Journal articles: 'Three phase LC filter'

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Jiang, Ying, Jianguo Li, Sanbo Pan, Xi Zhang, Peng Hu, and Haiyan Zhang. "Research on the Comparison Analyses of Three-Phase Discrete and Integrated LC Filters in Three-Phase PV Inverter." International Journal of Photoenergy 2013 (2013): 1–14. http://dx.doi.org/10.1155/2013/217023.

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In three-phase photovoltaic (PV) system, three-phase filter inductors are important part for the output electrical power quality. The comparison analyses of three-phase discrete filter inductors and two kinds of three-phase integrated filter inductors in three-phase PV inverter are proposed. Firstly, the three-phase PV inverter operation with discrete filter inductors is analyzed, and the design of discrete filter inductors is given; then operation of the three-phase PV inverter with three-phase integrated five-limb magnetic core filter inductors is analyzed, the design of integrated filter inductors with five-limb magnetic core is given, then the operation of three-phase PV inverter with three-phase integrated three-limb magnetic core filter inductors is analyzed, and the design of integrated filter inductors with three limbs magnetic core is given. The conclusion of comparison between three-phase discrete filter inductors and two kinds of three-phase integrated filter inductors is done; it means that the three-phase discrete filter inductors can achieve better output electrical power quality with lower power density and three-phase integrated filter inductors can achieve higher power density with lower output electrical power quality. Finally, the experiment results are given to compare the volume and filter effect of three kinds of filter inductors in three-phase PV inverter.

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Kawabata, T., T. Miyashita, and Y. Yamamoto. "Digital control of three-phase PWM inverter with LC filter." IEEE Transactions on Power Electronics 6, no. 1 (January 1991): 62–72. http://dx.doi.org/10.1109/63.65004.

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Mohammad Noor, S. Z., N. Rosmizi, N. Aminudin, and Faranadia A.H. "Investigation of Passive Filter Performance on Three Phase DC to AC Converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 3 (September 1, 2018): 1016. http://dx.doi.org/10.11591/ijpeds.v9.i3.pp1016-1028.

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This work presents investigation of passive filter performance on three-phase inverter with 180° conduction mode. The simulation model of the inverter is developed by using MATLAB/Simulink. The power circuit used Insulated Gate Bipolar Transistor (IGBT) as switching device. The inverter is controlled by using bipolar Sinusoidal Pulse Width Modulation (SPWM) technique. The IGBT was set to 25 kHz for switching frequency (fs). Three types of passive filters which are LC, RC and PI filters are used to investigate the ability to remove the unwanted signal that occurred on the inverter. The result is analyzed based on the performances of output filter in term of Total Harmonic Distortion in voltage (THDv), current (THDi), shape of output voltage and current. The THD must be less than 5% at rated inverter output voltage or current by referring to IEC 61727 Standard. The passive filter is modeled in MATLAB/Simulink environment to study the characteristics and performance of the filters.

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Athavan, T., J. Jayakumar, and N. V. Ajin. "A LC Coupling Hybrid Active Power Filter in Three Phase Three Wire Systems." INTERNATIONAL JOURNAL OF RECENT TRENDS IN ENGINEERING & RESEARCH 05, Special Issue 07 (March 4, 2019): 1–7. http://dx.doi.org/10.23883/ijrter.conf.20190304.001.eheow.

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Houari, Azeddine, Hugues Renaudineau, Jean-Philippe Martin, Serge Pierfederici, and Farid Meibody-Tabar. "Flatness-Based Control of Three-Phase Inverter With Output $LC$ Filter." IEEE Transactions on Industrial Electronics 59, no. 7 (July 2012): 2890–97. http://dx.doi.org/10.1109/tie.2011.2170396.

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García-Fernández, Alejandro, Jesús Doval-Gandoy, and Diego Pérez-Estévez. "Discrete Fundamental AC Voltage Controller for Three-Phase Standalone Converters." Energies 14, no. 3 (January 27, 2021): 650. http://dx.doi.org/10.3390/en14030650.

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Voltage control of standalone converters with LC filter is usually based on proportional-resonant or proportional-integral controllers, which often require further active damping methods to achieve stability. These solutions place design constraints in the selection of the closed-loop pole locations which limit the achievable bandwidth and increase the design complexity. In contrast, in state-space based controllers, the closed-loop poles can be placed freely through state feedback, which makes them particularly suitable for high order plants and/or low sampling frequencies. Among the modern control methods, direct pole placement is a simple technique that enables the establishment of a straightforward relationship between outcome and design, as opposed to more advanced approaches. This paper presents a discrete state-space voltage controller for standalone converters with LC output filter. The proposed method combines the direct pole placement technique with a virtual disturbance observer in order to compensate the effects produced by the load and model mismatches. The design process takes into account both the filter parameters and the sampling frequency, rendering the performance of the obtained controller independent of both. The result is a streamlined design procedure that leads to consistent outcomes for a wide range of plant parameter variations, requiring only one input: the desired closed-loop bandwidth.

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Kukrer, O. "Deadbeat control of a three-phase inverter with an output LC filter." IEEE Transactions on Power Electronics 11, no. 1 (January 1996): 16–23. http://dx.doi.org/10.1109/63.484412.

