Stabilized Negative Resistance Emulating Control for Grid-Connected Inverter

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Abstract
Resistance emulating control is attractive due to the advantages of ease to use and less voltage sensor. However, it is only suitable for rectification mode. This letter presents a simple stabilized negative resistance emulating control for inverter mode, which overcomes the limitation of the conventional resistance emulating control. To stabilize the converter, a stabilizer based on negative inductance emulating is designed. Moreover, the unity power factor is realized by the steady-state inductance emulating technique. Since only the input current information is required, this control scheme is cost-effective and robust. Experimental results verify the effectiveness of the proposed method.
Funding Information
  • science and technology innovation Program of Hunan Province (2020RC4002)
  • National Natural Science Foundation of China (62125308, 61933011, 51807206)
  • Central South University (2019CX003)
  • Central South University (2021zzts0188)