Predictive Current Controlled 5-kW Single-Phase Bidirectional Inverter With Wide Inductance Variation for DC-Microgrid Applications
Predictive Current Controlled 5-kW Single-Phase Bidirectional Inverter With Wide Inductance Variation for DC-Microgrid Applications
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DOI：
10.1109/tpel.2010.2087773
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发表时间：
2010-10
影响因子：
6.7
通讯作者：
Tsai-Fu Wu;K. Sun;C. Kuo;Chih Chang
中科院分区：
文献类型：
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作者：
Tsai-Fu Wu;K. Sun;C. Kuo;Chih Chang
本文介绍了具有宽电感变化的 5 kW 单相双向逆变器的设计和实现。对于直流微电网应用，双向逆变器必须完成并网和具有功率因数校正的整流功能，以将直流母线调节到一定的电压范围。在逆变器操作中，电感电流在一个线路周期内可以从 0 变化到 32 A。这将导致较大的电感变化，大约是采用钼坡莫合金磁粉芯构造的电感器的七倍，从而导致高电流纹波和波动。本文在设计控制器和选择关键部件时考虑了这种变化，以确保逆变器正常运行。此外，为了采用具有成本效益的逆变器微控制器，本文研究并提出了控制对各种参数的敏感性。 5kW单相样机的实验结果验证了所设计逆变器的可行性。
This paper presents design and implementation of a 5-kW single-phase bidirectional inverter with wide inductance variation. For dc-microgrid applications, the bidirectional inverter has to fulfill grid connection and rectification with power factor correction to regulate the dc bus to a certain range of voltages. In the inverter operation, inductor current can vary from 0 to 32 A in one line cycle. This will result in wide inductance variation, around seven times for an inductor constructed with a molybdenum permalloy powder core, and thus, high current ripple and fluctuation. In this paper, we take into account this variation while designing controller and selecting key components to ensure inverter normal operation. Additionally, to adopt a cost-effective microcontroller for the inverter, the sensitivities of the control to various parameters are investigated and presented in this paper. Experimental results measured from a 5-kW single-phase prototype have verified the feasibility of the designed inverter.