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Design and FEM analysis of dual excited synchronous generator 双励磁同步发电机设计与有限元分析
2017 National Power Electronics Conference (NPEC) Pub Date : 2017-12-01 DOI: 10.1109/NPEC.2017.8310475
A. A. Reddy, S. Bhat, R. Ugale
{"title":"Design and FEM analysis of dual excited synchronous generator","authors":"A. A. Reddy, S. Bhat, R. Ugale","doi":"10.1109/NPEC.2017.8310475","DOIUrl":"https://doi.org/10.1109/NPEC.2017.8310475","url":null,"abstract":"A dual excited synchronous generator (DESG) is basically having two windings on rotor which are 90 degree apart electrically. Keeping two windings on rotor gives the advantage of control of rotor angle and voltage independently. Most of the work presented till now covers the stability analysis of DESG using mathematical model. However, this paper presents, the finite element method (FEM) analysis of DESG and its constructional design in which both the field windings are placed neither on d-axis nor on q-axis. Magnetic field flux distribution and a simple transient analysis of conventional synchronous generator (CSG) and DESG connected to a 3-phase R-L load with a step change in both field excitations at different instants of time is studied and results are presented here.","PeriodicalId":125885,"journal":{"name":"2017 National Power Electronics Conference (NPEC)","volume":"1997 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117026611","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
Analysis of quasi Y source inverter with maximum boost control technique 拟Y源逆变器最大升压控制技术分析
2017 National Power Electronics Conference (NPEC) Pub Date : 2017-12-01 DOI: 10.1109/NPEC.2017.8310428
Pravin B Borkar, A. Chowdhury
{"title":"Analysis of quasi Y source inverter with maximum boost control technique","authors":"Pravin B Borkar, A. Chowdhury","doi":"10.1109/NPEC.2017.8310428","DOIUrl":"https://doi.org/10.1109/NPEC.2017.8310428","url":null,"abstract":"This paper presents the analysis of Maximum Boost control technique of Quasi Y source inverter. The technique uses shoot through states in inverter to achieve higher voltage boost. The control technique has been analyzed for voltage gain and its variation with modulation index, voltage stresses and nature of input current. A third harmonic injection method in maximum boost control has also been analyzed which further improves performance of inverter. A hardware prototype has been implemented to verify the simulated result.","PeriodicalId":125885,"journal":{"name":"2017 National Power Electronics Conference (NPEC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124667432","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
Operation and control of smart transformer based distribution grid in a microgrid system 微电网系统中基于智能变压器的配电网运行与控制
2017 National Power Electronics Conference (NPEC) Pub Date : 2017-12-01 DOI: 10.1109/NPEC.2017.8310448
Dwijasish Das, Chandan Kumar
{"title":"Operation and control of smart transformer based distribution grid in a microgrid system","authors":"Dwijasish Das, Chandan Kumar","doi":"10.1109/NPEC.2017.8310448","DOIUrl":"https://doi.org/10.1109/NPEC.2017.8310448","url":null,"abstract":"The smart transformer (ST) has been studied extensively in recent years exploring its capabilities in the modern electric grid. Concentrating on the low voltage (LV) side of an ST, this paper proposes a grid structure where a photovoltaic (PV) system and battery energy storage system (BESS) are interfaced to the ST LV DC link. The LV AC grid consists of AC loads and a microgrid with a PV unit and DC loads. Investigation is done on how an ST can achieve proper power management, in addition to carrying out the functions of a conventional transformer on the LV side. A PSCAD simulation of the proposed grid structure is carried out and the operation of the system in the various power flow scenarios is verified. The paper also emphasizes the capability of ST to eliminate the need of other power quality improvement devices in the distribution grid by maintaining the appropriate voltages in the LV grid.","PeriodicalId":125885,"journal":{"name":"2017 National Power Electronics Conference (NPEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129858907","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: 4
A PV fed DC-DC converter for switched reluctance motor driven agriculture pump 一种用于开关磁阻电机驱动农业泵的光伏供电DC-DC变换器
2017 National Power Electronics Conference (NPEC) Pub Date : 2017-12-01 DOI: 10.1109/NPEC.2017.8310427
A. Mishra, Bhim Singh
{"title":"A PV fed DC-DC converter for switched reluctance motor driven agriculture pump","authors":"A. Mishra, Bhim Singh","doi":"10.1109/NPEC.2017.8310427","DOIUrl":"https://doi.org/10.1109/NPEC.2017.8310427","url":null,"abstract":"The present paper aims to integrate photovoltaic (PV) system along with a DC-DC converter to develop an efficient switched reluctance motor (SRM) driven agriculture pumping system. The proposed DC-DC converter helps in the minimization in the size of an input PV capacitor and ripples in PV current. The motor speed is skillfully adjusted by controlling the DC link voltage across split-capacitors of the midpoint converter of 4-phase SRM. It helps to eliminate the voltage and current sensors required on the motor side. The CCM (Continuous Current Mode) operation of the DC-DC converter supports to minimize the stresses on its components and to improve its conversion performance. The smooth control with reduced initial winding currents are also accomplished via perturbation size and angle control of SRM. The suitability of system is authenticated by both Matlab model response and experimental test results.","PeriodicalId":125885,"journal":{"name":"2017 National Power Electronics Conference (NPEC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128686097","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
