Pub Date : 2016-03-20DOI: 10.1109/APEC.2016.7467998
H. Sarnago, Óscar Lucía, J. Burdío
Induction heating is an efficient and high performance heating method which already has a significant market penetration and economic impact due to its benefits inherent to contactless energy transfer systems such as quickness, cleanness, and safety. In order to improve the efficiency and performance of modern induction heating systems, this paper presents a multiple-output boost resonant inverter. The proposed topologies significantly improves the converter efficiency due to the reduced current level while being able to supply several induction loads. Consequently, a high-performance and cost-effective implementation is achieved. The proposed converter has been tested through a 3.6-kW dual-output prototype, proving the feasibility of this proposal.
{"title":"Multiple-output boost resonant inverter for high efficiency and cost-effective induction heating applications","authors":"H. Sarnago, Óscar Lucía, J. Burdío","doi":"10.1109/APEC.2016.7467998","DOIUrl":"https://doi.org/10.1109/APEC.2016.7467998","url":null,"abstract":"Induction heating is an efficient and high performance heating method which already has a significant market penetration and economic impact due to its benefits inherent to contactless energy transfer systems such as quickness, cleanness, and safety. In order to improve the efficiency and performance of modern induction heating systems, this paper presents a multiple-output boost resonant inverter. The proposed topologies significantly improves the converter efficiency due to the reduced current level while being able to supply several induction loads. Consequently, a high-performance and cost-effective implementation is achieved. The proposed converter has been tested through a 3.6-kW dual-output prototype, proving the feasibility of this proposal.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124102913","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 : 2016-03-20DOI: 10.1109/APEC.2016.7468070
Jiangchao Qin, S. Debnath, M. Saeedifard
The modular multilevel converter (MMC) has become one of the most promising converter technologies for medium/high-power applications, specifically for high-voltage direct current (HVDC) transmission systems. One of the technical challenges associated with the operation and control of the MMC-based system is to precharge the submodule (SM) capacitors to their nominal voltages during the startup process. In this paper, considering various SM circuits, a general precharging strategy is proposed for the MMC-based systems under ac-and dc-side startup conditions. The proposed startup method does not require any additional feedback control loop, extra measurements, and/or auxiliary power supplies. Based on the developed startup method, the charging current is controllable by adjusting the changing rate of the number of blocked and bypassed SM capacitors. Performance of the proposed strategy for various MMCs is evaluated based on time-domain simulation studies in the PSCAD/EMTDC software environment.
{"title":"Precharging strategy for soft startup process of modular multilevel converters based on various SM circuits","authors":"Jiangchao Qin, S. Debnath, M. Saeedifard","doi":"10.1109/APEC.2016.7468070","DOIUrl":"https://doi.org/10.1109/APEC.2016.7468070","url":null,"abstract":"The modular multilevel converter (MMC) has become one of the most promising converter technologies for medium/high-power applications, specifically for high-voltage direct current (HVDC) transmission systems. One of the technical challenges associated with the operation and control of the MMC-based system is to precharge the submodule (SM) capacitors to their nominal voltages during the startup process. In this paper, considering various SM circuits, a general precharging strategy is proposed for the MMC-based systems under ac-and dc-side startup conditions. The proposed startup method does not require any additional feedback control loop, extra measurements, and/or auxiliary power supplies. Based on the developed startup method, the charging current is controllable by adjusting the changing rate of the number of blocked and bypassed SM capacitors. Performance of the proposed strategy for various MMCs is evaluated based on time-domain simulation studies in the PSCAD/EMTDC software environment.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125844699","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 : 2016-03-20DOI: 10.1109/APEC.2016.7467952
Xing Li, Hua Lin
To investigate the instability issues of three-phase voltage source converters (VSCs) connected to a weak grid, this paper develops a modeling method based on the harmonic-balance approach. The nonlinear coordinate transformation in the control system would generate two sideband components. If the grid is not strong while the bandwidth of phase-locked loop (PLL) is high enough, the sideband components would be coupled, and both of them have influence on system stability, neither of them could be neglected. Hence, there would be two feedback loops of grid-current representing two sideband frequencies. Taking this effect into account, the multifrequency small-signal model is proposed. It is further demonstrated that the sum of the two grid-current loop gains determines the stability and transient performance. Simulations and experimental results were conducted to validate the analysis.
