海上平台柔性直流技术直流控制保护配置研究

  目的]  海上平台电源多以分布式的形式进行电力组网，该种组网方式成本高、经济效应差。柔性直流输电技术不需要交流电网提供换相电流，使得柔性直流输电具有对有功功率和无功功率进行同时控制的能力，并且不需要配置大量补偿设备，较好地解决了海上平台输电问题。  方法]  基于柔性直流输电技术的特点及接线型式，研究了直流控制的配置，分析了常见的直流故障特性，并展开了直流保护配置的研究。  结果]  给出了直流控制系统的配置原则及方案，以及直流保护的配置原则及方案。  结论]  研究成果为该技术在相关工程的应用推广提供了参考。

Research on the DC Control and Protection Configuration of VSC-HVDC Technology for Offshore Platform

  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.