A Composite Power Decoupling Method for a PV Inverter With Optimized Energy Buffer
| Autor: | Zhaoxia Yang, Vincent Winstead, Qun Zhang, Dianzhi Yu, Zhe Zhang, Jianwu Zeng |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Ripple Photovoltaic system Capacitance Industrial and Manufacturing Engineering Maximum power point tracking Power (physics) law.invention Capacitor Control and Systems Engineering Control theory law Electrical and Electronic Engineering business Solar power Decoupling (electronics) |
| Zdroj: | IEEE Transactions on Industry Applications. 57:3877-3887 |
| ISSN: | 1939-9367 0093-9994 |
| DOI: | 10.1109/tia.2021.3079162 |
| Popis: | A composite passive and active power decoupling method is proposed and optimized for a photovoltaic (PV) inverter. The proposed composite power decoupling (CPD) method has the following merits: 1) the dc side passive power decoupling (DC-PPD) can be automatically activated/deactivated according to the solar power to maintain more than 99% maximum power point tracking efficiency and low total harmonic current distortion (THDi); 2) the film capacitor with high reliability can be used due to the optimization of the energy buffer, e.g., a reduction of 52% and 23% in capacitance (or buffer energy) compared to DC-PPD and ac side active power decoupling, respectively; 3) control scheme developed in the d-q frame has more simple structure and requires less measurements than the existing methods. The experimental results show that the proposed CPD can dynamically control the dc-link voltage ripple under various conditions such as the abrupt change of the solar power and the load. Besides, low dc-link voltage ripple and low THDi are achieved in both steady-state and transient periods. Particularly when the solar power is less than 74%, the proposed CPD (with 261 μ F) has better performance than the traditional used PPD (with 1120 μ F). This article is accompanied by a video demonstrating the parameters optimization and measured waveforms. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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