{"title":"Multifrequency small-signal model of voltage source converters connected to a weak grid for stability analysis","authors":"Xing Li, Hua Lin","doi":"10.1109/APEC.2016.7467952","DOIUrl":"https://doi.org/10.1109/APEC.2016.7467952","url":null,"abstract":"To investigate the instability issues of three-phase voltage source converters (VSCs) connected to a weak grid, this paper develops a modeling method based on the harmonic-balance approach. The nonlinear coordinate transformation in the control system would generate two sideband components. If the grid is not strong while the bandwidth of phase-locked loop (PLL) is high enough, the sideband components would be coupled, and both of them have influence on system stability, neither of them could be neglected. Hence, there would be two feedback loops of grid-current representing two sideband frequencies. Taking this effect into account, the multifrequency small-signal model is proposed. It is further demonstrated that the sum of the two grid-current loop gains determines the stability and transient performance. Simulations and experimental results were conducted to validate the analysis.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124968695","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 : 2016-03-20DOI: 10.1109/APEC.2016.7467874
B. Tekgun, Ali R. Boynuegri Chowdhury, Md Asif Mahmood, Y. Sozer
In this paper, design and implementation of a sinusoidal flux controller has been proposed for a core loss tester for eliminating the higher order harmonics from the flux passing through the core. The core loss test is performed with a toroidal transformer that consists of a main and sense windings wound on a toroidal core. The flux through the core is calculated with the numerical integration of the sense coil voltage. The controller commands the voltage applied to the main winding to keep the sense coil voltage thus the flux waveform sinusoidal. A single-phase SiC inverter operating at 150 kHz has been developed to generate the waveforms, an LC filter is used between the converter and the toroidal transformer to smooth the pulsating inverter output voltages. To be able to achieve zero steady state error and fast tracking as well as being robust to the periodic errors, a new controller is proposed. The proposed controller includes the periodic, conventional feedback and feedforward controllers and coordinates them. The designed controller has been simulated and it has been found that the flux waveform tracks the reference fast enough with a satisfactory steady state error. The system has been tested through experiments and experimental results are in good agreement with the simulation results.
{"title":"Design and implementation of a sinusoidal flux controller for core loss measurements","authors":"B. Tekgun, Ali R. Boynuegri Chowdhury, Md Asif Mahmood, Y. Sozer","doi":"10.1109/APEC.2016.7467874","DOIUrl":"https://doi.org/10.1109/APEC.2016.7467874","url":null,"abstract":"In this paper, design and implementation of a sinusoidal flux controller has been proposed for a core loss tester for eliminating the higher order harmonics from the flux passing through the core. The core loss test is performed with a toroidal transformer that consists of a main and sense windings wound on a toroidal core. The flux through the core is calculated with the numerical integration of the sense coil voltage. The controller commands the voltage applied to the main winding to keep the sense coil voltage thus the flux waveform sinusoidal. A single-phase SiC inverter operating at 150 kHz has been developed to generate the waveforms, an LC filter is used between the converter and the toroidal transformer to smooth the pulsating inverter output voltages. To be able to achieve zero steady state error and fast tracking as well as being robust to the periodic errors, a new controller is proposed. The proposed controller includes the periodic, conventional feedback and feedforward controllers and coordinates them. The designed controller has been simulated and it has been found that the flux waveform tracks the reference fast enough with a satisfactory steady state error. The system has been tested through experiments and experimental results are in good agreement with the simulation results.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129791968","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 : 2016-03-20DOI: 10.1109/APEC.2016.7467985
T. Wu, Hui-Chung Hsieh, L.-C. Lin, C.-H. Chang
There has been a growing demand of using multi-function inverters for grid-connected systems applied to nonconventional energy sources, such as solar, wind and so on. In addition to power quality conditioning, the inverter can also be used for bidirectional active power exchange with a three-phase four-wire grid. Therefore, the inverter acts as a multi-function compensator. The functions of the proposed inverter system include active power injection, rectification and active power filtering (APF) (including phase power balancing). This paper presents design and implementation of a three-leg split-capacitor shunt multi-function inverter with division-summation (D-Σ) digital control. The adopted D-Σ digital control can accommodate filter inductance variation, reducing core size significantly, and its control laws can be derived directly to cancel the variation effects of dc-bus voltage, switching period and filter inductance. An average power method is adopted in this paper for determining fundamental currents at the source side. In the design and implementation, the inductances corresponding to various inductor currents were estimated at the startup and stored in the microcontroller for scheduling loop gain cycle by cycle, which can insure system stability. Measured results from a three-phase four-wire inverter have confirmed the analysis and discussion.
