{"title":"Hybrid Traction Power Quality Compensation System in electrified railway for nominal rating reduction of three-phase converter power switches","authors":"Mohammad Arabahmadi, M. Banejad, A. Dastfan","doi":"10.1109/PEDSTC.2017.7910372","DOIUrl":"https://doi.org/10.1109/PEDSTC.2017.7910372","url":null,"abstract":"Since AC traction loads are usually large single-phase loads with a non-linear nature, they create power quality problems, such as high contents of Negative Sequence Current (NSC), low power factor, harmonic injection, etc. To overcome above issues, a Hybrid Traction Power Quality Compensation System (HTPQCS) based on a three-phase Full-Bridge Converter (FBC) and two Static VAR Compensators (SVCs) is proposed in this paper. The proposed structure will considerably reduce the initial investment cost of compensation system and nominal rating of FBC power switches. In this study, the FBC is used to transfer active power from one section to adjacent section and suppress harmonic currents. The SVCs are applied to compensate reactive power and suppress the third and fifth harmonic currents. In this paper firstly, the operating principle of NSC compensation is discussed step by step. Then, the proposed control strategies for SVC and FBC are presented. Finally, simulation results demonstrate the correctness and validity of the proposed structure and compensation strategy and also show that HTPQCS could compensate all power quality problems. The simulation is carried out using MATLAB/Simulink software.","PeriodicalId":414828,"journal":{"name":"2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128622292","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 new battery charger for plug-in hybrid electric vehicle application using back to back converter in a utility connected micro-grid","authors":"R. Razi, B. Asaei, M. Nikzad","doi":"10.1109/PEDSTC.2017.7910335","DOIUrl":"https://doi.org/10.1109/PEDSTC.2017.7910335","url":null,"abstract":"The major drawbacks of the most battery chargers for plug-in hybrid electric vehicle (PHEV) are high volume and weight, low power, long charging time, deleterious harmonic effects on the electric utility distribution systems and low flexibility and reliability. This paper proposes a new battery charger structure for PHEV application using back to back (B2B) converter in a utility connected micro-grid. In the proposed structure, an AC micro-grid, based on the typical household circuitry configuration, is connected to the grid via a B2B converter; and the DC link is used for battery charging. In fact, the B2B converter can provide an isolated, low cost, simple and reliable connection with power-flow management between the grid, micro-grid and battery. This proposed structure, depending on the power requirement of the vehicle, can run in four different modes: battery charging mode from the grid (G2V) or micro-grid (M2V), vehicle to grid mode (V2G) and vehicle to micro-grid mode (V2H). The feasibility of the proposed scheme has been validated in the simulation study for various operating conditions.","PeriodicalId":414828,"journal":{"name":"2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123345690","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 new high-gain coupled-inductor SEPIC converter for a microgrid system","authors":"S. Hasanpour, A. Baghramian, H. Mojallali","doi":"10.1109/PEDSTC.2017.7910340","DOIUrl":"https://doi.org/10.1109/PEDSTC.2017.7910340","url":null,"abstract":"In this paper, a new high-gain SEPIC converter with two coupled-inductors and a voltage multiplier technique is presented. This topology has high voltage gain without large duty cycle and low voltage stress across the single power switch. In the proposed converter, a high step-up voltage gain is achieved using the voltage multiplier cell. The diodes of voltage multiplier cell turn on and off under ZCS (Zero Current Switching) condition. Thus, this part of circuit has low conduction loss. All operational principles and steady state analysis in continuous conduction mode are discussed in details. Finally, the proposed converter analysis is justified using detailed simulation in MATLAB/Simulink.","PeriodicalId":414828,"journal":{"name":"2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC)","volume":"303 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114862943","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":"Reduced common-mode voltage in Z-Source Inverters","authors":"N. Noroozi, M. Zolghadri, M. Yaghoubi","doi":"10.1109/PEDSTC.2017.7910361","DOIUrl":"https://doi.org/10.1109/PEDSTC.2017.7910361","url":null,"abstract":"Z-source family has been widespread in photovoltaic (PV) applications. In trasformerless grid-connected PV systems, the common mode voltage (CMV) time variations, cause the leakage current flow. This current flows through the stray capacitance of the PV panels. For a Z-Source Inverter (ZSI), the CMV would have higher high-frequency harmonics, due to the shoot through states within the switching cycles. In this paper, the CMV of a ZSI is analyzed and a simple method is proposed for the harmonic reduction of the CMV in the ZSI. The CMV reduction method is based on changing the switching states. The CMV in reduced method is compared to the CMV in the traditional ZSI in frequency domain by using modulated Fourier transform (MFT) method. The results are verified through the simulation of a 1kw ZSI.","PeriodicalId":414828,"journal":{"name":"2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124052024","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":"Design of a constant current Load Resonant Converter using an LCLL tank with load regulation capability topologically","authors":"A. Khoshsaadat, J. Moghani","doi":"10.1109/PEDSTC.2017.7910378","DOIUrl":"https://doi.org/10.1109/PEDSTC.2017.7910378","url":null,"abstract":"In this paper an LCLL tank is presented for application in Load Resonant Converters (LRCs) with the constant current output. Design method is based on the output current independence from load variation and minimization of kVA/kW ratio of the LC tank. A 150kHz 70W LRC is presented as an experimental prototype of the design procedure. This converter has a robust load regulation, minimum reactive power and ZVS on the inverter's MOSFETs over an extended load variation without using any feedback loop. Designed converter can be used for many applications with constant current such as LED drivers and battery chargers. Also, high efficiency