Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507744
Hongchang Li, Jingyang Fang, Yi Tang
Dynamical models are of primary interest when studying the dynamical control of wireless power transfer (WPT) systems. Most existing dynamical models of WPT systems are derived using the generalized state space averaging method, extended describing functions, or the concept of coupled modes. These models are applicable to both tuned and detuned WPT systems but suffer from high orders and complex formulae. This paper focuses on tuned WPT systems and proposes the reduced-order dynamical models, which are derived from the energy point of view. The proposed models have much lower orders and simpler formulae as compared to the existing models. Experimental results are presented for verification.
{"title":"Reduced-Order Dynamical Models of Tuned Wireless Power Transfer Systems","authors":"Hongchang Li, Jingyang Fang, Yi Tang","doi":"10.23919/IPEC.2018.8507744","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507744","url":null,"abstract":"Dynamical models are of primary interest when studying the dynamical control of wireless power transfer (WPT) systems. Most existing dynamical models of WPT systems are derived using the generalized state space averaging method, extended describing functions, or the concept of coupled modes. These models are applicable to both tuned and detuned WPT systems but suffer from high orders and complex formulae. This paper focuses on tuned WPT systems and proposes the reduced-order dynamical models, which are derived from the energy point of view. The proposed models have much lower orders and simpler formulae as compared to the existing models. Experimental results are presented for verification.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"15 1","pages":"337-341"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73393539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507566
Xiang Lin, K. Sun, Jin Lin, Zhe Zhang, W. Kong
Reversible Solid Oxide Fuel Cell/Electrolyser Cell (SOFC/EC) technology is an attractive solution for high energy storage system in the utility grid. However, the wide range of voltage and low power of single SOFC/EC stack make it difficult to design the power conversion system for SOFC/EC storage system. In this paper, a new power multi-port bidirectional conversion system is proposed to connect multiple SOFC/EC stacks with the utility grid. The converter structure contains a multi-port structure with two conversion stages. The two-stage conversion structure is first analyzed to address the wide-range of SOFC/EC stack’s voltage. The high-step-down CLLC resonant converter is implemented to achieve efficient voltage transformation, and the interleaved buck converter is employed as the second stage to control the voltage of SOFC/EC stack within a wide range. The derivation of the multi-port structure is introduced, and the control strategy of proposed conversion system is also discussed in this paper. The proposed conversion system enables a flexible control for the application of multiple SOFC/EC stacks. The feature of the proposed system is verified by the experiments from a down-scale prototype.
{"title":"A Multi-Port Bidirectional Power Conversion System for Reversible Solid Oxide Fuel Cell Applications","authors":"Xiang Lin, K. Sun, Jin Lin, Zhe Zhang, W. Kong","doi":"10.23919/IPEC.2018.8507566","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507566","url":null,"abstract":"Reversible Solid Oxide Fuel Cell/Electrolyser Cell (SOFC/EC) technology is an attractive solution for high energy storage system in the utility grid. However, the wide range of voltage and low power of single SOFC/EC stack make it difficult to design the power conversion system for SOFC/EC storage system. In this paper, a new power multi-port bidirectional conversion system is proposed to connect multiple SOFC/EC stacks with the utility grid. The converter structure contains a multi-port structure with two conversion stages. The two-stage conversion structure is first analyzed to address the wide-range of SOFC/EC stack’s voltage. The high-step-down CLLC resonant converter is implemented to achieve efficient voltage transformation, and the interleaved buck converter is employed as the second stage to control the voltage of SOFC/EC stack within a wide range. The derivation of the multi-port structure is introduced, and the control strategy of proposed conversion system is also discussed in this paper. The proposed conversion system enables a flexible control for the application of multiple SOFC/EC stacks. The feature of the proposed system is verified by the experiments from a down-scale prototype.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"6 1","pages":"3460-3465"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73665628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507671
Lei Gu, K. Surakitbovorn, J. Rivas-Davila
Applying RF circuit design techniques to dc-dc power conversion has pushed the switching frequency of power converters using discrete components well beyond 10 MHz. This paper proposes a simple solution to implement synchronous rectification for resonant dc-dc power converters operating at above 10 MHz, by using a symmetric bandpass matching network between the inverter and rectifier. The bandpass matching network enables the synchronous switch to be driven by the same clock signal as the inverter switch. Furthermore, this family of high frequency converter is able to maintain zero-voltage-switching operation over a wide load range. A 200 W 13.56 MHz 210 V-to-30 V bidirectional converter with a peak efficiency of 90% is demonstrated.
