Pub Date : 2018-08-23DOI: 10.1109/EPECS.2018.8443502
B. Hayes, Kevin TomsovicIEEE
This paper investigates the potential for Conservation Voltage Reduction (CVR) in Low Voltage (LV) secondary distribution networks. CVR is a well-established technique where the voltage in LV networks is managed at a reduced, but still acceptable level in order to obtain energy savings. In this paper, a component-based load modelling approach is used to create time-varying models of residential loads designed to accurately represent the changes in electrical characteristics of LV customer loads over time. The proposed CVR approach is analysed in several scenarios with high penetrations of residential PV (Photovoltaic) units and Electric Vehicle (EV) charging loads in order to assess the impact of these technologies on CVR. Simulations are carried out using a detailed three-phase model of a typical European LV residential distribution network. The results quantify the CVR energy savings and the effects of CVR on LV network voltage quality. The sensitivity of the CVR results to the load model parameters is also analysed.
{"title":"Conservation Voltage Reduction in Secondary Distribution Networks with Distributed Generation and Electric Vehicle Charging Loads","authors":"B. Hayes, Kevin TomsovicIEEE","doi":"10.1109/EPECS.2018.8443502","DOIUrl":"https://doi.org/10.1109/EPECS.2018.8443502","url":null,"abstract":"This paper investigates the potential for Conservation Voltage Reduction (CVR) in Low Voltage (LV) secondary distribution networks. CVR is a well-established technique where the voltage in LV networks is managed at a reduced, but still acceptable level in order to obtain energy savings. In this paper, a component-based load modelling approach is used to create time-varying models of residential loads designed to accurately represent the changes in electrical characteristics of LV customer loads over time. The proposed CVR approach is analysed in several scenarios with high penetrations of residential PV (Photovoltaic) units and Electric Vehicle (EV) charging loads in order to assess the impact of these technologies on CVR. Simulations are carried out using a detailed three-phase model of a typical European LV residential distribution network. The results quantify the CVR energy savings and the effects of CVR on LV network voltage quality. The sensitivity of the CVR results to the load model parameters is also analysed.","PeriodicalId":389870,"journal":{"name":"2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117324949","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 : 2018-08-21DOI: 10.1109/EPECS.2018.8443492
Y. Huang, N. Tsai, Hsin-Lin Chiu, Yu-Chi Chen, C.-C. Jay Kuo
The proposed BOECMS (Bi-Object Equivalent Consumption Minimization Strategy) possesses three key features: being real-time, causal and capable of fulfilling two objects, namely, (i) minimized fuel consumption, and (ii) the battery SOC (State Of Charge) steadily retained within a relatively narrow range. A HEV (Hybrid Electric Vehicle) model and its corresponding power split strategy are developed and verified by using the vehicle simulator ADVISOR (ADvanced VehIcle SimulatOR) and Simulink at design stage. According to the computer simulation results, the degree of the improvement of fuel economy is up to 40.39 % in terms of “MANHATTAN” drive cycle in comparison to the conventional pure ICE (Internal Combustion Engine) vehicles. Moreover, the experimental results by HIL (Hardware-In-the-Loop) are pretty close to the computer simulations undertaken by Simulink. This implies that the proposed energy management strategy, BOECMS, can be potentially applied to the real-world driving in the future.
