Three-Phase DC Capacitor-Less Solid-State Variable Capacitor

Yunting Liu; Leon M. Tolbert; Fred Wang; Fang Z. Peng

doi:10.1109/ECCE44975.2020.9235466

Three-Phase DC Capacitor-Less Solid-State Variable Capacitor

Yunting Liu, Leon M. Tolbert, Fred Wang, Fang Z. Peng

Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Grid-connected full bridge inverters typically have a bulky electrolytic dc capacitor to absorb the unbalanced power from the ac side. The electrolytic capacitors are vulnerable and normally have shorter lifetime than other components in the converter. In most full-bridge inverter applications, the dc voltage is required to be relatively constant. However, in reactive power compensation applications, such as solid-state variable capacitor (SSVC), the constant dc-bus voltage is unnecessary since the dc bus is floating. This paper proposes a three-phase dc capacitor-less SSVC, which removes the electrolytic dc capacitor from the circuit by releasing the constraints on dc bus voltage fluctuation. The dc voltage is supported by ac side voltage directly. The remaining dc capacitance has a value of only 3% compared to that of the conventional three-phase SSVC. The proposed three-phase dc capacitor-less SSVC is validated by simulation.

Original language	English (US)
Title of host publication	ECCE 2020 - IEEE Energy Conversion Congress and Exposition
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1945-1950
Number of pages	6
ISBN (Electronic)	9781728158266
DOIs	https://doi.org/10.1109/ECCE44975.2020.9235466
State	Published - Oct 11 2020
Event	12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States Duration: Oct 11 2020 → Oct 15 2020

Publication series

Name	ECCE 2020 - IEEE Energy Conversion Congress and Exposition

Conference

Conference	12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Country/Territory	United States
City	Virtual, Detroit
Period	10/11/20 → 10/15/20

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering
Mechanical Engineering
Control and Optimization
Energy Engineering and Power Technology

Access to Document

10.1109/ECCE44975.2020.9235466

Cite this

Liu, Y., Tolbert, L. M., Wang, F., & Peng, F. Z. (2020). Three-Phase DC Capacitor-Less Solid-State Variable Capacitor. In ECCE 2020 - IEEE Energy Conversion Congress and Exposition (pp. 1945-1950). Article 9235466 (ECCE 2020 - IEEE Energy Conversion Congress and Exposition). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE44975.2020.9235466

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abstract = "Grid-connected full bridge inverters typically have a bulky electrolytic dc capacitor to absorb the unbalanced power from the ac side. The electrolytic capacitors are vulnerable and normally have shorter lifetime than other components in the converter. In most full-bridge inverter applications, the dc voltage is required to be relatively constant. However, in reactive power compensation applications, such as solid-state variable capacitor (SSVC), the constant dc-bus voltage is unnecessary since the dc bus is floating. This paper proposes a three-phase dc capacitor-less SSVC, which removes the electrolytic dc capacitor from the circuit by releasing the constraints on dc bus voltage fluctuation. The dc voltage is supported by ac side voltage directly. The remaining dc capacitance has a value of only 3% compared to that of the conventional three-phase SSVC. The proposed three-phase dc capacitor-less SSVC is validated by simulation.",

author = "Yunting Liu and Tolbert, {Leon M.} and Fred Wang and Peng, {Fang Z.}",

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Liu, Y, Tolbert, LM, Wang, F & Peng, FZ 2020, Three-Phase DC Capacitor-Less Solid-State Variable Capacitor. in ECCE 2020 - IEEE Energy Conversion Congress and Exposition., 9235466, ECCE 2020 - IEEE Energy Conversion Congress and Exposition, Institute of Electrical and Electronics Engineers Inc., pp. 1945-1950, 12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020, Virtual, Detroit, United States, 10/11/20. https://doi.org/10.1109/ECCE44975.2020.9235466

Three-Phase DC Capacitor-Less Solid-State Variable Capacitor. / Liu, Yunting; Tolbert, Leon M.; Wang, Fred et al.
ECCE 2020 - IEEE Energy Conversion Congress and Exposition. Institute of Electrical and Electronics Engineers Inc., 2020. p. 1945-1950 9235466 (ECCE 2020 - IEEE Energy Conversion Congress and Exposition).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - Grid-connected full bridge inverters typically have a bulky electrolytic dc capacitor to absorb the unbalanced power from the ac side. The electrolytic capacitors are vulnerable and normally have shorter lifetime than other components in the converter. In most full-bridge inverter applications, the dc voltage is required to be relatively constant. However, in reactive power compensation applications, such as solid-state variable capacitor (SSVC), the constant dc-bus voltage is unnecessary since the dc bus is floating. This paper proposes a three-phase dc capacitor-less SSVC, which removes the electrolytic dc capacitor from the circuit by releasing the constraints on dc bus voltage fluctuation. The dc voltage is supported by ac side voltage directly. The remaining dc capacitance has a value of only 3% compared to that of the conventional three-phase SSVC. The proposed three-phase dc capacitor-less SSVC is validated by simulation.

AB - Grid-connected full bridge inverters typically have a bulky electrolytic dc capacitor to absorb the unbalanced power from the ac side. The electrolytic capacitors are vulnerable and normally have shorter lifetime than other components in the converter. In most full-bridge inverter applications, the dc voltage is required to be relatively constant. However, in reactive power compensation applications, such as solid-state variable capacitor (SSVC), the constant dc-bus voltage is unnecessary since the dc bus is floating. This paper proposes a three-phase dc capacitor-less SSVC, which removes the electrolytic dc capacitor from the circuit by releasing the constraints on dc bus voltage fluctuation. The dc voltage is supported by ac side voltage directly. The remaining dc capacitance has a value of only 3% compared to that of the conventional three-phase SSVC. The proposed three-phase dc capacitor-less SSVC is validated by simulation.

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Three-Phase DC Capacitor-Less Solid-State Variable Capacitor

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