Journal articles: 'Single-phase grid system'

1

Augusto Oliveira Da Silva, Sergio, Leonardo Bruno Garcia Campanhol, Vinícius Dário Bacon, and Leonardo Poltronieri Sampaio. "Single-phase Grid-connected Photovoltaic System With Active Power Line Conditioning." Eletrônica de Potência 20, no. 1 (2015): 8–18. http://dx.doi.org/10.18618/rep.2015.1.008018.

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Ismail, Fauzan, Asnal Effendi, and Witrionanda Witrionanda. "Power Injection on Single Phase Grid System." ELKHA 11, no. 1 (2019): 47. http://dx.doi.org/10.26418/elkha.v11i1.30932.

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This paper deals with power injection on single phase grid connected inverter. The simple method is introduced to understand the concept of grid connected systems. A phase Lock Loop (PLL) method estimates the phase-angle of grid system. The output of PLL is used to defines Iref , and the current of inverter becomes a feedback (IL). Both current are derived to produce PWM using current mode controller method. As long as the grid system on fault condition like voltage distortion, therefore the single-phase inverter that connected into the grid should change the role and keep stabilization. The voltages sag and swell are the possible conditions that occurred on a power system. Voltage Sag is an event where the line voltage decreases from the nominal line-voltage for a short period of time. Voltage swell is the event when the line voltage increase from the nominal line voltage. By using PSIM software, the injection and absorption of power into a grid system is verified during a voltage sag, swell, and normal. The simulation shows voltage grid vg, current inverter iinv, current grid, active power P, reactive power Q. The waveform of the measured parameter is analized to define the role of inverter toward grid. the The result shows performance of the proposed inverter to absorb reactive power during swell, and inject reactive power when sagging.

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Nurhazwani, Anang, Mariam Wan Muda Wan, and Zalani Daud Muhamad. "Assessment of a single-phase single-stage grid-connected photovoltaic system." Assessment of a single-phase single-stage grid-connected photovoltaic system 30, no. 3 (2023): 1339–47. https://doi.org/10.11591/ijeecs.v30.i3.pp1339-1347.

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A grid-connected photovoltaic (GCPV) system plays an important role in the development of green technology. However, generated photovoltaic (PV) power that is injected into the grid causes instability in the grid system. Previous studies have shown that power quality for a three-phase system is thoroughly being discussed, but not for a single-phase system. Single-phase system also contribute to instability in low-voltage grid networks during high power penetration as majority of the single-phase GCPV nowadays are installed on rooftops. Thus, in this study, the power quality of a single-phase single-stage GCPV system is investigated based on the total harmonic distortion (THD), power factor (PF), and the generated active (P) and reactive (Q) power during different solar irradiance and varying loads conditions. A model of the GCPV system was developed in MATLAB/Simulink, so that certain variables can be varied to observe their effect towards the power quality. The results show that the current and voltage of generated PV power are synchronized and having low current THD which is less than 1% for all cases. PF values are also in the acceptable range in compliance to IEC 61727 standard which is 0.9971, and the generated PQ is in accordance to the connected load.

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Yorino, Naoto, Yoshifumi Zoka, Yutaka Sasaki, et al. "Development of Single-Phase Synchronous Inverter for Single-Phase Microgrid." Electronics 13, no. 3 (2024): 478. http://dx.doi.org/10.3390/electronics13030478.

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The work is based on a collaboration between Hiroshima University and Kure KOSEN College. This paper presents the design concept, hardware, and applications of a single-phase synchronous inverter (SSI), a specially designed grid-forming inverter (GFM) for single-phase micro-grid (SMGs). The SSI is designed for the conventional 100/200 V distribution network and is based on the concept of “Non-Interference Core (NIC) dynamic model”. Novel contributions of this paper are: (1) A root mean square (RMS) model of NIC-SSI was developed, combined with the conventional power system model, and verified through the comparison with the hardware-in-the-loop (HIL) simulation and SSI hardware experiments; (2) using the developed RMS simulation tool, the stabilization effect of the SSIs was investigated in condition under which the SSIs are massively installed in a distribution system; (3) off-grid SMG operations using SSIs under various ill-conditioned loads were demonstrated. The results show that the SSI has the considerable ability of grid stability enhancements for frequency, transient, and small-signal stabilities. The proposed SMG using SSIs is promising.

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Mr., Vilas S. Solanke*, and Naveen Kumar Mr. "REVIEW ON GRID INTERFACING OF MULTIMEGAWATT PHOTOVOLTAIC INVERTERS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 4 (2016): 458–60. https://doi.org/10.5281/zenodo.49758.

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This paper presents review on the latest development of control of grid connected photovoltaic energy conversion system. Also this paper present existing systems control algorithm for three-phase and single phase grid-connected photovoltaic (PV) system.  This paper focuses on one aspect of solar energy, namely grid interfacing of large-scale PV farms. This Grid-connected photovoltaic  i.e. PV systems can provide a number of benefits to electric utilities, such as power loss reduction, improvement in the voltage profile, and reduction in the maintenance and operational costs of the electric network.

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Venkatachalam, K. M., and Saravanan V. "Grid integration of PMSG based wind energy conversion with battery storage system." International Journal of Applied Power Engineering 10, no. 1 (2021): 48~57. https://doi.org/10.11591/ijape.v10.i1.pp48-57.

