新型柔性直流输电技术在风电并网中的应用

Application of New Flexible Direct Current Transmission Technology in Wind Power Grid Connection

随着全球可再生能源发电装机容量不断扩大,大规模风电场远离负荷中心布局的趋势愈发明显。传统交流输电和直流输电技术在远距离、大容量风电并网过程中面临着电网稳定性、输电损耗、投资成本等诸多挑战。新型柔性直流输电技术凭借其独特优势,为解决这些难题提供了有力途径。重点分析大规模风电并网所面临的技术难题和传统输电技术的局限性,概述柔性直流输电技术的运行原理、技术特点及发展现状,并探讨柔性直流在风电场集控、无功补偿、黑启动等方面的应用前景。最后,指出新型柔性直流输电技术将是促进风电高效并网的重要技术支撑。

With the increasing installed capacity of renewable energy in the world,the trend of large-scale wind farms away from the load center layout is becoming more and more obvious.Traditional alternating current and direct current transmission technologies are facing many challenges such as grid stability,transmission loss,investment cost and so on in the process of long-distance and large-capacity wind power grid connection.With its unique advantages,the new flexible direct current transmission technology provides a powerful way to solve these problems.This paper focuses on the technical problems faced by large-scale wind power grid connection and the limitations of traditional transmission technology,summarizes the operation principle,technical characteristics and development status of flexible direct current transmission technology,and discusses the application prospect of flexible direct current in centralized control,reactive power compensation and black start of wind farms.Finally,it is pointed out that the new flexible direct current transmission technology will be an important technical support to promote the efficient grid connection of wind power.