Fault-tolerant operation of nine-level hybrid symmetric cascaded multilevel converter 九电平混合对称级联多电平变换器的容错操作
2017 National Power Electronics Conference (NPEC) Pub Date : 2017-12-01 DOI: 10.1109/NPEC.2017.8310457
I. Sarkar, B. G. Fernandes
{"title":"Fault-tolerant operation of nine-level hybrid symmetric cascaded multilevel converter","authors":"I. Sarkar, B. G. Fernandes","doi":"10.1109/NPEC.2017.8310457","DOIUrl":"https://doi.org/10.1109/NPEC.2017.8310457","url":null,"abstract":"Cascaded H-bridge multilevel converters are well-established solution for high power medium voltage industrial applications. However, the reliability of these converters is affected by the use of large number of power semiconductor devices. Fault-tolerant strategies improve reliability as well as availability of these converters by ensuring its operation even under device fault conditions. In this paper, the fault-tolerant operation of nine-level hybrid symmetric cascaded multilevel converter is explored for open- and short-circuit fault conditions. The converter operation is first analysed for the open-circuit fault condition. The converter reconfiguration and converter operations are then explained for short-circuit fault condition using neutral-shift and rebalancing fault tolerant strategies. The effectiveness of these techniques are then validated through simulation and experimental results.","PeriodicalId":125885,"journal":{"name":"2017 National Power Electronics Conference (NPEC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128735188","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
Design, analysis, fabrication and practical testing of a lab developed power converter prototype in electric arc welding 实验室研制的电弧焊电源变换器样机的设计、分析、制造和实际测试
2017 National Power Electronics Conference (NPEC) Pub Date : 2017-12-01 DOI: 10.1109/npec.2017.8310446
Abhishek Kar, A. Nanda, M. Sengupta
{"title":"Design, analysis, fabrication and practical testing of a lab developed power converter prototype in electric arc welding","authors":"Abhishek Kar, A. Nanda, M. Sengupta","doi":"10.1109/npec.2017.8310446","DOIUrl":"https://doi.org/10.1109/npec.2017.8310446","url":null,"abstract":"This paper presents design, parameter evaluation, fabrication and testing of an input power factor corrected phase modulated resonant transition converter(PMRTC) for electric arc welding. A power factor correcting boost (PFC-boost) converter is connected at the front end of PMRTC to improve its input power factor closer to unity. PMRTC is a full bridge isolated DC-DC resonant converter whose output voltage is controlled by using phase shift PWM technique. The switching devices of the PMRTC are turned-ON with zero voltage across it. This minimizes total switching loss and improves efficiency. The switching frequency of the PMRTC is kept high (μ 50kHz) so that the size of the isolation transformer is reduced. Both the converters are designed, analysed, fabricated and tested separately and thereafter connected in cascade. Practical welding operation at 2.5 kW, 100 A is carried out with the cascaded converter and the experimental results are presented. The effect of sudden loading on output voltage of PFC-boost is also practically observed. The experimentally obtained results are found to be in excellent agreement with the simulated results. This upholds the accuracy of the work.","PeriodicalId":125885,"journal":{"name":"2017 National Power Electronics Conference (NPEC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126206741","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: 3
Mission profile based evaluation of capacitor reliability in two stage grid feeding photovoltaic inverter 基于任务剖面的两级并网光伏逆变器电容器可靠性评估
2017 National Power Electronics Conference (NPEC) Pub Date : 2017-12-01 DOI: 10.1109/NPEC.2017.8310426
Sagar Narale, P. N. Kumar, Md. Waseem Ahmad, D. More, S. Anand
{"title":"Mission profile based evaluation of capacitor reliability in two stage grid feeding photovoltaic inverter","authors":"Sagar Narale, P. N. Kumar, Md. Waseem Ahmad, D. More, S. Anand","doi":"10.1109/NPEC.2017.8310426","DOIUrl":"https://doi.org/10.1109/NPEC.2017.8310426","url":null,"abstract":"A two-stage, single phase grid-connected photo-voltaic (PV) inverter requires Aluminum Electrolytic Capacitors (AECs) at PV terminal and dc-link of the inverter. These capacitors are subjected to different stress due to change in operating conditions. This results in degradation in their performance, leading to failure. This paper analyzes and identifies the degradation of both of these AECs based on physics of failure approach when subjected to mission profile data. Solar radiation and temperature at IIT-Kanpur (26.4499°N, 80.3319°E) for 1 month are used to generate mission profile. The suggested algorithm predicts the operational life of both the AECs. It is found that the AEC used at dc-link of the inverter faces higher stress, thereby leading to early failure as compared to AEC used at PV terminal in the two stage, single phase inverter.","PeriodicalId":125885,"journal":{"name":"2017 National Power Electronics Conference (NPEC)","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134371164","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
An approach for vibration quantification in SRM for design studies 用于设计研究的SRM振动量化方法