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In this paper, the design and implementation of a permanent magnet synchronous generator (PMSG) based wind energy conversion system and battery bank storages are connected to utility grid. It has phase locked loop (PLL) control strategy as it provides for control single-phase grid connected inverter with constant dc-link voltage. The dc-link is interfaced to a permanent magnet synchronous generator through diode bridge rectifier (DBR) with dc-dc boost converter, battery bank and single phase voltage source inverter (VSI).The dc-link voltage is maintained constant value of 48 V by controlling dc-dc converter with help of perturb and observe (P&O) algorithm based maximum power point tracker (MPPT). The VSI output voltage and frequency values are controlled based on grid parameters using PI controller and sinusoidal pulse width modulation (SPWM) technique. In this grid connected system is simulated and performances are analyzed through MATLAB software. The prototype experimental results are verified through 1 kW PMSG, 48 V battery bank with single phase grid connected system.

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Tan, Kuan Tak, Sivaneasan Bala Krishnan, and Andy Yi Zhuang Chua. "Modelling and Simulation of Pico- and Nano-Grids for Renewable Energy Integration in a Campus Microgrid." Energies 18, no. 1 (2024): 67. https://doi.org/10.3390/en18010067.

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Research in renewable energy sources and microgrid systems is critical for the evolving power industry. This paper examines the operational behavior of both pico- and nano-grids during transitions between grid-connected and islanded modes. Simulation results demonstrate that both grids effectively balance the power flow, regulate the state of charge (SOC), and stabilize the voltage during dynamic operational changes. Specific scenarios, including grid disconnection, load sharing, and weather-based energy fluctuations, were tested and validated. This paper models both pico-grids and nano-grids at the Singapore Institute of Technology Punggol Campus, incorporating solar PVs, energy storage systems (ESSs), power electronic converters, and both DC and AC loads, along with utility grid connections. The pico-grid includes a battery storage system, a single-phase inverter linked to a single-phase grid, and DC and AC loads. The nano-grid comprises solar PV panels, a boost converter, a battery storage system, a three-phase inverter connected to a three-phase grid, and AC loads. Both the pico-grid and nano-grid are configurable in standalone or grid-connected modes. This configuration flexibility allows for a detailed operational analysis under various conditions. This study conducted subsystem-level modelling before integrating all components into a simulation environment. MATLAB/Simulink version R2024b was utilized to model, simulate, and analyze the power flow in both the pico-grid and nano-grid under different operating conditions.

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8

Anang, Nurhazwani, Wan Mariam Wan Muda, and Muhamad Zalani Daud. "Assessment of a single-phase single-stage grid-connected photovoltaic system." Indonesian Journal of Electrical Engineering and Computer Science 30, no. 3 (2023): 1339. http://dx.doi.org/10.11591/ijeecs.v30.i3.pp1339-1347.

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A grid-connected photovoltaic (GCPV) system plays an important role in the development of green technology. However, generated photovoltaic (PV) power that is injected into the grid causes instability in the grid system. Previous studies have shown that power quality for a three-phase system is thoroughly being discussed, but not for a single-phase system. Single-phase system also contribute to instability in low-voltage grid networks during high power penetration as majority of the single-phase GCPV nowadays are installed on rooftops. Thus, in this study, the power quality of a single-phase single-stage GCPV system is investigated based on the total harmonic distortion (THD), power factor (PF), and the generated active (P) and reactive (Q) power during different solar irradiance and varying loads conditions. A model of the GCPV system was developed in MATLAB/Simulink, so that certain variables can be varied to observe their effect towards the power quality. The results show that the current and voltage of generated PV power are synchronized and having low current THD which is less than 1% for all cases. PF values are also in the acceptable range in compliance to IEC 61727 standard which is 0.9971, and the generated PQ is in accordance to the connected load.

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9

Yang, Xueqin, Xingyu Liu, Jichao Li та Binbin Zhang. "Current PIλ Control of the Single-Phase Grid Inverter". Mathematical Problems in Engineering 2021 (8 листопада 2021): 1–9. http://dx.doi.org/10.1155/2021/7074771.

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In a grid-connected power generation system, the grid-connected current of the inverter is sensitive to nonlinear factors such as periodic disturbance of grid voltage, which results in grid-connected current waveform distortion. By establishing a single-phase photovoltaic grid-connected inverter control system model, designing an inverse current fractional-order PI (PIλ or FO-PI) controller and the dynamic and steady-state performance, antidisturbance and grid connection inversion characteristics of the system are simulated and compared under the action of the integer-order PI controller and fractional-order PI controller. The quality of the inverter grid-connected current is analyzed by using the fast Fourier transform (FFT). The simulation results show that the fractional-order control system can reduce the total harmonic distortion (THD) of the grid-connected current and dynamic performance and antidisturbance ability of the improving system while satisfying the steady-state performance indexes.

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10

Alajmi, Bader N., Khaled H. Ahmed, Grain Philip Adam, and Barry W. Williams. "Single-Phase Single-Stage Transformer less Grid-Connected PV System." IEEE Transactions on Power Electronics 28, no. 6 (2013): 2664–76. http://dx.doi.org/10.1109/tpel.2012.2228280.

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11

Arafa, Osama M., Ahmed A. Mansour, Khaled S. Sakkoury, Yousry A. Atia, and Mahmoud M. Salem. "Realization of single-phase single-stage grid-connected PV system." Journal of Electrical Systems and Information Technology 4, no. 1 (2017): 1–9. http://dx.doi.org/10.1016/j.jesit.2016.08.004.

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Nurhazwani, Anang, and Mariam Wan Muda Wan. "Analysis of total harmonic distortion in single-phase single-stage grid-connected photovoltaic system." International Journal of Power Electronics and Drive Systems 14, no. 01 (2023): 471~479. https://doi.org/10.11591/ijpeds.v14.i1.pp471-479.

