首页|Reference-input-based Imaginary Axis Current Estimation Method for DQ Control Strategy in Single-phase PWM Converters

Reference-input-based Imaginary Axis Current Estimation Method for DQ Control Strategy in Single-phase PWM Converters

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For dq control strategies in single-phase pulse width modulation(PWM)converters,the β-axis current must be cre-ated by imaginary axis current estimation(IACE)methods.The estimated error of the β-axis current during the transient process causes d-q axis current loops to be incompletely decoupled,thereby affecting the dynamic performance of the current loop.The second-order generalized integrator(SOGI)method suffers from slow dynamic response.The fictive-axis emulation(FAE)method provides fast dynamic response but it is sensitive to circuit parameters.A reference-input(RI)-based IACE method is proposed to overcome the above shortcomings.According to the characteristic that the β-axis current loop has no transient process,the β-axis current is estimated by the d-q axis reference inputs.This is equivalent to introducing the β-axis reference input as a feedforward term into the d-q axis current loop,so the parameter sensitivity problem is solved,and the parameter tuning is not needed.The proposed method can maintain good steady-state performance and significantly improve the dynamic perfor-mance of the current loop.Furthermore,it is straightforward and can be easily implemented in digital controllers.Comprehensive hardware-in-the-loop(HIL)experimental comparisons with the SOGI and FAE methods have been conducted to verify the correctness and effectiveness of the proposed RI-based IACE method.

dq controldynamic responseimaginary axis current estimation(IACE)single-phase PWM converter

Lin Peng、Lei Ma、Wensheng Song、Haoran Liu

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School of Electrical Engineering,Sichuan Polytechnic University,Deyang 618000,China

School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHigh-Speed Railway Joint Funds of National Natural Science Foundation of China

6173301562473322U1934204

2024

10.17775/CSEEJPES.2020.04220

中国电机工程学会电力与能源系统学报(英文版)
中国电机工程学会

中国电机工程学会电力与能源系统学报(英文版)

CSTPCDEI
ISSN：2096-0042
年,卷(期)：2024.10(5)