摘要
针对特高压直流工程投运后电网特性的变化,分析了电力系统安全、经济运行面临的挑战及可采取的对策。首先在简要介绍直流系统故障的基础上,分别针对有功回退引起的暂态功角稳定问题与无功冗余造成的暂态过电压问题进行了理论分析,并根据陕西电网仿真计算结果进一步说明直流投运后对运行灵活性的制约。然后分析了运行灵活性下降对新能源消纳造成的影响,讨论了提高新能源消纳能力的对策。最后对所讨论问题进行归纳总结,并提出了未来工作与研究的展望。
In view of the changes of power network characteristics after the UHVDC project is put into operation,the challenges faced by power system security and economic operation and the countermeasures that can be taken are analyzed.Firstly,based on the brief introduction of DC system faults,the transient angle stability caused by active power back-off and the transient overvoltage caused by reactive power redundancy are analyzed theoretically.According to the simulation results of Shaanxi power grid,the constraints on the operation flexibility after the DC operation are further explained.Then the influence of the operating flexibility decline on new energy consumption is analyzed and the countermeasure to improve the new energy consumption capacity is discussed.Finally,the problems discussed are summarized,and the prospect of future work and research is put forward.
作者
郭晨
王碧阳
李立
倪鸣
张启文
GUO Chen;WANG Biyang;LI Li;NI Ming;ZHANG Qiwen(State Grid Shaanxi Electric Power Dispatch and Control Center,Xi’an 710000,China;Xi’an Jiaotong University,Xi’an 710049,China;Northwest Branch of State Grid Corporation of China,Xi’an 710048,China)
出处
《智慧电力》
北大核心
2021年第5期56-62,共7页
Smart Power
基金
国家重点研发计划资助项目(2018YFB0904800)。
关键词
交直流外送系统
新能源消纳
暂态功角稳定
暂态过电压
AC/DC sending-out system
new energy consumption
angle transient stability
transient overvoltage