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This study presents the power quality issue mainly focus the effect of total harmonic distortion (THD) on a grid-connected PV system. Firstly, a gridconnected PV system with a single-phase single-stage has been developed to monitor the output values of voltage and current and also its harmonic distortion behaviours. Maximum power point tracking (MPPT) was implemented since it is proven as the first step for THD reduction because MPPT will extract maximum output power, voltage, and current of the PV system without fluctuation which leads to a low THD level. Furthermore, the employment of a good filter also reduces the THD level in a PV system. Thus, this study will focus on the THD analysis to resolve the power quality problems in the grid-connected PV system. The result shows that the THD value for current, ITHD analysis is more significant than the THD value for voltage, VTHD analysis in the case of grid-connected PV systems operating under different solar irradiances. In a conclusion, the increase in solar irradiance will increase the rated values of generated power and current thus, increasing the performance of THD values.

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13

Zhou, Xiao Jie, and Yi Ruan. "Study of DQ Rotating Frame Control for Single-Phase Photovoltaic Grid-Connected System." Advanced Materials Research 542-543 (June 2012): 99–102. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.99.

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Nowadays solar photovoltaic energy has become an important alternative energy sources. This paper focuses on single-phase PV grid-connected system, a reference frame which used for three-phase inverter has been used in this single-phase grid-connected inverter. The in-quadrature signal is generated used T/4 transport delay technique. This single-phase grid-connected inverter uses space vector pulse width modulation(SVPWM) method. Finally, the 3KW small power single-phase photovoltaic inverter system model is built to verify the presented control strategy by using the Matlab/Simulink.

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Alam, Md Aftab, S. V. A. V. Prasad, and Mohammed Asim. "Analysis and Design of H5 Topology in Grid-Connected Single-Phase Transformerless Photovoltaic Inverter System." Indian Journal Of Science And Technology 16, no. 6 (2023): 420–26. http://dx.doi.org/10.17485/ijst/v16i6.2191.

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15

Sudhakar, Mr Wavhal Shashwat, and Prof L. V. Bagale. "Single-Stage Reconfigurable Single-Phase Inverter Topology for Grid-Tied Solar Photovoltaic System." International Journal for Research in Applied Science and Engineering Technology 11, no. 3 (2023): 1881–85. http://dx.doi.org/10.22214/ijraset.2023.49827.

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Abstract: This study proposes a new topology for a single-stage 1-ph inverter used in grid-connected solar PV systems. By using this topology, the need for a DC-DC converter is eliminated, which leads to higher efficiency and lower cost. The inverter is capable of operating in three different modes based on input voltage and grid voltage conditions. A control algorithm determines these conditions. Results from simulations and experiments demonstrate the effectiveness of the proposed topology in terms of efficiency, power quality, and performance under various operating conditions. This new topology shows promise for creating cost-effective and high-performing grid-connected solar PV systems.

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16

Jain, Chinmay, and Bhim Singh. "Single-phase single-stage multifunctional grid interfaced solar photo-voltaic system under abnormal grid conditions." IET Generation, Transmission & Distribution 9, no. 10 (2015): 886–94. http://dx.doi.org/10.1049/iet-gtd.2014.0533.

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17

Mohammad Noor, Siti Zaliha, Ahmad Maliki Omar, and M. A. M. Radzi. "Single-Phase Single Stage String Inverter for Grid Connected Photovoltaic System." Applied Mechanics and Materials 785 (August 2015): 177–81. http://dx.doi.org/10.4028/www.scientific.net/amm.785.177.

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This paper presents the development of single-phase single stage string inverters for grid connected photovoltaic system. The inverter is designed to generate an AC current in phase with the grid voltage and to extract the maximum power from the PV array. The maximum power point tracking (MPPT) is achieved by adjusting the modulation index and phase angle of the inverter’s voltage accordingly using fuzzy logic control algorithm. The prototype system is tested using 2 series of STP170s-24/Ac PV modules. Insulated Gate Bipolar Transistors (IGBTs) are used as power switches while the Sinusoidal Pulse Width Modulation (SPWM) scheme is used as the switching technique to synthesize the output waveform. Simulation model was developed in MATLAB/Simulink environment to study and evaluate behavior of the proposed converter. The results of the prototype system show good agreement with the simulation model.

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Yang, Yongheng, and Frede Blaabjerg. "Low-Voltage Ride-Through Capability of a Single-Stage Single-Phase Photovoltaic System Connected to the Low-Voltage Grid." International Journal of Photoenergy 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/257487.

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The progressive growing of single-phase photovoltaic (PV) systems makes the Distribution System Operators (DSOs) update or revise the existing grid codes in order to guarantee the availability, quality, and reliability of the electrical system. It is expected that the future PV systems connected to the low-voltage grid will be more active with functionalities of low-voltage ride-through (LVRT) and the grid support capability, which is not the case today. In this paper, the operation principle is demonstrated for a single-phase grid-connected PV system in a low-voltage ride-through operation in order to map future challenges. The system is verified by simulations and experiments. Test results show that the proposed power control method is effective and the single-phase PV inverters connected to low-voltage networks are ready to provide grid support and ride-through voltage fault capability with a satisfactory performance based on the grid requirements for three-phase renewable energy systems.

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Drabek, Tomasz, and Paweł Dybowski. "Control of the Transformer Phase Powers Using a Single-Phase Voltage Source." Energies 14, no. 4 (2021): 1038. http://dx.doi.org/10.3390/en14041038.

