Fig. 12 shows the simplified equivalent circuit of a grid-connected GFM inverter, modelled using two voltage sources and an equivalent impedance Z e q. Initially, the system is
We quantify the saturation level of a converter by introducing the concept of degree of saturation (DoS), and we propose a provably stable current-limiting control with saturation
The use of the saturation-informed control strategy in multi-converter grid-connected systems or multi-converter islanded microgrids, during current saturation, leads to an
An adaptive-saturation module is proposed to enhance the transient stability of grid-following inverters after voltage-dip inception or voltage-dip fault clearance moment. The
Index Terms—Controller saturation, constant-amplitude oscillation, describing function, grid-connected inverter, stability.
This article analyzes the influence of the saturation limiter used with dc-link voltage control (DVC) on the transient stability of grid-forming (GFM) inverters and proposes a flexible
In this paper, we investigate the transient stability of a state-of-the-art grid-forming complex-droop control (i.e., dispatchable virtual oscillator control, dVOC) under current
Due to the disparity of power modules, asymmetry of driving pulses and measurement errors of sensors, dc currents may be injected to grid-connected photovoltaic
I. INTRODUCTION Transformer less grid connected inverters are widely used because of their high efficiency, small size and mass. However, the dc current offset
IN a grid connected inverter, if DC bus is utilized close to 100%, duty cycle saturation issue may cause distortion on the grid side. Also the control loop will be deteriorated
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