Journal ArticleDOI
A Day and Night Operational Quasi-Z Source Multilevel Grid-Tied PV Power System to Achieve Active and Reactive Power Control
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TLDR
Simulation and experimental results validate the day and night operational ES-qZS-CHB inverter and the proposed optimal control technique, which aims to achieve optimal combination of Dn and Mn.Abstract:
A day and night operational single-phase energy stored quasi-Z-source-cascaded H-bridge (ES-qZS-CHB) inverter photovoltaic (PV) power system to achieve the active and reactive power control is proposed in this article. The ES-qZS-CHB inverter PV power system usually employs the unity power factor control method to ensure the output current tracking the desired reference in phase with the grid voltage, combining with distributed maximum power point tracking (MPPT) to determine the values of shoot-through duty ratios Dn . These cannot operate at night because there is no PV power input. Meanwhile, as multiple combinations of Dn and modulation ratio Mn could achieve the same voltage gain at night operation, but which is optimal has not been addressed. This article proposes a solution to address these issues. First, a comprehensive control scheme, which not only has the attractiveness of day and night operation but also shows the advantage of active and reactive power control simultaneously, is proposed; then, an optimization control method is proposed for night operational ES-qZS-CHB inverter to achieve optimal combination of Dn and Mn . Simulation and experimental results validate the day and night operational ES-qZS-CHB inverter and the proposed optimal control technique.read more
Citations
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Journal ArticleDOI
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Flexible Active Power Control of Distributed Photovoltaic Systems With Integrated Battery Using Series Converter Configurations
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Proceedings ArticleDOI
Direct Active and Reactive Power Control for Grid-Connected PEC9 Inverter Using Finite Control Set Model Predictive Method
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Journal ArticleDOI
Proportional Hysteresis Band Control for DC Voltage Stability of Three-Phase Single-Stage PV Systems
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Journal ArticleDOI
Power Scheduling Method for Grid Integration of a PV-BESS CHB Inverter With SOC Balancing Capability
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References
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Journal ArticleDOI
Modeling and Control of Quasi-Z-Source Inverter for Distributed Generation Applications
TL;DR: Detailed modeling and control issues of the qZSI used for distributed generation (DG), such as PV or fuel cell power conditioning, are addressed and constant capacitor voltage control method is proposed in a two-stage control manner.
Journal ArticleDOI
The Balance of Renewable Sources and User Demands in Grids: Power Electronics for Modular Battery Energy Storage Systems
TL;DR: In this article, the grid integration, as well as the optimal usage of volatile energy reserves, is presented for a 5- kW PV system for home application, and for a 100- MW medium-voltage system, intended for wind farm usage.
Journal ArticleDOI
Coordinated Control of Grid-Connected Photovoltaic Reactive Power and Battery Energy Storage Systems to Improve the Voltage Profile of a Residential Distribution Feeder
TL;DR: Results show that reactive compensation from PV inverters alone is sufficient to maintain acceptable voltage profile in an urban scenario, whereas coordinated PV and BES support is required for the rural scenario (high-resistance feeder).
Journal ArticleDOI
An Energy-Stored Quasi-Z-Source Inverter for Application to Photovoltaic Power System
Baoming Ge,Haitham Abu-Rub,Fang Zheng Peng,Qin Lei,A.T. de Almeida,Fernando J. T. E. Ferreira,Dongsen Sun,Yushan Liu +7 more
TL;DR: Two strategies are proposed with the related design principles to control the new energy-stored qZSI when applied to the PV power system and prove the effectiveness of the proposed control of the inverter's input and output powers and battery power regardless of the charging or discharging situation.
Journal ArticleDOI
Decoupled Active and Reactive Power Control for Large-Scale Grid-Connected Photovoltaic Systems Using Cascaded Modular Multilevel Converters
TL;DR: In this paper, a decoupled active and reactive power control strategy was proposed to enhance system operation performance in large-scale grid-connected photovoltaic (PV) systems.