Relevant bibliographies by topics / Line-commutated inverters

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  2. Dissertations / Theses
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  4. Conference papers

Academic literature on the topic 'Line-commutated inverters'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Line-commutated inverters"

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Shadab, Mirza Mohammad, Mohammad Arifuddin Mallick, Mohammad Tufail, and M. S. Jamil Asghar. "Development of a Novel Three Phase Grid-Tied Multilevel Inverter Topology." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 3 (September 1, 2016): 826. http://dx.doi.org/10.11591/ijpeds.v7.i3.pp826-834.

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The conventional line-commutated ac-to-dc converters/ inverters have square-shaped line current. It contains higher-order harmonics which generates EMI and it causes more heating of the core of distribution or power transformers. PWM based inverters using MOSFET/IGBT have higher switching losses, and the power handling capability and reliability are quite low in comparison to thyristors/ SCR. A thyristor based forced commutated inverters are not suitable for PWM applications due to the problems of commutation circuits. A pure sinusoidal voltage output or waveform with low harmonic contents is most desirable for ac load using dc to ac conversion. This paper presents a new multilevel inverter topology in which three phase ac- to-dc converter circuits are used in inversion mode by controlling the switching angle. Due to natural commutation, no separate circuit is required for synchronization. In this paper simulation and analysis are done for grid-tied three-phase 6-pulse, Two three-phase, 3-pulse and 12-pulse converter. These converters are analysed for different battery voltage and different switching angle combinations in order to reduce the total harmonic distortion (THD). Three-phase harmonic filters are further added to the grid side to reduce the harmonic content in the line current. A comparative study of these converters is also presented in this paper.
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Brighenti, Lucas, Alessandro Batschauer, and Marcello Mezaroba. "Line-commutated Inverters Associated To A Multi-pulse Autotransformer To Photovoltaic Generation." Eletrônica de Potência 21, no. 3 (September 1, 2016): 200–211. http://dx.doi.org/10.18618/rep.2016.3.2602.

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Oni, Oluwafemi E., Andrew G. Swanson, and Rudiren Pillay Carpanen. "Line Commutated Converter Response during Total and Partial De-Blocking of a Bipolar MTDC System." International Journal of Engineering Research in Africa 52 (January 2021): 49–61. http://dx.doi.org/10.4028/www.scientific.net/jera.52.49.

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This paper focuses on the fault blocking analysis and operational issues associated with MTDC systems incorporated in an AC network. The dynamic modelling of a line-commutated converter based bipolar multi-terminal direct current (LCC MTDC) system are shown, and the dynamic response of the converter during a DC converter fault is discussed. The converter controller design for both rectifiers and the inverters system was modelled for a realistic active power and extinction angle (γ) control with consideration to the VI characteristics of all the converter stations. An overall power controller was modelled for both converter pole. Two operational scenarios of converter fault were simulated using PSCAD EMTDC. The converter firing angle and extinction angle, as well as the voltage-dependent current order limiter, was monitored and plotted on a graph. Results show that the MTDC link became unstable during the full deblocking stage with a continuous occurrence of commutation failure. Furthermore, the results presented in this paper show that during partial converter de-blocking showed a favourable performance, as the power system remains stable and commutation failure of the MTDC system is prevented.
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He, Xiuqiang, Hua Geng, Geng Yang, and Xin Zou. "Coordinated Control for Large-Scale Wind Farms with LCC-HVDC Integration." Energies 11, no. 9 (August 23, 2018): 2207. http://dx.doi.org/10.3390/en11092207.

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Wind farms (WFs) controlled with conventional vector control (VC) algorithms cannot be directly integrated to the power grid through line commutated rectifier (LCR)-based high voltage direct current (HVDC) transmission due to the lack of voltage support at its sending-end bus. This paper proposes a novel coordinated control scheme for WFs with LCC-HVDC integration. The scheme comprises two key sub-control loops, referred to as the reactive power-based frequency (Q-f) control loop and the active power-based voltage (P-V) control loop, respectively. The Q-f control, applied to the voltage sources inverters in the WFs, maintains the system frequency and compensates the reactive power for the LCR of HVDC, whereas the P-V control, applied to the LCR, maintains the sending-end bus voltage and achieves the active power balance of the system. Phase-plane analysis and small-signal analysis are performed to evaluate the stability of the system and facilitate the controller parameter design. Simulations performed on PSCAD/EMTDC verify the proposed control scheme.
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Chakraborty, Tapan Kumar. "Experimental Investigations of the Self-Controlled Synchronous Motor Connected to a Three-Phase Line Commutated SCR Inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 1 (March 1, 2016): 1. http://dx.doi.org/10.11591/ijpeds.v7.i1.pp1-6.

