Abstract
This research designs a hybrid modular multilevel converter using an asymmetrical full-bridge (AFB) submodule. In the proposed Hybrid-MMC system, the AFB aims to protect the converter from DC fault with minimal steady-state loss. The AFB submodule consists of 4 IGBTs, 4 diodes, and 2 capacitors. A central capacitor generates the submodule voltage and works during normal operation. The other capacitor, named a supplemental capacitor is normally switched off but switched in and thus generates a reverse voltage with the central capacitor when a DC fault occurs. The central capacitor should be sufficiently large for voltage balancing requirement but the supplemental capacitor does not have this requirement. When the DC fault is detected, all IGBTs are turned off and the AFB submodules generate the reverse voltage against the AC line to line peak voltage. Because the AFB submodules can generate higher reverse voltage than the existing full-bridge submodule, the Hybrid MMC with the AFB submodules blocks the DC fault faster. It can be designed to reduce the number of IGBT (switch) conducting and minimize the converter loss. This paper validates the performance of the proposed scheme with simulation and experiment studies.
| Original language | English |
|---|---|
| Publication status | Published - 2016 Jan 1 |
| Event | CIGRE Session 46 - Paris, France Duration: 2016 Aug 21 → 2016 Aug 26 |
Other
| Other | CIGRE Session 46 |
|---|---|
| Country | France |
| City | Paris |
| Period | 16/8/21 → 16/8/26 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
Cite this
}
Enabling DC fault blocking capability of hybrid modular multilevel converter HVDC using asymmetrical full-bridge submodule. / Kim, H.; Kang, J.; Kim, S.; Na, J.; Hur, K.; Lee, D.; Kwon, Y.
2016. Paper presented at CIGRE Session 46, Paris, France.Research output: Contribution to conference › Paper
TY - CONF
T1 - Enabling DC fault blocking capability of hybrid modular multilevel converter HVDC using asymmetrical full-bridge submodule
AU - Kim, H.
AU - Kang, J.
AU - Kim, S.
AU - Na, J.
AU - Hur, K.
AU - Lee, D.
AU - Kwon, Y.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - This research designs a hybrid modular multilevel converter using an asymmetrical full-bridge (AFB) submodule. In the proposed Hybrid-MMC system, the AFB aims to protect the converter from DC fault with minimal steady-state loss. The AFB submodule consists of 4 IGBTs, 4 diodes, and 2 capacitors. A central capacitor generates the submodule voltage and works during normal operation. The other capacitor, named a supplemental capacitor is normally switched off but switched in and thus generates a reverse voltage with the central capacitor when a DC fault occurs. The central capacitor should be sufficiently large for voltage balancing requirement but the supplemental capacitor does not have this requirement. When the DC fault is detected, all IGBTs are turned off and the AFB submodules generate the reverse voltage against the AC line to line peak voltage. Because the AFB submodules can generate higher reverse voltage than the existing full-bridge submodule, the Hybrid MMC with the AFB submodules blocks the DC fault faster. It can be designed to reduce the number of IGBT (switch) conducting and minimize the converter loss. This paper validates the performance of the proposed scheme with simulation and experiment studies.
AB - This research designs a hybrid modular multilevel converter using an asymmetrical full-bridge (AFB) submodule. In the proposed Hybrid-MMC system, the AFB aims to protect the converter from DC fault with minimal steady-state loss. The AFB submodule consists of 4 IGBTs, 4 diodes, and 2 capacitors. A central capacitor generates the submodule voltage and works during normal operation. The other capacitor, named a supplemental capacitor is normally switched off but switched in and thus generates a reverse voltage with the central capacitor when a DC fault occurs. The central capacitor should be sufficiently large for voltage balancing requirement but the supplemental capacitor does not have this requirement. When the DC fault is detected, all IGBTs are turned off and the AFB submodules generate the reverse voltage against the AC line to line peak voltage. Because the AFB submodules can generate higher reverse voltage than the existing full-bridge submodule, the Hybrid MMC with the AFB submodules blocks the DC fault faster. It can be designed to reduce the number of IGBT (switch) conducting and minimize the converter loss. This paper validates the performance of the proposed scheme with simulation and experiment studies.
UR - http://www.scopus.com/inward/record.url?scp=85048778059&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85048778059&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:85048778059
ER -