Pub Date : 2016-05-22DOI: 10.1109/IPEMC.2016.7512508
Zhenbin Zhang, Xinbo Cai, R. Kennel, Fengxiang Wang
This work presents a fully FPGA based deadbeat-like predictive control scheme for back-to-back converter PMSG wind turbine systems with space vector modulator (SVM). A deadbeat-like predictive torque/current controller is used to control the machine side converter, while a deadbeat power control method in αβ frame is used to control the grid side converter. Both sides achieve nice steady state performances requiring few tuning efforts. Both the machine and grid side predictive controllers are realized on a commercial-off-the-shelf FPGA based platform. By using a single-cycle-timed-loop (SCTL) technique, the whole computation time is quite short (less than 4 μs), which makes the calculation time compensation not required. The effectiveness of the presented method is verified through experimental data.
{"title":"Fully FPGA based predictive control of back-to-back power converter PMSG wind turbine systems with space vector modulator","authors":"Zhenbin Zhang, Xinbo Cai, R. Kennel, Fengxiang Wang","doi":"10.1109/IPEMC.2016.7512508","DOIUrl":"https://doi.org/10.1109/IPEMC.2016.7512508","url":null,"abstract":"This work presents a fully FPGA based deadbeat-like predictive control scheme for back-to-back converter PMSG wind turbine systems with space vector modulator (SVM). A deadbeat-like predictive torque/current controller is used to control the machine side converter, while a deadbeat power control method in αβ frame is used to control the grid side converter. Both sides achieve nice steady state performances requiring few tuning efforts. Both the machine and grid side predictive controllers are realized on a commercial-off-the-shelf FPGA based platform. By using a single-cycle-timed-loop (SCTL) technique, the whole computation time is quite short (less than 4 μs), which makes the calculation time compensation not required. The effectiveness of the presented method is verified through experimental data.","PeriodicalId":6857,"journal":{"name":"2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)","volume":"45 1","pages":"1468-1473"},"PeriodicalIF":0.0,"publicationDate":"2016-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79298231","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 : 2016-05-22DOI: 10.1109/IPEMC.2016.7512403
Zhe Chen, Xinbo Cai, R. Kennel, Fengxiang Wang
In this work, an enhanced sensorless control of Surface-mounted PMSM is proposed based on the Stationary Reference Frame High-Frequency Pulsating Signal (SRF-HFPS) injection method. Due to the fact that the saliency of a normal SPMSM is usually weaker than that of an Interior PMSM, the SPMSM is seen as a non-salient machine whose sensorless capability is greatly limited. As a result, the sensorless control for the SPMSM is investigated in this work. In the existing SRF-HFPS method, only an inherent DC offset showing in α/β-axis currents is eliminated. However, multiple saliencies (AC harmonic) existing extensively in the AC machines should be considered and decoupled as well. Therefore, in this work, a high pass filter and an adaptive notch filter are adopted for the DC and AC harmonic decoupling, respectively. To meet the minimum requirement of saliency intensity, the weak spacial saliency needs to be enhanced. Thus, a d-axis current planning method is designed accordingly to expand the feasible area of the saliency tracking based sensorless control method. The effectiveness of proposed improvements has been verified by experimental results.
{"title":"Enhanced sensorless control of SPMSM based on Stationary Reference Frame High-Frequency Pulsating Signal injection","authors":"Zhe Chen, Xinbo Cai, R. Kennel, Fengxiang Wang","doi":"10.1109/IPEMC.2016.7512403","DOIUrl":"https://doi.org/10.1109/IPEMC.2016.7512403","url":null,"abstract":"In this work, an enhanced sensorless control of Surface-mounted PMSM is proposed based on the Stationary Reference Frame High-Frequency Pulsating Signal (SRF-HFPS) injection method. Due to the fact that the saliency of a normal SPMSM is usually weaker than that of an Interior PMSM, the SPMSM is seen as a non-salient machine whose sensorless capability is greatly limited. As a result, the sensorless control for the SPMSM is investigated in this work. In the existing SRF-HFPS method, only an inherent DC offset showing in α/β-axis currents is eliminated. However, multiple saliencies (AC harmonic) existing extensively in the AC machines should be considered and decoupled as well. Therefore, in this work, a high pass filter and an adaptive notch filter are adopted for the DC and AC harmonic decoupling, respectively. To meet the minimum requirement of saliency intensity, the weak spacial saliency needs to be enhanced. Thus, a d-axis current planning method is designed accordingly to expand the feasible area of the saliency tracking based sensorless control method. The effectiveness of proposed improvements has been verified by experimental results.","PeriodicalId":6857,"journal":{"name":"2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)","volume":"1 1","pages":"885-890"},"PeriodicalIF":0.0,"publicationDate":"2016-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79299040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to enhance the reliability and operation performance, the virtual prototype model of high voltage circuit breaker with motor driving operating mechanism are established according to the process of opening and closing operation. The relationship between the insulating bar and shaft are carried out, and verified the correctness of model by the testing results. So the contact stroke, stroke and pressure of contact spring, motor angle are obtained and analyzed through the simulation model. Finally, the influence factors of closing bounce are studied such as the moving contact quality, pre-pressure and stiffness coefficient of contact spring. The results indicate that increasing pre-pressure of contact spring is the best measures to decrease the closing bounce through parametric analysis.
