Pub Date : 2016-04-02DOI: 10.1109/ICREDG.2016.7875916
Hossein Shahinzadeh, A. Gheiratmand, Jalal Moradi, S. Fathi
Renewable energy has recently significant incremental upward trend. In spite of such considerable growth in utilization of these kinds of energies, it has some downsides too. Renewable energies, such as wind and solar energy, have normally uncertainty, which confront operation of power system with some difficulties and complexities. Moreover, power system operation scheduling must be performed more exact as possible to diminish costs of system and protect it from losing any type of stability. In addition, in restructured power systems, the units having uncertainty have high risk of participation in wholesale power market because if they cannot be able to provide undertaken demand, they must be penalized by market operator. This curtailment also increases spot market clearing price (MCP) and total operation cost of system, and decrease profit of uncertain units. Therefore, use of large scale electrical energy storage units such as pumped-storage (PS), compressed air energy storage (CAES) and ocean renewable energy storage units (ORES) is inevitable in order to compensate imbalances performed by uncertainty. These types of storages can be constructed in a certain topological place, which must have specific geographical characteristics. In near-to-sea places, construction of PS and CAES units are predominantly impossible. Nevertheless, there are usually high potential of on-shore and off-shore wind energy extraction. Hence, coordination of ORES units and wind farms has some advantages, which are investigated in a 10-unit test system considering all operation constraints.
{"title":"Simultaneous operation of near-to-sea and off-shore wind farms with ocean renewable energy storage","authors":"Hossein Shahinzadeh, A. Gheiratmand, Jalal Moradi, S. Fathi","doi":"10.1109/ICREDG.2016.7875916","DOIUrl":"https://doi.org/10.1109/ICREDG.2016.7875916","url":null,"abstract":"Renewable energy has recently significant incremental upward trend. In spite of such considerable growth in utilization of these kinds of energies, it has some downsides too. Renewable energies, such as wind and solar energy, have normally uncertainty, which confront operation of power system with some difficulties and complexities. Moreover, power system operation scheduling must be performed more exact as possible to diminish costs of system and protect it from losing any type of stability. In addition, in restructured power systems, the units having uncertainty have high risk of participation in wholesale power market because if they cannot be able to provide undertaken demand, they must be penalized by market operator. This curtailment also increases spot market clearing price (MCP) and total operation cost of system, and decrease profit of uncertain units. Therefore, use of large scale electrical energy storage units such as pumped-storage (PS), compressed air energy storage (CAES) and ocean renewable energy storage units (ORES) is inevitable in order to compensate imbalances performed by uncertainty. These types of storages can be constructed in a certain topological place, which must have specific geographical characteristics. In near-to-sea places, construction of PS and CAES units are predominantly impossible. Nevertheless, there are usually high potential of on-shore and off-shore wind energy extraction. Hence, coordination of ORES units and wind farms has some advantages, which are investigated in a 10-unit test system considering all operation constraints.","PeriodicalId":207212,"journal":{"name":"2016 Iranian Conference on Renewable Energy & Distributed Generation (ICREDG)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126594403","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 : 2016-04-02DOI: 10.1109/ICREDG.2016.7875897
R. Ghanizadeh, M. Ebadian, G. Gharehpetian
If sensitive loads are connected to point of common connection (PCC), compensation should be carried out in order to reduce PCC voltage harmonics. In this case, compensation is performed by the interface converters of distributed generation (DG) units. In this paper, a novel method is proposed for voltage harmonics compensation in islanded microgrids. Also, to decrease the asymmetry among phase impedances of microgrid, a novel structure is proposed to generate virtual impedance. At fundamental frequency, the proposed structure for the virtual impedance improves the control of the fundamental component of the power, and at harmonic frequencies, it acts to adaptively improve nonlinear load sharing among DG units. In the structures of the proposed harmonic compensator and the proposed virtual impedance, a self-tuning filter (STF) is used for separating the fundamental component from the harmonic components. This STF decreases the number of the phase locked loop (PLL). The Simulation results in MATLAB/SIMULINK environment show the efficiency of the proposed approach in improving load sharing and decreasing voltage harmonics.
