Pub Date : 2021-11-13DOI: 10.1109/peas53589.2021.9628454
Xing Wei, Long Jin, Zhan Shen, Zhike Xu, Tao Wang, Jingwen Leng
This paper introduces a transformer-based converter suitable for high-voltage and high-power dc loads, e.g., electrostatic precipitators (ESPs). The proposed ESP supply has a rapid dynamic response in complex precipitation conditions with an improved hardware-based hysteresis current control system. The power level can automatically track the load fluctuation to guarantee the particle collection efficiency of precipitators. According to the relationship between switching frequency, current hysteresis width and output voltage, a quasi-constant operating frequency is achieved over the entire load range by dynamically adjusting the hysteresis width, which avoids excessive switching losses and voltage ripple. The system is co-designed with the medium-frequency transformer to optimize the loss and performance. The experimental results verify that the devised system is reasonable, reliable, and saves energy. The field operation data on pollutant emission satisfy the strictest standards in China and the European Union.
{"title":"Design of a High-Power Efficient Converter with Medium-Frequency Transformer for Industrial Electrostatic Precipitators","authors":"Xing Wei, Long Jin, Zhan Shen, Zhike Xu, Tao Wang, Jingwen Leng","doi":"10.1109/peas53589.2021.9628454","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628454","url":null,"abstract":"This paper introduces a transformer-based converter suitable for high-voltage and high-power dc loads, e.g., electrostatic precipitators (ESPs). The proposed ESP supply has a rapid dynamic response in complex precipitation conditions with an improved hardware-based hysteresis current control system. The power level can automatically track the load fluctuation to guarantee the particle collection efficiency of precipitators. According to the relationship between switching frequency, current hysteresis width and output voltage, a quasi-constant operating frequency is achieved over the entire load range by dynamically adjusting the hysteresis width, which avoids excessive switching losses and voltage ripple. The system is co-designed with the medium-frequency transformer to optimize the loss and performance. The experimental results verify that the devised system is reasonable, reliable, and saves energy. The field operation data on pollutant emission satisfy the strictest standards in China and the European Union.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"31 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115797693","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}
The control system design of Vienna rectifier is inseparable from the parameters of grid voltage, which will increase the cost and complexity when using voltage sensors. Therefore, this paper proposes a grid voltage sensorless model predictive control strategy for Vienna rectifier. Firstly, the virtual flux mathematical model of Vienna rectifier is established to estimate the grid voltage. Due to the mathematical model contains integral operation, the integrator is modified to a second-order low-pass filter (LPF) by solving the problems of integral initial value and dc bias to improve the observation effect. Then, the given values of active power and reactive power of the system are obtained through the outer loop. Lastly, combined with direct power and model predictive control (DPMPC), it can quickly find the switch sequence of tracking target. A simplified vector selection is also used to the system to reduce the computational complexity. Thus, it is verified the correctness of the theoretical analysis, and the results shows that the proposed model predictive direct power control has good steady-state and dynamic performance.
{"title":"An Improved Voltage Sensorless Model Predictive Direct Power Control for Vienna Rectifier","authors":"Chaoliang Dang, Fei Wang, Xiangqian Tong, Ding-I Liu, Xiaoyu Mu, Weizhang Song","doi":"10.1109/peas53589.2021.9628848","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628848","url":null,"abstract":"The control system design of Vienna rectifier is inseparable from the parameters of grid voltage, which will increase the cost and complexity when using voltage sensors. Therefore, this paper proposes a grid voltage sensorless model predictive control strategy for Vienna rectifier. Firstly, the virtual flux mathematical model of Vienna rectifier is established to estimate the grid voltage. Due to the mathematical model contains integral operation, the integrator is modified to a second-order low-pass filter (LPF) by solving the problems of integral initial value and dc bias to improve the observation effect. Then, the given values of active power and reactive power of the system are obtained through the outer loop. Lastly, combined with direct power and model predictive control (DPMPC), it can quickly find the switch sequence of tracking target. A simplified vector selection is also used to the system to reduce the computational complexity. Thus, it is verified the correctness of the theoretical analysis, and the results shows that the proposed model predictive direct power control has good steady-state and dynamic performance.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127508266","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628801
Jun Mei, Q. Gao, X. Cai
This paper proposes a novel bidirectional DC-DC converter. It contains three sets of cascaded bidirectional boost converters at the low-voltage side (LVS), and its unique connection method divides the LVS current into three branches. One switched capacitor module is configured at the converter’s high voltage side (HVS). This paper analyzes the working principle of the proposed converter in the steady state, and derives the corresponding voltage-current relationship. Finally, by verification in a simulation model, the correctness of the theoretical analysis is demonstrated.