提出的BOECMS(双目标等效消耗最小化策略)具有三个关键特征:实时性，因果性，能够实现两个目标，即(i)最小化燃料消耗，(ii)电池SOC(充电状态)稳定保持在相对较窄的范围内。在设计阶段，利用ADVISOR (ADvanced Vehicle simulator)仿真软件和Simulink对混合动力汽车(HEV)模型和相应的功率分配策略进行了开发和验证。计算机仿真结果显示，在“MANHATTAN”循环工况下，与传统纯内燃机(ICE)车辆相比，燃油经济性提升程度高达40.39%。此外，HIL (hardware - in - loop)的实验结果与Simulink进行的计算机模拟非常接近。这意味着所提出的能源管理策略BOECMS可以潜在地应用于未来的现实驾驶。
{"title":"Bi-object Energy Consumption Minimization Strategy for HEVs","authors":"Y. Huang, N. Tsai, Hsin-Lin Chiu, Yu-Chi Chen, C.-C. Jay Kuo","doi":"10.1109/EPECS.2018.8443492","DOIUrl":"https://doi.org/10.1109/EPECS.2018.8443492","url":null,"abstract":"The proposed BOECMS (Bi-Object Equivalent Consumption Minimization Strategy) possesses three key features: being real-time, causal and capable of fulfilling two objects, namely, (i) minimized fuel consumption, and (ii) the battery SOC (State Of Charge) steadily retained within a relatively narrow range. A HEV (Hybrid Electric Vehicle) model and its corresponding power split strategy are developed and verified by using the vehicle simulator ADVISOR (ADvanced VehIcle SimulatOR) and Simulink at design stage. According to the computer simulation results, the degree of the improvement of fuel economy is up to 40.39 % in terms of “MANHATTAN” drive cycle in comparison to the conventional pure ICE (Internal Combustion Engine) vehicles. Moreover, the experimental results by HIL (Hardware-In-the-Loop) are pretty close to the computer simulations undertaken by Simulink. This implies that the proposed energy management strategy, BOECMS, can be potentially applied to the real-world driving in the future.","PeriodicalId":389870,"journal":{"name":"2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126636075","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 : 2018-04-23DOI: 10.1109/EPECS.2018.8443491
H. Javed, Kang Li, Guoqiang Zhang, A. Plesca
Creepage discharge faults in air on solid insulating material play a vital role in degradation and ageing of material which ultimately leads to breakdown of power system equipment. And electric discharge decompose air in to its byproducts such as Ozone and NOx gases. By analyzing air decomposition gases is a potential method for fault diagnostic in air. In this paper, experimental research has been conducted to study the effect of creepage discharge on rate of generation of air decomposition by-products using different insulating materials such as RTV, epoxy and fiberglass laminated sheet. Moreover XRF analysis has been done to analyze creepage discharge effect on these insulating materials. All experiments have been done in an open air test cell under constant temperature and pressure conditions. While analysis has been made for low and high humidity conditions. The results show that the overall concentration of air decomposition byproducts under creepage discharge in low humidity is 4% higher than concentration measured in high humidity. Based on this study a mathematical relationship is also proposed for the rate of generation of air decomposition by-products under creepage discharge fault. This study leads to indirect way for diagnostic of creepage discharge propagation in air.
{"title":"Experimental Study on Air Decomposition By-Product Under Creepage Discharge Fault and Their Impact on Insulating Materials","authors":"H. Javed, Kang Li, Guoqiang Zhang, A. Plesca","doi":"10.1109/EPECS.2018.8443491","DOIUrl":"https://doi.org/10.1109/EPECS.2018.8443491","url":null,"abstract":"Creepage discharge faults in air on solid insulating material play a vital role in degradation and ageing of material which ultimately leads to breakdown of power system equipment. And electric discharge decompose air in to its byproducts such as Ozone and NOx gases. By analyzing air decomposition gases is a potential method for fault diagnostic in air. In this paper, experimental research has been conducted to study the effect of creepage discharge on rate of generation of air decomposition by-products using different insulating materials such as RTV, epoxy and fiberglass laminated sheet. Moreover XRF analysis has been done to analyze creepage discharge effect on these insulating materials. All experiments have been done in an open air test cell under constant temperature and pressure conditions. While analysis has been made for low and high humidity conditions. The results show that the overall concentration of air decomposition byproducts under creepage discharge in low humidity is 4% higher than concentration measured in high humidity. Based on this study a mathematical relationship is also proposed for the rate of generation of air decomposition by-products under creepage discharge fault. This study leads to indirect way for diagnostic of creepage discharge propagation in air.","PeriodicalId":389870,"journal":{"name":"2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128282660","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 : 2018-04-23DOI: 10.1109/EPECS.2018.8443539
W. Dai, Juan Yu, Wenyuan Li
Electricity and natural gas networks are owned by different utilities with multiple decision-makers in many countries. Apparently, the centralized energy flow optimization is only suitable for a single decision-maker. This paper presents an equivalent optimal power flow method for electricity and natural gas networks with multiple decision-makers. This method proposes a constraint equivalent model for the natural gas network considering the limits of gas sources, nodal gas pressures, and compressor pressure ratios. Based on the constraint equivalent model, the equivalent optimal power flow method can be constructed further. This method can retain the impacts of natural gas network constraints on the electricity network and ensure the security of the electricity network. The effectiveness of the proposed method is demonstrated with a set of test results on an electricity and natural gas coupled system composed of the IEEE 14-bus system and a 10-node gas network.