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Almardy, Mohamed S., and Ashoka K. S. Bhat. "Three-Phase (LC)(L)-Type Series-Resonant Converter With Capacitive Output Filter." IEEE Transactions on Power Electronics 26, no. 4 (April 2011): 1172–83. http://dx.doi.org/10.1109/tpel.2010.2076365.

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Mohamed, Ihab S., Sherif A. Zaid, M. F. Abu Elyazeed, and Hany M. Elsayed. "Improved model predictive control for three-phase inverter with output LC filter." International Journal of Modelling, Identification and Control 23, no. 4 (2015): 371. http://dx.doi.org/10.1504/ijmic.2015.070642.

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Kim, Kwang-Seob, and Dong-Seok Hyun. "A Novel Control Algorithm of a Three-phase PWM Inverter with LC Filter." Transactions of the Korean Institute of Power Electronics 20, no. 3 (June 20, 2015): 239–46. http://dx.doi.org/10.6113/tkpe.2015.20.3.239.

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Jung, J. W., V. Q. Leu, D. Q. Dang, T. D. Do, F. Mwasilu, and H. H. Choi. "Intelligent voltage control strategy for three-phase UPS inverters with output LC filter." International Journal of Electronics 102, no. 8 (October 16, 2014): 1267–88. http://dx.doi.org/10.1080/00207217.2014.966781.

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Sleszynski, Wojciech, Artur Cichowski, and Piotr Mysiak. "Suppression of Supply Current Harmonics of 18-Pulse Diode Rectifier by Series Active Power Filter with LC Coupling." Energies 13, no. 22 (November 19, 2020): 6060. http://dx.doi.org/10.3390/en13226060.

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The reported research aims at improving the quality of three-phase rectifier supply currents. An effective method consists of adding properly formed booster voltages to the fundamental supply voltages using a series active filter. In the proposed solution, the booster voltages are generated by three single-phase systems consisting of inverters, LC filters, and single-phase transformers. The application of LC couplings ensures low emission of disturbances, but may provoke compensator stability problems. The article presents the current control system for a series active filter designed to suppress the dominant harmonics in the supply currents of an 18-pulse rectifier, without interference into fundamental current components. A proportional control is proposed in combination with integral terms implemented in the orthogonal coordinate systems, which synchronically rotate with frequencies equal to those of the harmonic components to be eliminated. The use of complex gains in integral terms allows a simple phase correction of the output signals. A description is given of the method to determine controller parameters based on the mathematical model of the control object. Sample results of experimental tests performed in steady-state and transient conditions are included to illustrate the quality of performance of the series active filter as compared to the results recorded for the rectifier alone, and for the rectifier with additional line reactor. The applied control method of active filter significantly reduces harmonic distortion of the grid current, which is particularly advantageous at nonideal supply voltage and low loads.

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Slimani, Abdeldjalil, Mohammed Nacer Tanjaoui, Abdelkader Boutadara, Lakhdar Saihi, Nadjem Bailek, M. Sharaf Adel, and Khaled Koussa. "A PV-Active Power Filter Interface Scheme for Three Phase Balanced System." International Journal of Engineering Research in Africa 46 (January 2020): 125–45. http://dx.doi.org/10.4028/www.scientific.net/jera.46.125.

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This paper presents a modified hybrid Controller based on instantaneous power-fuzzy controller (IPFLC) for a shunt active power filter (SAPF). The current produced by the AC source is polluted by harmonics injected by the non-linear loads. The supply system requires filtering by suppressing harmonic currents to improve power quality at interface bus. The filtering system consists of an LC filter and a SAPF. The proposed IPFL Controller for the SAPF is based on a combination of the p-q instantaneous power and the fuzzy logic strategy. In this part, two cases are studied, first the active filter is connected only to a capacitor by its dc side, and second case where the active filter is connected to a photovoltaic source or to a battery. The effectiveness, robustness and the dynamic speed of the proposed controller is validated and assessed using dynamic digital simulation. Digital Simulation results validated also the effectiveness of the active filter scheme with modified controller in reducing the source current THD from 25.87% to 0.83% which largely meets the standards of IEEE STD and International Electro-technical Commission (IEC). Digital Simulation and validation used MATLAB-SIMULINK Software Environment.

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Kim, Kwang-Seob, and Dong-Seok Hyun. "A Novel Active Damping Control of a Three-phase PWM Inverter with LC Filter." Journal of Electrical Engineering and Technology 10, no. 4 (July 1, 2015): 1589–96. http://dx.doi.org/10.5370/jeet.2015.10.4.1589.

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15

Nauman, Muhammad, and Ammar Hasan. "Efficient Implicit Model-Predictive Control of a Three-Phase Inverter With an Output LC Filter." IEEE Transactions on Power Electronics 31, no. 9 (September 2016): 6075–78. http://dx.doi.org/10.1109/tpel.2016.2535263.

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Cao, Wei, Jing Sun, Hu Su, and Dao Pei Yang. "The Design and Research of Three-Phase Inverter Dual-Loop Control." Applied Mechanics and Materials 672-674 (October 2014): 961–67. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.961.

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A dual-loop (inner current loop and outer voltage loop) control scheme for micro electric source inverters in microgrid is improved in this paper. In order to make dual-loop control analysis more accurate, LC filter, SVPWM module equivalent are included in the inverter supplied system model. Based on the fully decoupled dq axis model,the PI controller are used in both inner current loop and outer voltage loop. The inner current loop is designed with engineering algorithm and the outer voltage loop with bode diagram and step response. The simulation results show the validity of the designed control in that the proposed design methodology not only enhances steady state performance of the system, improves the voltage quality but also enables the current limiting.

