{"title":"A PV-Grid Fed DTC Based Induction Motor Drive for Water Pumping","authors":"Saurabh Shukla, Bhim Singh","doi":"10.1109/ECCE.2018.8557624","DOIUrl":"https://doi.org/10.1109/ECCE.2018.8557624","url":null,"abstract":"This paper presents an effective technique for uninterrupted water pumping irrespective of insolation level. Moreover, the system is capable of adjusting the power flow as per the requirement. A sensorless direct torque control of induction motor is used to drive water pump. One VSC (Voltage Source Converter) is used for utility grid interface and one VSI (Voltage Source Inverter) is used for the induction motor control. The PV array is connected to the DC link with a power converter for providing constant DC-link voltage. The UVT (Unit Vector Template) theory is utilized to control the bidirectional power flow between the three-phase VSI and DC link voltage connecting an induction motor drive coupled water pump on the other end. The suitability of the system is shown through various power transfer modes of operation and are validated on prototype developed in the laboratory.","PeriodicalId":415217,"journal":{"name":"2018 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124933586","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}
{"title":"Implementation of BAT Algorithm as Maximum Power Point Tracking Technique for Photovoltaic System Under Partial Shading Conditions","authors":"K. Tey, S. Mekhilef, M. Seyedmahmoudian","doi":"10.1109/ECCE.2018.8557460","DOIUrl":"https://doi.org/10.1109/ECCE.2018.8557460","url":null,"abstract":"Partial shading condition is one of the main problem in the implementation of PV system as electricity generation. Thus, a maximum power point tracking (MPPT) technique which able to track the global maximum power point (GMPP) is very important. This paper introduces a MPPT algorithm which is able to track the GMPP by using the bat optimization algorithm. Generally, the disadvantages of using optimization algorithm as MPPT method is the long tracking time required. The proposed bat algorithm has the capability to converge rapidly towards the GMPP along the searching process by using the variable pulse rate and loudness parameters. The simulation and experimental results of the proposed algorithm shows that the GMPP is able to be tracked within 1.5 seconds accurately for different partial shading condition.","PeriodicalId":415217,"journal":{"name":"2018 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125071688","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}
{"title":"A 95%-Efficient 48V-to-1V/10A VRM Hybrid Converter Using Interleaved Dual Inductors","authors":"Gab-Su Seo, R. Das, Hanh-Phuc Le","doi":"10.1109/ECCE.2018.8557715","DOIUrl":"https://doi.org/10.1109/ECCE.2018.8557715","url":null,"abstract":"This paper presents a new 48 V-to-1 V hybrid converter. The converter utilizes two interleaved inductors to achieve complete soft-charging of flying capacitors to efficiently support high output currents. This dual inductor hybrid converter (DIHC) features fewer number of switches and more effective switch utilization than a recently reported hybrid Dickson converter, leading to substantially less conduction losses presented by a smaller equivalent output impedance. Experimental results verify the converter's operation principles and advantages in a 300-kHz 20-W prototype achieving 95.02% peak efficiency and 225 W/in3 power density. Its advantages and performance promise a good candidate converter architecture for applications that require large conversion ratios and high output currents, such as data centers and high-performance digital systems.","PeriodicalId":415217,"journal":{"name":"2018 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125854508","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}
{"title":"Variable Switching Frequency PWM for Three-Level Grid-Connected Inverters with LCL Filters","authors":"Xuan Zhao, Jianan Chen, Dong Jiang","doi":"10.1109/ECCE.2018.8557834","DOIUrl":"https://doi.org/10.1109/ECCE.2018.8557834","url":null,"abstract":"With the rapid development of photovoltaic (PV) power generation, three-level grid-connected inverter play an important role in photovoltaic systems for its excellent performance. This paper gives the theoretical analysis of current ripple prediction for three-level inverters based on equivalent converter-load model and briefly introduces the variable switching frequency PWM (VSFPWM) based on this prediction method to control three-level inverters with LCL filters. The VSFPWM could make a wide range of frequency changes and obtain better efficiency by reducing the switching losses. The variable switching frequency control could also attenuate EMI noises without increasing current ripple peak value and meet the power quality requirements. Simulation and experimental results in a prototype inverter are provided to verify the proposed methods.","PeriodicalId":415217,"journal":{"name":"2018 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125345704","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}
