Pub Date : 2022-12-13DOI: 10.1109/MEPCON55441.2022.10021808
Abdelrahman A. Othman, Hamdy Shatla, M. Hamdy
This paper represents a comparative study of autotuned proportional-integral-derivative (PID) controller based on different sliding mode control (SMC) schemes for the DC motor speed control such as traditional SMC, fuzzy SMC (Fuzzy-SMC), fuzzy terminal SMC (Fuzzy-TSMC) and fuzzy fast terminal SMC (Fuzzy-FTSMC) schemes to treat uncertainties existing in the DC motor model in practical validation. The DC motor have little change in its parameters, in addition, surrounding conditions vary from one time to another, this makes a very difficult to choose an appropriate controller, so that the researchers resort to using an adaptive controller to control the DC motor to improve the performance and increase the stability against the uncertainties. The auto tuned PID controller automatically compensates for variations in system dynamics by adjusting the controller characteristics so that the overall system performance remains the same, or rather maintained at optimum level. The experimental results were obtained to verify the applicability and effectiveness of the proposed control scheme against external disturbance and model uncertainties with a comparative study.
{"title":"A Comparative Study of Auto-tuned PID Controller based on Different SMC Schemes for a DC Motor Speed Control: Practical Validation","authors":"Abdelrahman A. Othman, Hamdy Shatla, M. Hamdy","doi":"10.1109/MEPCON55441.2022.10021808","DOIUrl":"https://doi.org/10.1109/MEPCON55441.2022.10021808","url":null,"abstract":"This paper represents a comparative study of autotuned proportional-integral-derivative (PID) controller based on different sliding mode control (SMC) schemes for the DC motor speed control such as traditional SMC, fuzzy SMC (Fuzzy-SMC), fuzzy terminal SMC (Fuzzy-TSMC) and fuzzy fast terminal SMC (Fuzzy-FTSMC) schemes to treat uncertainties existing in the DC motor model in practical validation. The DC motor have little change in its parameters, in addition, surrounding conditions vary from one time to another, this makes a very difficult to choose an appropriate controller, so that the researchers resort to using an adaptive controller to control the DC motor to improve the performance and increase the stability against the uncertainties. The auto tuned PID controller automatically compensates for variations in system dynamics by adjusting the controller characteristics so that the overall system performance remains the same, or rather maintained at optimum level. The experimental results were obtained to verify the applicability and effectiveness of the proposed control scheme against external disturbance and model uncertainties with a comparative study.","PeriodicalId":174878,"journal":{"name":"2022 23rd International Middle East Power Systems Conference (MEPCON)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128523536","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 : 2022-12-13DOI: 10.1109/MEPCON55441.2022.10021778
M. Emara, E. G. Atiya, D. Mansour
Lately, gas-to-liquid (GTL) oil usage has a great trend as cooling and dielectric medium in power transformers due to their good properties, represented by its purity, chemical uniformity, and better performance than conventional oils. By the way, the study of GTL oil effect in comparison to conventional mineral oil (MO) on the electrical properties of the insulation paper under thermal aging is presented in this paper. Thermal aging samples were obtained based on an accelerated thermal aging test in the laboratory, that simulates the thermal stress in the service. Two different aging durations (i.e., 3 and 6 days) are applied to the two different oil types. Pure oils and aged oil samples were tested for dielectric losses and dielectric constant for a range of frequencies from 20 Hz to 2 MHz. In addition, insulation papers were impregnated in the same samples to check their effect by thermal aging. The results indicated that aging has a lower impact on the properties of GTL oil and GTL oil-paper insulation under aging conditions compared to that of MO.