{"title":"Equivalent Optimal Power Flow Method Considering Natural Gas Network Constraints","authors":"W. Dai, Juan Yu, Wenyuan Li","doi":"10.1109/EPECS.2018.8443539","DOIUrl":"https://doi.org/10.1109/EPECS.2018.8443539","url":null,"abstract":"Electricity and natural gas networks are owned by different utilities with multiple decision-makers in many countries. Apparently, the centralized energy flow optimization is only suitable for a single decision-maker. This paper presents an equivalent optimal power flow method for electricity and natural gas networks with multiple decision-makers. This method proposes a constraint equivalent model for the natural gas network considering the limits of gas sources, nodal gas pressures, and compressor pressure ratios. Based on the constraint equivalent model, the equivalent optimal power flow method can be constructed further. This method can retain the impacts of natural gas network constraints on the electricity network and ensure the security of the electricity network. The effectiveness of the proposed method is demonstrated with a set of test results on an electricity and natural gas coupled system composed of the IEEE 14-bus system and a 10-node gas network.","PeriodicalId":389870,"journal":{"name":"2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132347319","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 : 2018-04-23DOI: 10.1109/EPECS.2018.8443359
A. S. Zalhaf, Mahmoud A. Ahmed, S. Ookawara, M. Abdel-Salam
In this paper, the transient behaviour of a WT during lightning stroke is determined considering the high frequency nature of the lightning impulse current through its flow from WT blades to the grounding system. Following the IEC Standard, type-B arrangement is the recommended one for WT grounding which is composed of a horizontal ring supported with horizontal electrodes and vertical rods. The ring is divided into series of linear horizontal conductors. Each horizontal conductor, horizontal electrode and vertical rod is modelled by its π -equivalent RLC circuit. Furthermore, the WT blade is modelled by π -equivalent RLC network. The tower model is simplified by splitting it into vertical cylinders; each cylinder is represented by π -equivalent RLC circuit. The nodal equations of the grounding system and the WT are written at each discrete time instant. MATLAB software package is used to solve the nodal equations and determine the transient response of WT. The results are compared with the case of turbine grounding through a pure resistance as adopted in the literature. The simulation results are then validated by using PSCAD/EMTDC software package.
