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A method for SiC MOSFETs gate oxide degradation monitoring based on turn-on di/dt delay time 基于导通di/dt延迟时间的SiC mosfet栅极氧化退化监测方法
Asia-Pacific Journal-Japan Focus Pub Date : 2022-10-28 DOI: 10.1109/ITECAsia-Pacific56316.2022.9941951
Jianlong Kang, Qiang Wu, Yu Chen, He Xu, Haoze Luo, Zhen Xin
{"title":"A method for SiC MOSFETs gate oxide degradation monitoring based on turn-on di/dt delay time","authors":"Jianlong Kang, Qiang Wu, Yu Chen, He Xu, Haoze Luo, Zhen Xin","doi":"10.1109/ITECAsia-Pacific56316.2022.9941951","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941951","url":null,"abstract":"This paper presents a method for SiC MOSFET gate oxide degradation monitoring based on turn-on di/dt delay time (di/dt-delay). The physical mechanism of turn-on di/dt shift with gate oxide degradation is first analyzed. Then, high-temperature gate bias tests are applied to two kinds of devices to accelerate gate oxide degradation. The aging test shows that turn-on di/dt-delay can be used as a precursor for SiC MOSFET gate oxide degradation with detectable amplitude shift. Subsequently, a di/dt-delay extraction circuit based on the parasitic inductance of SiC MOSFET power source pin is designed. Finally, the validity of the extraction circuit is verified by double-pulse tests.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"4 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80332399","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}
引用次数: 0
Optimal Voltage Recovery Control Scheme of Wind Farm Based on Topology Reconfiguration 基于拓扑重构的风电场电压恢复优化控制方案
Asia-Pacific Journal-Japan Focus Pub Date : 2022-10-28 DOI: 10.1109/ITECAsia-Pacific56316.2022.9942187
Shuaifeng Wang, Hanzhi Peng, Juan Wei, Guohang Huang, Sheng Huang, Lai Wei
{"title":"Optimal Voltage Recovery Control Scheme of Wind Farm Based on Topology Reconfiguration","authors":"Shuaifeng Wang, Hanzhi Peng, Juan Wei, Guohang Huang, Sheng Huang, Lai Wei","doi":"10.1109/ITECAsia-Pacific56316.2022.9942187","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942187","url":null,"abstract":"The collector line in wind farms (WFs) voltage sags may result in tripping the WT and consequently threaten the stability and security of wind farms (WFs). In this paper, the control scheme of WFs based on topology reconfiguration is proposed to recover the voltage of faulty WTs terminals and ensure the safe operation of the large-scale WFs. During the closed-loop process of collector lines, the impedance matrices of all closed-loop schemes are pre-calculated to get an approximation of the inrush current. The closed-loop positions of collector lines are optimized based on the integer second-order cone programming by considering the contact line cost and average voltage deviation. Finally, the fault is isolated by circuit breakers to recover the flow direction of WFs. The effectiveness of the proposed closed-loop scheme is validated in Matlab.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"14 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76438753","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}
引用次数: 0
Analysis of High Step-up Switched Capacitor DC-DC Converter Based on Coupled Inductors 基于耦合电感的高升压开关电容DC-DC变换器分析
Asia-Pacific Journal-Japan Focus Pub Date : 2022-10-28 DOI: 10.1109/ITECAsia-Pacific56316.2022.9941945
Hao Liu, Xuechen Bai, Jingyun Gu, Hongye Cai, Xiangjun Zhang, Dianguo Xu
{"title":"Analysis of High Step-up Switched Capacitor DC-DC Converter Based on Coupled Inductors","authors":"Hao Liu, Xuechen Bai, Jingyun Gu, Hongye Cai, Xiangjun Zhang, Dianguo Xu","doi":"10.1109/ITECAsia-Pacific56316.2022.9941945","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941945","url":null,"abstract":"A novel high step-up switched capacitor DC-DC converter based on coupled inductors is proposed in this paper. The proposed topology solves the problem of insufficient voltage on the switched capacitor, thus improves the traditional energy storage structure. Combined with the coupled inductor, which further improve the voltage gain characteristics and reduce the stress of the switching device. The operating principle and steady state analysis of the converter are introduced in details, and a 200W experimental prototype with an input voltage of25-45V and an output voltage of 380V is established in the laboratory to verify the feasibility of the converter.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"124 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76699293","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}
引用次数: 0
Frequency Response and Fault Ride Through of a Novel MMC Based Hybrid Energy Storage System 一种新型MMC混合储能系统的频率响应与故障穿越
Asia-Pacific Journal-Japan Focus Pub Date : 2022-10-28 DOI: 10.1109/ITECAsia-Pacific56316.2022.9941862
A. Minfu, Yixuan Fang, Zai-xin Yang, Baiqing Yin, Pengfei Hu