{"title":"High-Frequency Resonant Converter with Synchronous Rectification for High Conversion Ratio and Variable Load Operation","authors":"Lei Gu, K. Surakitbovorn, J. Rivas-Davila","doi":"10.23919/IPEC.2018.8507671","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507671","url":null,"abstract":"Applying RF circuit design techniques to dc-dc power conversion has pushed the switching frequency of power converters using discrete components well beyond 10 MHz. This paper proposes a simple solution to implement synchronous rectification for resonant dc-dc power converters operating at above 10 MHz, by using a symmetric bandpass matching network between the inverter and rectifier. The bandpass matching network enables the synchronous switch to be driven by the same clock signal as the inverter switch. Furthermore, this family of high frequency converter is able to maintain zero-voltage-switching operation over a wide load range. A 200 W 13.56 MHz 210 V-to-30 V bidirectional converter with a peak efficiency of 90% is demonstrated.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"628 1","pages":"632-638"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85232551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507812
S. Jumayev, K. O. Boynov, E. Lomonova, J. Pyrhonen
This paper presents a design framework for high-speed slotless permanent magnet machines based on extended harmonic modeling (HM) technique to predict various electromagnetic properties and torque distribution. The developed models for generic design framework are able to evaluate slotless PM machines’ topologies with a wide range of 3D slotless windings, (including those with skewing), and can be also used for future design optimization routines.
{"title":"High-speed Slotless Permanent Magnet Machines: modelling and design frameworks","authors":"S. Jumayev, K. O. Boynov, E. Lomonova, J. Pyrhonen","doi":"10.23919/IPEC.2018.8507812","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507812","url":null,"abstract":"This paper presents a design framework for high-speed slotless permanent magnet machines based on extended harmonic modeling (HM) technique to predict various electromagnetic properties and torque distribution. The developed models for generic design framework are able to evaluate slotless PM machines’ topologies with a wide range of 3D slotless windings, (including those with skewing), and can be also used for future design optimization routines.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"32 1","pages":"161-168"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88646433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507820
M. Berg, T. Messo, T. Suntio
The grid-forming mode of the voltage source inverters (VSI) is applied in uninterruptible power supplies and micro-grids to improve the reliability of electricity distribution. During the intentional islanding of an inverter-based micro-grid, the grid-forming inverters (GFI) are responsible for voltage control, similarly as in the case of uninterruptible power supplies (UPS). The unterminated model of GFI can be developed by considering the load as an ideal current sink. Thus, the load impedance always affects the dynamic behavior of the GFI. This paper proposes a method, to analyze how the dynamics of GFI and the controller design are affected by the load. Particularly, how the frequency response of the voltage loop gain changes according to the load and, how it can be used to the predict time-domain step response. The frequency responses that are measured from a hardware-in-the-loop simulator are used to verify and illustrate explicitly the load effect.
{"title":"Frequency Response Analysis of Load Effect on Dynamics of Grid-Forming Inverter","authors":"M. Berg, T. Messo, T. Suntio","doi":"10.23919/IPEC.2018.8507820","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507820","url":null,"abstract":"The grid-forming mode of the voltage source inverters (VSI) is applied in uninterruptible power supplies and micro-grids to improve the reliability of electricity distribution. During the intentional islanding of an inverter-based micro-grid, the grid-forming inverters (GFI) are responsible for voltage control, similarly as in the case of uninterruptible power supplies (UPS). The unterminated model of GFI can be developed by considering the load as an ideal current sink. Thus, the load impedance always affects the dynamic behavior of the GFI. This paper proposes a method, to analyze how the dynamics of GFI and the controller design are affected by the load. Particularly, how the frequency response of the voltage loop gain changes according to the load and, how it can be used to the predict time-domain step response. The frequency responses that are measured from a hardware-in-the-loop simulator are used to verify and illustrate explicitly the load effect.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"34 1","pages":"963-970"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77754202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507995
A. Vass-Várnai, Youngmin Cho, G. Farkas, M. Rencz
To determine the thermal properties of power semiconductor devices and structures, the JEDEC JESD 51-1 static, electrical test method is a well-known and industry-wide accepted technique. The approach provides accurate and repeatable results in case of silicon based transistors in all cases. For certain compound semiconductor components, such as SiC MOSFET-s and GaN HEMT structures, the application of the electrical test method becomes in some cases challenging. If traditional test setups are used, in the unit step response function, due to parasitic effects, an electric signal may superpose on the thermal signal of interest, making it hard or even impossible to analyze the test results. If the structure has a physical diode as well, it can be used to understand the thermal properties of the package and its layers. This information can be applied in another step to gather the thermal properties from die transistors’ point of view as well, without measuring it. In this article we show a combined measurement and simulation based method, which allows the accurate thermal characterization of such components, even in cases when other approaches may fail.