{"title":"Design and implementation of D-Σ digital controlled multi-function inverter to achieve APF, active power injection and rectification","authors":"T. Wu, Hui-Chung Hsieh, L.-C. Lin, C.-H. Chang","doi":"10.1109/APEC.2016.7467985","DOIUrl":"https://doi.org/10.1109/APEC.2016.7467985","url":null,"abstract":"There has been a growing demand of using multi-function inverters for grid-connected systems applied to nonconventional energy sources, such as solar, wind and so on. In addition to power quality conditioning, the inverter can also be used for bidirectional active power exchange with a three-phase four-wire grid. Therefore, the inverter acts as a multi-function compensator. The functions of the proposed inverter system include active power injection, rectification and active power filtering (APF) (including phase power balancing). This paper presents design and implementation of a three-leg split-capacitor shunt multi-function inverter with division-summation (D-Σ) digital control. The adopted D-Σ digital control can accommodate filter inductance variation, reducing core size significantly, and its control laws can be derived directly to cancel the variation effects of dc-bus voltage, switching period and filter inductance. An average power method is adopted in this paper for determining fundamental currents at the source side. In the design and implementation, the inductances corresponding to various inductor currents were estimated at the startup and stored in the microcontroller for scheduling loop gain cycle by cycle, which can insure system stability. Measured results from a three-phase four-wire inverter have confirmed the analysis and discussion.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129901125","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 : 2016-03-20DOI: 10.1109/APEC.2016.7467851
Ayan Mallik, B. Faulkner, A. Khaligh
Advances in power electronics are enabling More Electric Aircrafts (MEAs) to replace pneumatic systems with electrical systems. Active power factor correction (PFC) rectifiers are used in MEAs to rectify the output voltage of the three-phase AC-DC boost converter, while maintaining a unity input power factor. Many existing control strategies implement PI compensators, with slow response times, in their voltage and current loops. Alternatively, computationally expensive nonlinear controllers can be chosen to generate input currents with high power factor and low total harmonic distortion (THD), but they may need to be operated at high switching frequencies due to relatively slower execution of control loop. In this work, a novel control strategy is proposed for a three-phase, single-stage boost-type rectifier that is capable of tight and fast regulation of the output voltage, while simultaneously achieving unity input power factor, without constraining the operating switching frequency. The proposed control strategy is implemented, using one voltage-loop PI controller and a linearized transfer function of duty-ratio to input current, for inner loop current control. A 1.5 kW three-phase boost PFC prototype is designed and developed to validate the proposed control algorithm. The experimental results show that an input power factor of 0.992 and a tightly regulated DC link voltage with 3% ripple can be achieved.
{"title":"Control of a single-stage three-phase boost power factor correction rectifier","authors":"Ayan Mallik, B. Faulkner, A. Khaligh","doi":"10.1109/APEC.2016.7467851","DOIUrl":"https://doi.org/10.1109/APEC.2016.7467851","url":null,"abstract":"Advances in power electronics are enabling More Electric Aircrafts (MEAs) to replace pneumatic systems with electrical systems. Active power factor correction (PFC) rectifiers are used in MEAs to rectify the output voltage of the three-phase AC-DC boost converter, while maintaining a unity input power factor. Many existing control strategies implement PI compensators, with slow response times, in their voltage and current loops. Alternatively, computationally expensive nonlinear controllers can be chosen to generate input currents with high power factor and low total harmonic distortion (THD), but they may need to be operated at high switching frequencies due to relatively slower execution of control loop. In this work, a novel control strategy is proposed for a three-phase, single-stage boost-type rectifier that is capable of tight and fast regulation of the output voltage, while simultaneously achieving unity input power factor, without constraining the operating switching frequency. The proposed control strategy is implemented, using one voltage-loop PI controller and a linearized transfer function of duty-ratio to input current, for inner loop current control. A 1.5 kW three-phase boost PFC prototype is designed and developed to validate the proposed control algorithm. The experimental results show that an input power factor of 0.992 and a tightly regulated DC link voltage with 3% ripple can be achieved.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127106186","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 : 2016-03-20DOI: 10.1109/APEC.2016.7468311
M. Salameh, Ben Schweitzer, P. Sveum, S. Al-Hallaj, M. Krishnamurthy
This paper proposes the design of an online temperature estimation technique for a Li-ion battery pack that utilizes phase change composite (PCC™) for thermal management. The phase change composite allows heat absorption and distribution, enabling lightweight and compact packs with extended cycle-life and safety. A coupled electro-thermal model has been developed for the cylindrical 18650 Li-ion cells, from which the cell heat generation is calculated. The electrical equivalent circuit comprises three RC pairs, where their values are functions of temperature and state of charge. An analytical thermal model is developed for the battery pack, considering the phase change composite and cells, which allows online temperature estimation all over the battery pack.
