Performance analysis of photovoltaic inverter system for predicting energy yield

Sawangsri, Watcharapan; Kongcharoen, Jinda; Boonnam, Nathaphon

doi:10.1016/j.egyr.2022.01.078

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…The rated capacity of the equivalent inverter should be the sum of the rated capacity of all photovoltaic inverters, and the impedance should be the equivalent impedance of all photovoltaic inverters connected in parallel [11,12]. Since the inverter models are the same in the same photovoltaic power station, the multiplication method can be used to calculate the parameters.…”

Section: Equivalent Value Of Pv Inverter Parametersmentioning

confidence: 99%

Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Yin

2023

The Journal of Engineering

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With the centralized access of large capacity and high proportion of new energy to the power grid, the power structure has undergone great changes, and the fast frequency response resources available to the power grid have gradually decreased. If high-power DC blocking occurs, it will pose a serious threat to the frequency security of the power grid, and the frequency regulation pressure of the power grid and the risk of safe operation will continue to increase. To this end, a fast frequency response technology for photovoltaic power plants based on equivalent modelling is proposed. According to the principle of equivalent modelling, the equivalent model of a single unit of photovoltaic power station is established through the parameters of photovoltaic array, photovoltaic inverter, unit transformer, unit transformer and collector line. According to the fast frequency response performance requirements of photovoltaic power plants, combined with the characteristics of photovoltaic power plants, a feasible scheme for fast frequency response of photovoltaic power plants is introduced. The case study on the implementation of fast frequency response project in photovoltaic power station shows that according to the order and type of AGC command and fast frequency response command, photovoltaic power station has conducted command superposition tests under 50 ±0.2 Hz and 50 ±0.09 Hz disturbance amplitudes respectively, and the results are qualified. The integration of automatic generation control/automatic voltage control (AGC/AVC) and fast frequency response function of photovoltaic power station is realized by using relevant technologies, so that the photovoltaic power station can actively support the grid frequency and voltage.

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Section: Equivalent Value Of Pv Inverter Parametersmentioning

confidence: 99%

Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Yin

2023

The Journal of Engineering

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“…Grid-connected inverters are a key part of photovoltaic power generation systems. They play a crucial role in directly connecting solar power generation units to the grid, and their performance directly affects the quality of the final current [ 3 – 5 ].…”

Section: Introductionmentioning

confidence: 99%

LADRC-based grid-connected control strategy for single-phase LCL-type inverters

Feng,

Zhou,

Wang

et al. 2024

PLoS ONE

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To ensure that grid-connected currents are of high quality, it is crucial to optimize the dynamic performance of grid-connected inverters and their control. This study suggests using a combination of reduced-order linear active disturbance rejection control (LADRC) and a Proportional-Integral (PI) controller. By applying this control strategy to a single-phase photovoltaic grid-connected system, the system’s ability to suppress grid harmonics is significantly improved. The validity and effectiveness of this control approach have been confirmed through simulations and experiments. The results show that the LADRC-based control system is robust and capable of rejecting disturbances, resulting in a significant reduction in the Total Harmonic Distortion (THD) of grid-connected currents. Comparative analysis with traditional control methods demonstrates the superior performance of the proposed approach.

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Performance analysis of photovoltaic inverter system for predicting energy yield

Cited by 2 publications

References 10 publications

Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Fast frequency response technology of photovoltaic power plant based on equivalent modelling

LADRC-based grid-connected control strategy for single-phase LCL-type inverters

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