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基于HVDC技术的系统黑启动方法

HVDC Technology for Power System Restoration

  • 摘要: 当今电力系统中高压直流技术已得到了广泛的应用。高压直流系统具有与交流输电系统不同的功能和特性,目前电力系统呈现出交直流混联的特点。文章研究了基于高压直流技术特征的黑启动策略,首先简单回顾了不同高压直流系统的结构及控制策略,并基于两种目前最广泛应用的高压直流技术,即电流源型高压直流以及电压源型高压直流技术,对高压直流系统的黑启动能力及顺序进行了研究。另外,对采用结合STATCOM的LCC-HVDC以及VSC-HVDC技术联网的风电场,文章通过PSCAD/EMTDC对其黑启动过程进行了仿真并比较验证了两种技术的动态性能。

     

    Abstract: HVDC is widely used in power systems today. Different from AC transmission systems, HVDC systems have their special capabilities and characteristics. As more HVDC systems are integrated into power systems, startup strategies based on HVDC systems have to be carefully evaluated. In this paper, two kinds of most widely used HVDC technologies, i. e., LCC-HVDC and VSC-HVDC, are introduced. After a brief introduction of structures and control strategies of different HVaDC systems, the black-start capability and black-start sequence are discussed. Moreover, the black-start process of wind farms using LCC-HVDC with STATCOM, as well as VSC-HVDC, is simulated with PSCAD/EMTDC to demonstrate the dynamic performances of the two technologies.

     

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