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Power flow in three-phase distribution grids containing single-phase prosumer voltage sources strongly depends on the RMS value of the voltage of these sources and their phase shifts in relation to the grid voltage. The ideal way to control single-phase prosumer sources should guarantee no return active power to the MV grid through a distribution transformer and no additional reactive power flows in the LV grid. This means that the active power of the one-phase voltage source is consumed by other single-phase customers (in the same phase or in other phases) and the reactive power of this source is equal to zero. The paper presents the results of the investigations of the dynamic control system of a single-phase voltage source that allows meeting these conditions. On the basis of steady-state calculations, the static characteristics of the above-mentioned control, needed to determine of the proper working point of a prosumer source were also obtained. The control process involves the control of the RMS value and phase angle of the voltage source against the phase voltage of the LV grid, to which the source is connected, with simultaneous control of the current phase angle issued by the power source against voltage. The result of the research is the confirmation of the necessity of using a zig–zag connection of the secondary side of distribution transformers. The developed control system of the prosumer voltage source does not fully control the active power of individual phases of the distribution transformer. The paper shows that the power losses in a distribution transformer strongly depend not only on the active power of the prosumer source, but also on its effective voltage and phase in relation to the transformer voltage.

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20

Rodney, H. G. Tan, Boon Chuin Chong, and Govinda Solanki Sunil. "Modeling of single phase off-grid inverter for small standalone system applications." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 3 (2020): 1398–405. https://doi.org/10.11591/ijpeds.v11.i3.pp1398-1405.

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This paper presents the detail circuitry modeling of single phase off-grid inverter for small standalone system applications. The entire model is developed in MATLAB/Simulink platform using circuitry model. This off grid inverter consists of a high frequency DC-DC step up converter cascaded with a full bridge PI control voltage source inverter using SPWM modulation with LC filter to produce sine wave output. This is a common design used in many small commercial off-grid inverter. This off-grid inverter model is capable to produce AC sinewave output voltage at 230 V 50 Hz up to 1 kW power from a 48 V DC lead acid battery source. The AC sine wave output waveform achieved a voltage Total Harmonic Distortion (THD) of less than 1 % which is almost a pure sine wave. The conversion efficiency performance of the off-grid inverter achieved more than 94 %. The performance of the model is validated by real commercial off-grid inverter. The performance validation experiment shows that the off-grid inverter Simulink model conversion efficiency and THD performance are comparable to the commercial off-grid inverter. This model contributes to assist small to medium standalone system load and battery sizing design with greater accuracy.

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Tan, Rodney H. G., Chong Boon Chuin, and Sunil Govinda Solanki. "Modeling of single phase off-grid inverter for small standalone system applications." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (2020): 1398. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1398-1405.

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This paper presents the detail circuitry modeling of single phase off-grid inverter for small standalone system applications. The entire model is developed in MATLAB/Simulink platform using circuitry model. This off grid inverter consists of a high frequency DC-DC step up converter cascaded with a full bridge PI control voltage source inverter using SPWM modulation with LC filter to produce sine wave output. This is a common design used in many small commercial off-grid inverter. This off-grid inverter model is capable to produce AC sinewave output voltage at 230 V 50 Hz up to 1 kW power from a 48 V DC lead acid battery source. The AC sine wave output waveform achieved a voltage Total Harmonic Distortion (THD) of less than 1 % which is almost a pure sine wave. The conversion efficiency performance of the off-grid inverter achieved more than 94 %. The performance of the model is validated by real commercial off-grid inverter. The performance validation experiment shows that the off-grid inverter Simulink model conversion efficiency and THD performance are comparable to the commercial off-grid inverter. This model contributes to assist small to medium standalone system load and battery sizing design with greater accuracy.

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22

Riyadi, Slamet, and Yanuarsyah Haroen. "A Single-Phase Dual-Stage PV-Grid System with Active Filtering." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 3 (2015): 449. http://dx.doi.org/10.11591/ijpeds.v6.i3.pp449-458.

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Integrating photovoltaic based electricity into the grid and power quality improvement have become two major issues in electrical system. Formerly, these can be solved by using two converter systems separately, a PV-Grid System and an active power filter. But recent technology uses only a converter system to do both function. An existed shunt active power filter (SAPF) can be modified to form a dual-stage PV-Grid with active filtering capability. In this paper, a PV-Grid System that is capable to transfer all power generated by PV modules and reduce harmonic contents is proposed. The system was formed by connecting a boost chopper as a Maximum Power Point Tracker and PV modules to the DC-link capacitor of a single-phase SAPF. It just needed a current transducer and also required simpler control circuits. A voltage controller was needed to achieve power equilibrium while a current controller was needed to make the grid current sinusoidal with unity power factor. To verify the analysis, simulations and experiments were done.

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Anang, Nurhazwani, and Wan Mariam Wan Muda. "Analysis of total harmonic distortion in single-phase single-stage grid-connected photovoltaic system." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 1 (2023): 471. http://dx.doi.org/10.11591/ijpeds.v14.i1.pp471-479.

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This study presents the power quality issue mainly focus the effect of total harmonic distortion (THD) on a grid-connected PV system. Firstly, a grid-connected PV system with a single-phase single-stage has been developed to monitor the output values of voltage and current and also its harmonic distortion behaviours. Maximum power point tracking (MPPT) was implemented since it is proven as the first step for THD reduction because MPPT will extract maximum output power, voltage, and current of the PV system without fluctuation which leads to a low THD level. Furthermore, the employment of a good filter also reduces the THD level in a PV system. Thus, this study will focus on the THD analysis to resolve the power quality problems in the grid-connected PV system. The result shows that the THD value for current, ITHD analysis is more significant than the THD value for voltage, VTHD analysis in the case of grid-connected PV systems operating under different solar irradiances. In a conclusion, the increase in solar irradiance will increase the rated values of generated power and current thus, increasing the performance of THD values.

