STATIC REACTIVE POWER COMPENSATION DEVICE AND OPERATION METHOD THEREFOR

• Main Author: NAM TAE-SIK
• Format: Patent
• Language: English; Japanese
• Published: 16.03.2017
• Subjects: CONTROLLING; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

PROBLEM TO BE SOLVED: To provide a static reactive power compensation device which generates an initial ignition pulse in the case of changing a connection structure to a Y connection system.SOLUTION: A static reactive power compensation device according to an embodiment of the present invention comprises: a plurality of capacitors connected in a Y connection structure, for supplying power with three-phase current by being opened and closed; a plurality of bidirectional thyristors connected to the plurality of capacitors in series, for opening and closing the plurality of capacitors; and a control unit for, when power is applied to the static reactive power compensation device, applying an ignition pulse signal to the plurality of bidirectional thyristors reaching a voltage phase in which transient current becomes minimum periodically at a predetermined phase difference and at the time of applying an ignition pulse signal to one of the bidirectional thyristors first, applying the ignition pulse signal to one of the bidirectional thyristors and the other bidirectional thyristors allowing current to be conducted to three phases simultaneously.SELECTED DRAWING: Figure 2 【課題】接続構造をＹ結線方式に変更する場合において初期の点弧パルスを生成する静止型無効電力補償装置を提供する。【解決手段】本発明の一実施例による静止型無効電力補償装置は、Ｙ結線構造で接続され、開閉されることにより三相交流による電力を供給する複数のキャパシタと、複数のキャパシタに直列に接続され、複数のキャパシタを開閉させる複数の双方向サイリスタと、静止型無効電力補償装置に電源が印加されると、所定の位相差を置いて周期的に過渡電流が最小となる電圧位相に到達する複数の双方向サイリスタに点弧パルス信号を印加し、かつ最初にいずれか一つの双方向サイリスタに点弧パルス信号を印加する時点においては、いずれか一つの双方向サイリスタ及び三相に電流が導通できるようにする残りの双方向サイリスタに同時に点弧パルス信号を印加する制御部と、を含む。【選択図】図２