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Kashan, Karam Abdulwahed, and Fadhil Abbas Al-Qrimli. "National Grid Connected 3-Phase Inverter based on Photovoltaic Solar System." Journal of Engineering 26, no. 12 (December 1, 2020): 21–43. http://dx.doi.org/10.31026/j.eng.2020.12.02.

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In this paper, a national grid-connected photovoltaic (PV) system is proposed. It extracts the maximum power point (MPP) using three-incremental-steps perturb and observe (TISP&O) maximum power point tracking (MPPT) method. It improves the classic P&O by using three incremental duty ratio (ΔD) instead of a single one in the conventional P and O MPPT method. Therefore, the system's performance is improved to a higher speed and less power fluctuation around the MPP. The Boost converter controls the MPPT and then is connected to a three-phase voltage source inverter (VSI). This type of inverter needs a high and constant input voltage. A second-order low pass (LC) filter is connected to the output of VSI to reduce the total harmonic distortion (THD) of the output current. The LC filter is then connected to a step-up transformer to push up the low VSI output voltage to the high grid voltage level. The control strategy is based on the rotating reference frame (dq reference frame) and the grid phase shift angle extracted using a phase-locked loop (PLL) technique. The designed PV system supplies only active power with zero reactive power to the utility grid. The system is simulated using MATLAB / Simulink software.

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Nguyen, Hoach The, Eun-Kyung Kim, Ik-Pyo Kim, Han Ho Choi, and Jin-Woo Jung. "Model Predictive Control with Modulated Optimal Vector for a Three-Phase Inverter with an LC Filter." IEEE Transactions on Power Electronics 33, no. 3 (March 2018): 2690–703. http://dx.doi.org/10.1109/tpel.2017.2694049.

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Almardy, Mohamed, and Ashoka K. S. Bhat. "Three-phase fixed-frequency interleaved (LC)(L)-type series-resonant converter with a capacitive output filter." Journal of Engineering 2019, no. 17 (June 1, 2019): 4178–84. http://dx.doi.org/10.1049/joe.2018.8073.

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Ghazzali, Mohamed, Mohamed Haloua, and Fouad Giri. "Fully decoupled fixed-time cascade control of three-phase voltage source converters with LC output filter." IOP Conference Series: Earth and Environmental Science 541 (July 28, 2020): 012009. http://dx.doi.org/10.1088/1755-1315/541/1/012009.

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Mohamed, Ihab S., Stefano Rovetta, Ton Duc Do, Tomislav Dragicevic, and Ahmed A. Zaki Diab. "A Neural-Network-Based Model Predictive Control of Three-Phase Inverter With an Output $LC$ Filter." IEEE Access 7 (2019): 124737–49. http://dx.doi.org/10.1109/access.2019.2938220.

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Wang, Lei, Chi-Seng Lam, and Man-Chung Wong. "Unbalanced Control Strategy for A Thyristor-Controlled LC-Coupling Hybrid Active Power Filter in Three-Phase Three-Wire Systems." IEEE Transactions on Power Electronics 32, no. 2 (February 2017): 1056–69. http://dx.doi.org/10.1109/tpel.2016.2555330.

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VIJAYAKUMAR, M., and S. VIJAYAN. "THREE-PHASE FOUR-WIRE PV-BASED SERIES HYBRID ACTIVE POWER FILTER FOR POWER QUALITY IMPROVEMENT." Journal of Circuits, Systems and Computers 23, no. 10 (October 14, 2014): 1450144. http://dx.doi.org/10.1142/s0218126614501448.

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This paper proposes a photovoltaic (PV)-based three-phase four-wire (3P4W) series hybrid active power filter (SHAPF) it comprises of a series active power filter (SAPF) and an LC shunt passive filter. The proposed system eliminates both the current and voltage harmonics and compensates reactive power, neutral current and voltage interruption. A SAPF demands a source of energy for compensating the voltage sag/swell. This system introduces a new topology for SHAPF utilizes the PV with DC–DC boost converter as a source of DC power for SAPF. The compensation current reference evaluation is based on the twin formulation of the vectorial theory of electrical power theorem with fuzzy logic controller (FLC). The PV array/battery managed DC–DC boost converter is employed to step up the voltage to meet the DC bus voltage requirement of the three-leg voltage source inverter (VSI). The foremost benefit of the proposed system is that, it will provide uninterrupted compensation for the whole day. This system utilizes the renewable energy accordingly saves the energy and shares the load during the solar irradiation available. The simulation and experimental studies are carried out to validate the effectiveness of the proposed PV-SHAPF.

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Somolinos, Jose Andrés, Rafael Morales, Carlos Morón, and Alfonso Garcia. "Effective Power Signal Filtering Using LC Filters with Air Core Coils." Key Engineering Materials 605 (April 2014): 251–54. http://dx.doi.org/10.4028/www.scientific.net/kem.605.251.