{"title":"Dynamic simulation of high voltage circuit breaker motor driving operating mechanism based on virtual prototype technology","authors":"Yongxiang Li, Tianzheng Wang, Zhipeng Wang, Hua Yu","doi":"10.1109/IPEMC.2016.7512417","DOIUrl":"https://doi.org/10.1109/IPEMC.2016.7512417","url":null,"abstract":"In order to enhance the reliability and operation performance, the virtual prototype model of high voltage circuit breaker with motor driving operating mechanism are established according to the process of opening and closing operation. The relationship between the insulating bar and shaft are carried out, and verified the correctness of model by the testing results. So the contact stroke, stroke and pressure of contact spring, motor angle are obtained and analyzed through the simulation model. Finally, the influence factors of closing bounce are studied such as the moving contact quality, pre-pressure and stiffness coefficient of contact spring. The results indicate that increasing pre-pressure of contact spring is the best measures to decrease the closing bounce through parametric analysis.","PeriodicalId":6857,"journal":{"name":"2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)","volume":"76 1","pages":"963-966"},"PeriodicalIF":0.0,"publicationDate":"2016-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79501666","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 : 2016-05-22DOI: 10.1109/IPEMC.2016.7512875
Huafeng Xiao, Zhijian Fang, David Xu, Bin Wu, B. Venkatesh, B. Singh
Distributed renewable energy generation units with medium-voltage distribution grid integration are considered as the most effective utilization manner because of low cost. However, the medium-voltage level (typically reach to 50 kV) brings safety risks in the experimental debugging process of new circuit topologies and algorithms for medium-voltage interface converters if directly in a full-scale power environment at the beginning. The scale-down testing platform has brought many merits for the analysis and test of medium-voltage distribution grid with multiple grid-connected converters. Unfortunately, due to the lack of proper base value selection method for DC side parameters of DC/AC type converter, such a scale-down model is still unavailable till now. The theoretical reason is that presented quasi-per-unit models for DC/AC type converters resulted in the missing of physical meaning for DC side variables. In order to solve the problem, this paper proposes a novel DC side base value selection method based on the rules that the voltage relationship of DC/AC converter's two sides complies with the AC `transformer' principle, and their current relationship satisfies the `power conservation' principle, and the detail calculation procedure of the scale-down model parameters is listed. These contributions provide the bedrock for performing the analysis and test of new circuit topologies and algorithms for the medium-voltage interface converters.
{"title":"A testing platform for distribution grid with multiple grid-connected converters","authors":"Huafeng Xiao, Zhijian Fang, David Xu, Bin Wu, B. Venkatesh, B. Singh","doi":"10.1109/IPEMC.2016.7512875","DOIUrl":"https://doi.org/10.1109/IPEMC.2016.7512875","url":null,"abstract":"Distributed renewable energy generation units with medium-voltage distribution grid integration are considered as the most effective utilization manner because of low cost. However, the medium-voltage level (typically reach to 50 kV) brings safety risks in the experimental debugging process of new circuit topologies and algorithms for medium-voltage interface converters if directly in a full-scale power environment at the beginning. The scale-down testing platform has brought many merits for the analysis and test of medium-voltage distribution grid with multiple grid-connected converters. Unfortunately, due to the lack of proper base value selection method for DC side parameters of DC/AC type converter, such a scale-down model is still unavailable till now. The theoretical reason is that presented quasi-per-unit models for DC/AC type converters resulted in the missing of physical meaning for DC side variables. In order to solve the problem, this paper proposes a novel DC side base value selection method based on the rules that the voltage relationship of DC/AC converter's two sides complies with the AC `transformer' principle, and their current relationship satisfies the `power conservation' principle, and the detail calculation procedure of the scale-down model parameters is listed. These contributions provide the bedrock for performing the analysis and test of new circuit topologies and algorithms for the medium-voltage interface converters.","PeriodicalId":6857,"journal":{"name":"2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)","volume":"1 1","pages":"3621-3626"},"PeriodicalIF":0.0,"publicationDate":"2016-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84439369","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 : 2016-05-22DOI: 10.1109/IPEMC.2016.7512667
Feng Zhang, Xu Yang, Kangping Wang, G. Xu, Lang Huang, Wenjie Chen
In this paper, a novel discrete time-domain MMC Sub Module (SM) model is proposed for fast simulation of MMC circuits. Firstly, by using Modified Nodal Approach (MNA), the switch in SM is replaced by a changeable voltage source in series with a resistor. Then the SM model is simplified in form and mathematics expression for fast simulation. Secondly, stability of these algorithms are discussed in detail. It is because applying various numerical integration algorithms to the SM model will get different difference expressions, which may result in stability problem. Finally, the efficiency and accuracy of the model are validated using a 20-level MMC circuit by comparison with commercial simulation software.
