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    CONTROLLING A LOAD COMMUTATED CONVERTER DURING UNDERVOLTAGE
    1.
    发明公开
    CONTROLLING A LOAD COMMUTATED CONVERTER DURING UNDERVOLTAGE 审中-公开
    在欠压条件下控制负载交换转换器

    公开(公告)号：EP3231077A1

    公开(公告)日：2017-10-18

    申请号：EP15801732.7

    申请日：2015-11-23

    Applicant: ABB Schweiz AG

    Inventor： BESSELMANN, Thomas ,  ALMER, Stefan ,  WIIK, Jan ,  VAN DE MOORTEL, Sture

    IPC: H02M5/45 ,  H02H7/12 ,  H02M1/32

    Abstract: A load commutated converter interconnects an AC power grid with an AC load and comprises a grid-side converter, a DC link and a load-side converter. A method for controlling the load commutated converter comprises: determining a gridside firing angle for the grid-side converter; determining a load-side firing angle for the load-side converter; determining a grid voltage of the AC power grid; modifying the grid-side firing angle and/or the load-side firing angle based on the grid voltage, such that when an undervoltage condition in the AC power grid occurs, the operation of the load commutated converter is adapted to a change in the grid voltage; and applying the grid-side firing angle to the grid-side converter and the load-side firing angle to the load-side converter.

    Abstract translation: 负载换向转换器（10）将交流电网（18）与交流负载（20）互连并且包括电网侧转换器（12），直流链路（14）和负载侧转换器（16）。 一种用于控制负载换向转换器（10）的方法包括：确定网侧变流器（12）的网侧触发角（或）; 确定所述负载侧转换器（16）的负载侧触发角（β）; 确定AC电网（18）的电网电压（U L）; 基于电网电压（UL）修改电网侧触发角（或）和/或负载侧触发角（β），使得当AC电网（18）中出现欠压状况时， 负载换相转换器（10）适应于电网电压（UL）的变化; 并且将电网侧触发角（或）施加到电网侧转换器（12）并且将负载侧触发角（β）施加到负载侧转换器（16）。

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