대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2015년도 제46회 하계학술대회
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- Pages.996-997
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- 2015
불평형 전압 조건에 강인한 모듈형 멀티레벨 컨버터의 순환전류 억제기법
Robust Circulating Current Control in MMC Under the Unbalanced Voltage Condition
- Moon, Ji-Woo (Korea Electrotechnology Research Institute) ;
- Park, Jung-Woo (Korea Electrotechnology Research Institute) ;
- Kang, Dae-Wook (Korea Electrotechnology Research Institute) ;
- Kim, Jang-Mok (Pusan National University)
- 발행 : 2015.07.15
초록
This paper proposes parameter design principle of the sub-module capacitance, Arm inductance and a control method to reduced the circulating currents in modular multilevel converter(MMC) under unbalanced voltage conditions. Under balanced voltage conditions, only negative-sequence circulating currents exist. Consequently, the conventional method has considered only negative-sequence circulating currents in MMC. However, under unbalanced voltage conditions, there are positive-sequence, zero-sequence and negative-sequence circulating currents in MMC. Thus, under unbalanced voltage conditions, a control method should consider these all components. This study proposes the control method to reduced the circulating currents under the unbalanced voltage.
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