{"title":"A new control method for voltage harmonics compensation in islanded microgrid","authors":"R. Ghanizadeh, M. Ebadian, G. Gharehpetian","doi":"10.1109/ICREDG.2016.7875897","DOIUrl":"https://doi.org/10.1109/ICREDG.2016.7875897","url":null,"abstract":"If sensitive loads are connected to point of common connection (PCC), compensation should be carried out in order to reduce PCC voltage harmonics. In this case, compensation is performed by the interface converters of distributed generation (DG) units. In this paper, a novel method is proposed for voltage harmonics compensation in islanded microgrids. Also, to decrease the asymmetry among phase impedances of microgrid, a novel structure is proposed to generate virtual impedance. At fundamental frequency, the proposed structure for the virtual impedance improves the control of the fundamental component of the power, and at harmonic frequencies, it acts to adaptively improve nonlinear load sharing among DG units. In the structures of the proposed harmonic compensator and the proposed virtual impedance, a self-tuning filter (STF) is used for separating the fundamental component from the harmonic components. This STF decreases the number of the phase locked loop (PLL). The Simulation results in MATLAB/SIMULINK environment show the efficiency of the proposed approach in improving load sharing and decreasing voltage harmonics.","PeriodicalId":207212,"journal":{"name":"2016 Iranian Conference on Renewable Energy & Distributed Generation (ICREDG)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116672500","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 : 2016-04-02DOI: 10.1109/ICREDG.2016.7875913
H. Afrakhte, P. Bayat, P. Bayat
Despite all the advantages presented by the generation of energy through photovoltaic (PV) cells, the efficiency of energy conversion is currently low, and the initial cost for its implementation is still considered high; thus, it becomes necessary to use techniques to extract the maximum power from these panels, in order to achieve maximum efficiency in operation. In this paper, in order to evaluate the effects of maximum power point tracking (MPPT) techniques on the reliability of grid-connected PV systems, different MPPT techniques employed in PV systems are discussed according to a classification scheme as offline methods, online methods, and hybrid methods. The recursive least squares (RLS) identification algorithm uses to identify local PV system model parameters under different MPPT method. For proper separation of each MPPT method, variation of irradiation is considered as variation of set point. The simulation result shows that, there is direct relations between MPPT methods and overall reliability of the PV system. For this purpose, simulations were made in MATLAB/SIMULINK environment.
{"title":"Evaluating the effects of maximum power point tracking techniques on the reliability of grid-connected photovoltaic systems","authors":"H. Afrakhte, P. Bayat, P. Bayat","doi":"10.1109/ICREDG.2016.7875913","DOIUrl":"https://doi.org/10.1109/ICREDG.2016.7875913","url":null,"abstract":"Despite all the advantages presented by the generation of energy through photovoltaic (PV) cells, the efficiency of energy conversion is currently low, and the initial cost for its implementation is still considered high; thus, it becomes necessary to use techniques to extract the maximum power from these panels, in order to achieve maximum efficiency in operation. In this paper, in order to evaluate the effects of maximum power point tracking (MPPT) techniques on the reliability of grid-connected PV systems, different MPPT techniques employed in PV systems are discussed according to a classification scheme as offline methods, online methods, and hybrid methods. The recursive least squares (RLS) identification algorithm uses to identify local PV system model parameters under different MPPT method. For proper separation of each MPPT method, variation of irradiation is considered as variation of set point. The simulation result shows that, there is direct relations between MPPT methods and overall reliability of the PV system. For this purpose, simulations were made in MATLAB/SIMULINK environment.","PeriodicalId":207212,"journal":{"name":"2016 Iranian Conference on Renewable Energy & Distributed Generation (ICREDG)","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115978965","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 : 2016-04-02DOI: 10.1109/ICREDG.2016.7875895
M. Ayaz, E. Farjah, T. Ghanbari
Recently, Wireless Sensor Networks (WSNs) have been widespread utilized in automation. The power supply of WSNs has significant influences on their performance. This paper presents a novel power management circuit for WSNs. The proposed circuit provides an interminable energy source for wireless sensor nodes through environmental energy harvesting. The energy harvester is comprised of a thermoelectric generator and an autonomous step-up DC-DC converter. The proposed converter has two stages: the first is an amended oscillator which provides an AC voltage for the second stage and the second stage is an AC-DC voltage multiplier. The proposed converter is simulated and also fabricated. Simulation and experimental results show that this converter has a relatively high step-up ratio at low input voltages, 11.6 for a 0.5V input voltage. Furthermore, its best efficiency is as high as 70% while delivering ultralow powers as low as 66μW to a wireless sensor node.