{"title":"High Gain Bidirectional DC-DC Converter with Three Boost Converters and Switched Capacitor","authors":"Jun Mei, Q. Gao, X. Cai","doi":"10.1109/peas53589.2021.9628801","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628801","url":null,"abstract":"This paper proposes a novel bidirectional DC-DC converter. It contains three sets of cascaded bidirectional boost converters at the low-voltage side (LVS), and its unique connection method divides the LVS current into three branches. One switched capacitor module is configured at the converter’s high voltage side (HVS). This paper analyzes the working principle of the proposed converter in the steady state, and derives the corresponding voltage-current relationship. Finally, by verification in a simulation model, the correctness of the theoretical analysis is demonstrated.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124171088","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628496
Jun Zou, Mingming Ji, Fan Yang, Yue Liu, Hongfei Wu
Optimal design and implementation of high-efficiency and high-power-density CLL resonant converter with gallium nitride transistor and integrated magnetics is presented. The matrix transformer and resonant inductor are integrated into a magnetic core. The core loss after integration is reduced by flux cancellation and verified by finite element analysis (FEA) tools. A symmetrical PCB winding layout is presented for a 7:2 transformer turns ratio. To reduce the common mode noise caused by the interlayer capacitance of the PCB winding, half of the shielding is used as the primary winding. Finally, a 1.2-MHz 750-W 270-V/48-V CLL converter prototype is demonstrated to verify the effectiveness of the magnetic integration structure with PCB-winding. The peak efficiency of the prototype is 96.6% and the power density is 720W/in3.
{"title":"Optimal Design of Integrated Magnetics and PCB Winding for CLL Resonant Converter","authors":"Jun Zou, Mingming Ji, Fan Yang, Yue Liu, Hongfei Wu","doi":"10.1109/peas53589.2021.9628496","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628496","url":null,"abstract":"Optimal design and implementation of high-efficiency and high-power-density CLL resonant converter with gallium nitride transistor and integrated magnetics is presented. The matrix transformer and resonant inductor are integrated into a magnetic core. The core loss after integration is reduced by flux cancellation and verified by finite element analysis (FEA) tools. A symmetrical PCB winding layout is presented for a 7:2 transformer turns ratio. To reduce the common mode noise caused by the interlayer capacitance of the PCB winding, half of the shielding is used as the primary winding. Finally, a 1.2-MHz 750-W 270-V/48-V CLL converter prototype is demonstrated to verify the effectiveness of the magnetic integration structure with PCB-winding. The peak efficiency of the prototype is 96.6% and the power density is 720W/in3.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122078766","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628811
Ye Lin, Jinghao Zhou, Yi Hao, Xiaolei Yang, Yuhan Zhou
For the purpose of improving the efficiency of small signal analysis and equivalent analysis in the large-scale offshore wind power farm, a dynamic equivalent method based on the operation states is proposed in this paper. Firstly, the dynamic model of multi-infeed wind power farm in the global coordinate is derived for the small signal stability analysis, and then the characteristic equation of the system is formed. Secondly, the characteristic equation is further simplified to a low-order sum form by eigenvalue decoupling method. Then, we can divide and aggregate the converters in the offshore wind power farm based on the numerical comparison process between the eigenvalues of devices and the system’s equivalent eigenvalues under the dominant modes. Further, the equivalent parameters of the equivalent model can be obtained according to the critical conditions. Finally, the effectiveness of the dynamic equivalent method for offshore wind power farm is verified by the eigenvalue analysis and the time domain simulation.
{"title":"A Dynamic Equivalent Method for the Offshore Wind Power Farm Based on Operation State","authors":"Ye Lin, Jinghao Zhou, Yi Hao, Xiaolei Yang, Yuhan Zhou","doi":"10.1109/peas53589.2021.9628811","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628811","url":null,"abstract":"For the purpose of improving the efficiency of small signal analysis and equivalent analysis in the large-scale offshore wind power farm, a dynamic equivalent method based on the operation states is proposed in this paper. Firstly, the dynamic model of multi-infeed wind power farm in the global coordinate is derived for the small signal stability analysis, and then the characteristic equation of the system is formed. Secondly, the characteristic equation is further simplified to a low-order sum form by eigenvalue decoupling method. Then, we can divide and aggregate the converters in the offshore wind power farm based on the numerical comparison process between the eigenvalues of devices and the system’s equivalent eigenvalues under the dominant modes. Further, the equivalent parameters of the equivalent model can be obtained according to the critical conditions. Finally, the effectiveness of the dynamic equivalent method for offshore wind power farm is verified by the eigenvalue analysis and the time domain simulation.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123808476","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628726
Liao Luwei, Wang Guojun, Song Junchao, Yang Tong, Xu Qifeng
The photovoltaic panels in most high-power satellite power supply platforms work in the DET (direct energy transmission) mode, thus the power generation is not the most efficient. This causes the problems of large area of solar panels, complex unfolded mechanism and low reliability. Through the application of MPPT (Maximum power point tracking) technology, the efficiency of photovoltaic power generation can be optimized and the design and manufacturing cost can be reduced. In this design, the new type of S3MPR (Sequential switching shunt maximum power regulator) power topology is proposed. It is based on the S3R (sequential switching shunt regulator) topology and has the ability of multi-channel parallel connection. The polarity observation method, the control algorithm realized by analog circuit, widens the application range and has simple control principle and high tracking accuracy. A simulation platform is built in Saber to verify the feasibility of the algorithm. The final physical verification shows the tracking accuracy reaches 99%.
