Application of a Modular Multilevel Cascade Converter (MMCC-SDBC) to a STATCOM

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  • モジュラー・マルチレベル・カスケード変換器（MMCC-SDBC）のSTATCOMへの応用
  • モジュラー・マルチレベル・カスケード変換器(MMCC-SDBC)のSTATCOMへの応用 : 有効電力・逆相無効電力制御
  • モジュラー ・ マルチレベル ・ カスケード ヘンカンキ(MMCC-SDBC)ノ STATCOM エ ノ オウヨウ : ユウコウ デンリョク ・ ギャクソウ ムコウ デンリョク セイギョ
  • —有効電力・逆相無効電力制御—
  • —Control of Active Power and Negative-Sequence Reactive Power—

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This paper presents the application of a modular multilevel cascade converter based on single-delta bridge-cells (MMCC-SDBC) to a STATic synchronous COMpensator (STATCOM), particularly for negative-sequence reactive-power control. The SDBC is characterized by cascade connection of multiple single-phase H-bridge (or full-bridge) converter cells per leg, which facilitates flexible circuit design, low voltage steps, and low electro-magnetic interference (EMI) emissions. However, there is no published report on such a STATCOM with experimental verification or a control strategy. This paper designs, constructs, and tests a 100-V 5-kVA PWM STATCOM based on the SDBC with focus on the operating principle and performance. Experimental results confirm that this converter can control not only the positive-sequence reactive power but also the negative-sequence reactive power and low-frequency active power intended for the flicker compensation of arc furnaces.

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