海上平台柔性直流技术直流控制保护配置研究

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

[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。

[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.