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Computer controlled power supplies are usually expensive when high performance (power, wide voltage range, low ripple factor and low response time) are required. This paper presents a simple and effective computer controlled DC system based on a commercial V/f inverter combined with a three-phase bridge rectifier and a LC power filter. Because of the widely variable frequency range of the V/f inverter when a wide range of voltage is required, amorphous or ferromagnetic core coils are avoided, and air core coils become an excellent solution to implement the filter and increase the efficiency of the power system. The proposed method for designing the LC filter is based on the full dynamic model of the filter-load set and the selection of the desired poles of the system according to the load to be coupled. The proposed topology lets obtain good time responses (setting time less than 100 ms) and good ripple factor (less than 1%) without any overshooting, even when low voltage output is required.

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Kim, Soo-Hong, and Yoon-Ho Kim. "Design and analysis of an LC trap/LCR output filter for a single-phase NPC three-level inverter." International Journal of Electronics 95, no. 12 (December 2008): 1279–92. http://dx.doi.org/10.1080/00207210802524286.

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Sanchez, Roberto, Geneviève Dauphin-Tanguy, Xavier Guillaud, and Frédéric Colas. "Bond graph based control of a three-phase inverter with LC filter – Connection to passive and active loads." Simulation Modelling Practice and Theory 18, no. 9 (October 2010): 1185–98. http://dx.doi.org/10.1016/j.simpat.2010.05.016.

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Blasko, V., and V. Kaura. "A novel control to actively damp resonance in input LC filter of a three-phase voltage source converter." IEEE Transactions on Industry Applications 33, no. 2 (1997): 542–50. http://dx.doi.org/10.1109/28.568021.

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Laagoubi, Taoufik, Mostafa Bouzi, and Mohamed Benchagra. "MPPT and Power Factor Control for Grid Connected PV Systems with Fuzzy Logic Controllers." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 1 (March 1, 2018): 105. http://dx.doi.org/10.11591/ijpeds.v9.i1.pp105-113.

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Two fuzzy logic controllers are proposed in this paper to control a three phase inverter for grid connected photovoltaic system. The first controller was used to predict the DC voltage that allows the three phase inverter to track the maximum power point of photovoltaic array under different environmental conditions such as irradiances and temperature. The second was used to control the active power and reactive power injected into the grid in order to inject the maximum active power produced by photovoltaic systems into grid with high efficiency and low total harmonic distortion using the same three phase inverter. The system components are photovoltaic array, DC link voltage, three-phase inverter, inverter control, LC filter, transformer and grid. To verify the effectivnesse of the introdueced system, modeling and simulation are verified in Matlab/Simulink due to its frequent use and its effectiveness.

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Atrache, Latifa Latrous, and Sadok Sabbah. "Determination of phenyl-N-methylcarbamates and their hydrolysis products in water, using solid-phase extraction and reversed-phase liquid chromatography with UV and electrospray mass spectrometric detection." Canadian Journal of Chemistry 81, no. 9 (September 1, 2003): 971–81. http://dx.doi.org/10.1139/v03-085.

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In this study, eight phenyl-N-methylcarbamates (PNMCs) were considered. Reversed-phase LC was set up for UV and mass spectrometry (MS) detection mode. Gradient elution was used, and the mobile phase was composed of acetonitrile and water. UVvis was performed at 220 nm. The method was tested with different reversed-phase columns. Comparison between chromatographic parameters: retention time (tR), resolution (RS), and selectivity (α) was established. Hydrolysis kinetics of three of the PNMCs were reported. The major hydrolysis products were determined by LCUV, and the effect of pH on hydrolysis was also studied. Also, chromatographic separation of a mixture of PNMCs and four of their hydrolysis products was carried out. The preconcentration of 12 studied solutes was realized by solid-phase extraction. C18 extraction cartridges of 1 g were used to extract solutes from a 100 mL volume of tap and surface water spiked at 10 µg/L. The recoveries were, respectively, between 6886% and 6283% with relative a standard deviation of less than 11%. Limits of detection (LODs) and limits of quantitation (LOQs) ranged, respectively, from 14 µg/L and from 410 µg/L. Since standard UV detection does not provide adequate selectivity for water samples, an electrospray (ES)-MS instrument equipped with a triple quadrupole mass filter was used. MS data acquisition was performed by a time-scheduled, selected-ion monitoring (SIM) program. Limits of quantitation gave values between 0.10.5 µg/L.Key words: phenyl-N-methylcarbamates, water analysis, solid-phase extraction, LCUVvis, LCES-MS.

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Bellan, Diego. "Circuit Modeling and Statistical Analysis of Differential-to-Common-Mode Noise Conversion Due to Filter Unbalancing in Three-Phase Motor Drive Systems." Electronics 9, no. 10 (October 1, 2020): 1612. http://dx.doi.org/10.3390/electronics9101612.

