Power Swing Damping Control by HVDC Power Modulation in AC/DC Hybrid Transmission System

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  • 交直並行送電系統における直流パワーモジュレーションによる電力動揺抑制制御
  • コウチョク ヘイコウ ソウデン ケイトウ ニ オケル チョクリュウ パワー モ

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This paper describes a power swing damping control by HVDC power modulation. In a hybrid system (AC transmission system and HVDC system compose a loop transmission system.), a damping control of power swing by control of HVDC power is called power modulation control. The new inter-connection by HVDC link between Shikoku and Kansai power systems composes a loop transmission system by the existing ac transmission system and the new HVDC transmission system, therefore, a power modulation control can be applicable for stabilization of ac system. In this paper, a new developed power modulation control system to damp two power swing modes occurred in 60Hz inter-connected system and the neighbor power system to the HVDC converter station. Characteristics of power swing in ac system, the principle of power swing damping control by power modulation, design method of control system and results of verification tests by digital and analog simulator are described. It is shown that the developed power modulation system applied to the HVDC link is effective for damping two power swing modes.

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