{"title":"Impact of Aging on Dielectric Properties of Oil-Paper Insulation System using Gas-to-Liquid Oil and Mineral Oil","authors":"M. Emara, E. G. Atiya, D. Mansour","doi":"10.1109/MEPCON55441.2022.10021778","DOIUrl":"https://doi.org/10.1109/MEPCON55441.2022.10021778","url":null,"abstract":"Lately, gas-to-liquid (GTL) oil usage has a great trend as cooling and dielectric medium in power transformers due to their good properties, represented by its purity, chemical uniformity, and better performance than conventional oils. By the way, the study of GTL oil effect in comparison to conventional mineral oil (MO) on the electrical properties of the insulation paper under thermal aging is presented in this paper. Thermal aging samples were obtained based on an accelerated thermal aging test in the laboratory, that simulates the thermal stress in the service. Two different aging durations (i.e., 3 and 6 days) are applied to the two different oil types. Pure oils and aged oil samples were tested for dielectric losses and dielectric constant for a range of frequencies from 20 Hz to 2 MHz. In addition, insulation papers were impregnated in the same samples to check their effect by thermal aging. The results indicated that aging has a lower impact on the properties of GTL oil and GTL oil-paper insulation under aging conditions compared to that of MO.","PeriodicalId":174878,"journal":{"name":"2022 23rd International Middle East Power Systems Conference (MEPCON)","volume":"318 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121836178","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 : 2022-12-13DOI: 10.1109/MEPCON55441.2022.10021790
M. A. Kabeel, M. M. Eladany, A. A. ElDesouky
The increased deployment of renewable energy sources (RES) as distributed generation (DG) in power grids brings a challenge to the protection scheme. Due to different penetration levels of RES during a day, the fault currents at the same point of the microgrid (MG) vary significantly. Since, the MG presents two different levels of fault current according to grid-tied mode or islanded mode. Consequently, the conventional overcurrent coordination protection schemes must be developed. This paper proposes an improved centralized protection strategy for AC MG with bulky DG penetration. The proposed strategy depends on communication-based overcurrent relays with a centralized unit using an artificial neural network (ANN) with symmetrical components as feature extraction. The proposed algorithm provides fast fault detection and fault location. The evaluation of the proposed strategy is validated on IEEE 9-bus system using Matlab/Simulink software. The system is examined under different operating conditions of MG and different fault types at different fault resistance and achieved remarkable results.
{"title":"A Centralized Protection Scheme for Microgrids with Artificial Neural Network-Based on Fault Detection and Location","authors":"M. A. Kabeel, M. M. Eladany, A. A. ElDesouky","doi":"10.1109/MEPCON55441.2022.10021790","DOIUrl":"https://doi.org/10.1109/MEPCON55441.2022.10021790","url":null,"abstract":"The increased deployment of renewable energy sources (RES) as distributed generation (DG) in power grids brings a challenge to the protection scheme. Due to different penetration levels of RES during a day, the fault currents at the same point of the microgrid (MG) vary significantly. Since, the MG presents two different levels of fault current according to grid-tied mode or islanded mode. Consequently, the conventional overcurrent coordination protection schemes must be developed. This paper proposes an improved centralized protection strategy for AC MG with bulky DG penetration. The proposed strategy depends on communication-based overcurrent relays with a centralized unit using an artificial neural network (ANN) with symmetrical components as feature extraction. The proposed algorithm provides fast fault detection and fault location. The evaluation of the proposed strategy is validated on IEEE 9-bus system using Matlab/Simulink software. The system is examined under different operating conditions of MG and different fault types at different fault resistance and achieved remarkable results.","PeriodicalId":174878,"journal":{"name":"2022 23rd International Middle East Power Systems Conference (MEPCON)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114456326","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 : 2022-12-13DOI: 10.1109/MEPCON55441.2022.10021760
Khaled M. Bassiony, W. Omran, A. Abdelaziz
This study provides an approach for hybrid AC/DC microgrids (MGs) planning. The proposed strategy objective is to reduce overall planning expenses, including investment and running costs. This is achieved by selecting each bus type and each feeder type to be DC or AC. The provided model takes into account line power loss and converter efficiency. The planning problem is formulated as a single objective optimization problem, which is implemented in MATLAB software using the Marine Predator Algorithm (MPA). The system used to assess the aforementioned planning model consists of 13-bus network, each including various elements of distributed generators (DGs) and loads such as electric vehicles (EVs) charging units, wind turbine generators (WT), and solar photovoltaic systems (PV). The efficiency of the presented planning model is evaluated by contrasting its output with the traditional AC planning and DC planning solutions. The simulation outcomes demonstrate that the hybrid AC/DC microgrid planning model is efficient and achieves cost savings when compared to the conventional AC and DC planning approaches.
