Evaluating Technical Requirements to Achieve Maximum Power Point in Photovoltaic Powered Z-Source Inverter

Mirazizi, H. Rahimi; Shafiyi, Mohamad Agha

doi:10.5829/ije.2018.31.06c.09

Cited by 6 publications

(6 citation statements)

References 0 publications

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“…Among the available modulation schemes for the switching PWM has many advantages such as lower power loss with respect to switching and snubber while maintaining the dv/dt rating quite small. As for the fundamental frequency, there are two well-known switching techniques, one is Selective Harmonic Elimination (SHE) [24] and the other is NLC [25][26][27][28][29][30]. In the SHE technique, increasing the number of output levels creates a large volume of offline computational costs with respect to switching angles and their storage.…”

Section: Nearest Level Control (Nlc)mentioning

confidence: 99%

A Novel 19-Level Boost Type Switched-capacitor Inverter with Two DC Sources and Reduced Semiconductor Devices

Sagvand

Siahbalaee

Koochaki

2023

IJE

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In this paper, a novel voltage-boosting switched-capacitor multilevel inverter (SCMLI) capable of producing 19 voltage levels using a combination of only 10 switches, 4 diodes, 2 capacitors, and 2 DC sources has been proposed. The main features of the proposed topology are 1) utilization of a very low number of devices, 2) very low Total Standing Voltage (TSV) equal to 6.55 and 3) self-balance property of the capacitors' voltages. In order to provide the IGBTs of the circuit with the desired switching signals, the Nearest Level Control (NLC) method has been adopted. To clarify the benefits of the designed topology as to the total quantity of switches, DC sources, capacitors as well as the total standing voltage (TSV), and converter boosting, a thorough comparison has been carried out versus the recently published 19-level topologies. Also, for the purpose of performance evaluation and validation, the suggested topology has been tested against various loads through an experimental setup in the laboratory using TMS320F28379D DSP as the processor. The comparative, simulation, and experimental results all imply the superiority of the proposed topology against its predecessor counterparts.

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Section: Nearest Level Control (Nlc)mentioning

confidence: 99%

A Novel 19-Level Boost Type Switched-capacitor Inverter with Two DC Sources and Reduced Semiconductor Devices

Sagvand

Siahbalaee

Koochaki

2023

IJE

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“…A new version of the band-pass SOGI-FLL (Figure 5) filter [17][18][19] designated as MSOGI-FLL can be proposed by including the DSC operator. A grid signal polluted with a DC-offset, MSOGI transfer functions is represented as follows for comprehension purposes: In order to filter out low and high-frequency components in the input signals, gain k must be properly tuned.…”

Section: Structure and Transfer Functions : Msogi-fllmentioning

confidence: 99%

Modified Second Order Generalized Integrator-frequency Locked Loop Grid Synchronization for Single Phase Grid tied System Tuning and Experimentation Assessment

Brahmbhatt¹,

Chandwani

2022

IJE

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T he phase-locked loop (PLL) is applied in grid-tied systems to synchronise converter operation with grid voltage, affecting converter stability and performance. Synchronous reference frame PLL (SRF-PLL) is a popular grid synchronisation method due to its simplicity and reliability. Normal SRF-PLL cannot suppress DC offset, causing basic frequency and phase oscillations.When a grid is irregular, its bandwidth should be reduced to ensure acceptable disturbance rejection without sacrificing detection speed. T o enhance the phase-angle estimation speed and accuracy, the researchers modified structure by adding the pre/in-loop filter in advanced PLLs.The capacity to deliver improved dynamic response and reduced settling time without compromising system stability or the ability to eliminate disturbances is a major issue for PLLs. Among different control methods, SOGI-FLL (second-order generalised integrator-based frequency locked loop) had the best performance. It tracks grid voltage frequency precisely even when there is harmonics,voltage variations, frequency fluctuations, etc. In the event of a dc offset, the calculated frequency incorporates low frequency oscillations. A modified second-order generalised integrator frequency-locked loop (MSOGI-FLL) is presented in this work to address grid voltage anomalies of all types, including dc offset. Using the Waijung Block-set of MAT LAB/Simulink, a Modified SOGI-FLL is realized and evaluated by applying abnormal grid voltage situations using a low-cost DSP-based ST M32F407VGT microcontroller. T he results demonstrate MSOGI-better FLL's performance in harsh circumstances.

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“…The power generated in a PV module depends on the amount of irradiation and its temperature. Therefore, with changing weather conditions, the output power changes [3]. The I-V characteristic of PV modules is nonlinear and has a specific point at which the power has its maximum value.…”

Section: Introductionmentioning

confidence: 99%

Irradiation and Temperature Estimation with a New Extended Kalman Particle Filter for Maximum Power Point Tracking in Photovoltaic Systems

Hooshmand

Yaghobi

Jazaeri

2023

IJE

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In this paper, a new method, based on the estimation of irradiation and temperature values, was proposed for Maximum Power Point Tracking (MPPT) in photovoltaic systems. The proposed estimation method is based on a new Extended Kalman Particle Filter (EKPF). Given that the basis of the proposed method is a particle filter, firstly, the estimation is performed with high accuracy, although the target system has severe nonlinearity; secondly, there is no limitation for the probability density functions of the measurement and process noise. This method works for Gaussian and non-Gaussian noises. To show the estimation accuracy, the proposed method will be compared with the common method based on extended Kalman filter (EKF) and both methods will be evaluated due to the root means square error criterion. Due to the accurate estimation, MPPT is performed with good performance. For validation, the proposed MPPT method was compared with the EKF method and the conventional incremental conductance (InC) method. The simulations show that the efficiency is improved from 0.1% to 1% compared to the EKF, and from 0.8% to 8.65% compared to the InC method, which shows the performance of the proposed MPPT method in noisy environments.

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Evaluating Technical Requirements to Achieve Maximum Power Point in Photovoltaic Powered Z-Source Inverter

Cited by 6 publications

References 0 publications

A Novel 19-Level Boost Type Switched-capacitor Inverter with Two DC Sources and Reduced Semiconductor Devices

A Novel 19-Level Boost Type Switched-capacitor Inverter with Two DC Sources and Reduced Semiconductor Devices

Modified Second Order Generalized Integrator-frequency Locked Loop Grid Synchronization for Single Phase Grid tied System Tuning and Experimentation Assessment

Irradiation and Temperature Estimation with a New Extended Kalman Particle Filter for Maximum Power Point Tracking in Photovoltaic Systems

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