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This work deals with circuit modeling of noise mode conversion due to system asymmetry in a three-phase motor drive system. In fact, it is well-known that in case of system asymmetry (e.g., slightly asymmetrical LC filter parameters), differential-mode noise can convert into common-mode noise, resulting in increased level of conducted electromagnetic interference. This phenomenon has been observed with measurements and reported in previous works, but a clear and rigorous analytical description is still a challenging point. The main novelty proposed in the paper is a rigorous analytical description of differential-to-common-mode noise conversion based on the Clarke transformation and the eigenvalue analysis. In particular, the magnitude and the frequency location of the differential-mode resonances injected into the common-mode circuit are derived in closed form. Moreover, since system asymmetry is usually uncontrolled (e.g., component tolerance and parasitic elements), a statistical analysis is also presented by treating the parameters of the LC filter as random variables. Thus, a second contribution proposed in the paper is the analytical derivation in closed form of the probability density function, the mean value, and the standard deviation of the random frequency location of the resonance peaks injected into the common-mode circuit. The importance of the analytical results derived in the paper is two-fold. First, a deep theoretical understanding of the phenomenon in terms of circuit theory concepts is achieved. Second, the impact of differential-to-common-mode noise conversion is described in quantitative terms. Thus, the obtained analytical results can be used to predict or explain the noise conversion impact on the frequency-domain measurements of common-mode currents. Theoretical derivations are validated through a time-domain Simulink implementation of a three-phase motor drive system, and a frequency-domain analysis through the discrete Fourier transform.

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Serra, Federico M., Lucas M. Fernández, Oscar D. Montoya, Walter Gil-González, and Jesus C. Hernández. "Nonlinear Voltage Control for Three-Phase DC-AC Converters in Hybrid Systems: An Application of the PI-PBC Method." Electronics 9, no. 5 (May 20, 2020): 847. http://dx.doi.org/10.3390/electronics9050847.

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In this paper, a proportional-integral passivity-based controller (PI-PBC) is proposed to regulate the amplitude and frequency of the three-phase output voltage in a direct-current alternating-current (DC-AC) converter with an LC filter. This converter is used to supply energy to AC loads in hybrid renewable based systems. The proposed strategy uses the well-known proportional-integral (PI) actions and guarantees the stability of the system by means of the Lyapunov theory. The proposed controller continues to maintain the simplicity and robustness of the PI controls using the Hamiltonian representation of the system, thereby ensuring stability and producing improvements in the performance. The performance of the proposed controller was validated based on simulation and experimental results after considering parametric variations and comparing them with classical approaches.

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Zadeh, Ali Kalantar, Leila Ilan Kashkooli, and Seyed Alireza Mirzaee. "Designing a power inverter and comparing back-stepping, sliding-mode and fuzzy controllers for a single-phase inverter in an emergency power supply." Ciência e Natura 37 (December 19, 2015): 175. http://dx.doi.org/10.5902/2179460x20769.

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In recent years, there has been a high demand for high-power inverters. Unlike a rectifier, an inverter with a high-power electronic oscillator is able to convert direct current (DC) into alternating current (AC) in different forms. Regarding this point, the current paper presents an analysis and design of fuzzy logic control (FLC) applied to an inverter of a single-phase voltage source using LC filter and voltage sensor. Also, three modes of inverter voltage non-linear control (back-stepping, sliding and fuzzy modes) have been simulated and compared. The results of simulation indicated that the suggested FLC could attenuate and reduce total harmonic distortion (THD) under linear loading conditions.

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Yong, Yang. "Direct Instantaneous Power Control of Three-level Grid-connected." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 3 (June 1, 2016): 1260. http://dx.doi.org/10.11591/ijece.v6i3.8193.

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Power electronic grid-connected inverters are widely applied as grid interface in renewable energy sources. This paper presents direct instantaneous power control of a three-phase three-level Neutral Point Clamped (NPC) grid-connected inverter in photovoltaic generation systems. The system consists of a PV array, DC/DC converter, three-level NPC LC filter and the grid. In order to achieve maximum power point tracking (MPPT), an adaptive perturb and observe MPPT is used. For balancing the neutral point (NP) voltage, the control scheme through proportional integral (PI) control according to the direction of the NP current based on redundant vector selection is used. Direct instantaneous power control is developed in a rotating synchronous dq reference frame with space vector modulation with improved operation performance study of the positive sequence detector (PSD) plus a synchronous a synchronous reference frame phase-locked loop (PLL) as the synchronization method. The performance of the proposed method is investigated by a grid-connected photovoltaic system with a nominal power of 12kW. The feasibility of the proposed method is verified through experimental results, showing good steady-state and dynamic performance.

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Yong, Yang. "Direct Instantaneous Power Control of Three-level Grid-connected." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 3 (June 1, 2016): 1260. http://dx.doi.org/10.11591/ijece.v6i3.pp1260-1273.

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Power electronic grid-connected inverters are widely applied as grid interface in renewable energy sources. This paper presents direct instantaneous power control of a three-phase three-level Neutral Point Clamped (NPC) grid-connected inverter in photovoltaic generation systems. The system consists of a PV array, DC/DC converter, three-level NPC LC filter and the grid. In order to achieve maximum power point tracking (MPPT), an adaptive perturb and observe MPPT is used. For balancing the neutral point (NP) voltage, the control scheme through proportional integral (PI) control according to the direction of the NP current based on redundant vector selection is used. Direct instantaneous power control is developed in a rotating synchronous dq reference frame with space vector modulation with improved operation performance study of the positive sequence detector (PSD) plus a synchronous a synchronous reference frame phase-locked loop (PLL) as the synchronization method. The performance of the proposed method is investigated by a grid-connected photovoltaic system with a nominal power of 12kW. The feasibility of the proposed method is verified through experimental results, showing good steady-state and dynamic performance.