{"title":"A Planning Model for Hybrid AC/DC Microgrids Using Marine Predator Optimization Technique","authors":"Khaled M. Bassiony, W. Omran, A. Abdelaziz","doi":"10.1109/MEPCON55441.2022.10021760","DOIUrl":"https://doi.org/10.1109/MEPCON55441.2022.10021760","url":null,"abstract":"This study provides an approach for hybrid AC/DC microgrids (MGs) planning. The proposed strategy objective is to reduce overall planning expenses, including investment and running costs. This is achieved by selecting each bus type and each feeder type to be DC or AC. The provided model takes into account line power loss and converter efficiency. The planning problem is formulated as a single objective optimization problem, which is implemented in MATLAB software using the Marine Predator Algorithm (MPA). The system used to assess the aforementioned planning model consists of 13-bus network, each including various elements of distributed generators (DGs) and loads such as electric vehicles (EVs) charging units, wind turbine generators (WT), and solar photovoltaic systems (PV). The efficiency of the presented planning model is evaluated by contrasting its output with the traditional AC planning and DC planning solutions. The simulation outcomes demonstrate that the hybrid AC/DC microgrid planning model is efficient and achieves cost savings when compared to the conventional AC and DC planning approaches.","PeriodicalId":174878,"journal":{"name":"2022 23rd International Middle East Power Systems Conference (MEPCON)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117039078","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 : 2022-12-13DOI: 10.1109/MEPCON55441.2022.10021747
S. A. Mohammed, L. Nasrat, A. Shaheen
Silicone polymers inherently have good electrical insulating qualities. It is non-conductive due to its chemical nature and when combined with suitable fillers and additives it is used to produce rubber for a variety of electrical insulation applications. Inorganic fillers have attracted wide attention to improve the electrical properties of polymer insulating materials. In order to improve the electrical performance of polymeric silicone rubber insulators used in high-voltage transmission lines, micron- and nano-sized inorganic fillers have been added to the silicone rubber matrix. To improve the electrical properties of silicone rubber, an aluminum oxide (Al2O3) filler was added. In this paper, silicone rubber (SIR) composite samples were prepared by mixing nano-Al2O3 with content of 1, 3, 5 and 7 wt%. The dielectric strength of the compounds is tested under various conditions such as dry, wet, humid low salinity and wet high salinity conditions. The optimum concentration of Al2O3 nano-filler that could improve the dielectric strength of SIR was estimated using Hybrid Gray Wolf and Cuckoo Search Optimization Algorithm (GWCSOA) technology. The results indicate that the electrical performance of the nanocomposites increases with increasing filler concentration.
{"title":"Improvement of Nanodieleetrics for Power Cables","authors":"S. A. Mohammed, L. Nasrat, A. Shaheen","doi":"10.1109/MEPCON55441.2022.10021747","DOIUrl":"https://doi.org/10.1109/MEPCON55441.2022.10021747","url":null,"abstract":"Silicone polymers inherently have good electrical insulating qualities. It is non-conductive due to its chemical nature and when combined with suitable fillers and additives it is used to produce rubber for a variety of electrical insulation applications. Inorganic fillers have attracted wide attention to improve the electrical properties of polymer insulating materials. In order to improve the electrical performance of polymeric silicone rubber insulators used in high-voltage transmission lines, micron- and nano-sized inorganic fillers have been added to the silicone rubber matrix. To improve the electrical properties of silicone rubber, an aluminum oxide (Al2O3) filler was added. In this paper, silicone rubber (SIR) composite samples were prepared by mixing nano-Al2O3 with content of 1, 3, 5 and 7 wt%. The dielectric strength of the compounds is tested under various conditions such as dry, wet, humid low salinity and wet high salinity conditions. The optimum concentration of Al2O3 nano-filler that could improve the dielectric strength of SIR was estimated using Hybrid Gray Wolf and Cuckoo Search Optimization Algorithm (GWCSOA) technology. The results indicate that the electrical performance of the nanocomposites increases with increasing filler concentration.","PeriodicalId":174878,"journal":{"name":"2022 23rd International Middle East Power Systems Conference (MEPCON)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126610476","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 : 2022-12-13DOI: 10.1109/MEPCON55441.2022.10021761
M. Darwish, Mohamed H. A. Hassan, N. Abdel-Gawad, D. Mansour
The condition assessment of power transformers by evaluating the state of their insulating system is of great importance according to the electrical utilities. Since, as early as the insulation deterioration is detected, the probability of a sudden system outage is significantly reduced. Regarding that, there are several methods through which the transformer condition can be determined. Recently, the utilization of optical spectroscopy techniques in condition monitoring based on oil quality analysis has attracted attention in many research papers. Therefore, the contribution of this paper is to check the reliability of estimating the transformer's Health index (HI) percentage based on the optical spectroscopy techniques. So, pure mineral oil samples were thermally aged in the laboratory for various ageing durations. Then, all of them were examined by ultraviolet-visible (UV-Vis) spectroscopy for determining the dissolved decay products (DDP) in each sample. After that, the HI percentages were estimated for the transformers simulated by these aged samples according to their DDP values. In the final analysis, this optical method has proven its potential in being a superior alternative to conventional techniques in estimating the transformer's HI percentage.
