全球能源互联网（英文）2021，Vol.4Issue(4)：425-433,9.DOI:10.14171/j.2096-5117.gei.2021.04.008
适用于间歇性新能源功率送出的高压直流输电系统灵活控制策略
Flexible control strategy for HVDC transmission system adapted to intermittent new energy delivery
摘要
Abstract
Intermittent new energy delivery requires increasing the flexibility of ultra-high voltage direct current (DC) power adjustment. Based on a converter steady-state model and a DC power model, the control angle constraints of a converter valve are relaxed for power regulation. In this paper, a flexible DC power control method based on a fixed tap changer position is proposed. The initial ratio of the converter transformer is optimized. The effects of the fixed-tap changer position control on the control angle, reactive power compensation, and commutation failure are analyzed. The new control method allows a DC system to operate at a large angle and increase the additional reactive power loss while improving the commutation security margin. Steady-state and electromagnetic transient simulations in the CIGRE test system verify the validity of the method proposed in this paper and the correctness of the analysis conclusions.关键词
分接开关/直流功率/触发角/无功补偿/关断角/换相失败Key words
Tap changer/DC power/Firing angle/Reactive power compensation/Extinction angle/Commutation failure引用本文复制引用
李晨昊,李宽,麻常辉,张鹏飞,陶琪,孙英涛,王昕..适用于间歇性新能源功率送出的高压直流输电系统灵活控制策略[J].全球能源互联网（英文）,2021,4(4):425-433,9.基金项目
This study was supported by an independent research project from the Shandong Electric Power Research Institute,"Research on the control method of DC power under fixed converter transformer tap-changer position"(ZY-2020-01).Based on the achievement,a national invention patent(No.2020112240143)has been applied. （ZY-2020-01）
