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H-bridge cascaded static synchronous compensator (STATCOM) is often used to compensate the harmonic and reactive current derived from non-linear load. However, with the special topology structure, the voltage balancing of DC capacitors of H-bridge cascaded STATCOM is a key problem. Many papers adjust active voltage to solve this problem with the conventional PI controller which needs to regulate the...
This paper proposes a control strategy for megawatt-level direct-drive wind energy conversion systems based on permanent magnet synchronous generators (PMSG). In the paper, a peak current model of zero-sequence current is derived and analyzed. The parallel-operation controllers are designed to restrain reactive power circulation and beat-frequency zero-sequence currents caused by discontinuous space-vector...
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