{"title":"A New Method for Estimating Transformer Health Index Based on Ultraviolet-Visible Spectroscopy","authors":"M. Darwish, Mohamed H. A. Hassan, N. Abdel-Gawad, D. Mansour","doi":"10.1109/MEPCON55441.2022.10021761","DOIUrl":"https://doi.org/10.1109/MEPCON55441.2022.10021761","url":null,"abstract":"The condition assessment of power transformers by evaluating the state of their insulating system is of great importance according to the electrical utilities. Since, as early as the insulation deterioration is detected, the probability of a sudden system outage is significantly reduced. Regarding that, there are several methods through which the transformer condition can be determined. Recently, the utilization of optical spectroscopy techniques in condition monitoring based on oil quality analysis has attracted attention in many research papers. Therefore, the contribution of this paper is to check the reliability of estimating the transformer's Health index (HI) percentage based on the optical spectroscopy techniques. So, pure mineral oil samples were thermally aged in the laboratory for various ageing durations. Then, all of them were examined by ultraviolet-visible (UV-Vis) spectroscopy for determining the dissolved decay products (DDP) in each sample. After that, the HI percentages were estimated for the transformers simulated by these aged samples according to their DDP values. In the final analysis, this optical method has proven its potential in being a superior alternative to conventional techniques in estimating the transformer's HI percentage.","PeriodicalId":174878,"journal":{"name":"2022 23rd International Middle East Power Systems Conference (MEPCON)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123937984","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 : 2022-12-13DOI: 10.1109/MEPCON55441.2022.10021709
Eman A. Awad, E. Badran
This paper investigates the effect of using transient recovery voltage (TRV)responsive VCB model in renewable energy systems of different transmission nature. The VCB model takes into account TRVreigniting operational feature. In this study, theVCB model is subjected to a diverse study for its use in renewable energy systems of different nature. At first, the VCB model is used to de-energized a series of wind turbines at an offshore wind farm connected to the onshore with a submarine cable. Then, the VCB is integrated at a hybrid microgrid powered by PV, wind turbines and hydro generation systems with a transmission system consisting only of overhead lines. A tool in the Alternating transient program (A$T$P/EM$T$P) software is represented using the Model language to simulate the VCB model. ATP/EMTP is used to simulate the tested systems. The results conclude that the represented VCB model is recommended for the switching studies as its sensible to TRV reigniting operational featurerenewable energy resources transmission systems
{"title":"Reigniting Model of VCB for Renewable Energy ResourcesTransmission Systems","authors":"Eman A. Awad, E. Badran","doi":"10.1109/MEPCON55441.2022.10021709","DOIUrl":"https://doi.org/10.1109/MEPCON55441.2022.10021709","url":null,"abstract":"This paper investigates the effect of using transient recovery voltage (TRV)responsive VCB model in renewable energy systems of different transmission nature. The VCB model takes into account TRVreigniting operational feature. In this study, theVCB model is subjected to a diverse study for its use in renewable energy systems of different nature. At first, the VCB model is used to de-energized a series of wind turbines at an offshore wind farm connected to the onshore with a submarine cable. Then, the VCB is integrated at a hybrid microgrid powered by PV, wind turbines and hydro generation systems with a transmission system consisting only of overhead lines. A tool in the Alternating transient program (A$T$P/EM$T$P) software is represented using the Model language to simulate the VCB model. ATP/EMTP is used to simulate the tested systems. The results conclude that the represented VCB model is recommended for the switching studies as its sensible to TRV reigniting operational featurerenewable energy resources transmission systems","PeriodicalId":174878,"journal":{"name":"2022 23rd International Middle East Power Systems Conference (MEPCON)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126824295","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 : 2022-12-13DOI: 10.1109/MEPCON55441.2022.10021704
Mahmoud A. Badwey, N. Abbasy, G. Eldallal
