Supply Design Based on GaN HEMT","authors":"Kesong Zhang, Xikun Chen, Zehui Peng, Yongjian Chen, Guo Wei, S. Ze","doi":"10.1109/ICoPESA54515.2022.9754382","DOIUrl":"https://doi.org/10.1109/ICoPESA54515.2022.9754382","url":null,"abstract":"To enrich the functions of the flyback converter, enable it to achieve high-efficiency and high-power density, and at the same time have more flexibility and apply to more occasions, in this paper, GaN HEMT and transient voltage suppressor (TVS) are used to design a high-efficiency, high-power density, wide-input and wide-output power supply based on quasi-resonant flyback converter (QRFC). To solve the problem that the gate drive voltage requirement of GaN HEMT is different from that of Si-MOSFET, a corresponding drive level conversion circuit is designed. In order to solve the problem of the power supply of the controller when the output is in a wide range, the power supply circuit of the wide-range controller is studied. In view of the cumbersome design and calculation of the traditional resistor capacitor diode (RCD) clamping circuit and the large loss of energy, TVS is used to redesign the clamping circuit to avoid the calculation and selection problems of the clamping capacitor C and the discharge resistance R. The loss is smaller and the design is more convenient. Aiming at the difficulty of designing transformer core and primary inductance when the switching frequency changes, a switching frequency interval estimation method based on the constraints of switching loss and output filter capacitor conditions is proposed to simplify the design of the transformer. The experimental results show that the high-efficiency, high-power density and wide-range power supply designed in this paper can achieve input 90-265VACrms, rated 220VACrms, output 5-15V wide-range adjustable, full load up to 75W, power density up to 17.44 W/inch3, and the highest efficiency can reach 92.6%, and the output ripple voltage is less than 50mV.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116642429","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 : 2022-02-25DOI: 10.1109/ICoPESA54515.2022.9754392
Junduo Wen, Haoyuan Jin, Xiaobo Dong, Zhenyu Wang, Yi Liu, Chenya Wang, Hang Kong, Laili Wang
During the design of the dual active bridge (DAB), accurately calculating the losses and the temperature rise of the inductor in it is very important for the reliable operation of the whole circuit which is built by wide band-gap semiconductors. This paper presents a general method for accurate and convenient inductor current characteristic values estimation based on DAB operating characteristics. This paper gives a model for calculating the core loss and winding loss of the inductor based on these characteristic values and gives the temperature rise caused by losses. The commutation process and resonance process during DAB operation are analyzed, and two kinds of magnetic flux density loops of the inductor in DAB are given. An experimental platform with DAB based on SiC MOSFET was built. The experimental results show that the errors between the estimated values calculated by the given methods and the measured values are less than 4%.
{"title":"Current Characteristic Values Estimation for Losses Calculation of Inductor in Dual Active Bridge","authors":"Junduo Wen, Haoyuan Jin, Xiaobo Dong, Zhenyu Wang, Yi Liu, Chenya Wang, Hang Kong, Laili Wang","doi":"10.1109/ICoPESA54515.2022.9754392","DOIUrl":"https://doi.org/10.1109/ICoPESA54515.2022.9754392","url":null,"abstract":"During the design of the dual active bridge (DAB), accurately calculating the losses and the temperature rise of the inductor in it is very important for the reliable operation of the whole circuit which is built by wide band-gap semiconductors. This paper presents a general method for accurate and convenient inductor current characteristic values estimation based on DAB operating characteristics. This paper gives a model for calculating the core loss and winding loss of the inductor based on these characteristic values and gives the temperature rise caused by losses. The commutation process and resonance process during DAB operation are analyzed, and two kinds of magnetic flux density loops of the inductor in DAB are given. An experimental platform with DAB based on SiC MOSFET was built. The experimental results show that the errors between the estimated values calculated by the given methods and the measured values are less than 4%.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125243169","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 : 2022-02-25DOI: 10.1109/ICoPESA54515.2022.9754387
Zhang Wen, L. Yao, Shuai Liang, Rusi Chen, Jian Xu, F. Cheng
Large-scale grid-connected renewable energy sources (RES) pose a serious threat to the frequency stability of the power system. Considering the active power flexible regulation ability for wind turbines (WTs), the gradual increase in the penetration level of wind power (WP) has led to growing interest in the capability of WP participating in the power system frequency regulation. Therefore, this paper reviews the current research status of WP participating in frequency regulation from WT level, wind farm (WF) level, and power system level, respectively. At the WT level, the existing WT types and the characteristics of various frequency regulation strategies are analyzed. At the WF level, the coordinated controls within the WFs are further discussed, which contain the active power distribution between WTs and rotor speed recovery coordinated control. At the system level, the coordinated frequency controls of WP with other generation resources and energy storage systems are presented. The advantages and disadvantages of each frequency participation strategy are also discussed and compared. Finally, the prospects of WP frequency regulation are expected with further research attention.
