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Analysis and implement of the single-phase voltage-controlled grid-connected inverter

机译：单相压控并网逆变器的分析与实现

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摘要

This study describes the design and implementation of an inverter control algorithm with both the inverter inner controllable impedance and governor-free characteristics. The inverter controlled as a voltage supply works with open-loop power control in grid-connected operation. It is realised that a pulse-width modulation inverter mimics the primary frequency and voltage modulation characterised similarly to a synchronous generator. On the basis of the proposed control algorithm, the inner controllable impedance and governor-free characteristics are analysed mathematically. Simultaneously, the authors analyse the output power characteristics of the proposed inverter and the level of the decoupled power control for designing the inner controllable impedance. When the inverter connects with the stiff grid, it will appear as the output current deviation problem. The generation mechanism of the dc component from the proposed inverter is clearly identified. The current deviation compensation control is analysed and implemented to solve it. Simulations and experimental results are given to verify the idea.
机译：本研究描述了具有逆变器内部可控阻抗和无调速器特性的逆变器控制算法的设计和实现。作为电压源控制的逆变器在并网运行中与开环功率控制一起工作。已经认识到，脉宽调制逆变器模仿与同步发电机类似的特征的一次频率和电压调制。在提出的控制算法的基础上，对内部可控阻抗和无调速器特性进行了数学分析。同时，作者分析了所提出的逆变器的输出功率特性和去耦功率控制的水平，以设计内部可控阻抗。当逆变器与刚性电网连接时，将出现输出电流偏差问题。清楚地确定了所提出的逆变器的直流分量的产生机理。分析并实现了电流偏差补偿控制。通过仿真和实验结果验证了该思想。

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