EPE Association: EPE 2022 - LS5b: Converter Design and Optimisation

EPE 2022 - LS5b: Converter Design and Optimisation
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 02: Power Converter Topologies and Design > EPE 2022 - LS5b: Converter Design and Optimisation

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   A Sectorized FCS-MPC Transformerless SST For Power Transmission Application
By Lucas Frizera ENCARNAÇÃO [View]
[Download]

Abstract: This work proposes a sectorized optimization with Graph Theory applied in cascaded multilevel transformerless SST. The sectorized optimization can reduce the FCS-MPC combinational explosion due to the multiple cascaded H-bridges cells, while the proposed control is capable to avoid the prohibitive states maintaining the converter controllability and power quality.

   Intra-arm Balancing Control of Cascaded Multi-Port Converter for Whole Power Unbalance Conditions
By Takumi YASUDA [View]
[Download]

Abstract: This paper proposes a capacitor voltage balancing control for load imbalance among cells in a cascaded multi-port converter. The input/output power of the cell is controlled by adjusting the ac-side voltage of the cell to balance the capacitor voltage even when the load imbalance occurs in the arm. The current of the multi-port converter with the conventional controller can distort due to overmodulation of the cell under the large load imbalance. The proposed controller prevents overmodulation with the improved generation method of the ac-side voltage, which extends the operation region with respect to the power imbalance. Furthermore, the proposed controller injects minimal additional circulating current to achieve the operation for whole power conditions. The experimental results reveal that the proposed controller improves the total harmonic distortion of the grid current by 2.9p.t. with minimal circulating current while achieving the capacitor voltage balancing.

   Novel modulation method for common-mode noise reduction in Solid-State Transformer based on ISOP configuration
By Naoto KIKUCHI [View]
[Download]

Abstract: This paper proposes a modulation method for the reduction of the common-mode noise in Solid-State Transformer (SST) with the ISOP connection. Modular multilevel configurations based on theISOP connection increase the common-mode noise path because of increasing the switchingcomponents. Moreover, the cancellation of the common-mode noise using active common-modecanceler is not able to be applied because of complex common-mode noise path in SST with the ISOP connection. In the proposed method, one of the cells is driven by PWM in order to compensate for the harmonic component. The other cells are driven by square-wave operation in order to share the load. Therefore, the common-mode voltage is suppressed by the switching state of PFC. The advantage of the proposed method is that the additional EMC filter is not necessary for the reduction of the common-mode noise. The operation waveform with the proposed method is shown in the experimental results. The conducted emission is reduced by 11 dB and 7 dB in 200 kHz-band and 1 MHz-band, respectively.

EPE 2022 - LS5b: Converter Design and Optimisation
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 02: Power Converter Topologies and Design > EPE 2022 - LS5b: Converter Design and Optimisation
	[return to parent folder]

	A Sectorized FCS-MPC Transformerless SST For Power Transmission Application By Lucas Frizera ENCARNAÇÃO	[View] [Download]
Abstract: This work proposes a sectorized optimization with Graph Theory applied in cascaded multilevel transformerless SST. The sectorized optimization can reduce the FCS-MPC combinational explosion due to the multiple cascaded H-bridges cells, while the proposed control is capable to avoid the prohibitive states maintaining the converter controllability and power quality.

	Intra-arm Balancing Control of Cascaded Multi-Port Converter for Whole Power Unbalance Conditions By Takumi YASUDA	[View] [Download]
Abstract: This paper proposes a capacitor voltage balancing control for load imbalance among cells in a cascaded multi-port converter. The input/output power of the cell is controlled by adjusting the ac-side voltage of the cell to balance the capacitor voltage even when the load imbalance occurs in the arm. The current of the multi-port converter with the conventional controller can distort due to overmodulation of the cell under the large load imbalance. The proposed controller prevents overmodulation with the improved generation method of the ac-side voltage, which extends the operation region with respect to the power imbalance. Furthermore, the proposed controller injects minimal additional circulating current to achieve the operation for whole power conditions. The experimental results reveal that the proposed controller improves the total harmonic distortion of the grid current by 2.9p.t. with minimal circulating current while achieving the capacitor voltage balancing.

	Novel modulation method for common-mode noise reduction in Solid-State Transformer based on ISOP configuration By Naoto KIKUCHI	[View] [Download]
Abstract: This paper proposes a modulation method for the reduction of the common-mode noise in Solid-State Transformer (SST) with the ISOP connection. Modular multilevel configurations based on theISOP connection increase the common-mode noise path because of increasing the switchingcomponents. Moreover, the cancellation of the common-mode noise using active common-modecanceler is not able to be applied because of complex common-mode noise path in SST with the ISOP connection. In the proposed method, one of the cells is driven by PWM in order to compensate for the harmonic component. The other cells are driven by square-wave operation in order to share the load. Therefore, the common-mode voltage is suppressed by the switching state of PFC. The advantage of the proposed method is that the additional EMC filter is not necessary for the reduction of the common-mode noise. The operation waveform with the proposed method is shown in the experimental results. The conducted emission is reduced by 11 dB and 7 dB in 200 kHz-band and 1 MHz-band, respectively.