远距离大容量直流输送风电功率调节方式研究

北方风电大规模外送是未来中国风电发展的需要。提出了远距离大容量直流输送风电的功率调节新模式,分析了送端电网的电力盈余特性和调峰能力盈余特性,在此基础上研究了送端系统与直流系统互补运行的原理,并进行了具体算例分析。研究结果表明,在直流外送大量风电的情况下,通过发挥送端系统的调节能力,能够实现直流输电的多段式平稳运行及风电高效利用。最后,还提出保障该直流输电功率调节方式实施的相关措施。

Study on Power Regulation Scheme of Large-Capacity and Long-Distance DC Transmission for Wind Power

Transmission of large-scale wind power from the north of China fits the future need for the wind power development. A new power regulation scheme of large-capacity and long-distance DC transmission is proposed then for wind power . Based on the analysis of the characteristics of power surplus and regulating capacity surplus of the sending end system, the principle of complementary operation between the sending end system and the DC system is studied with a testing case established in details. The results show that, in the case of bulk wind power transmission, constant and steady DC transmission as well as efficient wind power utilization can be achieved, by giving play to the regulating capabilities of the sending end system. Finally, relevant measures are put forward to safeguard the implementation of such DC transmission regulations.