{"title":"Frequency Response and Fault Ride Through of a Novel MMC Based Hybrid Energy Storage System","authors":"A. Minfu, Yixuan Fang, Zai-xin Yang, Baiqing Yin, Pengfei Hu","doi":"10.1109/ITECAsia-Pacific56316.2022.9941862","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941862","url":null,"abstract":"Energy storage is seen as a solution to the problem of inertia and fault ride through in high penetration power system. Comparing to single energy storage system, hybrid energy storage system has some advantages and has drown much attention. A novel hybrid energy storage topology based on multilevel modular converter(MMC) has been proposed. The MMC-based topology has better reliability, and simplified control. This paper focus on the operation of the MMC-based hybrid energy storage system under dynamic and grid fault conditions. The frequency response and power allocation method for the MMC-based hybrid energy storage under dynamic conditions is presented, and unbalance current compensation and low voltage ride through strategy is proposed. A low voltage ride through recover method is proposed to fasten the recover process. All the control method is verified by PLECS-based simulation. With proposed control in this paper, the MMC-based hybrid energy storage can deal with several dynamic and grid fault conditions.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"37 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87347742","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}
引用次数: 0
Active RC Auxiliary Circuit With Parameter Switching Scheme for Stabilization and Transient Mitigation of Cascaded DC/DC Systems 带参数开关的有源RC辅助电路用于级联DC/DC系统的稳定和暂态缓解
Asia-Pacific Journal-Japan Focus Pub Date : 2022-10-28 DOI: 10.1109/ITECAsia-Pacific56316.2022.9941881
Yufei Si, Z. Shan
{"title":"Active RC Auxiliary Circuit With Parameter Switching Scheme for Stabilization and Transient Mitigation of Cascaded DC/DC Systems","authors":"Yufei Si, Z. Shan","doi":"10.1109/ITECAsia-Pacific56316.2022.9941881","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941881","url":null,"abstract":"DC distribution power systems have been widely used in more electric aircraft, electric vehicles, etc. Therein, power converters in the energy source and loads are connected to the DC bus, and hence form a cascaded system. In this context, voltage oscillations due to the control interaction should be avoided in the system. In addition, the system requires a regulated bus voltage with small transient deviations. However, most existing stabilization methods including active capacitor converters cannot ensure the transient performance of the cascaded system. This paper proposes an active auxiliary circuit that can emulate passive RC circuits and switch the RC parameters in load transients and steady states, which can stabilize the cascaded system and mitigate fast load transients. The parameter design of the proposed auxiliary circuit and the stability analysis of the cascaded system with the auxiliary circuit are introduced. Simulation results are given to verify the feasibility of the proposed method.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"78 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86085110","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}
引用次数: 0
Thermally and electromagnetically driven flow in liquid metal battery and their effects on ionic /atomic transport 液态金属电池中的热驱动和电磁驱动流动及其对离子/原子输运的影响
Asia-Pacific Journal-Japan Focus Pub Date : 2022-10-28 DOI: 10.1109/ITECAsia-Pacific56316.2022.9942009
Chenglian Gao, Kangli Wang, Xianbo Zhou, Kai Jiang, Haomiao Li
{"title":"Thermally and electromagnetically driven flow in liquid metal battery and their effects on ionic /atomic transport","authors":"Chenglian Gao, Kangli Wang, Xianbo Zhou, Kai Jiang, Haomiao Li","doi":"10.1109/ITECAsia-Pacific56316.2022.9942009","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942009","url":null,"abstract":"Liquid metal battery (LMB) is considered a promising grid-level energy storage technology due to its low cost, long lifespan, and feasible amplification. As an all-liquid battery, the mechanisms and effects of its internal flow still need to be further studied. In this work, we establish two-dimensional (2D) axisymmetric models coupling both the thermal field and electromagnetic field based on Li|LiCl-KCl|Bi system. The fluid motions inside the batteries driven by temperature field, electromagnetic field, and coupled field are analyzed contrastively, revealing the dominant role of thermal convection. Moreover, the effects of the flow driven by different physical fields on the electrochemical reaction process are investigated. Those results are of great significance for further understanding the electrochemical process of LMB and other battery systems and optimizing the battery performance.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"110 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80573309","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}
引用次数: 0
Analysis of Energy Storage Participation Policies in an Electricity Market Environment 电力市场环境下储能参与政策分析
Asia-Pacific Journal-Japan Focus Pub Date : 2022-10-28 DOI: 10.1109/ITECAsia-Pacific56316.2022.9942219
Yizheng Wang, Jiahua Hu, Xin Fang, Jianing Li, Hongliang Wang, Z. Lan
{"title":"Analysis of Energy Storage Participation Policies in an Electricity Market Environment","authors":"Yizheng Wang, Jiahua Hu, Xin Fang, Jianing Li, Hongliang Wang, Z. Lan","doi":"10.1109/ITECAsia-Pacific56316.2022.9942219","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942219","url":null,"abstract":"As an essential technology to solve renewable energy absorption, energy storage plays a vital role in the new power system. However, the cost recovery of energy storage is complex, and government subsidies are still needed at this stage. To save government investment and improve the economic benefits of energy storage, the authorities need to choose an appropriate technology route so that the market can better allocate energy storage resources. The paper studies the current situation and policies of energy storage participation in the electricity market and provides essential experience for developing the regional electricity market in China. The main goal of energy storage is to maximize the portfolio’s profitability and find a balance between market revenues, overall storage costs, and reliable operations. The results of this paper suggest that the relevant authorities should clarify the main identity of energy storage in the electricity market and revise the mechanisms to help it participate in the ancillary services market, and should allow large storage plants and aggregated distributed storage to participate in each market segment, allowing them to trade flexibly in each market to exploit their flexibility and system value fully.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"41 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85120155","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}