{"title":"An Alternative Method to Accurately Determine the Thermal Resistance of SiC MOSFET Structures with Discrete Diodes","authors":"A. Vass-Várnai, Youngmin Cho, G. Farkas, M. Rencz","doi":"10.23919/IPEC.2018.8507995","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507995","url":null,"abstract":"To determine the thermal properties of power semiconductor devices and structures, the JEDEC JESD 51-1 static, electrical test method is a well-known and industry-wide accepted technique. The approach provides accurate and repeatable results in case of silicon based transistors in all cases. For certain compound semiconductor components, such as SiC MOSFET-s and GaN HEMT structures, the application of the electrical test method becomes in some cases challenging. If traditional test setups are used, in the unit step response function, due to parasitic effects, an electric signal may superpose on the thermal signal of interest, making it hard or even impossible to analyze the test results. If the structure has a physical diode as well, it can be used to understand the thermal properties of the package and its layers. This information can be applied in another step to gather the thermal properties from die transistors’ point of view as well, without measuring it. In this article we show a combined measurement and simulation based method, which allows the accurate thermal characterization of such components, even in cases when other approaches may fail.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"1 1","pages":"137-141"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91317886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507656
Sungyong Shin, Naruse Hikaru, T. Kosaka, N. Matsui
In order to minimize torque ripple in switched reluctance motor (SRM), many kinds of methods have been proposed. One of them is current profile tracking control based on a motor model, torque-position-current model, which can be derived from magnetizing curves. However, the current profile tracking control has a problem which is an increase in torque ripple at the current overlapping region under high load condition. In this paper, through magnetic analyses using 2D-FEA and mathematical analyses regarding 4-phase 8/6 SRM, the reason of the increase in torque ripple is revealed and a novel torque- position-current model taking mutual coupling effect into account is proposed for better torque ripple minimization control.
{"title":"Torque Ripple Minimization Control of SRM Based on Novel Motor Model Considering Mutual Coupling Effect","authors":"Sungyong Shin, Naruse Hikaru, T. Kosaka, N. Matsui","doi":"10.23919/IPEC.2018.8507656","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507656","url":null,"abstract":"In order to minimize torque ripple in switched reluctance motor (SRM), many kinds of methods have been proposed. One of them is current profile tracking control based on a motor model, torque-position-current model, which can be derived from magnetizing curves. However, the current profile tracking control has a problem which is an increase in torque ripple at the current overlapping region under high load condition. In this paper, through magnetic analyses using 2D-FEA and mathematical analyses regarding 4-phase 8/6 SRM, the reason of the increase in torque ripple is revealed and a novel torque- position-current model taking mutual coupling effect into account is proposed for better torque ripple minimization control.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"72 9 1","pages":"3418-3425"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90258726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507930
Philipp Joebges, A. Gorodnichev, R. D. De Doncker
This paper discusses the operation of a three-phase three-level dual-active bridge (3L-DAB3) dc-dc converter in medium-voltage dc (MVDC) grids with a symmetrical monopole configuration. Due to the demand of bipolar mode operation, active control of the midpoint potential is essential to ensure balanced grid voltages even under non-symmetrical loads. The proposed solution is achieved with a novel modulation scheme, which allows a power and midpoint control to enable voltage balancing. Due to the large number of degrees of freedom, look-up tables (LUTs) are generated and used to operate with a maximum converter efficiency. The proposed method is implemented and validated in simulations and on a low-power prototype setup.
