Introduction  The power grid is usually formed in the type of distribution. This type of grid has high cost and poor economic effect. The VSC-HVDC technology does not require alternating phase current in the AC power grid, and the VSC-HVDC has the ability to control both active and reactive power. Besides, there is no need to configure a large amount of compensation equipment. So it can solve the problems for offshore platform.

  Method  Based on the characteristics of VSC-HVDC technology and connection type, this article studied the DC control configuration, analyzed common DC fault characteristics and the DC protection configuration.

  Result  The configuration principle and scheme of DC control system, the configuration principle and scheme of DC protection is given.

  Conclusion  This work provides some guidance for the application of the technology in the related engineering.