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Ali, Ahmed Ismail M., Takaharu Takeshita, and Mahmoud A. Sayed. "Three-Phase PWM Inverter for Isolated Grid-Connected Renewable Energy Applications." Energies 14, no. 12 (June 21, 2021): 3701. http://dx.doi.org/10.3390/en14123701.

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This paper proposes a three-phase isolated flyback inverter (IFBI) for single-stage grid-tied solar PV applications, considering a simple sinusoidal pulse-width modulation (SPWM) scheme. The proposed single-stage inverter employs a reduced passive elements count by considering three input-parallel output-differential (IPOD) flyback converter modules. Additionally, a single small size LC-input low-pass filter is utilized at the input paralleling point for ripple-free input current operation, which is essential in grid-connected renewable energy applications. In addition, a mathematical model of the IFBI is presented to confirm the existence of its low-order harmonic components. A simple PI controller-based control scheme, considering only two loops and five sensors, is used to control the proposed grid-tied IFBI. Continuous modulation scheme (CMS) combined with SPWM is used to diminish the low-frequency harmonic components. Moreover, a simple selective harmonic elimination (SHE) loop is used for second-order harmonic components (SOHC) elimination from grid-injected currents. The SHE has decreased the SOHC from 43% to 0.96%, which improves the grid current THD from 39% to 3.65%, to follow the IEEE harmonic standard limits. Additionally, the harmonic elimination technique decreases the circulating power between the inverter paralleled modules, which enhances the grid currents power factor. The proposed inverter is verified through a grid-connected 200 V, 1.6 kW, 60 Hz experimental prototype, and the switching frequency is 50 kHz. TMS-based DSP controller is used to control the grid-injected power to follow the reference power set-point.

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Tekin, Ahmet, Mehmet R. Yuce, and Wentai Liu. "Integrated VCOs for Medical Implant Transceivers." VLSI Design 2008 (June 11, 2008): 1–10. http://dx.doi.org/10.1155/2008/912536.

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The 402–405 MHz medical implant communication service (MICS) band has recently been allocated by the US Federal Communication Commission (FCC) with the potential to replace the low-frequency inductive coupling techniques in implantable devices. This band was particularly chosen to provide full-integration, low-power, faster data transfer, and longer communication range. This paper investigates the design of a voltage-controlled oscillator (VCO) that will be an essential building block of such wireless implantable devices operating in the MICS service band. Three different integrated quadrature VCOs that meet the requirements of the MICS standard are designed in 0.18 μm TSMC CMOS process to propose an optimum choice. Their performances in terms of power consumption, die area, linearity, and phase noise are compared. The fabricated VCOs are a four-stage differential ring VCO, an LC tank VCO directly loaded with a poly-phase filter, and an 800 MHz LC tank VCO with a high-frequency master-slave divider. All three architectures target a VCO gain of Kvco = 15 MHz/V with 3 calibration control and 2 frequency-shift keying (FSK) control signals and are designed for 1.5 V supply voltage in a 0.18-μm standard CMOS process.

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Nguyen, Hoach The, Jinuk Kim, and Jin-Woo Jung. "Improved Model Predictive Control by Robust Prediction and Stability-Constrained Finite States for Three-Phase Inverters With an Output $LC$ Filter." IEEE Access 7 (2019): 12673–85. http://dx.doi.org/10.1109/access.2019.2891535.

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Ufnalski, Bartlomiej, Arkadiusz Kaszewski, and Lech M. Grzesiak. "Particle Swarm Optimization of the Multioscillatory LQR for a Three-Phase Four-Wire Voltage-Source Inverter With an $LC$ Output Filter." IEEE Transactions on Industrial Electronics 62, no. 1 (January 2015): 484–93. http://dx.doi.org/10.1109/tie.2014.2334669.

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Shneen, Salam Waley, Fatin Nabeel Abdullah, and Dina Harith Shaker. "Simulation model of single phase PWM inverter by using MATLAB/Simulink." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 1 (March 1, 2021): 212. http://dx.doi.org/10.11591/ijpeds.v12.i1.pp212-216.

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This work is presenting under the title simulation model of single phase PWM inverter by using MATLAB/Simulink. There are many researchers’ works in this field with the different ways because it is important field and it has many applications. The converter DC power to AC power for any system that mean it need the power electronic device (inverter). The inverter is using when the source DC power and the load AC power. In this work, the simulation system includes the source 300V DC power, inverter, LC filter and load (R). The simulation result shows the waveform of all part in this system like input and output current and voltage.

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Malathi, R., and M. Rathinakumar. "Comparison of Sine and Space Vector Modulated Embedded Z-Source Inverter fed Three Phase Induction Motor Drive System." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 4 (December 1, 2016): 1240. http://dx.doi.org/10.11591/ijpeds.v7.i4.pp1240-1251.

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This paper deals with performance of photovoltaic powered Embedded Z-Source Inverter (EZSI) fed Induction motor drive. The DC output from the PV-Panel is boosted and converted into AC using Embedded Z-Source Inverter. EZSI system based on the concept of Z-Source Inverter (ZSI), which provides single stage power conversion. The EZSI also produce same voltage gain as that of the ZSI based system. In EZSI the DC source is embedded within the X-shaped LC impedance network, due to this EZSI has the added advantage of inherent source filtering capability , this can be achieved without any extra passive filter. EZSI can produce the AC output voltage which is greater than the DC link voltage. EZSI system also provides ride-through capability under voltage sags. In this paper the performance of space vector modulated EZSI fed Induction Motor Drive is compared with sinusoidal PWM controlled EZSI fed Drive system. The PV powered EZSI fed three phase Induction Motor System is designed, modeled and simulated using MAT LAB-SIMULINK and the corresponding results are presented. This drive system has advantages like voltage boosting ability and reduced harmonic content.