{"title":"A Simplified Model of Wind Turbine for Lightning Transient Analysis as Influenced by Structure of Grounding System","authors":"A. S. Zalhaf, Mahmoud A. Ahmed, S. Ookawara, M. Abdel-Salam","doi":"10.1109/EPECS.2018.8443359","DOIUrl":"https://doi.org/10.1109/EPECS.2018.8443359","url":null,"abstract":"In this paper, the transient behaviour of a WT during lightning stroke is determined considering the high frequency nature of the lightning impulse current through its flow from WT blades to the grounding system. Following the IEC Standard, type-B arrangement is the recommended one for WT grounding which is composed of a horizontal ring supported with horizontal electrodes and vertical rods. The ring is divided into series of linear horizontal conductors. Each horizontal conductor, horizontal electrode and vertical rod is modelled by its π -equivalent RLC circuit. Furthermore, the WT blade is modelled by π -equivalent RLC network. The tower model is simplified by splitting it into vertical cylinders; each cylinder is represented by π -equivalent RLC circuit. The nodal equations of the grounding system and the WT are written at each discrete time instant. MATLAB software package is used to solve the nodal equations and determine the transient response of WT. The results are compared with the case of turbine grounding through a pure resistance as adopted in the literature. The simulation results are then validated by using PSCAD/EMTDC software package.","PeriodicalId":389870,"journal":{"name":"2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130682562","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 : 2018-04-23DOI: 10.1109/EPECS.2018.8443361
J. Hartono, N. Hariyanto, F. S. Rahman, T. Kerdphol, Masayuki Watanabe, Y. Mitani
The main purpose of this paper is to propose an approach of the PSS (Power System Stabilizer) parameter tuning for interconnection system between Kalimantan Selatan - Tengah (Kalselteng) and Kalimantan Timur (Kaltim) in Indonesia. At this time, PSS module that exists on the generators in both of the subsystems have not been activated yet. This paper is expected to be a reference to determine the location and to tune the PSS parameter values for the other electrical power system in Indonesia. The location of PSS is determined by participation factor using DIgSILENT PowerFactory ® software, then the tuning is processed using Particle Swarm Optimization (PSO) method by MATLAB ®. After getting the tuned PSS parameter values, the response of the system towards the short-circuit simulation is compared with typical values of PSS parameter [7] as the validation process.
{"title":"Power System Stabilizer Tuning to Enhance Kalimantan Selatan - Tengah and Kalimantan Timur System Interconnection Stability Using Particle Swarm Optimization","authors":"J. Hartono, N. Hariyanto, F. S. Rahman, T. Kerdphol, Masayuki Watanabe, Y. Mitani","doi":"10.1109/EPECS.2018.8443361","DOIUrl":"https://doi.org/10.1109/EPECS.2018.8443361","url":null,"abstract":"The main purpose of this paper is to propose an approach of the PSS (Power System Stabilizer) parameter tuning for interconnection system between Kalimantan Selatan - Tengah (Kalselteng) and Kalimantan Timur (Kaltim) in Indonesia. At this time, PSS module that exists on the generators in both of the subsystems have not been activated yet. This paper is expected to be a reference to determine the location and to tune the PSS parameter values for the other electrical power system in Indonesia. The location of PSS is determined by participation factor using DIgSILENT PowerFactory ® software, then the tuning is processed using Particle Swarm Optimization (PSO) method by MATLAB ®. After getting the tuned PSS parameter values, the response of the system towards the short-circuit simulation is compared with typical values of PSS parameter [7] as the validation process.","PeriodicalId":389870,"journal":{"name":"2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)","volume":"391 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133189267","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 : 2018-04-23DOI: 10.1109/EPECS.2018.8443551
M. Rezk, O. Saqib, O. Damati, M. Attie, A. Osman, M. Shaaban, M. Hassan
This paper proposes a new centralized energy management system (EMS) architecture for islanded microgrids (MG). The proposed EMS is composed of five main units: the master, the data handling, the optimization, the time handling, and the system state units. The master unit is employed as the EMS operator that is responsible for managing the operation of all other units in the EMS system. Data handling unit performs the data exchange, preprocessing and storage. The optimization unit develops the optimal decisions required for successful operation of the MG. The time handling unit forecasts the future demand and generation in addition to managing the time intervals of decisions. The system state unit detects the system topology and estimates the system state. The proposed EMS optimizes the operation of the system and minimizes the overall cost of power generation while providing the consumers with secure, reliable and clean electricity.