{"title":"An efficient power supply for Wireless Sensor Networks through environmental energy harvesting","authors":"M. Ayaz, E. Farjah, T. Ghanbari","doi":"10.1109/ICREDG.2016.7875895","DOIUrl":"https://doi.org/10.1109/ICREDG.2016.7875895","url":null,"abstract":"Recently, Wireless Sensor Networks (WSNs) have been widespread utilized in automation. The power supply of WSNs has significant influences on their performance. This paper presents a novel power management circuit for WSNs. The proposed circuit provides an interminable energy source for wireless sensor nodes through environmental energy harvesting. The energy harvester is comprised of a thermoelectric generator and an autonomous step-up DC-DC converter. The proposed converter has two stages: the first is an amended oscillator which provides an AC voltage for the second stage and the second stage is an AC-DC voltage multiplier. The proposed converter is simulated and also fabricated. Simulation and experimental results show that this converter has a relatively high step-up ratio at low input voltages, 11.6 for a 0.5V input voltage. Furthermore, its best efficiency is as high as 70% while delivering ultralow powers as low as 66μW to a wireless sensor node.","PeriodicalId":207212,"journal":{"name":"2016 Iranian Conference on Renewable Energy & Distributed Generation (ICREDG)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133547110","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 : 2016-04-02DOI: 10.1109/ICREDG.2016.7875909
Morteza Shabanzadeh, M. Sheikh‐El‐Eslami, M. Haghifam
This paper provides a well thought view of the virtual power plant (VPP) concept from the cross-regional cooperation of neighboring VPPs to its potential trading benefits. For a smart power system, it is recognized that multiple VPPs can exist in a system, hence from an individual VPP' viewpoint, the cooperation with all physically-connected neighboring VPPs would be a golden opportunity for managing the risk of profit variability as well as achieving high profits. To this end, a decision making framework for medium-term self-scheduling of an individual VPP with the aim of exercising arbitrage between two different trading floors, bilateral contracts and the pool, is proposed. Moreover, an efficient risk management approach based on the concept of second-order stochastic dominance constraints (SOSDCs) is used to enable informed decision making under different levels of uncertainty. This method is clearly discussed in an easy to follow way. Finally, the efficiency of the proposed model is analyzed through a detailed case study, and thereby relevant conclusions are drawn.
{"title":"Modeling the cooperation between neighboring VPPs: Cross-regional bilateral transactions","authors":"Morteza Shabanzadeh, M. Sheikh‐El‐Eslami, M. Haghifam","doi":"10.1109/ICREDG.2016.7875909","DOIUrl":"https://doi.org/10.1109/ICREDG.2016.7875909","url":null,"abstract":"This paper provides a well thought view of the virtual power plant (VPP) concept from the cross-regional cooperation of neighboring VPPs to its potential trading benefits. For a smart power system, it is recognized that multiple VPPs can exist in a system, hence from an individual VPP' viewpoint, the cooperation with all physically-connected neighboring VPPs would be a golden opportunity for managing the risk of profit variability as well as achieving high profits. To this end, a decision making framework for medium-term self-scheduling of an individual VPP with the aim of exercising arbitrage between two different trading floors, bilateral contracts and the pool, is proposed. Moreover, an efficient risk management approach based on the concept of second-order stochastic dominance constraints (SOSDCs) is used to enable informed decision making under different levels of uncertainty. This method is clearly discussed in an easy to follow way. Finally, the efficiency of the proposed model is analyzed through a detailed case study, and thereby relevant conclusions are drawn.","PeriodicalId":207212,"journal":{"name":"2016 Iranian Conference on Renewable Energy & Distributed Generation (ICREDG)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127693907","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 : 2016-04-02DOI: 10.1109/ICREDG.2016.7875899
M. Eydi, Javad Farhang, Reza Emamalipour, B. Asaei
Today, with an increase in the share of power produced by the distributed generation especially the wind and solar sources, the standards for connecting these sources to the grid have been updated. According to these standards, the distributed generation sources must stay connected to the grid during fault conditions and must help the grid to come back to normal conditions. In this paper, a method is proposed for controlling the 3-phase 2-stage solar converter during fault conditions. In this method, it has been tried to take into consideration and meet 4 main challenges in controlling the distributed generation sources when a fault occurs. These challenges include: 1) The quality of the injected power into the grid. 2) Control of the current of all phases within their allowed ranges for both balanced and unbalanced faults. 3) Meeting the grid requirements during fault. 4) Using the inverter's maximum capacity to support the grid at the times of fault. The functionality of the proposed method is investigated in MATLAB software and Simulink environment.
