| 摘要 |
The invention relates to a converter (10) for symmetrical reactive power compensation, comprising phase legs (1, 2, 3) whose associated phases of a three-phase AC voltage network can be connected and are interconnected in an insulated star connection, the first phase leg being devoid of submodules and the second and third phase legs each comprising a phase module (7, 9) having bipolar submodules (8) connected in series. Said converter (10) also comprises a control device (19) for controlling phase module currents, where voltages to be set at each phase module can be determined by said control device, and the control device comprises a decoupling unit configured to calculate correction voltages for each phase module as a function of - a first connection voltage between the first and the second phase legs, - a second connection voltage between the second and the third phase legs and - a first and/or a second control voltage each derived from target currents and the phase module currents of said second or third phase legs, such that the voltages to be set can be derived from the control voltages and correction voltages. The invention also relates to a method for controlling such a converter. |
