1) DC flashover performance
直流污闪特性
1.
The DC flashover performance of 4 types of composite post insulator and 2 types of ceramic post insulator under different ESDD, NSDD, insulator material and shapes were studied.
为给特高压直流变电外绝缘设计提供试验依据,在实际海拔1970m条件下对4种复合支柱绝缘子和2种瓷支柱绝缘子进行了恒压升降法直流污闪试验,研究了高海拔条件下盐密、灰密以及绝缘子材质和几何形状等因素对其直流污闪特性的影响。
2.
Quantitative contrast experiment to study the relationship between DC flashover performance of composite insulators and component of non-soluble materials as well as hydrophobicity time was carried out.
研究了环境因素和污秽成分对高温硫化硅橡胶材料憎水性迁移特性的影响,对灰成分和憎水性迁移时间与复合绝缘子直流污闪特性的关系进行了定量对比试验。
2) DC contamination flashover
直流污闪
1.
Silicone rubber composite insulators have been extensively accepted in the region of external insulation, but up to now, it is not clear yet whether their DC contamination flashovers have polarity effect.
硅橡胶合成绝缘子正被日益广泛地用于电力系统外绝缘领域，但迄今为止，对合成绝缘子直流污闪是否存在极性效应这一问题未作详细研究。
4) flashover characteristic
污闪特性
1.
In order to provide a scientific reference for the constructions of DC transmission lines in high altitude areas,the flashover characteristics of two kinds of large tonnage insulators(porcelain and glass insulator) were investigated systematically in natural high altitude areas(1970 m).
为了研究实际高海拔条件下大吨位瓷和玻璃绝缘子染污放电特性,给高海拔地区特高压直流输电线路绝缘子的选择及外绝缘设计提供参考,在实际海拔1970 m条件下,利用±250 kV直流污秽试验电压,采用恒压升降法,对大吨位瓷和玻璃绝缘子的直流污闪特性进行了详细研究。
2.
Artificial pollution experiments was carried out with up-and-down method under direct current(dc)voltage in natural high altitude areas(1970 m)to analyses the effect of insulator profiles and suspension patterns on flashover characteristics of porcelain,glass,and composite insulators.
为了分析高海拔条件下瓷、玻璃和复合绝缘子伞裙结构及瓷绝缘子悬挂方式对直流污闪特性的影响规律,在海拔1970m条件下,采用恒压升降法,对瓷、玻璃和复合绝缘子的直流污闪特性进行试验分析。
3.
In order to provide a scientific reference for the constructions of UHVDC transmission lines,the flashover characteristics of three kinds of insulators(porcelain,glass and composite insulator) are investigated systematically in natural high altitud.
为给高海拔地区特高压直流输电线路绝缘子的选择及外绝缘的设计提供参考,在实际高海拔条件下采用恒压升降法详细研究了瓷、玻璃和复合绝缘子的直流污闪特性,其内容主要包括:不同悬挂方式和污秽分布情况对瓷绝缘子污闪特性的影响;2种大吨位玻璃绝缘子直流污闪特性的对比及550 kN玻璃绝缘子V串与I串污闪电压的比较;比较3类绝缘子直流污闪特性。
5) pollution flashover performance
污闪特性
1.
To meet the demand of selecting insulation for polluted high attitude localities in China,the authors simulated low air pressure under various attitudes by phytotron,through the experiments the pollution flashover performances of both clean and polluted insulator strings composed by seven pieces of XP-160 insulator under.
为满足我国高海拔地区污秽绝缘选择的需要,文章在人工气候室模拟不同海拔条件下的低气压,通过试验研究了清洁和染污7片串XP-160绝缘子在短波头操作冲击下的污闪特性,得出了盐密、气压、温度对污秽绝缘子50%操作冲击闪络电压影响的关系式,确定了三者的影响特征参数。
2.
The artificial pollution test is an important method for studying pollution flashover performance.
人工污秽试验是研究污闪特性的重要手段,IEC及我国标准推荐了多种人工污秽试验方法以进行绝缘子闪络特性的试验研究,并提出了几种不同的试验方式,目前常用的有均匀升压法、50%耐受电压法和最大耐受法,但对于不同试验方式下绝缘子污闪特性的差异仍需进行系统研究和比较。
6) contamination flashover performance
污秽闪络特性
1.
The results of the research on contamination flashover performance of DC insulator strings for ±500 kV HVDC system are presented and the ±600 kV artificial pollution test equipment for DC contamination in China Electric Power Research Institute(CEPRI)is described.
介绍了用于±500kV高压直流输电系统的直流绝缘子串污秽闪络特性的研究结果和中国电力科学研究院±600kV直流污秽试验装置,进行了与国外2个实验室的比对试验,验证了污秽耐受电压与绝缘子串长的线性关系,对污秽均匀分布和不均匀分布情况下的长串悬式绝缘子的污秽闪络电压特性进行了试验研究,得到了大量有价值的试验数据。
补充资料：直流
直流
Direct current
直流(direet。urrent) ，仅按一个方向流过电路或设备的电流称为直流。与交流电压相比，直流电压的极性是不变的。直流电流相当于电荷沿着闭合的电路以不变的方向流动或位移。直流电流和电压的幅值可以恒定，也可以随时间变化。 蓄电池和旋转发电机产生幅值恒定的额定直流电压，整流器产生幅值随时间而变的直流电压。整流器把交流电压变换为脉动的直流电压。 通常电站不是广泛地将直流电输配给一般用户，相反，在需要直流电(d。)能的场所，是把商业上合用的交流电(ac)能整流为直流电能。 「罗布(D.D.Robb)撰]
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条