- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 China International Conference on Electricity Distribution (CICED) - Tianjin (2018.9.17-2018.9.19)] 2018 China International Conference on Electricity Distribution (CICED) - Analysis on Operation Characteristics of Grid - Connected Inverter in Photovoltaic Power Generation
摘要： These instructions give you guidelines for IEEE TRANSACTIONS and preparing papers JOURNALS. Use this document as a template if you are using Microsoft Word 6.0 or later. Otherwise, use this document as an instruction set. The electronic file of your paper will be formatted further at IEEE. Define all symbols used in the abstract. Do not cite references in the abstract. Do not delete the blank line immediately above the abstract; it sets the footnote at the bottom of this column.
关键词： grid - connected,Photovoltaic grid – connected,control strategy,inverter
更新于2025-09-23 15:21:01
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Harmonic detection method based on adaptive noise cancellation and its application in photovoltaic - active power filter system
摘要： The adaptive harmonic detection method based on the adaptive noise cancellation principle has the advantages of strong adaptability and good robustness. However, when the step size of the algorithm is selected, there is a conflict between the convergence speed and the steady-state accuracy. To solve this problem, this paper proposes an improved variable step size adaptive harmonic detection method. The algorithm uses the sliding integrator to find the feedback that can truly reflect the tracking situation, and substitutes it into the step size iteration formula based on L2 norm to achieve the step size adjustment. In order to further verify the superiority and practicability of the improved algorithm, the algorithm is applied to the photovoltaic-active power filter (PV-APF) system, and simulation verification is performed in MATLAB. The simulation results show that under the same simulation conditions, the convergence speed of the improved algorithm is half a cycle faster than that of the traditional method, and the steady-state error is smaller. In the application of PV-APF system, under normal light, the dual functions of grid-connected photovoltaic system and harmonic compensation are realized. The total harmonic distortion (THD) of the system is 2.09%, which effectively improves the power quality of photovoltaic system.
关键词： Photovoltaic grid-connected,Adaptive noise cancellation,Harmonic detection,Active power filter,Photovoltaic-active power filter system
更新于2025-09-23 15:21:01
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Single-phase photovoltaic grid-connected inverter for predictive control method with power feed-forward
摘要： In the traditional photovoltaic grid-connected inverter control, there are problems such as slow system response speed, low stability and grid-connected current distortion. In this regard, a novel current prediction control method for grid-connected inverter with power feed-forward is proposed. The method consists of DC voltage outer loop control, current predictive control, power feed-forward and grid voltage feed-forward. The characteristic is that the current prediction control algorithm derived from the state equation of the grid-connected inverter effectively suppresses the influence of DC voltage fluctuation on the grid-connected current and enhances the robustness of the system; the introduction of power feed-forward accelerates the dynamic response of the system; The introduction of grid voltage feed-forward reduces voltage distortion or current distortion. And the traditional PI control module is not needed, the structure is simple, and the circuit is easy to implement. Matlab/Simulink simulation model and experimental results prove the effectiveness of the proposed control method, which is more practical than the traditional double loop control method.
关键词： predictive control,power feed-forward,photovoltaic grid-connected inverter,grid voltage feed-forward,current prediction control
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Chengdu, China (2019.5.21-2019.5.24)] 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - A strategy for suppressing the second harmonic of output power for photovoltaic grid-connected inverters with low voltage ride-through
摘要： When an unbalanced voltage drop occurs in the grid system, output power of distributed photovoltaic grid-connected system will generate second harmonics. In order to suppress the second harmonic, a new low voltage ride-through control strategy is proposed, which can adjust the harmonic suppression target according to the degree of voltage drop. This strategy can suppress the second harmonic of active power when the voltage drop is low, and suppress the second harmonic of reactive power when the voltage drop is large. The control strategy is simulated in MATLAB, and the results testified its effectiveness.
关键词： Photovoltaic grid-connected system,Harmonic suppression,Low voltage ride-through,Unbalanced voltage drop
更新于2025-09-11 14:15:04
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[IEEE 2018 International Power Electronics Conference (IPEC-Niigata 2018 –ECCE Asia) - Niigata, Japan (2018.5.20-2018.5.24)] 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia) - A Novel Single- Stage High-Frequency Boost Inverter Cascaded by Rectifier-Inverter System for PV Grid-Tie Applications
摘要： This paper proposes a new topology for a single-phase grid-tie two-stage DC-AC boost inverter for the application of PV systems that utilize high-frequency transformer (HFT) for galvanic isolation. In the first stage, a new single-stage high-frequency boost inverter (HFBI) is proposed to boost and convert the DC output voltage of the PV modules to a high-frequency single-phase square waveform and to realize maximum power point tracking (MPPT). The second stage is rectifier-inverter system (RIS) that interfaces HFBI to the grid. Therefore, a single-phase high-frequency transformer is used to link both stages and to provide galvanic isolation between the AC and DC sides. The proposed topology has many advantages such as increasing the inverter output voltage level, MPPT, high reliability, small size and lightweight. In addition, a proportional integral current control (PI) conventional is used to inject a sinusoidal current into the grid at unity power factor. The proposed topology has been verified analytically by using PSIM software and experimentally by using a laboratory prototype.
关键词： high frequency transformer,boost inverter,photovoltaic,grid connected
更新于2025-09-09 09:28:46