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

作者：He, Chaojie; Zhao, Jinbin^*; Zhang, Shuaitao; Ushiki, Shuuichi

来源：IET Power Electronics, 2017, 10(11): 1344-1352.

DOI：10.1049/iet-pel.2016.0446

• PWM invertors
• voltage control
• power control
• power grids
• synchronous generators
• open loop systems
• single-phase voltage-controlled grid-connected inverter
• inverter inner controllable impedance characteristics
• inverter governor-free characteristics
• voltage supply
• open-loop power control
• grid-connected operation
• pulse-width modulation inverter
• primary frequency modulation
• primary voltage modulation
• synchronous generator
• output power characteristics analysis

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.

• 出版日期2017-9-9
• 单位上海电力大学