±800 kV直流输电系统主回路参数研究

Study on Main Circuit Parameters for ±800 kV DC Transmission Project

摘要: 换流站主回路设备参数选择对直流输电系统的设计十分重要。本文以哈密–郑州±800 kV直流输电工程为例，对换流变压器短路阻抗、换流变压器分接开关级数、换流阀空载直流电压、平波电抗器电感值等关键参数进行了选择，并通过多种运行方式下的主回路稳态特性计算来校核主回路设备参数是否合理。

Abstract: The main circuit parameters of converter station equipments are very important for Ultra-High Voltage Direct Current (UHVDC) transmission system design. Taking ±800 kV DC project from Hami to Zhengzhou for example, the key parameters such as short-circuit impedance, OLTC steps of converter transformer, no-load direct-current voltage of converter valve, smoothing reactor inductance are selected. Finally, the parameters selected are checked out through calculations of main circuit steady-state in different operation modes.