{"title":"A discrete time-domain model for fast simulation of MMC circuits","authors":"Feng Zhang, Xu Yang, Kangping Wang, G. Xu, Lang Huang, Wenjie Chen","doi":"10.1109/IPEMC.2016.7512667","DOIUrl":"https://doi.org/10.1109/IPEMC.2016.7512667","url":null,"abstract":"In this paper, a novel discrete time-domain MMC Sub Module (SM) model is proposed for fast simulation of MMC circuits. Firstly, by using Modified Nodal Approach (MNA), the switch in SM is replaced by a changeable voltage source in series with a resistor. Then the SM model is simplified in form and mathematics expression for fast simulation. Secondly, stability of these algorithms are discussed in detail. It is because applying various numerical integration algorithms to the SM model will get different difference expressions, which may result in stability problem. Finally, the efficiency and accuracy of the model are validated using a 20-level MMC circuit by comparison with commercial simulation software.","PeriodicalId":6857,"journal":{"name":"2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)","volume":"56 1","pages":"2366-2370"},"PeriodicalIF":0.0,"publicationDate":"2016-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84570736","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 : 2016-05-22DOI: 10.1109/IPEMC.2016.7512771
Hongda Liu, Ying Xu, Yu Pang
Solar photovoltaic (PV) power generation technology applied on ship is a new research direction to reduce carbon dioxide emissions and improve the energy efficiency. Position and moving posture of the ship will be changing when a marine ship is sailing in ocean, as a result, solar total irradiance on PV panels will be different with those on the land, which is changing with fluctuations any time. Then the PV output power(PVOP)will appear fluctuations with the rolling ship, which increased the uncertainty of the original PVOP. In order to exactly estimate the solar total irradiance in sailing ship and deal with the problem of PVOP fluctuations, this paper establishes a suitable calculation model for solar total irradiance (STI) and designs a suitable hybrid energy storage system (HESS) and its controller based on STI in sailing ship. The controller of HESS can smooth the PVOP fluctuations caused by the rolling ship, and to a certain extent, solve the problem that the PV power generation is difficult to schedule, which makes PVOP incorporated into the grid more reliable, economical and environmentally friendly.
{"title":"Research on hybrid energy storage system and its controller in rolling solar ship","authors":"Hongda Liu, Ying Xu, Yu Pang","doi":"10.1109/IPEMC.2016.7512771","DOIUrl":"https://doi.org/10.1109/IPEMC.2016.7512771","url":null,"abstract":"Solar photovoltaic (PV) power generation technology applied on ship is a new research direction to reduce carbon dioxide emissions and improve the energy efficiency. Position and moving posture of the ship will be changing when a marine ship is sailing in ocean, as a result, solar total irradiance on PV panels will be different with those on the land, which is changing with fluctuations any time. Then the PV output power(PVOP)will appear fluctuations with the rolling ship, which increased the uncertainty of the original PVOP. In order to exactly estimate the solar total irradiance in sailing ship and deal with the problem of PVOP fluctuations, this paper establishes a suitable calculation model for solar total irradiance (STI) and designs a suitable hybrid energy storage system (HESS) and its controller based on STI in sailing ship. The controller of HESS can smooth the PVOP fluctuations caused by the rolling ship, and to a certain extent, solve the problem that the PV power generation is difficult to schedule, which makes PVOP incorporated into the grid more reliable, economical and environmentally friendly.","PeriodicalId":6857,"journal":{"name":"2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)","volume":"31 1","pages":"2983-2987"},"PeriodicalIF":0.0,"publicationDate":"2016-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84933238","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 : 2016-05-22DOI: 10.1109/IPEMC.2016.7512355
Seiya Mizushima, Hiromi Adachi, A. Kawamura, I. Yuzurihara, Ryosuke Ohma
Radio frequency (RF) generators are used in semiconductor product manufacture. They supply high power pulse to a plasma chamber. Recently, many semiconductor products are used in electronic devices, which are getting smaller and smaller. In proportion to this, the machines which manufacture semiconductor products require higher frequency High/Low (HL) pulse power to the RF generators. A higher frequency HL pulse can be obtained by decreasing an output capacitance. However, this leads to a decrease of the output voltage stability. To solve this conflict, iLref deadbeat control method is proposed to improve them. The stability of the proposed control method was verified and improved through the evaluation, which used the equivalent transfer function of the control system. The experimental results prove that the experimental circuit was able to generate the stable 120 V/12 V HL-pulse output without voltage overshoot when the input voltage was 240V. The results also show the rise time (0 % to 99 %) was about 510 μs, that is the slew rate at rising of the output voltage was about 210 kV/sec.