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Zakzouk, Nahla E., Ahmed K. Abdelsalam, Ahmed A. Helal, and Barry W. Williams. "High Performance Single-Phase Single-Stage Grid-Tied PV Current Source Inverter Using Cascaded Harmonic Compensators." Energies 13, no. 2 (2020): 380. http://dx.doi.org/10.3390/en13020380.

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In this paper, a single-phase single-stage photovoltaic (PV) grid-tied system is investigated. The conventional pulse width modulated (PWM) voltage source inverter (VSI) is replaced by a PWM current source inverter (CSI) for its voltage boosting capabilities, inherent short-circuit proof and higher reliability features. Modeling, design, and analysis of the considered CSI are presented altogether with enhanced proposed control loops aided with a modified PWM technique. DC-link even current harmonics are commonly reflected as low-order odd harmonics in the grid resulting in a poor quality grid current. In order to overcome the latter, a high performance proportional resonant controller, applied in the inverter inner grid current loop, is proposed using cascaded resonant control units tuned at low-order frequencies to eliminate injected grid current harmonics. Hence, with a less-bulky smoothing inductor at the CSI DC-side, grid power quality and system efficiency are simultaneously improved. Simulation and experimental results verify the proposed controller effectiveness.

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K M, Venkatachalam, and V. Saravanan. "Grid integration of PMSG based wind energy conversion with battery storage system." International Journal of Applied Power Engineering (IJAPE) 10, no. 1 (2021): 48. http://dx.doi.org/10.11591/ijape.v10.i1.pp48-57.

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In this paper, the design and implementation of a permanent magnet synchronous generator (PMSG) based wind energy conversion system and battery bank storages are connected to utility grid. It has phase locked loop (PLL) control strategy as it provides for control single-phase grid connected inverter with constant dc-link voltage. The dc-link is interfaced to a permanent magnet synchronous generator through diode bridge rectifier (DBR) with dc-dc boost converter, battery bank and single phase voltage source inverter (VSI).The dc-link voltage is maintained constant value of 48 V by controlling dc-dc converter with help of perturb and observe (P&amp;O) algorithm based maximum power point tracker (MPPT). The VSI output voltage and frequency values are controlled based on grid parameters using PI controller and sinusoidal pulse width modulation (SPWM) technique. In this grid connected system is simulated and performances are analyzed through MATLAB software. The prototype experimental results are verified through 1 kW PMSG, 48 V battery bank with single phase grid connected system.

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Jiao, Jiao, and R. Mark Nelms. "Adjusting output impedance using a PI controller to improve the stability of a single phase inverter under weak grid." Transactions on Environment and Electrical Engineering 1, no. 4 (2016): 50. http://dx.doi.org/10.22149/teee.v1i4.61.

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Explored in this paper is the grid impedance effect on the stability of a single-phase grid connected inverter with an LC filter based on an analysis of the inverter output impedance. For a single-phase grid connected inverter, a PI controller is often used to regulate the current injected into the grid. However, the control performance can be influenced when the inverter is connected to a weak grid. Also, the utility grid has background harmonic noise, which can make the injected current distorted. Therefore, analysis of the output impedance of a single-phase grid connected inverter is important for the robustness and stability of the system. By modeling the output impedance of inverter, it can be determined that the proportional gain and integral gain of the controller have an effect on the output impedance. Analytical results show that by adjusting the PI controller parameters, the ability for harmonic reduction and stability of the system can be improved. Simulation and experiments using a 1 kW single-phase grid connected inverter verify the effectiveness of the theoretical analysis.

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27

Mohd Azhar, Aina Suhailah, Maaspaliza Azri, Wahidah Abd Halim, Md Hairul Nizam Talib, Zulhani Rasin, and Mohd Fayzul Mohammed. "Hysteresis current control for single-phase transformerless inverter." International Journal of Applied Power Engineering (IJAPE) 14, no. 1 (2025): 1. https://doi.org/10.11591/ijape.v14.i1.pp1-10.

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The total harmonic distortion (THD) of grid current and leakage current are significant for transformerless inverters, as they impact power quality, efficiency, and compliance with grid codes. Monitoring and minimizing these currents ensure safe and reliable grid integration of photovoltaic (PV) systems while reducing electromagnetic interference. Therefore, in this paper, the analysis THD of grid current and leakage current is described. The bipolar pulse width modulation (BPWM) technology provides a stable common-mode voltage (200 V), fewer leakage currents (&lt; 30 mA), and better system efficiency, compared to the unipolar pulse width modulation (UPWM) technique. To ensure the inverter complies with the IEC 61000-3-2 class C (THDi &lt; 5%), the current control strategy should be considered during the design of the transformerless inverter. Therefore, this paper presents an implementation and evaluation of the bipolar hysteresis current control (BHCC) technique. In comparison to the BPWM technique, the BHCC technique delivers lower leakage current (0.007274 A), reduced grid current harmonic distortion (1.81%), and increased efficiency.

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Mohd, Azhar Aina Suhailah, Maaspaliza Azri, Halim Wahidah Abd, Md Hairul Nizam Talib, Zulhani Rasin, and Mohd Fayzul Mohammed. "Hysteresis current control for single-phase transformerless inverter." International Journal of Applied Power Engineering (IJAPE) 14, no. 1 (2025): 1–10. https://doi.org/10.11591/ijape.v14.i1.pp1-10.

