Under the influence of the unbalanced load, the negative and zero sequence components in the output voltage of the three-phase four-leg voltage source inverter (TPFL-VSI) will cause
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This paper proposes zero sequence third harmonic injection and zero sequence power balancing compensation methods to improve the DC bus voltage utilization and reduce the grid current distortion.
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This section generalizes the zero-sequence modeling and control concept to parallel N-number of M-phase current-bidirectional converters, such as full-bridge, three-phase three-leg and four-leg
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Therefore, this paper comparatively studies several neutral current control approaches and their impacts on grid voltage balance, which is required by grid code.
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This article proposes a novel and straightforward method for determining the injected zero-sequence voltage signal by comparing the three reference voltage signals for CBPWM in the
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The first objective function was based on the mathematical model of a three‐level T‐type, and the second was based on the zero‐sequence injection principle and intended to modify the
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The zero sequence impedance of the "inverter" is just the zero sequence impedance of the transformer and the power electronics are open circuited in the zero sequence (probably connected
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According to the principle of predictive control, the appropriate zero-sequence voltage is obtained by means of sub-regional optimization. Simulation and experimental results are then
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This article proposes a simple zero-sequence voltagei injection method for the carrier-based pulsewidth modulation (CBPWM) of the three-level neutral-point-clam
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Zero-sequence voltage injection methods based on carrier-based pulse width modulation (PWM) have been proven to be effective in controlling the NP potential. This paper proposes a simple algorithm of
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