{"title":"High/low pulse generation of deadbeat based high power DC-DC converter with very short rise time","authors":"Seiya Mizushima, Hiromi Adachi, A. Kawamura, I. Yuzurihara, Ryosuke Ohma","doi":"10.1109/IPEMC.2016.7512355","DOIUrl":"https://doi.org/10.1109/IPEMC.2016.7512355","url":null,"abstract":"Radio frequency (RF) generators are used in semiconductor product manufacture. They supply high power pulse to a plasma chamber. Recently, many semiconductor products are used in electronic devices, which are getting smaller and smaller. In proportion to this, the machines which manufacture semiconductor products require higher frequency High/Low (HL) pulse power to the RF generators. A higher frequency HL pulse can be obtained by decreasing an output capacitance. However, this leads to a decrease of the output voltage stability. To solve this conflict, iLref deadbeat control method is proposed to improve them. The stability of the proposed control method was verified and improved through the evaluation, which used the equivalent transfer function of the control system. The experimental results prove that the experimental circuit was able to generate the stable 120 V/12 V HL-pulse output without voltage overshoot when the input voltage was 240V. The results also show the rise time (0 % to 99 %) was about 510 μs, that is the slew rate at rising of the output voltage was about 210 kV/sec.","PeriodicalId":6857,"journal":{"name":"2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)","volume":"27 1","pages":"609-615"},"PeriodicalIF":0.0,"publicationDate":"2016-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85976679","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 : 2016-05-22DOI: 10.1109/IPEMC.2016.7512775
Youguang Guo, Jianguo Zhu, Haiyan Lu, G. Lei
Soft magnetic composite (SMC) materials possess many unique properties, which are particularly suitable for development of novel structure electric motors for various electric drive systems. The unique properties of SMC material include three-dimensional (3-D) magnetic and thermal isotropy, very low eddy current loss, and prospect of very low cost mass production. Therefore, the application of SMC materials in electrical appliance, particularly in electric motors, has attracted great interest in research. However, SMC materials also have some drawbacks, e.g. low permeability, high hysteresis loss and low mechanical strength, and hence a direct replacement of electrical steels by SMC would not necessarily lead to satisfaction or improvement of motor performance. To fully explore the application potential of the SMC materials, their unique properties should be fully employed and at the same time the effects of their drawbacks should be avoided or minimized. This paper aims to present some key issues on design of SMC electric motors based on the extensive research in the past two decades by various researchers including the authors of this paper. The key design issues are discussed and some conclusions are drawn for future effort in this area.
{"title":"Design considerations of electric motors with soft magnetic composite cores","authors":"Youguang Guo, Jianguo Zhu, Haiyan Lu, G. Lei","doi":"10.1109/IPEMC.2016.7512775","DOIUrl":"https://doi.org/10.1109/IPEMC.2016.7512775","url":null,"abstract":"Soft magnetic composite (SMC) materials possess many unique properties, which are particularly suitable for development of novel structure electric motors for various electric drive systems. The unique properties of SMC material include three-dimensional (3-D) magnetic and thermal isotropy, very low eddy current loss, and prospect of very low cost mass production. Therefore, the application of SMC materials in electrical appliance, particularly in electric motors, has attracted great interest in research. However, SMC materials also have some drawbacks, e.g. low permeability, high hysteresis loss and low mechanical strength, and hence a direct replacement of electrical steels by SMC would not necessarily lead to satisfaction or improvement of motor performance. To fully explore the application potential of the SMC materials, their unique properties should be fully employed and at the same time the effects of their drawbacks should be avoided or minimized. This paper aims to present some key issues on design of SMC electric motors based on the extensive research in the past two decades by various researchers including the authors of this paper. The key design issues are discussed and some conclusions are drawn for future effort in this area.","PeriodicalId":6857,"journal":{"name":"2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)","volume":"121 1","pages":"3007-3011"},"PeriodicalIF":0.0,"publicationDate":"2016-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76729358","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 : 2016-05-22DOI: 10.1109/IPEMC.2016.7512487
Ying Fan, Chao Tan, Siyu Chen, M. Cheng
This paper proposes a new design of interior permanent magnet (IPM) motor, which has a V-shaped rotor with a combination of the assisted arched permanent magnets and asymmetrical flux-barriers for improving the torque characteristics. This approach can guide the PM flux distribution in order to concentrate the flux lines and improve the waveforms in the air gap effectively. The proposed IPM motors are analyzed by using finite element analysis (FEA), and the beneficial attributes of the proposed new design compared with the simulation results are emphasized.