{"title":"The analog polarity observation method based on S3MPR designed for space power sysetem","authors":"Liao Luwei, Wang Guojun, Song Junchao, Yang Tong, Xu Qifeng","doi":"10.1109/peas53589.2021.9628726","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628726","url":null,"abstract":"The photovoltaic panels in most high-power satellite power supply platforms work in the DET (direct energy transmission) mode, thus the power generation is not the most efficient. This causes the problems of large area of solar panels, complex unfolded mechanism and low reliability. Through the application of MPPT (Maximum power point tracking) technology, the efficiency of photovoltaic power generation can be optimized and the design and manufacturing cost can be reduced. In this design, the new type of S3MPR (Sequential switching shunt maximum power regulator) power topology is proposed. It is based on the S3R (sequential switching shunt regulator) topology and has the ability of multi-channel parallel connection. The polarity observation method, the control algorithm realized by analog circuit, widens the application range and has simple control principle and high tracking accuracy. A simulation platform is built in Saber to verify the feasibility of the algorithm. The final physical verification shows the tracking accuracy reaches 99%.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126251828","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628595
Dong Chen, Zehua Zhang
In this paper, an overview is conducted on the prospected "net-zero" transmission network. A review of existing root-mean-square approach in voltage stability analysis is carried out in the first place. By introducing the control paradigms of converter control for modern and future sources of renewable energy and storages, limitations of root-meansquare has been discussed. After that, an electromagnetic approach in enhancing voltage stability is illustrated. With a case study of converter domination, a counter example is presented to showcase such electromagnetic enhancement can break through the Hoff bifurcation limit set by root-meansquare representation in voltage stability with single-infinite benchmark. Finally, it is concluded that converter domination can bring about better voltage security than state-of-the-art.
{"title":"Could Converter Domination Lead to Better Voltage Stability in AC Transmission? - An Overview","authors":"Dong Chen, Zehua Zhang","doi":"10.1109/peas53589.2021.9628595","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628595","url":null,"abstract":"In this paper, an overview is conducted on the prospected \"net-zero\" transmission network. A review of existing root-mean-square approach in voltage stability analysis is carried out in the first place. By introducing the control paradigms of converter control for modern and future sources of renewable energy and storages, limitations of root-meansquare has been discussed. After that, an electromagnetic approach in enhancing voltage stability is illustrated. With a case study of converter domination, a counter example is presented to showcase such electromagnetic enhancement can break through the Hoff bifurcation limit set by root-meansquare representation in voltage stability with single-infinite benchmark. Finally, it is concluded that converter domination can bring about better voltage security than state-of-the-art.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126504718","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628731
Guoen Cao, Jin Zhang, Yibo Wang
This paper proposed a non-isolated, ultrahigh boost ratio DC-DC converter for low voltage photovoltaic power generation applications. A coupled inductor and a charge pump capacitor which operate in hybrid resonant mode are employed in the proposed topology. By transferring the inductive and capacitive energy simultaneously, ultrahigh step-up voltage gain can be achieved without large duty cycle. A lossless passive snubber circuit is used to recycle leakage energy of the coupled inductor and alleviate high voltage spike across the main switch. By operating under the hybrid resonant mode, low voltage and current stresses are achieved to the switches and snubber circuit. The duty cycle of the main switch can be operated within a wide range, which means a wide operation range of input and output voltage. In addition, all switches of the proposed circuit can achieve soft-switching operation. A 1-kW prototype circuit with input voltage of 20-30V and output voltage of 300V was implemented to verify the theoretical analysis and performance of the proposed converter.
