新能源暂态电压支撑对某特高压直流输送能力的影响分析  

Analysis of the impact of transient voltage support from renewable energy sources on the UHVDC transmission capacity

作　　者：田志浩 彭湘星 刘刚 李桐 蒙飞 高峰 TIAN Zhihao;PENG Xiangxing;LIU Gang;LI Tong;MENG Fei;GAO Feng(State Grid Ningxia Electric Power Company Co.,Ltd.,Yinchuan Ningxia 750001,China;School of Electronic Information and Electrical Engineering,North Minzu University,Yinchuan Ningxia 750021,China)

机构地区：[1]国网宁夏电力有限公司,宁夏银川750001 [2]北方民族大学电气信息工程学院,宁夏银川750021

出　　处：《宁夏电力》2024年第6期1-5,共5页Ningxia Electric Power

基　　金：国网宁夏电力有限公司科技项目(B329NX23000L)。

摘　　要：针对某特高压直流输电工程中新能源占比高,电力系统支撑能力减弱问题,首先,介绍了新能源大量接入电网带来的挑战;其次,分析了直流故障对送端交流系统的影响以及主动支撑策略;最后,仿真分析主动支撑策略对直流闭锁和换相失败后造成送端近区新能源暂态过电压的抑制效果。结果表明新能源的主动支撑策略有助于抑制暂态电压波动,从而提升直流输电系统的稳定性。The high proportion of renewable energy sources has caused the weakened power system support capacity in the UHVDC(ultra-high voltage direct current)transmission project.In response to this issue,this paper first introduces the challenges posed by the massive integration of renewable energy into the grid.It further analyzes the impacts of DC faults on the AC transmission system at the sending end and the role of active support strategies.Finally,simulation analysis is conducted to evaluate the effectiveness of these active support strategies in mitigating transient overvoltage in renewable energy sources near the sending end,caused by DC blocking and commutation failures.The results indicate that the active support strategies provided by renewable energy sources are effective in suppressing transient voltage fluctuations,thereby enhancing the stability of the DC transmission system.

关 键 词：某特高压直流 主动支撑 暂态电压 

分 类 号：TM721.1[电气工程—电力系统及自动化]