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The total harmonic distortion (THD) of grid current and leakage current are significant for transformerless inverters, as they impact power quality, efficiency, and compliance with grid codes. Monitoring and minimizing these currents ensure safe and reliable grid integration of photovoltaic (PV) systems while reducing electromagnetic interference. Therefore, in this paper, the analysis THD of grid current and leakage current is described. The bipolar pulse width modulation (BPWM) technology provides a stable common-mode voltage (200 V), fewer leakage currents (< 30 mA), and better system efficiency, compared to the unipolar pulse width modulation (UPWM) technique. To ensure the inverter complies with the IEC 61000-3-2 class C (THDi < 5%), the current control strategy should be considered during the design of the transformerless inverter. Therefore, this paper presents an implementation and evaluation of the bipolar hysteresis current control (BHCC) technique. In comparison to the BPWM technique, the BHCC technique delivers lower leakage current (0.007274 A), reduced grid current harmonic distortion (1.81%), and increased efficiency.

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Souamy, Loembe. "Research on the MPPT Stability of the Single-Stage and Single-Phase Photovoltaic Grid-Connected System." Applied Mechanics and Materials 263-266 (December 2012): 2252–57. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.2252.

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At present the multi-stage transformation topology are more used in photovoltaic (PV) grid-connected system, although the control of this structure is relatively simple but the conversion efficiency is difficult to improve due to increase in transformation series. The single stage topology has a simple topology with high reliability and efficiency because of low power consumption, but control algorithm is more complex because of its power convert main circuit without DC-DC. This paper describes a method for maximum power point tracking (MPPT) in the single-stage and single-phase PV grid-connected system. In the paper, the nonlinear output characteristics of the PV including I-V & P-V are obtained in changed solar insulations or temperature based on MATLAB, and the MPPT algorithm which is based on the particle swarm optimization (PSO) method is also described. The simulation model of the single-stage and single-phase PV grid-connected system is built , and simulation results show the MPPT algorithm has excellent dynamic and static performances ,which verifies the PSO method is effective for MPPT in the single-stage and single-phase PV grid-connected system.

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Hu, Bo, and Zai Lin Piao. "Research on the System Modeling and Control of Single-Phase Pv Flexible Grid-Connected." Advanced Materials Research 960-961 (June 2014): 1367–70. http://dx.doi.org/10.4028/www.scientific.net/amr.960-961.1367.

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Photovoltaic systems can not meet the needs in the power grid without the impact, due to its penriodicity, intermittent and randomness, thus the key to solve the core technology of photovoltaic power generation system is important to achieve PV grid-connected. This article explains the two-stage topology system control and modeling of single-phase PV grid-connected: Modeling of DC / DC converter provides basis for maximum power point tracking; DC / AC inverter in grid-connected modeling offer efficient communication basis for grid-connected, it research on the control strategies for DC / DC and DC / AC circuit: that PV grid-connected complete alternating current of unit power factor using the booster circuit and inverter control structure, in order to offer photovoltaic systems flexible grid-connected the foundation.

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Shinde, Akanksha S. "Single Phase to Three Phase Unified Power Quality Conditioner." INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 09, no. 04 (2025): 1–9. https://doi.org/10.55041/ijsrem45275.

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Mitigating power quality issues in distribution systems is of utmost importance to both electricity consumers and suppliers as it improves the distribution system’s efficiency, reduces electricity costs, maintains continuous supply, and diminishes the requirement for frequent maintenance. Custom power devices were introduced to eliminate power quality issues like voltage sags, swells, transients, imbalances, and current harmonics arising in distribution systems. Unified power quality conditioner (UPQC) is one such frequently used custom power device that enhances the power quality of distribution systems. Now days the usage of three phase loads is increasing gradually, therefore it is much required to get access to the three-phase distribution system. UPQC 1-ph-to-3-ph uses dual compensation principle makes possible to draw sinusoidal current, in phase with the grid voltage, from the single-phase grid to improve the power quality. The system compensates the voltage disturbances such as voltage sag, voltage swell and other voltage unbalances. The proposed system allows the balanced and regulated voltage with lower harmonic content. The present paper analyzes the compensation and control strategies using PI controller. The control strategies are simulated using MATLAB/SIMULINK. Keywords— Power quality (PQ), unified power quality conditioner (UPQC), Series and Shunt active power filter

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Gotekar, P. S., S. P. Muley, and D. P. Kothari. "A Single Phase Grid Connected PV System working in Different Modes." Engineering, Technology & Applied Science Research 10, no. 5 (2020): 6374–79. http://dx.doi.org/10.48084/etasr.3746.

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The current grid standards for the single-phase residential PV system expect it to operate at Maximum Power Point Tracking (MPPT) mode under normal operating conditions and to maintain the voltage profile whenever a grid fault occurs. The proposed system supplies power to the load under stable conditions and the PV system works in MPPT mode. When the fault occurs at the Point of Common Coupling (PCC) and the voltage is reduced, the proposed controller maintains the voltage profile by injecting the current fed by the current controller at the PCC. The controller shifts from MPPT to the faulty mode and maintains voltage as per grid requirements. During islanding conditions, the PV system successfully caters to the requirements of the load by shifting the control from MPPT to islanding mode. When the PV system is in operation the power quality is enhanced

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Gotekar, P. S., S. P. Muley, and D. P. Kothari. "A Single Phase Grid Connected PV System working in Different Modes." Engineering, Technology & Applied Science Research 10, no. 5 (2020): 6374–79. https://doi.org/10.48084/etasr.3746.