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<p>This paper concerns the experimental investigations of the three-phase line commutated SCR inverter fed synchronous motor. The fabricated system consists of a line-commuted inverter, a three-phase synchronous motor with the excitation winding connected in series to the inverter input, a terminal voltage sensor and a gate-pulse generating circuit. The firing pulses for SCRs of the inverter are generated by the microprocessor in proper sequence with the help of synchronizing signal derived from the terminal voltages of the synchronous machine. The steady state performance characteristics are obtained experimentally using the fabricated system. The experimental results show that a three-phase synchronous motor supplied by a line commutated inverter with the excitation winding connected in series to the dc link provide excellent characteristics of the conventional dc series motor.</p>
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Ismayil, C., and M. Nanda Kumar. "Novel Scheme to Improve Power Factor of Slip Energy Recovery Drive by Selective Harmonic Elimination." International Journal of Emerging Electric Power Systems 15, no. 4 (August 1, 2014): 367–75. http://dx.doi.org/10.1515/ijeeps-2013-0122.

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Abstract In this paper, the harmonic analysis of inverter voltage of a slip energy recovery drive (SERD) is carried out and proposes a novel approach to improve the supply side power factor of the overall drive system. The proposed model is a self-commutated SERD using IGBT inverter, and a modulation technique called selective harmonic elimination (SHE) is applied to improve the supply side power factor. The complete solutions for switching patterns to eliminate the fifth and seventh harmonics are developed using genetic algorithm. SHE method is simulated in semi-open-loop mode, and the power factor of the drive is compared with conventional line commutated thyristor inverter-based SERD. Simulations have been carried out in Matlab/Simulink environment to predetermine the performance of the drive, and results show a significant improvement in the input power factor of the drive.
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Antar, Rakan Khalil, Basil Mohammed Saied, and Rafid Ahmed Khalil. "Power Quality Improvement of High Voltage DC Link using Modified Shunt Active Power Filter." Al-Kitab Journal for Pure Sciences 1, no. 1 (June 17, 2018): 54–66. http://dx.doi.org/10.32441/kjps.v1i1.91.

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A new control strategy for active power filters is proposed, modeled and implemented in order to improve the power quality of a line commutated converter High voltage DC link. The ability of reactive power and harmonics reductions are generally met by using passive and active power filters. In this paper, modified active power filter with a modified harmonics pulse width modulation algorithm is used to minimize the source harmonics and force the AC supply current to be in the same phase with AC voltage source at both sending and receiving sides of a line commutated converter high voltage DC link. Therefore, it is considered as power factor corrector and harmonics eliminator with random variations in the load current. The modified harmonics pulse width modulation algorithm is applicable for active power filter based on a three-phase five-level and seven-level cascaded H-bridge voltage source inverter. Simulation results show that the suggested modified multilevel active power filters improve total harmonics distortion of both voltage and current with almost unity effective power factor at both AC sides of high voltage DC link. Therefore, modified active power filter is an effective tool for power quality improvement and preferable for line commutated converter high voltage DC link at different load conditions.
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Wasynczuk, O. "Modeling and dynamic performance of a line-commutated photovoltaic inverter system." IEEE Transactions on Energy Conversion 4, no. 3 (1989): 337–43. http://dx.doi.org/10.1109/60.43233.

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Wasynczuk, O. "Modeling and Dynamic Performance of a Line-Commutated Photovoltaic Inverter System." IEEE Power Engineering Review 9, no. 9 (1989): 35–36. http://dx.doi.org/10.1109/mper.1989.4310947.

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Hayanose, Nobuhiko, Motoo Ishikawa, and Juro Umoto. "Behavior of open-cycle disk MHD generator loading with line-commutated inverter." IEEJ Transactions on Power and Energy 108, no. 10 (1988): 459–66. http://dx.doi.org/10.1541/ieejpes1972.108.459.