{"title":"Modulation and Active Midpoint Control of a Three-Level Three-Phase Dual-Active Bridge DC-DC Converter under Non-Symmetrical Load","authors":"Philipp Joebges, A. Gorodnichev, R. D. De Doncker","doi":"10.23919/IPEC.2018.8507930","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507930","url":null,"abstract":"This paper discusses the operation of a three-phase three-level dual-active bridge (3L-DAB3) dc-dc converter in medium-voltage dc (MVDC) grids with a symmetrical monopole configuration. Due to the demand of bipolar mode operation, active control of the midpoint potential is essential to ensure balanced grid voltages even under non-symmetrical loads. The proposed solution is achieved with a novel modulation scheme, which allows a power and midpoint control to enable voltage balancing. Due to the large number of degrees of freedom, look-up tables (LUTs) are generated and used to operate with a maximum converter efficiency. The proposed method is implemented and validated in simulations and on a low-power prototype setup.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"15 1","pages":"375-382"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90674237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507573
T. Messo, R. Luhtala, A. Aapro, T. Roinila
Power quality problems caused by grid-connected renewable energy inverters have been reported in recent literature. Excessive harmonics and interharmonics may arise when the inverter starts to interact with the grid impedance. Small-signal impedance models have been proven to be useful tools to analyze the stability margins. However, most often the grid voltage feedforward loop employed by the inverter is not included in impedance-based analysis. To fill this gap, this paper presents an impedance model, which includes the effect of feedforward, to analyze impedance-based stability in the presence of large grid impedance. The model is verified by impedance measurements from a laboratory prototype. The model is shown to give accurate prediction of small-signal stability when the Nyquist stability-criterion is applied. Thus, the model can be used to re-shape the inverter impedance to avoid stability problems. The developed impedance model will also provide a useful tool to monitor stability margins online, which necessitates adaptive impedance-shaping of grid-connected inverters.
{"title":"Accurate Impedance Model of Grid-Connected Inverter for Small-Signal Stability Assessment in High-Impedance Grids","authors":"T. Messo, R. Luhtala, A. Aapro, T. Roinila","doi":"10.23919/IPEC.2018.8507573","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507573","url":null,"abstract":"Power quality problems caused by grid-connected renewable energy inverters have been reported in recent literature. Excessive harmonics and interharmonics may arise when the inverter starts to interact with the grid impedance. Small-signal impedance models have been proven to be useful tools to analyze the stability margins. However, most often the grid voltage feedforward loop employed by the inverter is not included in impedance-based analysis. To fill this gap, this paper presents an impedance model, which includes the effect of feedforward, to analyze impedance-based stability in the presence of large grid impedance. The model is verified by impedance measurements from a laboratory prototype. The model is shown to give accurate prediction of small-signal stability when the Nyquist stability-criterion is applied. Thus, the model can be used to re-shape the inverter impedance to avoid stability problems. The developed impedance model will also provide a useful tool to monitor stability margins online, which necessitates adaptive impedance-shaping of grid-connected inverters.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"15 1","pages":"3156-3163"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82321553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-20DOI: 10.23919/IPEC.2018.8507447
Heng Wu, Xiongfei Wang
The phase-locked loop (PLL) is widely used in the grid-connected voltage source converter (VSC) for the purpose of grid synchronization. The impact of the PLL on the small-signal stability of VSC has recently been revealed, yet its influence on the transient stability of the VSC has seldom been addressed. This paper thus presents a comprehensive analysis on the transient stability effect of the PLL. It points out that the conventional equal-area criterion (EAC), which is used to analyze the transient stability of the synchronous generator (SG), cannot be extended to analyze the PLL effect, even though a dynamic analogy between the PLL and the swing equation of the SG can be found. The phase portrait is thus used in this work, and it shows that the long settling time and a high damping ratio of the PLL can enhance the transient stability of the VSC. Finally, the experimental tests are performed to verify the effectiveness of the theoretical analysis.
{"title":"Transient Stability Impact of the Phase-Locked Loop on Grid-Connected Voltage Source Converters","authors":"Heng Wu, Xiongfei Wang","doi":"10.23919/IPEC.2018.8507447","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507447","url":null,"abstract":"The phase-locked loop (PLL) is widely used in the grid-connected voltage source converter (VSC) for the purpose of grid synchronization. The impact of the PLL on the small-signal stability of VSC has recently been revealed, yet its influence on the transient stability of the VSC has seldom been addressed. This paper thus presents a comprehensive analysis on the transient stability effect of the PLL. It points out that the conventional equal-area criterion (EAC), which is used to analyze the transient stability of the synchronous generator (SG), cannot be extended to analyze the PLL effect, even though a dynamic analogy between the PLL and the swing equation of the SG can be found. The phase portrait is thus used in this work, and it shows that the long settling time and a high damping ratio of the PLL can enhance the transient stability of the VSC. Finally, the experimental tests are performed to verify the effectiveness of the theoretical analysis.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"13 1","pages":"2673-2680"},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89737498","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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