{"title":"Retrospect and Prospect of Wind Power Participating in Power System Frequency Regulation","authors":"Zhang Wen, L. Yao, Shuai Liang, Rusi Chen, Jian Xu, F. Cheng","doi":"10.1109/ICoPESA54515.2022.9754387","DOIUrl":"https://doi.org/10.1109/ICoPESA54515.2022.9754387","url":null,"abstract":"Large-scale grid-connected renewable energy sources (RES) pose a serious threat to the frequency stability of the power system. Considering the active power flexible regulation ability for wind turbines (WTs), the gradual increase in the penetration level of wind power (WP) has led to growing interest in the capability of WP participating in the power system frequency regulation. Therefore, this paper reviews the current research status of WP participating in frequency regulation from WT level, wind farm (WF) level, and power system level, respectively. At the WT level, the existing WT types and the characteristics of various frequency regulation strategies are analyzed. At the WF level, the coordinated controls within the WFs are further discussed, which contain the active power distribution between WTs and rotor speed recovery coordinated control. At the system level, the coordinated frequency controls of WP with other generation resources and energy storage systems are presented. The advantages and disadvantages of each frequency participation strategy are also discussed and compared. Finally, the prospects of WP frequency regulation are expected with further research attention.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"144 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113987158","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 : 2022-02-25DOI: 10.1109/ICoPESA54515.2022.9754443
N. Ahmed, Yin Zhongdong, Tahira Mumtaz, Taha Ather, Kyalumba Kabamba Rudy, Salman Murtaza
Flexible AC Transmission (FACTS) technology is combination of modern power electronics and traditional power flow controls technology. TCSC uses highly reliable, high-power Thyristor components to replace mechanical HVAC switches, so that the electrical parameters can be quickly adjusted in reducing power loss, greatly improving system stability and reliability by impedance adjustment. In this paper, MATLAB simulation of two bus system connected by 230kV Double Transmission Line to the load is presented, to study power flow with a comparison of the system feature with and without TCSC. The working characteristics of TCSC indicate the operating adjustment range of TCSC under various load conditions. The main factors affecting the operating characteristics of TCSC include the controlled firing angle accuracy of the Thyristor, the rated voltage of the FSC and the rated current of the TCR. Another important point of the study is influence of TCSC device parameter design on power system, which indicates that the TCSC greatly improves the real power flow performance in HVAC system and helps in minimizing the power loss.
{"title":"Comprehensive Comparative Analysis of TCSC on Power Flow Regulation in HVAC System","authors":"N. Ahmed, Yin Zhongdong, Tahira Mumtaz, Taha Ather, Kyalumba Kabamba Rudy, Salman Murtaza","doi":"10.1109/ICoPESA54515.2022.9754443","DOIUrl":"https://doi.org/10.1109/ICoPESA54515.2022.9754443","url":null,"abstract":"Flexible AC Transmission (FACTS) technology is combination of modern power electronics and traditional power flow controls technology. TCSC uses highly reliable, high-power Thyristor components to replace mechanical HVAC switches, so that the electrical parameters can be quickly adjusted in reducing power loss, greatly improving system stability and reliability by impedance adjustment. In this paper, MATLAB simulation of two bus system connected by 230kV Double Transmission Line to the load is presented, to study power flow with a comparison of the system feature with and without TCSC. The working characteristics of TCSC indicate the operating adjustment range of TCSC under various load conditions. The main factors affecting the operating characteristics of TCSC include the controlled firing angle accuracy of the Thyristor, the rated voltage of the FSC and the rated current of the TCR. Another important point of the study is influence of TCSC device parameter design on power system, which indicates that the TCSC greatly improves the real power flow performance in HVAC system and helps in minimizing the power loss.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"207 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131479333","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 : 2022-02-25DOI: 10.1109/ICoPESA54515.2022.9754401
L. Xu, JiJiong Mi
Existing method usually regard the whole direct-drive wind farm as a single turbine or use aggregated equivalent method, which ignored the inside-wind-farm sub-synchronous oscillation (SSO) modes and cannot analyze the stability difference of turbines under different working conditions. Firstly, the eigenvalue method is used to analyze the power system connected with multiple PMSGs, and found the system exist the "wind-farm-grid SSO modes" led by wind turbine and the power grid and the "inside-wind-farm SSO modes" led by DVC links of different wind turbines, Further, based on the root locus, it is judged that the priority of suppressing "wind-farm-grid SSO mode" is higher than that of suppressing "inside-wind-farm SSO modes". Then using eigenvalue method, found the SSO suppression priority of the PMSGs with weak output power or far away from the collecting bus is higher than that of the PMSGs with strong output power or near the collecting bus. It also gives emergency parameter adjustment and order cut-off scheme considering the suppression priority. Time-domain simulation based on PSCAD/EMTDC platform verifies the validity of the above conclusions.
{"title":"SSO Suppression Priority Analysis of Multi-mode and Multi-condition Units in Large-Scale Direct-Drive Wind Farms","authors":"L. Xu, JiJiong Mi","doi":"10.1109/ICoPESA54515.2022.9754401","DOIUrl":"https://doi.org/10.1109/ICoPESA54515.2022.9754401","url":null,"abstract":"Existing method usually regard the whole direct-drive wind farm as a single turbine or use aggregated equivalent method, which ignored the inside-wind-farm sub-synchronous oscillation (SSO) modes and cannot analyze the stability difference of turbines under different working conditions. Firstly, the eigenvalue method is used to analyze the power system connected with multiple PMSGs, and found the system exist the \"wind-farm-grid SSO modes\" led by wind turbine and the power grid and the \"inside-wind-farm SSO modes\" led by DVC links of different wind turbines, Further, based on the root locus, it is judged that the priority of suppressing \"wind-farm-grid SSO mode\" is higher than that of suppressing \"inside-wind-farm SSO modes\". Then using eigenvalue method, found the SSO suppression priority of the PMSGs with weak output power or far away from the collecting bus is higher than that of the PMSGs with strong output power or near the collecting bus. It also gives emergency parameter adjustment and order cut-off scheme considering the suppression priority. Time-domain simulation based on PSCAD/EMTDC platform verifies the validity of the above conclusions.","PeriodicalId":142509,"journal":{"name":"2022 International Conference on Power Energy Systems and Applications (ICoPESA)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133958757","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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