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The current grid standards for the single-phase residential PV system expect it to operate at Maximum Power Point Tracking (MPPT) mode under normal operating conditions and to maintain the voltage profile whenever a grid fault occurs. The proposed system supplies power to the load under stable conditions and the PV system works in MPPT mode. When the fault occurs at the Point of Common Coupling (PCC) and the voltage is reduced, the proposed controller maintains the voltage profile by injecting the current fed by the current controller at the PCC. The controller shifts from MPPT to the faulty mode and maintains voltage as per grid requirements. During islanding conditions, the PV system successfully caters to the requirements of the load by shifting the control from MPPT to islanding mode. When the PV system is in operation the power quality is enhanced

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Srun, Channareth, Phok Chrin, Sokchea Am, and Bunthern Kim. "Modeling and Simulation of a Double-Stage Single-Phase Grid-Connected PV System." EPI International Journal of Engineering 5, no. 1 (2022): 16–20. http://dx.doi.org/10.25042/epi-ije.022022.03.

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This paper presents the design model and simulation of a double-stage single-phase grid-connected PV system. This system includes an MPPT DC-DC boost power converter and a transformer-less single-phase DC-AC power inverter, which is connected to the power grid with an LCL filter. In the DC-DC boost converter, the Perturb and Observe algorithms are combined. The output voltage of the DC-DC converter is regulated, and the DC/AC output voltage is synchronized with the grid. The MATLAB-Simulink environment is used for the closed-loop simulation of the proposed setup. The simulation results are presented for various solar irradiance conditions and show that photovoltaic current is generated and matches the phase of grid voltage.

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Mollahasanoglu, Hakki, and Emre Ozkop. "Experimental and Simulated Investigation of a Single-Phase Transformerless H5 Inverter Topology." Jordan Journal of Electrical Engineering 10, no. 1 (2024): 103. http://dx.doi.org/10.5455/jjee.204-1683544600.

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This paper aims to simulate and experimentally apply a single-phase transformerless H5 inverter topology. The H5 inverter topology is simulated in MATLAB/Simulink environment as both off-grid and grid-connected. The simulation results of the grid-connected system are evaluated in terms of output voltage/current, total harmonic distortion (THD), and injected active and reactive powers into the grid. The off-grid system is evaluated regarding load current, inverter output voltage, efficiency, and THD. Despite the variable output load, the results offer good THD values that comply with the IEEE 1547 standard. Additionally, experimental studies are conducted on the single-phase off-grid transformerless H5 inverter. A digital processing unit is utilized to control and display the output voltage of the H5 inverter system in real-time mode. PI and Fuzzy PI controllers are used for output voltage control. The obtained results reveals that the investigated topology outperforms its counterparts.

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Machado, Eubis Pereira, Adeon Cecílio Pinto, Rodrigo Pereira Ramos, et al. "Modeling, Control and Validation of a Three-Phase Single-Stage Photovoltaic System." Energies 17, no. 23 (2024): 5953. http://dx.doi.org/10.3390/en17235953.

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The central inverter topology presents some advantages such as simplicity, low cost and high conversion efficiency, being the first option for interfacing photovoltaic mini-generation, whose shading and panel orientation studies are evaluated in the project planning phase. When it uses only one power converter, its control structures must ensure synchronization with the grid, tracking the maximum power generation point, appropriate power quality indices, and control of the active and reactive power injected into the grid. This work develops and contributes to mathematical models, the principles of formation of control structures, the decoupling process of the control loops, the treatment of nonlinearities, and the tuning of the controllers of a single-stage photovoltaic system that is integrated into the electrical grid through a three-phase voltage source inverter. Using the parameters and configurations of an actual inverter installed at the power plant CRESP (Reference Center for Solar Energy of Petrolina), mathematical modeling, implementation, and computational simulations were conducted in the time domain using MatLab® software (R2021b). The results of the currents injected into the grid, voltages, active powers, and power factor at the connection point with the grid are presented, analyzed, and compared with real measurement data during one day of operation.

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Salem, Mahmoud Ahmed, Yousry Abdel Gawad Atia, and Osama Mohamed Arafa. "Improved MPPT control for single-phase grid-connected PV system." International Journal of Power and Energy Conversion 12, no. 1 (2021): 1. http://dx.doi.org/10.1504/ijpec.2021.113037.

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Iniya, V., P. Maniraj, S. Anushiya, et al. "Reactive Power Control of Single Phase Grid Connected Photovoltaic System." IOP Conference Series: Materials Science and Engineering 1055, no. 1 (2021): 012130. http://dx.doi.org/10.1088/1757-899x/1055/1/012130.

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Yüksel, Ahmet, and Emre Özkop. "Control of Single Phase Grid Connected Transformerless PV Inverter System." Pamukkale University Journal of Engineering Sciences 25, no. 2 (2019): 143–50. http://dx.doi.org/10.5505/pajes.2019.93275.

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Jain, Niharika, and Santosh Kumar. "ANALYSIS OF SINGLE PHASE MLI FOR GRID CONNECTED PV SYSTEM." International Journal of Technical Research & Science Special, Issue2 (2020): 25–35. http://dx.doi.org/10.30780/specialissue-electricalsystem/004.

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Yüksel, Ahmet, and Emre Özkop. "Control of Single Phase Grid Connected Transformerless PV Inverter System." Pamukkale University Journal of Engineering Sciences 25, no. 2 (2019): 143–50. http://dx.doi.org/10.5505/pajes.2018.93275.

