5. Conclusion In this paper, a T-type three-level grid-connected inverter is used as the interface between the distributed power supply and the power grid, and the parameter design of the current double closed-loop control system is given, and the grid-connected control strategy is simulated.
In view of the disadvantages of the slow response speed of the traditional current control and the failure to eliminate the influence of the LCL filter on the grid-connected current by using current PI control alone, a current double closed loop PI current tracking control is proposed.
When the inverter side current is used for closed-loop control, the phase difference between the grid connected current and the grid voltage will be caused due to the filter capacitor, and the power factor will be reduced , and the LCL resonance peak cannot be well suppressed.
Through the theoretical analysis of the grid-connected inverter control principle, the grid-connected inverter control model is designed, and the transfer function model of each control link is deduced, and the current loop PI regulator is designed at last. The simulation results show that the control strategy is feasible. 1. Introduction
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The three-phase inverter is a crucial component for integrating photovoltaic power generation into the grid. Its performance directly impacts the stability and power quality of grid …
Parameter Design of Current Double Closed Loop for T-Type Three-Level Grid-Connected Inverter Tiankui Sun1,*, Mingming Shi1, Xiaolong Xiao1, Ping He1, Yu Ji1 and …
The growing integration of photovoltaic (PV) power into the grid has brought on challenges related to grid stability, with the boost converter and the inverter introducing …
Grid-connected inverter is an important part of the grid-connected system. Compared with the traditional L or LC filter, LCL filter has a better high-frequency harmonic attenuation performance.
Magnetic integrated LCL filter design for a 2.5 kW three‐phase grid‐connected inverter with double closed‐loop control
This project focuses on designing and simulating a three-phase inverter intended for grid-connected renewable energy systems …
Current double closed loop control strategy is used in three-phase grid-connected inverter with LCL filter and the feedback quantity is the filter capacitor current I and the grid-
1 Overview Three-phase PV inverters are generally used for off-grid industrial use or can be designed to produce utility frequency AC for connection to the electrical grid. This …
Abstract To reduce current harmonics caused by switching frequency, T-type grid-connected inverter topology with LCL filter is adopted. In view of the disadvantages of the slow …
In the meantime, the current double closed-loop control strategy used in the system is introduced in detail. Finally, the simulation model is built by Matlab / Simulink simulation platform to verify …
This paper has analyzed in detail the implementation principles and process of the three-phase LCL grid-tied inverter, and has adopted the dual closed-loop feedforward control …
This paper innovatively uses script module programming of plecs software to build the SVPWM modulation module which drive the three-phase inverter while realizing the closed …
Grid-connected inverter is an important part of the grid-connected system. Compared with the traditional L or LC filter, LCL filter has a better high-frequency harmonic …
Grid-connected inverter is an important part of the grid-connected system. Compared with the traditional L or LC filter, LCL filter has a better high-frequency harmonic …
A double loop control method is developed in this paper for a grid connected three phase inverter. The SVPWM strategy is developed to reduce the THD of inverter output voltage.
To reduce current harmonics caused by switching frequency, T-type grid-connected inverter topology with LCL filter is adopted. In view of the disadvantages of the slow response …
This paper first analyzes the effect of passive damping method on the resonance peak; then a double closed-loop control strategy with the inner loop of capacitor current and …
In the meantime, the current double closed-loop control strategy used in the system is introduced in detail. Finally, the simulation model is built by Matlab/Simulink simulation platform to verify …
Aiming at the resonance peak problem existing in the LCL type three-phase photovoltaic inverter grid-connected system, this paper proposes a dual current control …
This study first analyses and compares the suppression effects of passive damping methods on the resonance peak of the LCL filter; then, a double-current closed-loop control …
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