Study on the Unbalanced Current Injection Capability of Grid-Connected Photovoltaic Neutral-Point-Clamped Inverter

被引：0
|
作者：
Tafti, Hossein Dehghani [1 ]
Maswood, Ali Iftekhar [1 ]
Kandasamy, Karthik [1 ]
Lim, Ziyou [1 ]
Ooi, Gabriel H. P. [1 ]
Konstantinou, Georgios [2 ]
Pou, Josep [2 ]
机构：
[1] Nanayang Technol Univ, Sch Elect & Elect Engn, Singapore, Singapore
[2] Univ New South Wales, Sch Elect Engn & Telecommun, Sydney, NSW, Australia
来源：
2016 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) | 2016年
关键词：
Fault-ride-through capability; photovoltaic power plant; three-leg four-wire grid connected neutral-point-clamped inverter; unbalanced reactive current injection; proportional resonant controller; three-dimensional space vector modulation; DISTRIBUTED GENERATION INVERTERS; CONVERTERS;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Due to high penetration of distributed generation units in power system, fault ride through (FRT) capability is one of the new requirements of the medium-scale grid-tied photovoltaic power plants (PVPPs). This paper proposes and investigates a control strategy for the neutral-point-clamped (NPC) inverter in order to inject proper unbalanced reactive currents to the grid during unbalanced grid faults. The proper unbalanced current injection reduces negative sequence of grid voltages and currents. The current references are scaled up/ down individually, based on the grid phase rms voltages and inverter nominal current. The performance of the implemented control algorithm is investigated on a 150-kVA PVPP connected to 12.47-kV medium-voltage grid simulation model under various voltage sag conditions. Results from an experimental setup of grid-tied NPC inverter are presented in order to demonstrate the effectiveness of the proposed unbalanced current injection algorithm.
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页数：6
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