{"title":"Online temperature estimation for phase change composite - 18650 lithium ion cells based battery pack","authors":"M. Salameh, Ben Schweitzer, P. Sveum, S. Al-Hallaj, M. Krishnamurthy","doi":"10.1109/APEC.2016.7468311","DOIUrl":"https://doi.org/10.1109/APEC.2016.7468311","url":null,"abstract":"This paper proposes the design of an online temperature estimation technique for a Li-ion battery pack that utilizes phase change composite (PCC™) for thermal management. The phase change composite allows heat absorption and distribution, enabling lightweight and compact packs with extended cycle-life and safety. A coupled electro-thermal model has been developed for the cylindrical 18650 Li-ion cells, from which the cell heat generation is calculated. The electrical equivalent circuit comprises three RC pairs, where their values are functions of temperature and state of charge. An analytical thermal model is developed for the battery pack, considering the phase change composite and cells, which allows online temperature estimation all over the battery pack.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127393784","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 : 2016-03-20DOI: 10.1109/APEC.2016.7468327
V. I. Kumar, S. Kapat
Envelope tracking (ET) applications demand high tracking bandwidth and high efficiency using a DC-DC converter. Design based on small-signal models using fixed frequency digital pulse width modulator (DPWM) often results in limited closed-loop bandwidth. This paper proposes a mixed-signal hysteresis current control (MSHCC) in a DC-DC buck converter with an analog current-loop and a digital voltage controller Gc(z). This achieves robust stability and parameter insensitive current ripple by sampling the output voltage at the rising edge of high side gate signal. A fixed-gain power amplifier driven by a buck converter can be assumed to be a constant resistive load. Thus the load current information is directly obtained from the reference command, which further improves the tracking performance. The real-time tuning of Gc(z) using the proposed MSHCC achieves fast recovery with an inherent current limiting, and the use of the internal model control (IMC) further minimizes the tracking error. A fixed frequency operation can be achieved through a real-time band adaptation. The proposed controller is implemented using an FPGA device.
{"title":"Mixed-signal hysteretic internal model control of buck converters for ultra-fast envelope tracking","authors":"V. I. Kumar, S. Kapat","doi":"10.1109/APEC.2016.7468327","DOIUrl":"https://doi.org/10.1109/APEC.2016.7468327","url":null,"abstract":"Envelope tracking (ET) applications demand high tracking bandwidth and high efficiency using a DC-DC converter. Design based on small-signal models using fixed frequency digital pulse width modulator (DPWM) often results in limited closed-loop bandwidth. This paper proposes a mixed-signal hysteresis current control (MSHCC) in a DC-DC buck converter with an analog current-loop and a digital voltage controller Gc(z). This achieves robust stability and parameter insensitive current ripple by sampling the output voltage at the rising edge of high side gate signal. A fixed-gain power amplifier driven by a buck converter can be assumed to be a constant resistive load. Thus the load current information is directly obtained from the reference command, which further improves the tracking performance. The real-time tuning of Gc(z) using the proposed MSHCC achieves fast recovery with an inherent current limiting, and the use of the internal model control (IMC) further minimizes the tracking error. A fixed frequency operation can be achieved through a real-time band adaptation. The proposed controller is implemented using an FPGA device.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129930744","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 : 2016-03-20DOI: 10.1109/APEC.2016.7468312
Jian-wei Yang, M. Dou, Zhiyong Dai, Dongdong Zhao, Zhen Zhang
Multiphase PMSMs are widely used in fault-tolerant control applications. And one of the important fault-tolerant control problems is fault diagnosis. In most existing references, the fault diagnosis always focuses on three-phase PMSM. In this paper, a novel model and a fault diagnosis method of inter-turn short circuit (ITSC) fault for five-phase PMSM based on particle swarm optimization (PSO) are presented. There are two contributions in this paper: 1) By analyzing the physical parameters of the PMSM, such as resistance, inductance and flux, the mathematic model of ITSC fault for five-phase PMSM is established. 2) A parameter estimation method based on PSO algorithm, which introduces a fitness function related to the ITSC ratio and reformulates the fault parameters identification problem as the extreme seeking problem, is proposed to track the actual ITSC ratio and detect the fault level for five-phase PMSM. Simulation results provide preliminary verification of the proposed model and fault diagnosis method.
