A novel strategy is proposed for high-frequency oscillation in multi-inverter systems. The hardware in the loop experiment is designed for verification. In the context of the energy crisis and environmental pollution, microgrid technology has developed rapidly.
Abstract: Due to stronger nonlinear interaction and coupling effect, multi-input inverters can exhibit a variety of complex oscillations with multiple harmonics. This article develops a multiharmonic modal analysis method to uncover the occurrence reasons of various harmonics in the two-stage double-input Buck inverter.
On the basis of traditional dual-loop control, an impedance reconstruction control of the source PWM inverter is proposed, which can effectively suppress the high-frequency oscillation of the island power system. The following conclusions can be drawn from this paper:
Another approach to consider is the adoption of design rules to avoid the instability caused by the interaction between the inverters and the grid . Figure 20 categorizes the various damping approaches that have been employed to mitigate the harmonic resonance in multi–parallel inverter system. Figure 20.
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The virtual resistance–based method is able to suppress harmonic resonances in parallel inverter systems without deteriorating the filter dynamic in multiple frequency ranges, …
Customer ServiceThis paper evaluates the behaviour of high-frequency harmonics in the 2–20 kHz range due to the parallel operation of multiple solar PV inverters connected to a low-voltage …
Customer ServiceTo address this, this paper first uses the harmonic linearization method to establish sequence impedance models of the inverter and asynchronous motor. It analyses the high …
Customer ServiceBased on the harmonic instability causes obtained by the impedance model, a novel impedance reshaping high-frequency oscillation suppression strategy is proposed that …
Customer ServiceDue to stronger nonlinear interaction and coupling effect, multi-input inverters can exhibit a variety of complex oscillations with multiple harmonics. This article develops a …
Customer ServiceIn this study, multi-harmonic oscillation behaviour and stability problem in double-input buck/buck-boost inverter are investigated both theoretically and experimentally. First, the …
Customer ServiceThe virtual resistance–based method is able to suppress harmonic resonances in parallel inverter systems without deteriorating the filter dynamic in multiple frequency ranges, low and high frequency, unlike …
Customer ServiceThe harmonic and resonant characteristics of a multi-inverter grid-connected system can negatively affect power quality when weak grid conditions are present. In this …
Customer ServiceAn impedance reconstruction control for the source PWM inverter is proposed, which improves the phase of the output sequence impedance of the source PWM inverter at …
Customer ServiceIn this study, multi-harmonic oscillation behaviour and stability problem in double-input buck/buck–boost inverter are investigated both theoretically and experimentally. First, the observer-pattern model is …
Customer ServiceThe harmonic and resonant characteristics of a multi-inverter grid-connected system can negatively affect power quality when weak grid conditions are present. In this …
Customer ServiceIn this study, multi-harmonic oscillation behaviour and stability problem in double-input buck/buck–boost inverter are investigated both theoretically and experimentally. First, the …
Customer ServiceThis paper evaluates the behaviour of high-frequency harmonics in the 2–20 kHz range due to the parallel operation of multiple solar PV inverters connected to a low-voltage (LV) network.
Customer ServiceConsequently, this work presents a worldwide technique for suppressing high-frequency oscillations, using a mix of adaptive virtual impedance and PCC voltage feedforward …
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