{"title":"Non-isolated Ultrahigh Boost Ratio DCDC Converter with Coupled Inductor and Charge Pump","authors":"Guoen Cao, Jin Zhang, Yibo Wang","doi":"10.1109/peas53589.2021.9628731","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628731","url":null,"abstract":"This paper proposed a non-isolated, ultrahigh boost ratio DC-DC converter for low voltage photovoltaic power generation applications. A coupled inductor and a charge pump capacitor which operate in hybrid resonant mode are employed in the proposed topology. By transferring the inductive and capacitive energy simultaneously, ultrahigh step-up voltage gain can be achieved without large duty cycle. A lossless passive snubber circuit is used to recycle leakage energy of the coupled inductor and alleviate high voltage spike across the main switch. By operating under the hybrid resonant mode, low voltage and current stresses are achieved to the switches and snubber circuit. The duty cycle of the main switch can be operated within a wide range, which means a wide operation range of input and output voltage. In addition, all switches of the proposed circuit can achieve soft-switching operation. A 1-kW prototype circuit with input voltage of 20-30V and output voltage of 300V was implemented to verify the theoretical analysis and performance of the proposed converter.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131703528","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628783
Li Tu, Yuexi Yang, Jie Yang, Tongyue Sun
The use of MMC converters virtually decouples offshore wind farms from the AC grid, which shall modify system inertia to affect its capability to through the disturbances of system frequency. In this paper, the existing inertia controller for MMC-HVDC Based offshore wind farm integration were classified into two categories and their working principles and control strategies are summarized. On this basis, a synthetic Inertia controller was proposed. It can be regarded as a combination of two mainstream strategies and has the advantages of both but avoids their respective shortcomings, which could provide the larger and longer synthetic inertia support. Finally, the dynamic performance of MMC-HVDC system has been successfully demonstrated by PSCAD/EMTDC simulations for the proposed synthetic inertia controller. The simulation figures demonstrate the proposed controller is capable of delivering the desired active power response to a rate of change of frequency (RoCoF) step change in the onshore network.
{"title":"The Synthetic Inertia Controller for MMC-HVDC Based Offshore Wind Farm Integration","authors":"Li Tu, Yuexi Yang, Jie Yang, Tongyue Sun","doi":"10.1109/peas53589.2021.9628783","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628783","url":null,"abstract":"The use of MMC converters virtually decouples offshore wind farms from the AC grid, which shall modify system inertia to affect its capability to through the disturbances of system frequency. In this paper, the existing inertia controller for MMC-HVDC Based offshore wind farm integration were classified into two categories and their working principles and control strategies are summarized. On this basis, a synthetic Inertia controller was proposed. It can be regarded as a combination of two mainstream strategies and has the advantages of both but avoids their respective shortcomings, which could provide the larger and longer synthetic inertia support. Finally, the dynamic performance of MMC-HVDC system has been successfully demonstrated by PSCAD/EMTDC simulations for the proposed synthetic inertia controller. The simulation figures demonstrate the proposed controller is capable of delivering the desired active power response to a rate of change of frequency (RoCoF) step change in the onshore network.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"51 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131893613","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 : 2021-11-13DOI: 10.1109/peas53589.2021.9628844
Jianxiong Yu, Jiatong Zhang, R. Lu, R. Zhao, Chushan Li, Wuhua Li
Modular solid state transformer (SST) has prevailed in recent years, due to its feasibility for power management. Generally, an SST uses power semiconductors on medium voltage gird side to support the grid voltage, and it uses medium frequency transformers to replace the bulky line-frequency transformer. Therefore, a competitive lifespan of an SST compared with conventional power conversion system is a key topic in this area. Thermal control plays an important role in lifespan management of power semiconductors, which is the key components in SSTs. Thus, this paper proposes an active thermal control strategy for Cascaded H-Bridge (CHB) in SSTs to increase lifespan of the rectifier stage. Employed by the proposed strategy, simulated circuit shows that thermal stress on power semiconductors in CHBs is effectively balanced, and the maximum junction temperature can be reduced by 10.2%, which leads to a longer lifespan of key components.
{"title":"Active Thermal Control for Cascaded H-Bridges in Solid State Transformers","authors":"Jianxiong Yu, Jiatong Zhang, R. Lu, R. Zhao, Chushan Li, Wuhua Li","doi":"10.1109/peas53589.2021.9628844","DOIUrl":"https://doi.org/10.1109/peas53589.2021.9628844","url":null,"abstract":"Modular solid state transformer (SST) has prevailed in recent years, due to its feasibility for power management. Generally, an SST uses power semiconductors on medium voltage gird side to support the grid voltage, and it uses medium frequency transformers to replace the bulky line-frequency transformer. Therefore, a competitive lifespan of an SST compared with conventional power conversion system is a key topic in this area. Thermal control plays an important role in lifespan management of power semiconductors, which is the key components in SSTs. Thus, this paper proposes an active thermal control strategy for Cascaded H-Bridge (CHB) in SSTs to increase lifespan of the rectifier stage. Employed by the proposed strategy, simulated circuit shows that thermal stress on power semiconductors in CHBs is effectively balanced, and the maximum junction temperature can be reduced by 10.2%, which leads to a longer lifespan of key components.","PeriodicalId":268264,"journal":{"name":"2021 IEEE 1st International Power Electronics and Application Symposium (PEAS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128301808","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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