General Control Scheme for a Dual-Input Three-Level Inverter

被引：28
|
作者：
Yan, Cheng [1 ]
Xu, Dehong [1 ]
Chen, Wenjie [2 ]
机构：
[1] Zhejiang Univ, Coll Elect Engn, Inst Power Elect, Hangzhou 310027, Peoples R China
[2] Sungrow Power Supply Co Ltd, Hefei 518057, Anhui, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2019年 / 34卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Inverters; power control; pulsewidth modulation (PWM); voltage control; DISCONTINUOUS PWM; VOLTAGE-BALANCE; MODULATION; SEQUENCE; CONVERTER; INJECTION; STRATEGY;
D O I：
10.1109/TPEL.2018.2829903
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper proposes a general control scheme for the dual-input three-level inverter, which comes from a neutral point clamped three-level inverter. It can be used for photovoltaic (PV) systems or battery storage systems with two dc sources. The dual-input three-level inverter can be connected with two PV arrays, which are able to realize maximum power point tracking independently. First, the dynamic model of the dual-input three-level inverter is established, which describes the relationship between the dual-input voltages and the duty cycle. After discussing the control theory of the dual-input voltages, a typical control scheme is proposed. The design of a control loop is introduced in details. Afterward, modulation and restriction of the proposed method are discussed. Finally, experiment on a 125 kW dual-input three-level PV inverter is implemented to verify the validity and feasibility of the proposed method.
引用
收藏
页码：1838 / 1850
页数：13
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