特高压直流输电工程换流变压器抽头级数确定方法

Calculation of Tap Series of Converter Transformer for UHVDC Transmission Project

换流变压器参数是直流输电工程设计的重要部分,为换流站的接线及布置方案论证提供支持,其合理性关系整个直流输电系统的运行特性和技术经济指标。以呼盟—山东±800 k V直流输电工程为例,根据其对系统条件、主回路参数以及运行特性等的要求,应用新公式对换流变压器抽头级数的计算过程进行了详细论述,所提计算方法为首次应用,并通过与实际取值比较验证了所提方法的合理性。

The parameters of converter transformer are an important part of the design of HVDC project, which provides the support for the main connection and layout of converter substation, and its rationality will influence the operating characteristics and technological economical index of whole HVDC system. Taking Humeng - Shandong ± 800 kV HVDC project for example, according to the requirements to system condition, main circuit parameters and operating characteristics, the calculation process of tap series of converter transformer is discussed in detail based on self - compiled program. The proposed calculation method is applied to HVDC project for the first time, and the rationality of the proposed method is verified by the comparison with the actual values.