Wireless power transfer (WPT) is a technique that permits the power to transfer wirelessly through time-changing magnetic or electric fields that represent a transfer media. WPT could be assorted into two main categories; capacitive power transfer (CPT) and inductive power transfer (IPT). Combining the inductive and the capacitive topologies has been resulted in a third topology known as hybrid wireless power transfer (HWPT). HWPT possesses the ability to transfer high amounts of power over large vertical gaps and over different horizontal misalignments with high efficiency. This paper extends the results of a 10 $mathbf{kW}$ HWPT system, newly developed by the same authors. The magnetic and the electric fields' distributions are both presented and studied. These results represent a key parameter in determining the safety exposure limit of both fields on the nearby humans. The obtained fields' values play an important role in selecting the proper shields to avoid fields' leakage to the surroundings. The $3mathrm{D}$ structure of the proposed model and the resultant fields are also simulated using Maxwell-3D simulation tool. The results of the proposed model prove an enhancement in the field distribution among the transmitter and the receiver with a minimum leakage to the surrounding as a result of using two different types of shields. Moreover, the system preserves its coupling fields for misalignment distances exceeding 500 mm in all directions. The developed HPWT system proves better performance under different misalignment conditions than the published IPT and the CPT systems separately
{"title":"Extended Results for a Developed 10 kW LC-Compensated Hybrid Wireless Power Transfer System","authors":"Mahmoud A. Badwey, N. Abbasy, G. Eldallal","doi":"10.1109/MEPCON55441.2022.10021704","DOIUrl":"https://doi.org/10.1109/MEPCON55441.2022.10021704","url":null,"abstract":"Wireless power transfer (WPT) is a technique that permits the power to transfer wirelessly through time-changing magnetic or electric fields that represent a transfer media. WPT could be assorted into two main categories; capacitive power transfer (CPT) and inductive power transfer (IPT). Combining the inductive and the capacitive topologies has been resulted in a third topology known as hybrid wireless power transfer (HWPT). HWPT possesses the ability to transfer high amounts of power over large vertical gaps and over different horizontal misalignments with high efficiency. This paper extends the results of a 10 $mathbf{kW}$ HWPT system, newly developed by the same authors. The magnetic and the electric fields' distributions are both presented and studied. These results represent a key parameter in determining the safety exposure limit of both fields on the nearby humans. The obtained fields' values play an important role in selecting the proper shields to avoid fields' leakage to the surroundings. The $3mathrm{D}$ structure of the proposed model and the resultant fields are also simulated using Maxwell-3D simulation tool. The results of the proposed model prove an enhancement in the field distribution among the transmitter and the receiver with a minimum leakage to the surrounding as a result of using two different types of shields. Moreover, the system preserves its coupling fields for misalignment distances exceeding 500 mm in all directions. The developed HPWT system proves better performance under different misalignment conditions than the published IPT and the CPT systems separately","PeriodicalId":174878,"journal":{"name":"2022 23rd International Middle East Power Systems Conference (MEPCON)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126946825","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 : 2022-12-13DOI: 10.1109/MEPCON55441.2022.10021810
Mahmoud M. Elgamasy, M. Izzularab, Xiao-Ping Zhang
A fast fault ride through (FRT) scheme is proposed for the offshore wind farms connected via modular-multilevel converter based high voltage DC transmission system (MMC-HVDC). The proposed scheme is adaptive by reducing the AC offshore voltage in accordance to the severity of the onshore fault condition. This helps keeping the power balance between the wind farm and the grid, and consequently the HVDC voltage level is kept within its nominal level over wide range of severity for the fault cases. With the proposed scheme, the speed of both detecting the fault and controlling the offshore voltage are enhanced. Although a communication system is needed for transferring data between onshore and offshore sides, the proposed scheme is discriminated by its fast and enhanced performance compared to the existing conventional schemes in literature. The proposed scheme is validated by the help of PSCAD simulation platform.