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Moyal, Dr Arun. "Modeling and Simulation of Single Phase Grid Connected Photovoltaic System." International Journal of Innovative Research in Engineering & Multidisciplinary Physical Sciences 8, no. 6 (2020): 97–106. http://dx.doi.org/10.37082/ijirmps.2020.v08i06.010.

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Lai, KhacLai, DanhHoang Dang, and XuanMinh Tran. "Modeling and control the grid-connected single-phase photovoltaic system." International Journal of Electrical and Electronics Engineering 4, no. 6 (2017): 51–56. http://dx.doi.org/10.14445/23488379/ijeee-v4i6p110.

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Arafa, Osama Mohamed, Yousry Abdel Gawad Atia, and Mahmoud Ahmed Salem. "Improved MPPT Control for Single-phase Grid-Connected PV System." International Journal of Power and Energy Conversion 1, no. 1 (2020): 1. http://dx.doi.org/10.1504/ijpec.2020.10030092.

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B.Mujumdar, Uday. "PLL for Grid Synchronization of Single Phase Distributed Generation System." IOSR Journal of Electrical and Electronics Engineering 11, no. 05 (2016): 28–33. http://dx.doi.org/10.9790/1676-1105032833.

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Rahim, Nasrudin A., Krismadinata Chaniago, and Jeyraj Selvaraj. "Single-Phase Seven-Level Grid-Connected Inverter for Photovoltaic System." IEEE Transactions on Industrial Electronics 58, no. 6 (2011): 2435–43. http://dx.doi.org/10.1109/tie.2010.2064278.

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PANDA, AUROBINDA, M. K. PATHAK, and S. P. SRIVASTAVA. "A single phase photovoltaic inverter control for grid connected system." Sadhana 41, no. 1 (2016): 15–30. http://dx.doi.org/10.1007/s12046-015-0459-2.

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Shan, Hong Tao, and Bin Zhou. "The Effect of Digital Process of Single-Phase Photovoltaic Grid Connected Inverter." Advanced Materials Research 1070-1072 (December 2014): 60–63. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.60.

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Digital control possesses evident advantages and has become a mainstream control of photovoltaic grid connected inverter.The mathematical model and parameter setting of the single phase photovoltaic grid connected inverter with L filter was introduced in the paper.It was analysed on the effect on system stability of digital process from the two aspects which were the zero-order-hold and one-step-delay control. The bode diagram was verified the theoretical analysis on system stability.The conclusions were made that the introduction of digital control reduces the critical stable gain of photovoltaic grid connected inverter system,system stability is varied with sample time, the parameters of L can affect the system stability range,zero-order-hold reduces the stability range and limits the performance improved of digital control system,one-step-delay control on photovoltaic grid connected inverter reduces again the stability range on the basis of the zero-order-hold control.

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Barcellona, Simone, Marzio Barresi, and Luigi Piegari. "MMC-Based PV Single-Phase System with Distributed MPPT." Energies 13, no. 15 (2020): 3964. http://dx.doi.org/10.3390/en13153964.

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The presence and evolution of static power converters in electric grids are growing on a daily basis. Starting from the most used voltage source converter (VSC), passing through the use of multilevel converters, the most recent configuration is the so-called modular multilevel converter (MMC). Because of its intrinsic advantages, it is used not only in high-voltage systems but also in low- and medium-voltage ones to interface renewable energy sources such as photovoltaic (PV) panels. Several configurations and maximum power point tracker (MPPT) algorithms have been proposed and analyzed for MMC-PV-based systems. However, when using distributed MPPTs, partial shading conditions cause a problem. The PV panel can be directly connected to the MMC using its dc link or submodule. Based on this configuration, this paper proposes a novel control strategy that tracks both the ac grid current and ac circulating current for a single-phase low-voltage system to obtain the maximum power under any irradiance condition. The effectiveness of the proposed control strategy is demonstrated through time-domain simulation results.

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Daniel A Figueiredo and Sanjay S Pawar. "Single Phase Transformer Less Inverter for Grid Connected Photo Voltaic System." International Journal of Scientific Research in Science and Technology 11, no. 2 (2024): 463–68. http://dx.doi.org/10.32628/ijsrst2412344.

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Sustainable power generation systems have been developed as a result of increased consumption of energy, the rapid depletion of fossil fuels, and environmental degradation worldwide. Thus, the demand for photovoltaic systems is increasing, owing to the increased need for renewable resources worldwide. Transformers are often used in photovoltaic systems to offer voltage ratio conversions between input and output along with galvanic isolation. The inverter, that may be a transformer-less or with a transformer, is the enabling technology in PV systems. But, the efficiency and power density of these traditional iron and copper-based transformers are decreased while the inverter's weight, size, and cost are increased. Thus, it is recommended to refrain from utilizing transformers within the inverter. For this reason, transformer-less inverters for grid-tied, low-voltage, single-phase photovoltaic (PV) systems have gained more attention thesedays. To comply with the safety requirements imposed by grid regulations, there are a few distinctive challenges, particularly with respect to leakage current problems, which need to be sufficiently handled. Owing to this In recent years, distributed solar grid-tied systems have made widespread use of single phase transformerless Voltage Source Inverters. This paper explores a novel transformer-less solar inverter for grid connected PV system and Results are investigated in MATLAB Simulink provided a significant reduction in distortion in voltage and current at load side.

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Journal articles on the topic 'Single-phase grid system'

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