{"title":"Modified model reference adaptive observer for rotor speed and position estimation in wound rotor induction machine","authors":"R. Nair, G. Narayanan","doi":"10.1109/APPEEC.2017.8309007","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8309007","url":null,"abstract":"Sensorless estimation of rotor speed and position has numerous advantages in terms of maintenance, cost, robustness and cabling requirements. The existing Model Reference Adaptive System (MRAS) observer considers the cross-product of estimated and actual rotor current vectors as the error input to the PI controller. This results in a non linear plant model, necessitating the use of small signal analysis for controller design. The modified MRAS observer presented here results in a linear plant model, enabling straight-forward design of PI controller and also resulting in improved performance. Simulation and experimental results, presented on a 10-HP Wound Rotor Induction Machine (WRIM), driven by a Squirrel Cage Induction Motor (SCIM) clearly bring out the superior dynamic performance of the modified estimation scheme over the existing scheme. The problem of integrator drift is also addressed in the hardware implementation.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126589167","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 hybrid controller design for VSC-HVDC transmission system for PMSG based offshore wind farm","authors":"Ramu Srikakulapu, U. Vinatha","doi":"10.1109/APPEEC.2017.8309000","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8309000","url":null,"abstract":"Permanent magnet synchronous generator (PMSG) based offshore wind farm is connected to the onshore grid by voltage source converter (VSC) — HVDC link. The wind farm side VSC controls the AC voltage, and grid side VSC controls the reactive power and DC link voltage. This paper presents a non-linear control method for improving the robustness of the controller for VSC-HVDC link. A hybrid controller is designed using sliding mode control (SMC) and proportional-integral (PI) control. Mathematical modeling of the hybrid controller is presented. This hybrid controller has the capability of Fault Ride-Through and transient stability of VSC-HVDC link. This hybrid controller is simulated using the MATLAB/Simulink software and it is observed that the controller provides better performance. Transient stability is ensured by creating a symmetrical fault at the grid side in the simulation.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"19 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132547127","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":"Optimal distributed generation placement using hybrid technique","authors":"K. M. L. Prasanna, Amit Jain, R. J. R. Kumar","doi":"10.1109/APPEEC.2017.8309008","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8309008","url":null,"abstract":"Incorporation of distributed generation (DG) units energized by renewable energy resources (especially wind and solar) at distribution level have generated a greater interest in the recent years. Power loss reduction and voltage profile improvement are the main concern for distributed generator integration. Most of the methods for optimal generation placement using analytical and particle swarm optimization (PSO), computes the active power injection such that the objective function is obtained. In this paper, a new hybrid technique has been proposed for placing distributed generation with optimal power injections on power distribution systems for loss reduction. The active power injection from distributed generator is obtained using particle swarm optimization and reactive power injection is obtained by summing up the reactive loads and losses of all the branches fed by the distributed generator. This hybrid technique has been tested on IEEE 33 bus system and results are presented.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133233937","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 & development of a new electrical distribution system for household connections","authors":"Ishant Jain, E. Reddy","doi":"10.1109/APPEEC.2017.8309016","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8309016","url":null,"abstract":"Present household connections demand an improved and continuous power supply. Present concept features a technologically improved version of distribution boxes in low voltage line with reduced I2R losses and tamper proof for prevention of power theft. In this paper a novel concept of box less distribution box, termed as distribution block, is represented with a snap fit bus bar casing, for tamperproof, a connector design with a minimum contact resistance of 0.07 ohms and within a cost of 6$ having lowest number of components for ease of manufacturability.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115582475","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":"2-Terminal hybrid HVDC cost effective alternatives for clearing temporary DC line faults","authors":"M. Andersson, Xiaobo Yang, Chunming Yuan","doi":"10.1109/APPEEC.2017.8308908","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308908","url":null,"abstract":"2-Terminal Hybrid HVDC consisting of a Line-Commutated Converter (LCC) in the sending end, and a Voltage Source Converter (VSC) in the receiving end, can be seen as a compromise between cost, loss and performance. A Hybrid system has lower cost and somewhat lower losses than a pure VSC HVDC system. Yet it is able to provide reactive power support and black start capability at the receiving end, which a pure LCC system simply cannot. The focus of this paper is DC fault handling. Two ways of clearing DC faults are investigated and compared, namely AC breaker and Diode. Improvements to the AC breaker alternative are made, which lowers transient DC overvoltage. Two control modes are also compared, namely LCC controlling current, and LCC controlling voltage. It is shown that both control modes are feasible, during steady state operation and also during transients.