is achieved and transformer's parasitic elements are integrated as components of the Passive Resonant Tank (PRT). Therefore order and size of the converter is reduced in this topology.","PeriodicalId":414828,"journal":{"name":"2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126236554","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":"Direct torque control of a wind energy conversion system with permanent magnet synchronous generator and Matrix Converter","authors":"Nastaran Fazli, J. Siahbalaee","doi":"10.1109/PEDSTC.2017.7910315","DOIUrl":"https://doi.org/10.1109/PEDSTC.2017.7910315","url":null,"abstract":"This paper proposes a direct-torque control (DTC) scheme in a variable-speed direct-drive wind power generation system including a permanent-magnet synchronous generator (PMSG) and matrix converter (MC). Optimal torque control in the proposed DTC strategy is directly obtained from estimated rotor speed and is applied to the system as reference torque. Controlling generator torque at its optimal value makes maximum power point tracking (MPPT) possible under various wind speed and without the need of wind speed or rotor position sensors. The primary merits of the proposed technique are accurate and rapid response to variation of the wind speed, straightforward implementation and robustness to parameter uncertainties and variations of the PMSG. Moreover, DTC based Matrix Converter technique has lower flux and torque ripples and switching frequency as this converter is characterized with higher voltage vectors than conventional Back to Back converters. The effectiveness of the proposed DTC-MC scheme is verified by simulation studies on a 10kW PMSG wind turbine.","PeriodicalId":414828,"journal":{"name":"2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126313981","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 fast and cost-effective control of a three-phase stand-alone inverter","authors":"Neda Mazloum, Omid Keikha, M. Yaghoubi, F. Tahami","doi":"10.1109/PEDSTC.2017.7910392","DOIUrl":"https://doi.org/10.1109/PEDSTC.2017.7910392","url":null,"abstract":"This paper proposes a straightforward control method for voltage control of a three-phase transformer-based inverter in uninterruptible power supplies or distributed generation systems. The approach offers a dual-loop design consisting inner current control loop and outer voltage loop. Sliding mode current controller provides desired bandwidth for voltage controller which consists of a state feedback term for stabilization and resonant term for harmonic damping. The proposed scheme provides fast dynamic response and low total harmonic distortion even for high power inverters with the limitations of switching frequency and LC filter components. Experimental studies for 2KVA linear and nonlinear loads using digital signal processors validate excellent performance of the proposed method.","PeriodicalId":414828,"journal":{"name":"2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115748398","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 new single-stage transformerless inverter for photovoltaic applications","authors":"F. Soleimani, E. Adib, H. Farzanehfard","doi":"10.1109/PEDSTC.2017.7910338","DOIUrl":"https://doi.org/10.1109/PEDSTC.2017.7910338","url":null,"abstract":"In this paper a new single-stage transformerless inverter for photovoltaic (PV) application is proposed. Typical PV systems have multi-stage topology in order to perform different functions. These multi-stage inverters suffer from low efficiency and high components count. The proposed inverter is a combination of boost converter and half bridge inverter which can handle voltage boosting as well as feeding ac current to the grid in one stage. The introduced converter is transformerless which increases the overall efficiency and decreases cost, size and weight of the system. This topology has several desirable features like low switching losses, low total harmonic distortion (THD) and simple control technique. In this paper, operation principle, theoretical analysis and design of the proposed topology are discussed. Also, simulation and experimental results of a 100W inverter are presented to confirm the validity of theoretical analysis.","PeriodicalId":414828,"journal":{"name":"2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115887968","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":"Eccentricity fault indices in large induction motors an overview","authors":"Iman Sadeghi, H. Ehya, J. Faiz","doi":"10.1109/PEDSTC.2017.7910347","DOIUrl":"https://doi.org/10.1109/PEDSTC.2017.7910347","url":null,"abstract":"This paper reviews eccentricity fault indices in large induction motors. The most advantageous features that have been widely used for eccentricity fault detection is introduced and impacts of load variations and power supply harmonics is also studied. Three different method based on thermal, vibration and electromagnetic field signal are presented and electrical signal chosen due to its non-invasive nature. Eccentricity is categorized into 6 groups and their competency are compared to each other.","PeriodicalId":414828,"journal":{"name":"2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132070162","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}
Alireza Hadizadeh, H. Iman‐Eini, S. Farhangi, Milad Soleimani, J. Faiz
{"title":"A new control method for improving the performance of Modular multilevel converter","authors":"Alireza Hadizadeh, H. Iman‐Eini, S. Farhangi, Milad Soleimani, J. Faiz","doi":"10.1109/PEDSTC.2017.7910346","DOIUrl":"https://doi.org/10.1109/PEDSTC.2017.7910346","url":null,"abstract":"One of the main challenges in the control of modular multilevel converters (MMC) is reducing circulating currents and keeping sub-modules capacitors voltage regulated. This paper introduces a method which controls the voltage and current simultaneously by controlling the reference values using the equations of the MMC and genetic optimization algorithm. The proposed method controls the converter by adding the second harmonic component of the reference waveform, then calculating the working condition to reach the minimum circulating current and voltage ripples. The method is verified using MATLAB Simulink.","PeriodicalId":414828,"journal":{"name":"2017 8th Power Electronics, Drive Systems & Technologies Conference (PEDSTC)","volume":"84 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131726534","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}