{"title":"Technical Treating and Riding-Through Symmetrical Grid Faults for MMC-HVDC Connected Offshore Wind Farms","authors":"Mahmoud M. Elgamasy, M. Izzularab, Xiao-Ping Zhang","doi":"10.1109/MEPCON55441.2022.10021810","DOIUrl":"https://doi.org/10.1109/MEPCON55441.2022.10021810","url":null,"abstract":"A fast fault ride through (FRT) scheme is proposed for the offshore wind farms connected via modular-multilevel converter based high voltage DC transmission system (MMC-HVDC). The proposed scheme is adaptive by reducing the AC offshore voltage in accordance to the severity of the onshore fault condition. This helps keeping the power balance between the wind farm and the grid, and consequently the HVDC voltage level is kept within its nominal level over wide range of severity for the fault cases. With the proposed scheme, the speed of both detecting the fault and controlling the offshore voltage are enhanced. Although a communication system is needed for transferring data between onshore and offshore sides, the proposed scheme is discriminated by its fast and enhanced performance compared to the existing conventional schemes in literature. The proposed scheme is validated by the help of PSCAD simulation platform.","PeriodicalId":174878,"journal":{"name":"2022 23rd International Middle East Power Systems Conference (MEPCON)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132534266","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 : 2022-12-13DOI: 10.1109/MEPCON55441.2022.10021717
Alaa M. Abdel-hamed, Mohamed M. El-Shafhy, E. Badran
The catastrophic failure of electrical network elements continues to be a major issue. The ferroresonance leads to a significant increase in voltage or/and current with harmonic presence, both of which represent a threat to the stability of the electrical network and its parts. The influence of ferroresonance on the distribution system is crucial because the distribution system is the network's closest part to the consumer, and any effect it has will have an impact on the customer. A case study of the ferroresonance problem is presented in this paper. The ferroresonance in power transformer and the effect of load variation on the transformer is presented. Results from the study verified that, it is advised to load transformers at a level more than 10% of their maximum capacity to avoid ferroresonance investigation. The investigation of ferroresonance in the radial distribution system and the impact of integrating Distributed Generation (DG) into the distribution zone on this phenomenon are presented. The study is simulated using the PSCAD/EMTDC software.
{"title":"Investigating Ferroresonance in the Distribution Zone","authors":"Alaa M. Abdel-hamed, Mohamed M. El-Shafhy, E. Badran","doi":"10.1109/MEPCON55441.2022.10021717","DOIUrl":"https://doi.org/10.1109/MEPCON55441.2022.10021717","url":null,"abstract":"The catastrophic failure of electrical network elements continues to be a major issue. The ferroresonance leads to a significant increase in voltage or/and current with harmonic presence, both of which represent a threat to the stability of the electrical network and its parts. The influence of ferroresonance on the distribution system is crucial because the distribution system is the network's closest part to the consumer, and any effect it has will have an impact on the customer. A case study of the ferroresonance problem is presented in this paper. The ferroresonance in power transformer and the effect of load variation on the transformer is presented. Results from the study verified that, it is advised to load transformers at a level more than 10% of their maximum capacity to avoid ferroresonance investigation. The investigation of ferroresonance in the radial distribution system and the impact of integrating Distributed Generation (DG) into the distribution zone on this phenomenon are presented. The study is simulated using the PSCAD/EMTDC software.","PeriodicalId":174878,"journal":{"name":"2022 23rd International Middle East Power Systems Conference (MEPCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132755267","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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