{"title":"Low voltage ride-through of a two-stage photovoltaic inverter under different types of grid faults","authors":"M. Eydi, Javad Farhang, Reza Emamalipour, B. Asaei","doi":"10.1109/ICREDG.2016.7875899","DOIUrl":"https://doi.org/10.1109/ICREDG.2016.7875899","url":null,"abstract":"Today, with an increase in the share of power produced by the distributed generation especially the wind and solar sources, the standards for connecting these sources to the grid have been updated. According to these standards, the distributed generation sources must stay connected to the grid during fault conditions and must help the grid to come back to normal conditions. In this paper, a method is proposed for controlling the 3-phase 2-stage solar converter during fault conditions. In this method, it has been tried to take into consideration and meet 4 main challenges in controlling the distributed generation sources when a fault occurs. These challenges include: 1) The quality of the injected power into the grid. 2) Control of the current of all phases within their allowed ranges for both balanced and unbalanced faults. 3) Meeting the grid requirements during fault. 4) Using the inverter's maximum capacity to support the grid at the times of fault. The functionality of the proposed method is investigated in MATLAB software and Simulink environment.","PeriodicalId":207212,"journal":{"name":"2016 Iranian Conference on Renewable Energy & Distributed Generation (ICREDG)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130757116","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 : 2016-04-02DOI: 10.1109/ICREDG.2016.7875896
A. Jabbari
In this paper, design optimization and fabrication of a prototype permanent magnet brushless generator for a direct drive wind turbine has been considered. The main challenge in design of a low speed permanent magnet brushless generator is pulsating torque phenomenon due to cogging torque and electromagnetic torque ripple which can led to noise and vibration. In order to reduce pulsating torque components, the effect of skew and dummy slots has been investigated using FEM analysis. Analytical results show that pulsating torque will be reduced considerably by using these two methods simultaneously. A prototype has been fabricated based on optimum FEM result. Experimental results show the effectiveness of the proposed method in comparison of skew or dummy slots separately.
{"title":"Design optimization of a permanent magnet brushless generator for a gearless wind turbine","authors":"A. Jabbari","doi":"10.1109/ICREDG.2016.7875896","DOIUrl":"https://doi.org/10.1109/ICREDG.2016.7875896","url":null,"abstract":"In this paper, design optimization and fabrication of a prototype permanent magnet brushless generator for a direct drive wind turbine has been considered. The main challenge in design of a low speed permanent magnet brushless generator is pulsating torque phenomenon due to cogging torque and electromagnetic torque ripple which can led to noise and vibration. In order to reduce pulsating torque components, the effect of skew and dummy slots has been investigated using FEM analysis. Analytical results show that pulsating torque will be reduced considerably by using these two methods simultaneously. A prototype has been fabricated based on optimum FEM result. Experimental results show the effectiveness of the proposed method in comparison of skew or dummy slots separately.","PeriodicalId":207212,"journal":{"name":"2016 Iranian Conference on Renewable Energy & Distributed Generation (ICREDG)","volume":"231 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115501533","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 : 2016-04-02DOI: 10.1109/ICREDG.2016.7875914
H. Afrakhte, P. Bayat, P. Bayat
A smart house, is a home that incorporates advanced automation systems to provide the inhabitants with sophisticated monitoring and control over the building's functions. Solar and wind energy and hybrid electric vehicles (HEVs) commonly used in smart houses. Renewable electrical energy sources such as solar power and wind energy are becoming increasingly important owing to the limited fossil fuels resources and their negative environmental impact, on the other hand HEVs are becoming promising alternatives to be remedy for urban air pollution, greenhouse gases and depletion of the finite fossil fuel resources as they use centrally generated electricity as a power source. In smart houses, the important thing is energy management between input sources, so this paper proposes the multi-sources energy configuration and novel controller by combining the proportional integral (PI) and cultural algorithm (CA) based feedback control of an energy management system (EMS) for multi sources smart house. The purpose of the EMS is delivered a smooth line voltage to the power grid.