A. Athavale, D. Reigosa, K. Akatsu, K. Sakai, R. Lorenz
{"title":"Scalability and Key Tradeoffs of Variable Flux PM Machines for EV Traction Motor Systems","authors":"A. Athavale, D. Reigosa, K. Akatsu, K. Sakai, R. Lorenz","doi":"10.1109/ECCE.2018.8558007","DOIUrl":"https://doi.org/10.1109/ECCE.2018.8558007","url":null,"abstract":"Methodologies for the design and control of variable flux permanent magnet synchronous machines (VF-PMSMs) to meet electric vehicle traction requirements with significantly reduced driving cycle losses have been proposed recently. The effectiveness of the proposed methods was demonstrated by a systematic design based on finite element analysis (FEA) and experimental driving cycle loss evaluation of a full scale VF-PMSM prototype. In this paper, simplified analytical models are developed to estimate the properties and key performance metrics of VF-PMSMs across a range of power and are verified using FEA. Fundamental tradeoffs between the normalized high-speed power capability and the range of magnetization state $(boldsymbol{M}boldsymbol{S})$ variation are identified. The relationship between $boldsymbol{M}boldsymbol{S}$ variation range and driving cycle loss reduction is evaluated quantitatively across the design space. A detailed analysis of the scalability of VF-PMSMs including loss reduction capability and system cost (including active materials in the machine, inverter power electronics, and battery cost) is presented.","PeriodicalId":415217,"journal":{"name":"2018 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125378845","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}
R. Abdalaal, C. N. Ho, C. Leung, Nibrasul I. Ohin, Syed Habib Ur Rehman
{"title":"A Remotely Control Dimming System for LED Lamps with Power Factor Correction","authors":"R. Abdalaal, C. N. Ho, C. Leung, Nibrasul I. Ohin, Syed Habib Ur Rehman","doi":"10.1109/ECCE.2018.8557944","DOIUrl":"https://doi.org/10.1109/ECCE.2018.8557944","url":null,"abstract":"Modern street lighting systems require an energy-efficient dimmable road lighting system with even light distribution for safety and energy saving purposes. Existing standard TRIAC-based dimmers introduce power quality issues especially for a large-scale lighting network. This paper proposes a dimming control technique for Light Emitting Diode (LED) lamps, while maintaining high voltage and current quality. Dimming function is achieved by connecting a Voltage Source Converter (VSC) dimmer system between the AC supply and the lighting load. The VSC dimmer system will achieve high power factor and low current harmonic distortion when dimming the LED lamps. The VSC system is a comprehensive solution for most of power quality problems in the network. A VSC dimmer system prototype of 500 VA 120V has been built. An advanced feature is added to the VSC dimmer system to remotely send/receive messages between the system and the user through a Graphical User Interface (GUI). Specifically, the user can communicate with the VSC dimmer system by using Raspberry Pi. Experimental results and power analysis comparison between utilizing the TRIAC-based dimmer and the VSC dimmer system for dimming function are discussed. Setting a dimming profile to endorse energy saving will be discussed as well.","PeriodicalId":415217,"journal":{"name":"2018 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"268 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125525463","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}
R. Luhtala, T. Reinikka, T. Roinila, T. Messo, J. Sihvo
{"title":"Improved Real-Time Stability Assessment of Grid-Connected Converters Using MIMO-Identification Methods","authors":"R. Luhtala, T. Reinikka, T. Roinila, T. Messo, J. Sihvo","doi":"10.1109/ECCE.2018.8557675","DOIUrl":"https://doi.org/10.1109/ECCE.2018.8557675","url":null,"abstract":"Several stability and power quality problems have been reported recently in power systems, which experience a high penetration of power electronics converters, such as renewable energy inverters. The problems are often caused by the interaction between the converter and the grid impedance. Stability monitoring tools have been presented to gain insight into the stability margin of the power system. Online methods are most favorable since the power system has many parameters that vary with time. However, the online methods that have been presented may produce inaccurate estimate of the stability margin due to several simplifications, such as using reduced-order impedance models. This paper introduces an improved dq-domain stability analysis that takes into account the time-varying grid impedance in real time and also the multivariable inverter output impedance, including the crosscouplings.","PeriodicalId":415217,"journal":{"name":"2018 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126837623","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}