引用次数: 0
Solving the 90% Infrastructure Energy Challenge for Passenger Electric Vehicles 解决乘用车90%的基础设施能源挑战
Asia-Pacific Journal-Japan Focus Pub Date : 2022-10-28 DOI: 10.1109/ITECAsia-Pacific56316.2022.9941804
P. Krein
{"title":"Solving the 90% Infrastructure Energy Challenge for Passenger Electric Vehicles","authors":"P. Krein","doi":"10.1109/ITECAsia-Pacific56316.2022.9941804","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941804","url":null,"abstract":"Based on actual daily driving data, about 90% of passenger electric vehicle energy needs, both in the U.S. and in China, can be supported by charging from conventional single-phase outlets. This represents about half of all transportation energy, once the transition to electricity is complete. Basic outlet infrastructure is far cheaper and more scalable than the faster infrastructure emphasized in much present work. Comparisons are made to show how basic outlets can serve as critical electrification infrastructure. The vehicles themselves can support measurement, metering, and communication for billing and for grid flexibility. A vehicle owner can choose to support limited flexibility, controlled by the vehicle itself, to track for minimum energy pricing. Alternatively, for even lower prices, a vehicle owner could allow a grid operator or aggregator to modulate charging and support dynamic grid services. The work shows how infrastructure in a city can scale to millions of energy access points.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"17 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81687656","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}
引用次数: 0
Torque Improvement of Dual Three-phase YASA Machine Based on Current Harmonics Injection 基于电流谐波注入的双三相YASA电机转矩改进
Asia-Pacific Journal-Japan Focus Pub Date : 2022-10-28 DOI: 10.1109/ITECAsia-Pacific56316.2022.9941832
Xu Yan, Zhongze Wu, Lingyun Shao, W. Hua, Zhuoran Zhang, Ming-Ming Cheng
{"title":"Torque Improvement of Dual Three-phase YASA Machine Based on Current Harmonics Injection","authors":"Xu Yan, Zhongze Wu, Lingyun Shao, W. Hua, Zhuoran Zhang, Ming-Ming Cheng","doi":"10.1109/ITECAsia-Pacific56316.2022.9941832","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941832","url":null,"abstract":"The method for enhancing the torque capability of the dual three-phase yokeless and segmented armature (YASA) axial flux permanent magnet machine by injecting the 5th and 7th current harmonics is proposed in this paper. The mathematical model of the dual three-phase YASA machine considering the 5th and 7th harmonics of the open-circuit flux-linkage is established based on vector space decomposition method. The parametric model and vector control systems with and without the 5th and 7th current harmonics injection of the dual three-phase YASA machine are built to verify the effectiveness of torque enhancement by current harmonics injection. The simulation results show that the torque per peak current of the analyzed YASA machine can be improved by 8.74% by injecting 5th and 7th current harmonics.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"22 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91303287","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}
引用次数: 0
Online Junction Temperature Monitoring for Discrete SiC MOSFET Based on On-state Voltage at High Temperature 基于高温导通电压的离散SiC MOSFET结温在线监测
Asia-Pacific Journal-Japan Focus Pub Date : 2022-10-28 DOI: 10.1109/ITECAsia-Pacific56316.2022.9941977
Haoran Hu, Zhiqiang Wang, Yimin Zhou, Da Zhou, Guoqing Xin, Xiaojie Shi
{"title":"Online Junction Temperature Monitoring for Discrete SiC MOSFET Based on On-state Voltage at High Temperature","authors":"Haoran Hu, Zhiqiang Wang, Yimin Zhou, Da Zhou, Guoqing Xin, Xiaojie Shi","doi":"10.1109/ITECAsia-Pacific56316.2022.9941977","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941977","url":null,"abstract":"Junction temperature monitoring is crucial for condition monitoring and thermal management of power semiconductor devices. In this paper, the online monitoring of junction temperature for discrete SiC MOSFETs is achieved by simultaneous measurements of their on-state voltage and current. A dedicated calibration circuit that decouples switching and conduction losses is used to obtain a look-up table for the junction temperature. According to the test results, under the operating condition with current of 50 A and temperature of $175^{circ} C$, a single pulse test of $10 mu$ can cause a temperature rise of 8-9 $^{circ} C$, due to the self-heating effect of the discrete SiC MOSFETs. This temperature rise of DUT during the calibration test is compensated by the Foster network thermal model of the device afterwards.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"18 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90157860","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}
引用次数: 2
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