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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...
This paper proposes a synchronization control strategy based on voltage-controlled inverter and the synchronous speed is controllable. The proposed inverter can be simplified as a circuit consists of a controlled voltage source and equivalent impedance, the output voltage amplitude and frequency can be changed by adjusting the axial-regulators. The designed synchronization method has detection module...
In traditional grid-connected inverter control strategies, the dual-loop current control system is widely used and quite effective. However, the grid impedance is mainly inductive with uncertainty in weak grid. Its value varies with wide range which the traditional control system performance will be effected seriously, even unstable. When a control system such as the grid-connected inverter system...
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