复杂高次谐波电流作用下GIS振动特性研究
Research on the vibration characteristics of GIS with the effect of complex high-order harmonics
伍弘 1吴旭涛 1王文昭 2牛勃 1沙伟燕 1熊庆 2汲胜昌 2吴志勇3
作者信息
- 1. 国网宁夏电力有限公司电力科学研究院,宁夏 银川 750011
- 2. 西安交通大学电工材料电气绝缘全国重点实验室,陕西 西安 710049
- 3. 国网宁夏电力有限公司吴忠供电公司,宁夏 吴忠 751100
- 折叠
摘要
新型电力系统源-网-荷侧特性不同于传统电力系统,系统中存在谐波,甚至超高次谐波.谐波对气体绝缘开关设备(gas insulated switchgear,GIS)振动特性产生影响.首先,分析了新型电力系统源侧、网侧以及负荷侧并入电网时产生的谐波种类及成分;其次,搭建GIS谐波激励下振动特性测量平台,结合电力系统中的谐波特性,对不同谐波电流激励下的GIS 振动特征进行试验研究;最后,通过试验发现:GIS外壳振动幅值在轴向呈线性分布,振动大小与端部刚度成反比;当存在多种谐波电流时,谐波之间的和频、差频及倍频使振动频率更加丰富,这使得GIS更容易产生机械谐振.
Abstract
The new power system,characterized by distinct source-grid-load properties compared to traditional power systems,includes harmonics and even ultra-high harmonics.These harmonics can affect the vibration characteristics of the gas-insulated switchgear(GIS).This study begins with an analysis of the types and components of the harmonics generated by the source,grid,and load sides when integrated into the new power system.Then,a test platform for mea-suring the vibration characteristics of GIS under harmonic excitation is built.The study then investigates experimental research on the vibration characteristics of GIS under different harmonic current excitations,considering the specific harmonic characteristics present in power systems.The results indicate that the vibration amplitude of the GIS bus shell displays a linear distribution along the axial direction,with the vibration magnitude being inversely proportional to the end stiffness at the ends.When multiple harmonic currents are present,the interaction of harmonics-through their sum,difference,and doubling frequencies,enriches the vibration frequency spectrum,making it easier for GIS to produce mechanical resonance.
关键词
气体绝缘开关设备/振动特性/谐波/新型电力系统Key words
gas-insulated switchgear(GIS)/vibration characteristics/harmonics/new power system引用本文复制引用
基金项目
国家电网宁夏电力有限公司科技项目(5229DK23000F)
出版年
2024
国家科技期刊平台
NSTL
万方数据