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Dissertations / Theses on the topic "Line-commutated inverters"

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Brighenti, Lucas Lapolli. "Inversores não autônomos associados a um autotransformador multipulsos para geração fotovoltaica." Universidade do Estado de Santa Catarina, 2014. http://tede.udesc.br/handle/handle/1874.

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Made available in DSpace on 2016-12-12T17:38:33Z (GMT). No. of bitstreams: 1 Lucas Lapolli Brighenti.pdf: 3144485 bytes, checksum: ef4bec6685acef1329cfcdfd36c9e40e (MD5) Previous issue date: 2014-12-08
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The goal of this work is to present an alternative solution for processing the energy obtained in the photovoltaic cogeneration. The standards associate with the connection of inverters with the distribution grid for this application allow the use of non-isolated systems, such as line commutated inverters, associated to an autotransformer with differential connections forming a non-isolated multipulse converter. Therefore the energy delivered to the grid have low current harmonic distortion, besides a system high efficient, extremely robust, able to process great quantity of power at a lower cost than the high frequency commutated converters. It is possible to control the average voltage in connection with photovoltaic panels through the firing angle of the SCRs. This way, it is possible to do the maximum power point tracking without any additional converter for this purpose. The objective of this converter is to use in isolated and desert locations to large sized installation without frequent maintenance. The elements of the converter are already naturally robust and consolidated technologies, assuring a high reliability to the system and reduced costs. The results of a reduced scale prototype with maximum power of 2.3 kVA are presented. One of the main characteristics is the high efficiency even at low power. One of the main factors of this high efficiency and low cost is the use of the autotransformer, that processes only 22% of the total power provided by the photovoltaic panels.
Este trabalho tem o objetivo de apresentar uma solução alternativa para o processamento da energia obtida na cogeração fotovoltaica. As normas referentes à conexão de inversores para esta aplicação com a rede de distribuição permitem o uso de sistemas não isolados, sendo assim, é resgatado o uso de inversores não autônomos, associando-os a um autotransformador com conexões diferenciais formando assim um conversor multipulsos não isolado. Desta forma, a energia entregue à rede possui baixa distorção harmônica na corrente, além de ser um sistema com alta eficiência, extremamente robusto e capaz de processar grande quantidade de potência a um custo inferior aos conversores comutados em alta frequência. É possível controlar a tensão média em que os painéis fotovoltaicos são conectados através do ângulo de disparo dos tiristores, desta forma é possível fazer o rastreamento do ponto de máxima potência sem a necessidade de um conversor dedicado a isto. O objetivo deste conversor é usá-lo em locais ermos e desérticos para fazer uma instalação de grande porte sem a necessidade de manutenção frequente. Os elementos que compõe o conversor já são naturalmente robustos e de tecnologias bem consolidadas, garantindo uma alta confiabilidade ao sistema e custo reduzido. São apresentados os resultados de um protótipo em escala reduzida com potência máxima de 2,3 kVA, sendo que uma das características principais deste conversor é a alta eficiência mesmo para baixas potências. Um dos fatores primordiais para obter esta alta eficiência e baixo custo é a utilização do autotransformador que processa apenas 22% da potência total fornecida pelos painéis.
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Murray, Nicholas John. "Flexible Power control in Large Power Current Source Conversion." Thesis, University of Canterbury. Electrical and Computer Engineering, 2008. http://hdl.handle.net/10092/2610.

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This thesis describes a new concept, applicable to high-power current-sourced conversion (CSC), where a controllable firing-angle shift is introduced between series and parallel converters to enable independent active and reactive power control. The firing-shift concept solves a difficult problem, by giving thyristor based CSCs the control flexibility of pulse-width modulated (PWM) converters, but without a loss in efficiency or rating. Several configurations are developed, based on the firing-shift concept, and provide flexible, efficient solutions for both very high power HVDC transmission, and very high current industrial processes. HVDC transmission configurations are first developed for 4-quadrant high-pulse operation, based on the series connected multi-level current reinjection (MLCR) topology. Independent reactive power control between two ends of an HVDC link are proven under firing-shift control, with high-pulse operation, and without on-load tap changing (OLTC) transformers. This is followed by application of firing-shift control to a bi-directional back-to-back HVDC link connecting two weak systems to highlight the added dc voltage control flexibility of the concept. The fault recovery capability of an MLCR based ultra-HVDC (UHVDC) long distance transmis-sion scheme is also proven under firing-shift control. The scheme responds favourably to both ac disturbances and hard dc faults, without the risk of commutation failures and instability experienced during fault recovery of line-commutated conversion. The two-quadrant capability of very high current rectification is also proven with configurations based on phase-shifted 12-pulse and MLCR parallel CSCs. The elimination of the electro-mechanical OLTC/satruable reactor voltage control, the high-current CSC’s biggest shortcoming, greatly improves controllability and with firing-shift control, ensures high power-factor for all load conditions. This reduces the reactive power demands on the transmission system, which results in more efficient power delivery
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Book chapters on the topic "Line-commutated inverters"