{"title":"Energy management system for smart house with multi-sources using PI-CA controller","authors":"H. Afrakhte, P. Bayat, P. Bayat","doi":"10.1109/ICREDG.2016.7875914","DOIUrl":"https://doi.org/10.1109/ICREDG.2016.7875914","url":null,"abstract":"A smart house, is a home that incorporates advanced automation systems to provide the inhabitants with sophisticated monitoring and control over the building's functions. Solar and wind energy and hybrid electric vehicles (HEVs) commonly used in smart houses. Renewable electrical energy sources such as solar power and wind energy are becoming increasingly important owing to the limited fossil fuels resources and their negative environmental impact, on the other hand HEVs are becoming promising alternatives to be remedy for urban air pollution, greenhouse gases and depletion of the finite fossil fuel resources as they use centrally generated electricity as a power source. In smart houses, the important thing is energy management between input sources, so this paper proposes the multi-sources energy configuration and novel controller by combining the proportional integral (PI) and cultural algorithm (CA) based feedback control of an energy management system (EMS) for multi sources smart house. The purpose of the EMS is delivered a smooth line voltage to the power grid.","PeriodicalId":207212,"journal":{"name":"2016 Iranian Conference on Renewable Energy & Distributed Generation (ICREDG)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114085040","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 : 2016-04-02DOI: 10.1109/ICREDG.2016.7875917
Davood Keshavarzi, E. Farjah, Teymoor Ghanbarih
In this paper, a hybrid DC circuit breaker based on natural Zero Current Switching for DC microgrid is proposed. In the DC networks, arc quenching is a dramatic challenge due to lack of zero crossing of current, which results in corrosion and reduction of circuit breaker lifetime. The hybrid circuit breaker conducts the current using a mechanical switch in normal condition. In fault condition, counter current of a discharging capacitor makes mechanical switch to experience zero crossing condition. Therefore, the arc can be quenched safely. Also, the fault current with relatively higher impedance can be interrupted using zero voltage switching. The proposed breaker structure is described and its performance is evaluated using different simulations.
{"title":"A hybrid DC circuit breaker for DC microgrid based on zero current switching","authors":"Davood Keshavarzi, E. Farjah, Teymoor Ghanbarih","doi":"10.1109/ICREDG.2016.7875917","DOIUrl":"https://doi.org/10.1109/ICREDG.2016.7875917","url":null,"abstract":"In this paper, a hybrid DC circuit breaker based on natural Zero Current Switching for DC microgrid is proposed. In the DC networks, arc quenching is a dramatic challenge due to lack of zero crossing of current, which results in corrosion and reduction of circuit breaker lifetime. The hybrid circuit breaker conducts the current using a mechanical switch in normal condition. In fault condition, counter current of a discharging capacitor makes mechanical switch to experience zero crossing condition. Therefore, the arc can be quenched safely. Also, the fault current with relatively higher impedance can be interrupted using zero voltage switching. The proposed breaker structure is described and its performance is evaluated using different simulations.","PeriodicalId":207212,"journal":{"name":"2016 Iranian Conference on Renewable Energy & Distributed Generation (ICREDG)","volume":"57 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129343838","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 : 2016-04-02DOI: 10.1109/ICREDG.2016.7875918
Soroush Mohammadalizadeh, M. Ghayeni
Selective harmonic elimination technology (SHE) has been widely used in many medium and high power converters. Because of low switching frequency privilege in this method, low power loss is expected in the converters. Although it is still a crucial work to find optimum switching angle from a group of nonlinear transcendental equations, especially in multilevel inverters with multiple switching in each level. In this article a new strategy based on selective harmonic elimination concept (SHE-PWM) in photovoltaic multilevel inverter with multiple switching is proposed. In the proposed strategy, the solving process is divided into two steps to ease the complexity of the problem and increase the degree of control in each step. It also offers an exclusive searching scheme which makes convergence easily achievable. Simulation's result also proves validity of the proposed strategy for a wide range of modulation indices.
{"title":"A new strategy in selective harmonic elimination for a photovoltaic multilevel inverter","authors":"Soroush Mohammadalizadeh, M. Ghayeni","doi":"10.1109/ICREDG.2016.7875918","DOIUrl":"https://doi.org/10.1109/ICREDG.2016.7875918","url":null,"abstract":"Selective harmonic elimination technology (SHE) has been widely used in many medium and high power converters. Because of low switching frequency privilege in this method, low power loss is expected in the converters. Although it is still a crucial work to find optimum switching angle from a group of nonlinear transcendental equations, especially in multilevel inverters with multiple switching in each level. In this article a new strategy based on selective harmonic elimination concept (SHE-PWM) in photovoltaic multilevel inverter with multiple switching is proposed. In the proposed strategy, the solving process is divided into two steps to ease the complexity of the problem and increase the degree of control in each step. It also offers an exclusive searching scheme which makes convergence easily achievable. Simulation's result also proves validity of the proposed strategy for a wide range of modulation indices.","PeriodicalId":207212,"journal":{"name":"2016 Iranian Conference on Renewable Energy & Distributed Generation (ICREDG)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130985414","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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