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。
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.
作者
伍弘
吴旭涛
王文昭
牛勃
沙伟燕
熊庆
汲胜昌
吴志勇
WU Hong;WU Xutao;WANG Wenzhao;NIU Bo;SHA Weiyan;XIONG Qing;JI Shengchang;WU Zhiyong(Electric Power Research Institute,State Grid Ningxia Electrical Power Co.,Ltd.,Yinchuan Ningxia 750011,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi′an Jiaotong University,Xi′an Shaanxi 710049,China;Wuzhong Power Supply Company,State Grid Ningxia Electric Power Co.,Ltd.,Wuzhong Ningxia 751100,China)
出处
《宁夏电力》
2024年第1期36-41,47,共7页
Ningxia Electric Power
基金
国网宁夏电力有限公司科技项目(5229DK23000F)。
关键词
气体绝缘开关设备
振动特性
谐波
新型电力系统
gas-insulated switchgear(GIS)
vibration characteristics
harmonics
new power system