2017 National Power Electronics Conference (NPEC) Pub Date : 2017-12-01 DOI: 10.1109/NPEC.2017.8310429
Arun Chithrabhanu, K. Vasudevan
{"title":"An approach for vibration quantification in SRM for design studies","authors":"Arun Chithrabhanu, K. Vasudevan","doi":"10.1109/NPEC.2017.8310429","DOIUrl":"https://doi.org/10.1109/NPEC.2017.8310429","url":null,"abstract":"It is well accepted that the primary source of acoustic noise in SRM is the stator deformations caused due to radially acting electromagnetic forces. Much effort has been reported in literature towards experimental determination of forces and Finite Element (FE) based models for the motor for study of electromagnetic and mechanical aspects. Several research works also propose approaches towards minimizing torque ripple and radial forces. An index to quantify the deformation that occur in an SRM that will enable comparison of various approaches to reduce vibrations is very much desirable. Towards this end, this paper proposes RMS displacement as a figure of merit, arrived at from a combination of circuit simulation and finite element studies. The approach used is computationally less intensive and is useful for estimating the performance of methods like Torque Sharing Function (TSF) usage. In this paper, a cosine TSF is used to demonstrate the suitability of the proposed index using this approach.","PeriodicalId":125885,"journal":{"name":"2017 National Power Electronics Conference (NPEC)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134190827","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
Modified predictive sorting algorithm for full-bridge MMC in HVDC application 改进的全桥MMC预测排序算法在高压直流中的应用
2017 National Power Electronics Conference (NPEC) Pub Date : 2017-12-01 DOI: 10.1109/NPEC.2017.8310455
Teja Bandaru, T. Bhattacharya, D. Chatterjee
{"title":"Modified predictive sorting algorithm for full-bridge MMC in HVDC application","authors":"Teja Bandaru, T. Bhattacharya, D. Chatterjee","doi":"10.1109/NPEC.2017.8310455","DOIUrl":"https://doi.org/10.1109/NPEC.2017.8310455","url":null,"abstract":"High-voltage direct current (HVDC) transmission application necessitates the use of high voltage rating IGBTs in modular multi-level converters (MMC). This makes the use of pulse width modulation (PWM) infeasible, since the frequency rating of the high voltage switches available in the market is very low. The natural alternative is the use ofnearest level control (NLC) methods, where the submodules (SM) are switched in/out in the MMC arms depending on a sorting algorithm based on the SM capacitor voltages and arm currents. However, the conventional sorting algorithm either fails to provide a tight grip on the capacitor voltages or does that at the cost of a switching frequency much higher than the fundamental. The predictive sorting algorithm (PSA), used for half-bridge MMCs, is one method which helps to achieve a compromise between the two. For HVDC application, though, the MMC may consist of full bridges (FB) in order to handle DC faults. Hence this paper proposes an extension of the PSA for its use in full-bridge MMC (FB-MMC). The modified algorithm is tested on a FB-MMC based HVDC test system and a comparison of the switching frequency patterns obtained with this method with that of the conventional sorting method is presented. The effectiveness of the proposed modified algorithm is tested by subjecting the MMC to changes in power flow directions and reduction in DC voltage. The simulations are performed in PSCAD/EMTDC platform.","PeriodicalId":125885,"journal":{"name":"2017 National Power Electronics Conference (NPEC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121103020","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: 4
Analysis and experimental verification of three-coil inductive resonant coupled wireless power transfer system 三圈电感谐振耦合无线电力传输系统的分析与实验验证
2017 National Power Electronics Conference (NPEC) Pub Date : 2017-12-01 DOI: 10.1109/NPEC.2017.8310439
K. Kiran, M. Kumari, R. Behera, O. Ojo, A. Iqbal
{"title":"Analysis and experimental verification of three-coil inductive resonant coupled wireless power transfer system","authors":"K. Kiran, M. Kumari, R. Behera, O. Ojo, A. Iqbal","doi":"10.1109/NPEC.2017.8310439","DOIUrl":"https://doi.org/10.1109/NPEC.2017.8310439","url":null,"abstract":"In this paper, the basic principle of Wireless Power Transfer (WPT) based on resonance in magnetically coupled coils is described with detailed theoretical analysis of concepts. A novel approach of WPT is proposed using an additional coil between the main transmitter and receiver to enhance the transfer efficiency. The design process for the proposed WPT system is detailed, together with experimental investigation. Output voltages waveforms are presented for variable distances. Frequency domain analysis has been carried out for resonant frequency analysis and detection. It is observed that by using an intermediate coil between the transmitter and receiver coils, almost doubles the output voltage and improves the efficiency by more than four times of a two coil system. The effect of variable capacitors in the intermediate coil on the output voltage at different distances is experimented and founded that using a proper capacitor is required to achieve higher voltages. The output voltage can even be doubled if we use a proper capacitor.","PeriodicalId":125885,"journal":{"name":"2017 National Power Electronics Conference (NPEC)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121961976","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: 7
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