摘要
为了提高特高压交流试验示范工程的输送容量,提高系统的稳定性,对示范工程特高压变电站进行扩建以布置安装特高压串补装置。由于特高压串补装置体积庞大,其布置对扩建工程的占地面积和投资有重要影响。特高压串补装置布置设计的关键数据是相间放电特性,但以往很少进行如此大结构的电极放电特性试验,串补装置相间距离确定缺乏数据,为此对特高压串补装置相间空气间隙在不同波前时间操作冲击电压、不同电压分配系数及试品的不同布置高度等条件下进行了放电特性的研究。研究结果表明:随着相间距离的增大,长波前操作冲击下50%放电电压与标准操作冲击下的50%放电电压之比在逐渐变小;1 000/5 000μs长波前操作冲击电压下相间50%放电电压与电压分配系数呈线性关系;相间放电电压会受试品布置高度和电极型式影响。研究结果对特高压串补装置的布置优化有指导意义。
In order to improve the transmission capacity of project and the stability of system, UHV AC test demonstra- tion project expands the UHV substation and installs UHVAC series compensation device. The volume of UHV series compensation platform is so large that its layout is important to the area and investment of the expansion project. The key data to the layout design of the UHVAC series compensation platform are the phase-to-phase air gap discharge characte- ristics. However, due to the large volume of UHVAC series compensation platform, the determination of the phase-to- phase distance of series compensation platform is lack of appropriate test data. Consequently, we studied the discharge characteristics of the UHVAC series compensation platform phase-to-phase air gap at different front-time switching im- pulse voltage, different coefficient of voltage distribution, and different height of test object arrangement. The test results show that, as the distance of phase-to-phase air gap increases, the ratio of 50% discharge voltage under long front time impulse voltage to that under long standard switching impulse voltage becomes smaller, the 50% phase-to-phase dis- charge voltage under 1 000/5 000 ~ts long front-time switching impulse voltage has a linear relationship with the voltage distribution coefficient, and the 50% discharge voltage is affected .by the height of arrangement and the structure of the discharge electrode. The study is of an important significance to the UHV series compensation device layout optimization.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第2期551-556,共6页
High Voltage Engineering
基金
国家高技术研究发展计划(863计划)(2014AA051804)
国家电网公司重大科技项目(EPRIGYKJ(2014)2086)~~
关键词
特高压
串补装置
相间放电特性
长波前操作冲击电压
电压分配系数
布置高度
UHV
series compensation
phase-to-phase discharge characteristics
long front-time switching impulse voltage
voltage distribution coefficient
height of arrangement
