<p>This paper presents a control method converters for hybrid AC/DC microgrid in stand-alone mode, the converters will be controlled to operate bidirectionally, transmitting power back and forth between the two subgrids AC and DC. The control method will maintain the voltage and frequency stability of the microgrid within the allowable range, as well as the balance of active power and reactive power, where the difference of the DC-bus voltage and rated DC voltage of the proposed method is 1 Vol, and the difference between the frequency and the rated frequency is 0.1 Hz. In addition, the control method can improve the economy, improve the voltage and frequency recovery ability of the microgrid in case of increased load or power generation failure in the AC and DC subgrids, where the proposed method has a difference between the DC-bus voltage and rated DC voltage is of −2.5 Vol, and the difference of the frequency and rated frequency is −0.5 Hz. The control method also eliminates the circulating current and noise current generated when the output parameters of the power converters are inconsistent, where the reactive power division error of the proposed method is only from 0% to 0.22%. A simulation model for the AC/DC hybrid microgrid is built on MATLAB/Simulink and an experimental setup is built in the laboratory. The results obtained from the simulation and experimental setup verify the effectiveness of the proposed method.</p>

错误:搜索内容不能为空,请输入英文关键词
错误:关键词超出字数限制,请精简
高级检索

An Improved Controller for AC/DC Hybrid Microgrid Using Bidirectional Interlinking Converter

  • Xuan Hoa Thi Pham

摘要

This paper presents a control method converters for hybrid AC/DC microgrid in stand-alone mode, the converters will be controlled to operate bidirectionally, transmitting power back and forth between the two subgrids AC and DC. The control method will maintain the voltage and frequency stability of the microgrid within the allowable range, as well as the balance of active power and reactive power, where the difference of the DC-bus voltage and rated DC voltage of the proposed method is 1 Vol, and the difference between the frequency and the rated frequency is 0.1 Hz. In addition, the control method can improve the economy, improve the voltage and frequency recovery ability of the microgrid in case of increased load or power generation failure in the AC and DC subgrids, where the proposed method has a difference between the DC-bus voltage and rated DC voltage is of −2.5 Vol, and the difference of the frequency and rated frequency is −0.5 Hz. The control method also eliminates the circulating current and noise current generated when the output parameters of the power converters are inconsistent, where the reactive power division error of the proposed method is only from 0% to 0.22%. A simulation model for the AC/DC hybrid microgrid is built on MATLAB/Simulink and an experimental setup is built in the laboratory. The results obtained from the simulation and experimental setup verify the effectiveness of the proposed method.