{"title":"A Proposed Energy Management System Architecture for Islanded Microgrids","authors":"M. Rezk, O. Saqib, O. Damati, M. Attie, A. Osman, M. Shaaban, M. Hassan","doi":"10.1109/EPECS.2018.8443551","DOIUrl":"https://doi.org/10.1109/EPECS.2018.8443551","url":null,"abstract":"This paper proposes a new centralized energy management system (EMS) architecture for islanded microgrids (MG). The proposed EMS is composed of five main units: the master, the data handling, the optimization, the time handling, and the system state units. The master unit is employed as the EMS operator that is responsible for managing the operation of all other units in the EMS system. Data handling unit performs the data exchange, preprocessing and storage. The optimization unit develops the optimal decisions required for successful operation of the MG. The time handling unit forecasts the future demand and generation in addition to managing the time intervals of decisions. The system state unit detects the system topology and estimates the system state. The proposed EMS optimizes the operation of the system and minimizes the overall cost of power generation while providing the consumers with secure, reliable and clean electricity.","PeriodicalId":389870,"journal":{"name":"2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131018081","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 : 2018-04-23DOI: 10.1109/EPECS.2018.8443566
Yunqi Wang, Yiqing Kong, J. Ravishankar, T. Phung, Phu Ngoc Le
New challenges are presented for reliable operation of the power system due to increasing penetration of distributed generations (DGs). The low inertia of the generator and their power electronics interface decoupled from the grid makes it much more difficult to maintain system stability, especially for islanded micro-grids. To ensure the power quality and system reliability, the accurate and effective detection of transient signals is required. This paper utilizes wavelet transformation to detect and classify the transient signals in islanded micro-grids. The results show that the disturbances are successfully identified by applying wavelet transform in both simulation and experimental conditions. The classification of disturbances was also investigated. Coefficient spectrums and histograms are plotted to identify different disturbances in the micro-grid.
{"title":"ANALYSIS AND DETECTION OF TRANSIENTS IN ISLANDED MICRO-GRIDS USING WAVELET TRANSFORMATION","authors":"Yunqi Wang, Yiqing Kong, J. Ravishankar, T. Phung, Phu Ngoc Le","doi":"10.1109/EPECS.2018.8443566","DOIUrl":"https://doi.org/10.1109/EPECS.2018.8443566","url":null,"abstract":"New challenges are presented for reliable operation of the power system due to increasing penetration of distributed generations (DGs). The low inertia of the generator and their power electronics interface decoupled from the grid makes it much more difficult to maintain system stability, especially for islanded micro-grids. To ensure the power quality and system reliability, the accurate and effective detection of transient signals is required. This paper utilizes wavelet transformation to detect and classify the transient signals in islanded micro-grids. The results show that the disturbances are successfully identified by applying wavelet transform in both simulation and experimental conditions. The classification of disturbances was also investigated. Coefficient spectrums and histograms are plotted to identify different disturbances in the micro-grid.","PeriodicalId":389870,"journal":{"name":"2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121167288","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 : 2018-04-23DOI: 10.1109/EPECS.2018.8443516
S. Romphochai, K. Hongesombut
With an increasing of the Doubly-Fed Induction Generator (DFIG) based wind turbine implementations, hence, this paper presents an effect of low voltage ride-through capability of the DFIG wind turbines for transient stability of Small Power Producer (SPP). The DFIG, without the low voltage ride-through capability, can be disconnected from a power grid because of a protection scheme of the DFIG. Therefore, the DFIG tripping can perturb the transient stability of the power system, especially in the SPP applications. To enhance the low voltage ride-through capability of the DFIG wind turbines, Superconducting Fault Current Limiter (SFCL) using High Temperature Superconductor (HTS) is fully implemented in this paper. As the simulated results without the capability to ride through the fault, the effect of the DFIG is completely demonstrated that the DFIGs can perturb the transient stability of the SPP. For solving this problem utilizing the SFCL, the DFIG allows riding through the fault under the Swedish grid code requirement, improving the transient stability of SPP.
