特高压直流输电系统大角度控制策略研究
Research on Large Angle Control Strategy for Ultrahigh Voltage Direct Current Transmission System
吴布托 1董秋军 1邹昊凯 1殷丕盛1
作者信息
- 1. 国网山东省电力公司超高压公司,山东 济南 250000
- 折叠
摘要
当分层接入换流站直流输送功率调整和网侧电压波动时,受常规控制方法的制约,受端换流站换流变压器分接开关频繁过极性,导致乙炔体积分数缓慢增加.为减少换流变压器分接开关过极性的次数,提出一种大角度控制策略.该控制策略优先调整换流阀熄弧角的稳态范围,使换流变压器分接开关档位长时间保持稳定.仿真试验证明,直流输送功率大范围调整和网侧电压波动时,大角度控制策略能够显著降低分接开关过极性次数,提升了换流变压器运行的可靠性.
Abstract
When the direct current transmission power of the hierarchical access converter station is adjusted and the grid-side voltage fluctuates,affected by the constraints of conventional control methods,the tap changer of the converter transformer in the converter station at the receiving end suffers frequent over polarity,which leads to a slow increase of acetylene volume fraction.A large angle control strategy is proposed to reduce the frequency of over polarity of the converter transformer tap changer.The con-trol strategy prioritizes the adjustment of the steady state range of the converter valve extinction angle,which enables the converter transformer tap changer to operate at a stable position for a long time.The simulation tests prove that when the direct current trans-mission power is adjusted over a wide range and the grid-side voltage fluctuates,the large angle control strategy is able to signifi-cantly reduce the frequency of tap changer over polarity and improve the operation reliability of the converter transformer.
关键词
大角度控制策略/特高压直流输电/换流变压器/分接开关Key words
large angle control strategy/ultrahigh voltage direct current transmission/converter transformer/tap changer引用本文复制引用
出版年
2024
NETL
NSTL
万方数据