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Li, Shuhui, Ishan Jaithwa, Raed Suftah, and Xingang Fu. "Direct-current Vector Control of Three-phase Grid-connected Converter with L, LC, and LCL Filters." Electric Power Components and Systems 43, no. 14 (August 3, 2015): 1644–55. http://dx.doi.org/10.1080/15325008.2015.1045310.

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Monfared, M. "A simplified control strategy for single-phase UPS inverters." Bulletin of the Polish Academy of Sciences Technical Sciences 62, no. 2 (June 1, 2014): 367–73. http://dx.doi.org/10.2478/bpasts-2014-0037.

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Abstract Though there are many strategies to control single-phase uninterruptible power supply (UPS) inverters, they suffer from some drawbacks, the main being complexity. This paper proposes a simple dual-loop controller for the single-phase UPS inverter with the LC filter. The suggested control scheme uses the capacitor current as the feedback signal in the inner current loop. No fictitious phase generation or reference frame transformations are required, and simple proportional gains are employed as both voltage and current regulators. A feedforward of the derivative of the output voltage is also proposed, which significantly improves the performance of the closed loop control system. Then, based on the model of the inverter with the proposed control strategy, a simple and systematic design procedure is presented. Finally, the theoretical achievements are supported by extensive simulations.

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Malinowski, Mariusz, Emil Levi, and Teresa Orlowska-Kowalska. "Introduction to the Special Section on Intelligent Fault Monitoring and Fault–Tolerant Control in Power Electronics, Drives and Renewable Energy Systems." Power Electronics and Drives 4, no. 1 (June 1, 2019): 163–65. http://dx.doi.org/10.2478/pead-2019-0016.

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AbstractThis article constitutes an introductory part of the special section on Intelligent Fault Monitoring and Fault-Tolerant Control in Power Electronics, Drives and Renewable Energy Systems. In the current issue of the journal, the first part of this section is published. Accepted articles are focussed mainly on the sensor-fault diagnosis methods for T-type inverter-fed dual-three phase PMSM drives, partial demagnetization, faults of the permanent magnet synchronous generator (PMSG) and online open phase fault detection (FD) in the sensorless five-phase induction motor drive implemented with an inverter output LC filter and third harmonic injection. Also, neural networks (NN) application in the detection of stator and rotor electrical faults of induction motors has been proposed in one of the papers, and the observer-based FD concept for unknown systems using input–output measurements was applied to a brushless direct current motor drive with unknown parameters.

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Thanomsat, Nattapan, and Boonyang Plangklang. "Modelling of a Micro Grid PV Rooftop System by PSCAD." Applied Mechanics and Materials 839 (June 2016): 34–38. http://dx.doi.org/10.4028/www.scientific.net/amm.839.34.

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A Photovoltaic rooftop system is being grown up for producing electricity in Thailand. The technical study of PV rooftop system is required especially in term of power quality impact from PV rooftop system to the grid system. The aim of this paper is to construct the simulation models of a micro grid PV rooftop system by using the simulation software PSCAD. PSCAD has an advantage that the software provides a complete model of the PV rooftop system in an electromagnetic transient software environment. The modules of study include PV array, three-phase inverter, LC filter, transformer, load, and distribution network. The constructed model is simulated under the Provincial Electricity Authority (PEA) regulations.

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Abdallah, Boucetta Abdou, and Labed Djamel. "Control of power and voltage of solar grid connected." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 1 (February 1, 2016): 26. http://dx.doi.org/10.11591/ijece.v6i1.8632.

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Renewable energy is high on international agendas. Currently, grid-connected photovoltaic systems are a popular technology to convert solar energy into electricity. Control of power injected into the grid, maximum power point, high efficiency, and low total harmonic distortion of the currents injected into the grid are the requirements for inverter connection into the grid. Consequently, the performance of the inverters connected to the grid depends largely on the control strategy applied. In this paper the simulation and design of grid connected three phase photovoltaic system using Matlab/Simulink has examined. The proposed system consists photovoltaic panels, boost and inverter the PV system convert the sun irradiation into direct current, thereafter we have used a boost to track the maximum power point of the PV system, three-phase inverter and LC output filter. A VOC control strategy based on the phase shifting of the inverter output voltage with respect to the grid voltage. The proposed control strategy requires few hardware and computational resources. As a result, the inverter implementation is simple, and it becomes an attractive solution for low power grid connected applications.

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Abd Allah, Boucetta, and Labed Djamel. "Control of Power and Voltage of Solar Grid Connected." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 1 (February 1, 2016): 26. http://dx.doi.org/10.11591/ijece.v6i1.pp26-33.