{"title":"Effect of Low Voltage Ride-Through Capability of Doubly-Fed Induction Generator Wind Turbines for Transient Stability of Small Power Producer","authors":"S. Romphochai, K. Hongesombut","doi":"10.1109/EPECS.2018.8443516","DOIUrl":"https://doi.org/10.1109/EPECS.2018.8443516","url":null,"abstract":"With an increasing of the Doubly-Fed Induction Generator (DFIG) based wind turbine implementations, hence, this paper presents an effect of low voltage ride-through capability of the DFIG wind turbines for transient stability of Small Power Producer (SPP). The DFIG, without the low voltage ride-through capability, can be disconnected from a power grid because of a protection scheme of the DFIG. Therefore, the DFIG tripping can perturb the transient stability of the power system, especially in the SPP applications. To enhance the low voltage ride-through capability of the DFIG wind turbines, Superconducting Fault Current Limiter (SFCL) using High Temperature Superconductor (HTS) is fully implemented in this paper. As the simulated results without the capability to ride through the fault, the effect of the DFIG is completely demonstrated that the DFIGs can perturb the transient stability of the SPP. For solving this problem utilizing the SFCL, the DFIG allows riding through the fault under the Swedish grid code requirement, improving the transient stability of SPP.","PeriodicalId":389870,"journal":{"name":"2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115364547","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 : 2018-04-23DOI: 10.1109/EPECS.2018.8443544
A. Elserougi, A. Massoud, Shehab Ahmed
Conventional Modular Multilevel Converter (MMC) is a promising candidate in high-voltage high-power applications. Unfortunately, operating the conventional MMC with DC output voltage results in unbalanced capacitors' voltages. In literature, Dual Half Bridge (DHB)-based Energy Equalization Modules (EEMs) concept was presented; where EEMs can be employed with phase shift control to transfer energy between the upper and lower submodules (SMs) in the same leg to keep balanced capacitors voltages with low ripples during the DC/low frequency operation of the conventional MMC. In this paper, an H-bridge Modular DC-DC converter with flyback-based EEMs is presented. The bidirectional flyback-based EEMs provide the needed energy equalization task simply by operating the flyback converter with 50% duty cycle; which is simpler when compared with the DHB-based EEMs. Detailed illustration of the proposed architecture is presented. Simulation results are presented to show the effectiveness of the bidirectional flyback-based EEMs.
{"title":"An H-Bridge Modular DC-DC Converter with Bidirectional Flyback-Based Energy Equalization Modules","authors":"A. Elserougi, A. Massoud, Shehab Ahmed","doi":"10.1109/EPECS.2018.8443544","DOIUrl":"https://doi.org/10.1109/EPECS.2018.8443544","url":null,"abstract":"Conventional Modular Multilevel Converter (MMC) is a promising candidate in high-voltage high-power applications. Unfortunately, operating the conventional MMC with DC output voltage results in unbalanced capacitors' voltages. In literature, Dual Half Bridge (DHB)-based Energy Equalization Modules (EEMs) concept was presented; where EEMs can be employed with phase shift control to transfer energy between the upper and lower submodules (SMs) in the same leg to keep balanced capacitors voltages with low ripples during the DC/low frequency operation of the conventional MMC. In this paper, an H-bridge Modular DC-DC converter with flyback-based EEMs is presented. The bidirectional flyback-based EEMs provide the needed energy equalization task simply by operating the flyback converter with 50% duty cycle; which is simpler when compared with the DHB-based EEMs. Detailed illustration of the proposed architecture is presented. Simulation results are presented to show the effectiveness of the bidirectional flyback-based EEMs.","PeriodicalId":389870,"journal":{"name":"2018 5th International Conference on Electric Power and Energy Conversion Systems (EPECS)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132464097","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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