Power Quality Improvement in Solar Fed Cascaded Multilevel Inverter With Output Voltage Regulation Techniques

Stonier, Albert Alexander; Murugesan, S.; Samikannu, Ravi; Venkatachary, Sampath Kumar; Kumar, Suresh; Arumugam, Prakash

doi:10.1109/access.2020.3027784

Cited by 48 publications

(11 citation statements)

References 45 publications

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“…e dataset acquired for the ANN training is determined by deriving the harmonic elimination equation as presented in (8) to (10).…”

Section: Formulation Of Ann Algorithmmentioning

confidence: 99%

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Power Quality Improvement in a Solar PV Assisted Microgrid Using Upgraded ANN-Based Controller

Stonier¹,

Harish²,

Murugesan³

et al. 2022

Mathematical Problems in Engineering

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This paper proposes the design of a controller using the artificial neural network (ANN) for a solar photovoltaic (PV)-fed cascaded multilevel inverter (CMLI) to enhance the power quality. The objective of this presented ANN controller is to obtain a maximum output voltage with no filter components. This paper also investigates and eliminates the voltage harmonics that occurred in a solar-fed cascaded 3-stage inverter using various techniques such as pulse width modulation (PWM), digital logic control (DLC), fuzzy logic controller (FLC), and ANN, and the results are compared. Based on the results, the proposed ANN-based controller efficiently reduces harmonics and improves the power quality. This is achieved by solving the harmonic equations and thereby changing the switching angles of each semiconductor to a minimum value. The ANN is trained by a dataset consisting of varying input voltage and switching angles. The simulation was performed using MATLAB/Simulink for different types of controllers like PWM, DLC, FLC, and ANN for the 3-stage inverter. The simulated results are compared with the results obtained from a 3 kWp photovoltaic plant connected to the CMLI. Finally, on the basis of performance analysis, it was confirmed that the ANN-based controller effectively eliminates harmonics and improves the power quality.

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“…e dataset acquired for the ANN training is determined by deriving the harmonic elimination equation as presented in (8) to (10).…”

Section: Formulation Of Ann Algorithmmentioning

confidence: 99%

“…Stonier et al discussed the harmonics removal in the solar-fed cascaded multilevel inverter, which comprises 15 levels [8]. Here, the 3 kWp solar panel is fed by a 15-level multilevel inverter intended to enhance power quality problems in the microgrid.…”

Section: Introductionmentioning

confidence: 99%

Power Quality Improvement in a Solar PV Assisted Microgrid Using Upgraded ANN-Based Controller

Stonier¹,

Harish²,

Murugesan³

et al. 2022

Mathematical Problems in Engineering

Self Cite

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show abstract

“…According to (5), the derivative of the hybrid AC index (dj) is taken as 0, which can be obtained as:…”

Section: A the Modulation Strategy Of Third Harmonic Component Injectionmentioning

confidence: 99%

“…Solar energy as a representative of renewable energy, its production growth rate far exceeds that of other energy sources [1], [2]. To choose the appropriate inverter structure based on grid connected PV system and modulation strategy has become a research hotspot, which helps to improve the efficiency and dynamic stability of grid connected PV system [3]- [5].…”

Section: Introductionmentioning

confidence: 99%

DC Voltage Utilization Improvement to Enlarge Power Balance Constraint Range for Photovoltaic Cascaded Inverter

Wang

Zhang³

et al. 2021

IEEE Access

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In the three-phase photovoltaic (PV) cascaded inverter, the output power of PV arrays is not equal due to the difference of solar radiation, temperature and other factors, which leads to the over modulation of PV cascaded inverter. In order to solve the above problems, the carrier phase-shifted PWM (CPS-PWM) control strategy based on third harmonic injection is proposed in this paper, taking a singlestage high-frequency-link isolated cascaded PV inverter topology with clamping circuits as an example. It can not only improve the utilization of DC voltage, but also enlarge the power balance constraint range between the units in the phase of cascaded PV inverter, so as to ensure that all units can avoid over modulation under some serious power imbalance cases, and will not increase the third harmonic component injection of grid current. Firstly, the topology and working principle of the proposed inverter based on CPS-PWM control strategy are introduced. Then, the improved CPS-PWM control strategy which can improve the DC voltage utilization of the PV cascaded inverter is analyzed, and the control strategy of intra-phase power balance is emphatically analyzed in the overall control strategy of PV cascaded inverter system, and it is discussed that the proposed control strategy can also enlarge the power balance constraint range between the units of the cascaded inverter. Finally, the effectiveness of the proposed PV cascaded inverter based on the improved CPS-PWM control strategy is verified by the simulation and experimental results. INDEX TERMS PV cascaded inverter, DC voltage utilization, Power balance constraint.

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“…It is not desirable to have control over the DC-DC converter with the MPPT technique and hence various topologies are proposed to solve this issue for the standalone solar system. In the recent past, several advanced techniques like artificial intelligence (AI), practical swarm optimization (PSO), fuzzy and genetic algorithm (GA) to have an auto-control regarding the training data to regulate voltage [26]. The selection of the MPPT technique for a suitable application is an astonishing task where every method is having its own merits and demerits [27].…”

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confidence: 99%

A Novel Asymmetrical 21-Level Inverter for Solar PV Energy System With Reduced Switch Count

et al. 2021

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This article presents a novel asymmetrical 21-level multilevel inverter topology for solar PV application. The proposed topology achieves 21-level output voltage without H-bridge using asymmetric DC sources. This reduces the devices, cost and size. The PV standalone system needs a constant DC voltage magnitude from the solar panels, maximum power point tracking (MPPT) technique used for getting a stable output by using perturb and observe (P&O) algorithm. The PV voltage is boosted over the DC link voltage using a three-level DC-DC boost converter interfaced in between the solar panels and the inverter. The inverter is tested experimentally with various combinational loads and under dynamic load variations with sudden load disturbances. Total standing voltage with a cost function for the proposed MLI is calculated and compared with multiple topologies published recently and found to be cost-effective. A detailed comparison is made in terms of switches count, and sources count, gate driver boards, the number of diodes and capacitor count and component count level factor with the same and other levels of multilevel inverter and found to be the proposed topology is helpful in terms of its less TSV value, devices count, efficient and costeffective. In both simulation and experimental results, total harmonic distortion (THD) is observed to be the same and is lower than 5% which is under IEEE standards. A hardware prototype is implemented in the laboratory and verified experimentally under dynamic load variations, whereas the simulations are done in MATLAB/Simulink. INDEX TERMS Multilevel inverter, photovoltaic (PV) system, maximum power point tracking (MPPT), cost function (CF), TSV calculation, total harmonic distortion (THD).

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Power Quality Improvement in Solar Fed Cascaded Multilevel Inverter With Output Voltage Regulation Techniques

Cited by 48 publications

References 45 publications

Power Quality Improvement in a Solar PV Assisted Microgrid Using Upgraded ANN-Based Controller

Power Quality Improvement in a Solar PV Assisted Microgrid Using Upgraded ANN-Based Controller

DC Voltage Utilization Improvement to Enlarge Power Balance Constraint Range for Photovoltaic Cascaded Inverter

A Novel Asymmetrical 21-Level Inverter for Solar PV Energy System With Reduced Switch Count

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