{"title":"Ageing Mitigation Control Method for Power Devices in Multilevel Inverters in Standalone PV Systems","authors":"M. Aly, E. Ahmed, M. Shoyama","doi":"10.1109/ECCE.2018.8557707","DOIUrl":"https://doi.org/10.1109/ECCE.2018.8557707","url":null,"abstract":"Multilevel inverters (MIs) have become widely used in photovoltaic (PV) systems for their high efficiency, reduced leakage currents, and reduced EMI levels. Although MIs suffer from unequal thermal stresses in power devices that lead to aging of power device with their continuous operation. Therefore, this paper proposes a new aging mitigation control (AMC) method to enhance the reliability of MIs against the aging effects in power devices. The operation of the proposed AMC method has three operating modes that are adapted according to the level and type of aging. In small and medium aging levels, the proposed method preserves the full output power ratings of the inverter with maximum energy extraction from PV modules. Whereas, in high aging level region and multiple devices failures, the proposed method reduces the output power so as to maintain continuous operation of the inverter without harmful consequences. The simulation and experimental results with comparisons to conventional methods show effective performance of the proposed AMC method.","PeriodicalId":415217,"journal":{"name":"2018 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127002698","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}
{"title":"Sensorless Harmonic Estimation for Servo Drive with Vibration Load","authors":"Ching-Lon Huang, Shih-Chin Yang, Yu-Liang Hsu","doi":"10.1109/ECCE.2018.8558228","DOIUrl":"https://doi.org/10.1109/ECCE.2018.8558228","url":null,"abstract":"This paper proposes a sensorless vibration frequency estimation for a servo control system driven by a permanent magnet (PM) synchronous machine. Traditional vibration estimation relies on the measurement using external sensors. A separated accelerometer is installed in the servo system to obtain the vibration harmonic information. Because the accelerometer must be attached on the visibly vibrational location inside the system, this vibration detection results in both installation and reliability issues. Instead of accelerometer, this paper proposes a disturbance observer to estimate the vibration harmonic using machine drive available current and position signal. A real-time signal process is developed to identify the vibration frequency from estimated harmonic. A servo system with a 400W PM machine drive is built to verify the proposed vibration frequency estimation. This paper includes the comparatively evaluation between the accelerometer-based harmonic measurement and the sensorless harmonic estimation.","PeriodicalId":415217,"journal":{"name":"2018 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114898221","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}
J. Pries, V. Galigekere, O. Onar, G. Su, R. Wiles, L. Seiber, Jonathan Wilkins, Saeed Anwar, Shenli Zou
{"title":"Coil Power Density Optimization and Trade-off Study for a 100kW Electric Vehicle IPT Wireless Charging System","authors":"J. Pries, V. Galigekere, O. Onar, G. Su, R. Wiles, L. Seiber, Jonathan Wilkins, Saeed Anwar, Shenli Zou","doi":"10.1109/ECCE.2018.8557490","DOIUrl":"https://doi.org/10.1109/ECCE.2018.8557490","url":null,"abstract":"This paper presents a trade-off study examining the impacts of modifying resonant frequency and coil current density on coil power density for a 100 kW electric vehicle charging system. We find that power density can be increased significantly by moving to higher operating frequency and current density with marginal impact to overall coil-to-coil transfer efficiency. A detailed prototype model of a 150 kVA rated coil set is presented along with loss estimates from magnetic field simulations and initial test results up to 50 kW.","PeriodicalId":415217,"journal":{"name":"2018 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115504267","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}