【简答题】如图所示电网中线路AB及BC均装有三段式距离保护(第Ⅲ段采用全阻抗继电器),试整定计算保护1各段的动作阻抗ZDZ,并进行灵敏度校验(若灵敏度不满足要求,不要求采取措施)。第Ⅲ段灵敏度校验按近后备进行校验。设线路长l=60km,线路阻抗按0.4Ω/km计算,K I K =0.85,II段K II K =0.8,III段K III K =1.25,K h =1.15,K zq =2.5,相邻线路BC考...
【单选题】Usually the low interest rate currency trades at a______to the high interest rate currency in the forward market.
【简答题】Liner rate are usually high.
【单选题】按照我国的技术要求,距离保护振荡闭锁使用()方法。
A.
由大阻抗圆至小阻抗圆的动作时差大于设定时间值即进行闭锁
B.
由故障起动对I、II段短时开放,之后发生故障需经振荡闭锁判别后动作
【简答题】Inflation rate in Turkey used to be very high.
【简答题】In India there is a high divorce rate
【单选题】下列对工作分析访谈法的优点陈述错误的是
D.
可以唤起工作者的职责意识,规范其行为,从而有利于以后岗位描述的推行
【多选题】What caused the high incarceration rate in the US?
B.
Expansion of private prisons
C.
“Tough-on-crime” policy
【单选题】A high rate of separation between oil and water is favored by ().
A.
large size of oil globule