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Hoft, Richard G. "Phase-Controlled Rectifiers and Line-Commutated Inverters." In Semiconductor Power Electronics, 126–66. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-011-7015-4_7.

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Conference papers on the topic "Line-commutated inverters"

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Kempe, A., and U. Schonwandt. "EMC of PV-plants with line-commutated inverters." In Conference Record of the Twenty Fifth IEEE Photovoltaic Specialists Conference - 1996. IEEE, 1996. http://dx.doi.org/10.1109/pvsc.1996.564382.

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Corliss, James M., and H. Sprysl. "Measured Torsional Vibration Characteristics of a 100 Megawatt Wind Tunnel Drive Line." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8276.

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Abstract A new 100 MW (135,000 Hp) adjustable speed drive system has recently been installed in the NASA Langley National Transonic Facility. The 100 MW system is the largest of its kind in the world and consists of a salient pole synchronous motor powered by a 12-pulse Load Commutated Inverter variable frequency drive. During system commissioning the drive line torsional vibrations were measured with strain gages and a telemetry-based data acquisition system. The torque measurements included drive start-up and steady-state operation at speeds where the drive motor’s pulsating torques match the drive line’s torsional natural frequency. Rapid drive acceleration rates with short dwell times were effective in reducing torsional vibrations during drive starts. Measured peak torsional vibrations during steady-state operation were comparable to predicted values and large enough to produce noticeable lateral vibrations in the drive line shafting. Cyclic shaft stresses for all operating conditions were well within the fatigue limits of the drive line components. A comparison of the torque measurements to an analytical forced response model concluded that a 0.5% critical damping ratio was appropriately applied in the drive line’s torsional analysis.
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Shanthi, T., and N. Ammasai Gounden. "Power electronic interface for grid-connected PV array using boost converter and line-commutated inverter with MPPT." In 2007 International Conference on Intelligent and Advanced Systems (ICIAS). IEEE, 2007. http://dx.doi.org/10.1109/icias.2007.4658513.

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Sood, V. K. "Analysis and simulator evaluation of a dc line-side force-commutated HVDC inverter for feeding a remote load." In 1985 IEEE Power Electronics Specialists Conference. IEEE, 1985. http://dx.doi.org/10.1109/pesc.1985.7071001.

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Unlu, Murat, Sabri Camur, Ersoy Beser, and Birol Arifoglu. "A modified line-commutated inverter for grid-connected photovoltaic systems with voltage-based maximum power point tracking method." In 2017 International Symposium on Power Electronics (Ee). IEEE, 2017. http://dx.doi.org/10.1109/pee.2017.8171672.

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Lavanya, V., N. Ammasai Gounden, and Polimera Malleswara Rao. "A Simple Controller using Line Commutated Inverter with Maximum Power Tracking for Wind-Driven Grid-Connected Permanent Magnet Synchronous Generators." In 2006 International Conference on Power Electronic, Drives and Energy Systems. IEEE, 2006. http://dx.doi.org/10.1109/pedes.2006.344281.

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Zamani, A., and H. Shahalami. "Performance of a hybrid series filter in mitigating power quality problem of a grid-connected PV array interfaced with a line-commutated inverter." In 2014 22nd Iranian Conference on Electrical Engineering (ICEE). IEEE, 2014. http://dx.doi.org/10.1109/iraniancee.2014.6999616.

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Arjun, A., B. Vinod, N. Kumaresan, and D. R. Binu Ben Jose. "A power electronic controller for PV-tied Grid-connected system with single parameter sensing for mppt using boost converter and line-commutated inverter." In 2012 IEEE Third International Conference on Sustainable Energy Technologies (ICSET). IEEE, 2012. http://dx.doi.org/10.1109/icset.2012.6357372.

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