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Renewable energy is high on international agendas. Currently, grid-connected photovoltaic systems are a popular technology to convert solar energy into electricity. Control of power injected into the grid, maximum power point, high efficiency, and low total harmonic distortion of the currents injected into the grid are the requirements for inverter connection into the grid. Consequently, the performance of the inverters connected to the grid depends largely on the control strategy applied. In this paper the simulation and design of grid connected three phase photovoltaic system using Matlab/Simulink has examined. The proposed system consists photovoltaic panels, boost and inverter the PV system convert the sun irradiation into direct current, thereafter we have used a boost to track the maximum power point of the PV system, three-phase inverter and LC output filter. A VOC control strategy based on the phase shifting of the inverter output voltage with respect to the grid voltage. The proposed control strategy requires few hardware and computational resources. As a result, the inverter implementation is simple, and it becomes an attractive solution for low power grid connected applications.

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Gholami-Khesht, Hosein, Pooya Davari, and Frede Blaabjerg. "An Adaptive Model Predictive Voltage Control for LC-Filtered Voltage Source Inverters." Applied Sciences 11, no. 2 (January 13, 2021): 704. http://dx.doi.org/10.3390/app11020704.

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The three-phase inductor and capacitor filter (LC)-filtered voltage source inverter (VSI) is subjected to uncertain and time-variant parameters and disturbances, e.g., due to aging, thermal effects, and load changes. These uncertainties and disturbances have a considerable impact on the performance of a VSI’s control system. It can degrade system performance or even cause system instability. Therefore, considering the effects of all system uncertainties and disturbances in the control system design is necessary. In this respect and to tackle this issue, this paper proposes an adaptive model predictive control (MPC), which consists of three main parts: an MPC, an augmented state-space model, and an adaptive observer. The augmented state-space model considers all system uncertainties and disturbances and lumps them into two disturbance inputs. The proposed adaptive observer determines the lumped disturbance functions, enabling the control system to keep the nominal system performance under different load conditions and parameters uncertainty. Moreover, it provides load-current-sensorless operation of MPC, which reduces the size and cost, and simultaneously improves the system reliability. Finally, MPC selects the proper converter voltage vector that minimizes the tracking errors based on the augmented model and outputs of the adaptive observer. Simulations and experiments on a 5 kW VSI examine the performance of the proposed adaptive MPC under different load conditions and parameter uncertainties and compare them with the conventional MPC.

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Lam, C. S., W. H. Choi, Y. D. Han, X. X. Cui, and M. C. Wong. "Minimum inverter capacity design for LC-hybrid active power filters in three-phase four-wire distribution systems." IET Power Electronics 5, no. 7 (August 1, 2012): 956–68. http://dx.doi.org/10.1049/iet-pel.2011.0436.

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P, Saisrinivas, Surya Kalavathi. M, and Varunrohit V. "Power quality improvement of a PV and fuel cell connected microgrid." International Journal of Engineering & Technology 7, no. 2.12 (April 3, 2018): 244. http://dx.doi.org/10.14419/ijet.v7i2.12.11290.

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Increasing demands of 21st century gain the need for sustainable energy. Non-conventional energy sources like solar, wind, fuel cell etc. are attaining much importance because of increasing environmental issues like Global Warming, Increase in Carbon foot prints etc. But, Non-conventional energy sources are not controllable. Hence, there is a need of sophisticated control of energies available to use them collectively. This can be made possible by the concept of Microgrid.This paper presents the work done on a typical grid connected Microgrid, with Solar and Fuel cell as non-conventional energy sources, using MATLAB (Simulink). A variable irradiance is considered for PV array designed with an MPPT based on Perturb & Observe Algorithm. A fuel cell stack with constant Hydrogen and air is considered. Here, the non-conventional energy sources are connected to Conventional grid. The variable DC obtained after Solar array is converted to three phase A.C by means of a three-phase inverter. The pulses for the inverter are generated by taking voltage and current both from grid side and PV side respectively as reference. Here, the control strategy to produce pulses for inverter is based on Phase locked loop (PLL) with a PI controller. One of the most important power quality indices like Total Harmonic Distortion (THD) is measured at various points and the power quality is improved by using a Cascaded LC filter.

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Li, Hui, Yue Qu, Junwei Lu, and Shuang Li. "A Composite Strategy for Harmonic Compensation in Standalone Inverter Based on Linear Active Disturbance Rejection Control." Energies 12, no. 13 (July 8, 2019): 2618. http://dx.doi.org/10.3390/en12132618.

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This paper proposes a harmonic compensation control with disturbance rejection function for a standalone inverter. Due to the LC type three-phase three-leg inverter is connected to nonlinear loads, low-order harmonic components appears in the inverter output current. These harmonic current generate harmonic voltage drops when flowing through the filter inductor and the feeder impedance, which causes the output voltage of the inverter distorted. In order to compensate harmonics and produce sinusoidal voltage without additional compensation devices, virtual harmonic impedance method can be added to the fundamental voltage control. Due to the compensation effect of virtual harmonic impedance are very sensitive to the fluctuation of filter inductance. Therefore, inductance variation, as a disturbance in physical system, should be considered. In this paper, linear active disturbance rejection control (LADRC) is proposed in the fundamental voltage control loop to reduce the sensitivity of virtual harmonic impedance and decouple the model. Compared with traditional dual-loop PI control, the proposed strategy has faster dynamic response in control performance and fewer acquisition modules in engineering applications. The whole design process of virtual harmonic impedance and stability analyses of this strategy are provided. The simulation and experiment results show the good performance of the proposed strategy.

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Journal articles on the topic 'Three phase LC filter'

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