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125325726","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":"Backward sweep technique based phase balancing algorithm for secondary distribution system","authors":"Swapna Mansani, U. Yaragatti","doi":"10.1109/APPEEC.2017.8308968","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308968","url":null,"abstract":"In secondary power distribution networks, unbalanced loads and feeder laterals result in poor power quality and increased operating costs. Reconfiguration of feeders and phase swapping continues to be the most prominent techniques. In this paper, an algorithm that caters for unbalance in both three-phase and two-phase feeder laterals is discussed. Phase balancing computation is done using both average load per phase and average load per service. This algorithm embeds the rephasing of three-phase along with single-phase consumer service laterals/service wire at each Bus from the tail end of the feeder to its origin, thereby enabling reduction of current in all heavily loaded branches at each Bus. To illustrate the effectiveness of the proposed technique IEEE 13 Bus test feeder is considered.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115367151","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":"Multi-carrier pulse width modulation for multimodular matrix converter","authors":"Payal T. Patel, M. Mulla","doi":"10.1109/APPEEC.2017.8308900","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308900","url":null,"abstract":"This paper presents multi-carrier based pulse width modulation scheme for multimodular matrix converter (MMMC). Presented work proves full bridge indirect matrix converter (FIMC) topology as the subset of 3 × 1 modular (MMMC) and thereby any modulation scheme suitable for FIMC topology can be reproduced for MMMC topologies. First the functional similarity between FIMC topology and fundamental MMMC topology is proved. Using this similarity the modulation scheme is derived for fundamental MMMC topology from the one which is suitable for FIMC topology. Well known multi-carrier modulation method, phase shifted (PS) method, is utilized to extend this scheme to 3 × N modular MCs (MMMC) which equally distributes the power among all power modules of the converter. Modulation scheme is verified by simulation in PSIM software and is analyzed based on output voltage magnitude, frequency and input current THD.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126938277","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":"Effect of duty ratio on fuel cell ripple current, power losses and converter efficiency","authors":"M. Naik, P. Samuel","doi":"10.1109/APPEEC.2017.8308960","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308960","url":null,"abstract":"The duty cycle of the switch impacts the Fuel Cell (FC) ripple current and the efficiency of the converter. To analyze the effect of duty cycle on FC ripple current and efficiency of the DC-DC converter, a (Polymer Electrolyte Membrane Fuel Cell)PEMFC stack of rating 24 kW, 180 V is considered as input supply source incorporated with the multi device multi-phase interleaved boost converter (MDMPIBC) converter. The converter switches are operated with various duty cycles 0.25, 0.35 and 0.55. The FC ripple content and converter efficiency for different duty ratios are evaluated with the help of simulation wave forms. For each duty cycle the input current ripple and I/O power of converter is plotted and measured. The comparisons for various duty cycles are given with respect to FC ripple current, converter power losses and efficiency. The study shows that the optimum duty cycle for the converter is 0.25.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132472676","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":"Traveling wave based fault location of multi-terminal transmission lines","authors":"Suraj Sawai, A. Pradhan, O. Naidu","doi":"10.1109/APPEEC.2017.8308976","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308976","url":null,"abstract":"This paper presents a travelling wave based fault location method for multi-terminal line using all end synchronised data. A sequence filter is used for extraction of traveling wave from fault voltage and current signals and subsequal determination of arrival time of traveling wave at relay end. In the proposed algorithm, using the first surge arrival time of traveling wave at each bus, fault distances are calculated. Fault distances are further modified on same reference bus and fault distance matrix is formed and used for faulted section identification and exact location of fault. The method is tested for multi-terminal lines including a practical grid using PSCAD simulated data. The obtained results show that calculated fault location is not affected by the fault type, fault resistance and noise in the measured signal.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130085192","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":"Differential mode gamma source inverter with reduced switching stresses","authors":"Reddiprasad Reddivari, D. Jena","doi":"10.1109/APPEEC.2017.8308937","DOIUrl":"https://doi.org/10.1109/APPEEC.2017.8308937","url":null,"abstract":"Impedance source inverters are covered with entire spectrum of power conversion process (dc-dc, dc-ac, ac-dc, and ac-ac). The traditional impedance source inverter suffers from high switching stresses and poor efficiency during high boost requirements. Compared to traditional impedance source inverters, the transformer based impedance source inverters are able to boost the output voltage gain and modulation index simultaneously with reduced passive components. The applications of transformer based gamma source impedance inverters are limited due to the difficulty in maintaining tight coupling, high instantaneous currents, increasing turn's ratio, high cost and large size. However, the gamma source inverter increases voltage gain by reducing turns ratio. This paper presents the operational modes of gamma source inverter in electric and magnetic domains, which helps the researchers to understand effects of transformer coupling in converter performance. In addition, the differential mode gamma source inverter is proposed that reduces the switching stresses. The operating principles of the proposed converter have been analyzed mathematically. Finally the theoretical analysis of proposed impedance inverter is validated by using MATLAB/SIMULINK.","PeriodicalId":247669,"journal":{"name":"2017 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130831913","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}