{"title":"Design and analysis of a new interior permanent magnet motor for EVs","authors":"Ying Fan, Chao Tan, Siyu Chen, M. Cheng","doi":"10.1109/IPEMC.2016.7512487","DOIUrl":"https://doi.org/10.1109/IPEMC.2016.7512487","url":null,"abstract":"This paper proposes a new design of interior permanent magnet (IPM) motor, which has a V-shaped rotor with a combination of the assisted arched permanent magnets and asymmetrical flux-barriers for improving the torque characteristics. This approach can guide the PM flux distribution in order to concentrate the flux lines and improve the waveforms in the air gap effectively. The proposed IPM motors are analyzed by using finite element analysis (FEA), and the beneficial attributes of the proposed new design compared with the simulation results are emphasized.","PeriodicalId":6857,"journal":{"name":"2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)","volume":"1 1","pages":"1357-1361"},"PeriodicalIF":0.0,"publicationDate":"2016-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77236198","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 : 2016-05-22DOI: 10.1109/IPEMC.2016.7512280
Shike Wang, Jinjun Liu, Zeng Liu, Teng Wu, Baojin Liu
The operation efficiency is always considered to be a significant issue for power electronics system, such as parallel source converters in stand-alone power system. Quite a few solutions have been developed to increase power conversion efficiency of a single converter. However, existing work concerning efficiency issue on system level is scarce. On the basis of hierarchical multilevel control theory, this paper proposed a coordinative control strategy on tertiary level to optimize steady-state operating points for each source converter in the system, reducing losses and improving the overall efficiency. Based on the quadratic loss model, the optimal power distribution ratio between two converters is firstly analyzed. By introducing the concept of equivalent converter loss model, a forward-backward sweep calculation method is generalized to N-parallel-converter system. Furthermore, the successive switching points of N converters are precisely designed to maintain minimum system losses under full load range. According to datasheets of typical industrial products, calculation examples are presented to demonstrate the validity of this proposed strategy. The maximum and average efficiency improvement is 1.55 and 0.56 in percentage respectively. Considering the rising development of renewable energy generation and microgrids, this efficiency increase will contribute considerable energy and economic savings in the long run.
{"title":"Efficiency-based optimization of steady-state operating points for parallel source converters in stand-alone power system","authors":"Shike Wang, Jinjun Liu, Zeng Liu, Teng Wu, Baojin Liu","doi":"10.1109/IPEMC.2016.7512280","DOIUrl":"https://doi.org/10.1109/IPEMC.2016.7512280","url":null,"abstract":"The operation efficiency is always considered to be a significant issue for power electronics system, such as parallel source converters in stand-alone power system. Quite a few solutions have been developed to increase power conversion efficiency of a single converter. However, existing work concerning efficiency issue on system level is scarce. On the basis of hierarchical multilevel control theory, this paper proposed a coordinative control strategy on tertiary level to optimize steady-state operating points for each source converter in the system, reducing losses and improving the overall efficiency. Based on the quadratic loss model, the optimal power distribution ratio between two converters is firstly analyzed. By introducing the concept of equivalent converter loss model, a forward-backward sweep calculation method is generalized to N-parallel-converter system. Furthermore, the successive switching points of N converters are precisely designed to maintain minimum system losses under full load range. According to datasheets of typical industrial products, calculation examples are presented to demonstrate the validity of this proposed strategy. The maximum and average efficiency improvement is 1.55 and 0.56 in percentage respectively. Considering the rising development of renewable energy generation and microgrids, this efficiency increase will contribute considerable energy and economic savings in the long run.","PeriodicalId":6857,"journal":{"name":"2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)","volume":"95 1","pages":"163-170"},"PeriodicalIF":0.0,"publicationDate":"2016-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76254803","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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