{"title":"Modeling and fault diagnosis of inter-turn short circuit for five-phase PMSM based on Particle Swarm Optimization","authors":"Jian-wei Yang, M. Dou, Zhiyong Dai, Dongdong Zhao, Zhen Zhang","doi":"10.1109/APEC.2016.7468312","DOIUrl":"https://doi.org/10.1109/APEC.2016.7468312","url":null,"abstract":"Multiphase PMSMs are widely used in fault-tolerant control applications. And one of the important fault-tolerant control problems is fault diagnosis. In most existing references, the fault diagnosis always focuses on three-phase PMSM. In this paper, a novel model and a fault diagnosis method of inter-turn short circuit (ITSC) fault for five-phase PMSM based on particle swarm optimization (PSO) are presented. There are two contributions in this paper: 1) By analyzing the physical parameters of the PMSM, such as resistance, inductance and flux, the mathematic model of ITSC fault for five-phase PMSM is established. 2) A parameter estimation method based on PSO algorithm, which introduces a fitness function related to the ITSC ratio and reformulates the fault parameters identification problem as the extreme seeking problem, is proposed to track the actual ITSC ratio and detect the fault level for five-phase PMSM. Simulation results provide preliminary verification of the proposed model and fault diagnosis method.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129154313","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 : 2016-03-20DOI: 10.1109/APEC.2016.7467981
Tao Xu, F. Gao
The distributed inverters are generally integrated into power grid without switching sequence coordinated control capability since they are equipped with their own micro controllers to command the output quantities. The switching ripples of all distributed inverters will then be randomly accumulated at the point of common coupling. The recently proposed global synchronous pulsewidth modulation (GSPWM) method however can significantly attenuate the accumulated switching ripples by periodically coordinating the distributed inverters at low synchronization frequency. GSPWM can be applied to reduce filter or switching frequency of coordinated inverters under high reliable communication system. While to increase the system robustness, this paper deeply analyzes the performance of GSPWM when the communication channels fail, especially lose the synchronous signals. And then the self-synchronization method is proposed to avoid the breakdown of GSPWM. Moreover, the self-synchronization operation could benefit to explore a simplified method to calculate the sending frequency of synchronous signals, which can greatly release the calculation burden. Finally, experimental results are presented to verify the performance of the proposed self-synchronization operation of GSWPM.
{"title":"Self-synchronization operation of global synchronous pulsewidth modulation with communication fault tolerant and simplified calculation capabilities","authors":"Tao Xu, F. Gao","doi":"10.1109/APEC.2016.7467981","DOIUrl":"https://doi.org/10.1109/APEC.2016.7467981","url":null,"abstract":"The distributed inverters are generally integrated into power grid without switching sequence coordinated control capability since they are equipped with their own micro controllers to command the output quantities. The switching ripples of all distributed inverters will then be randomly accumulated at the point of common coupling. The recently proposed global synchronous pulsewidth modulation (GSPWM) method however can significantly attenuate the accumulated switching ripples by periodically coordinating the distributed inverters at low synchronization frequency. GSPWM can be applied to reduce filter or switching frequency of coordinated inverters under high reliable communication system. While to increase the system robustness, this paper deeply analyzes the performance of GSPWM when the communication channels fail, especially lose the synchronous signals. And then the self-synchronization method is proposed to avoid the breakdown of GSPWM. Moreover, the self-synchronization operation could benefit to explore a simplified method to calculate the sending frequency of synchronous signals, which can greatly release the calculation burden. Finally, experimental results are presented to verify the performance of the proposed self-synchronization operation of GSWPM.","PeriodicalId":143091,"journal":{"name":"2016 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132880504","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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