DSTATCOM negative-sequence current cross coupling compensation control method

The invention discloses a DSTATCOM negative-sequence current cross coupling compensation control method. Conventional dq conversion software phase-locking closed-loop control complexity is avoided by the adoption of a digital phase-locking method with a sine and cosine trigonometric function as a two-dimensional orthogonal basis. In addition, the complexity of current negative-sequence current compensation control coordinate conversion control is overcome, a cross coupling negative-sequence current control strategy is provided, cross coupling is carried out on the negative-sequence current closed-loop controller output value in the counterclockwise rotation dq coordinate system to the positive-sequence reactive current or positive-sequence harmonic current current-voltage conversion result, and unified space vector control is carried out.