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继电保护英文专业词汇

作者:高考题库网
来源:https://www.bjmy2z.cn/gaokao
2021-01-30 07:35
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2021年1月30日发(作者:hang)


电网结构、电源分布、负荷水平、电网规模、供电可靠性;大系统理论、分层决

< br>策、分层控制控制方式:局部控制;统一决策、集中控制;分散决策、分散控制;分


层决策、分层控制;




N-1


标准、输电系统静态安全评估标准之一;




N-1


标准:系统中



1


个发电机组或


1


个电网设 备


(


线路、电缆、变压器


)

< p>
退出运行时,系统仍应能维


持运行。停电损失;系统运行涉及的备用主要有 负荷备用和事故备用。稳定控制


技术:就地分散型装置向区域分布式系统发展。防止区域 性频率崩溃的连锁切负荷


局部故障、保护及控制装置的拒动或误动、

不适当或不及时的手动措施、


导致一系列相


继故障或连锁开 断系统的充裕行、经济性和可靠性;




the


liberalization


of


electricity


market,


economical


benefits


,




the


grid


has


to


be


operated


with


maximized


transfers



physical


constrains;


outage,


partially


black-out,


complete


black-


out;



available


transmission


capacity(ATC)




突然损失发电机或线路:


sudden


loss


of


a


generator


or


transmission


line.



负荷突然增加或减少:


sudden


load


increases


or


decreases



短路和开关操作:


short


circuits


and


switching


operations.



三相和对地短路:


three- phase


and


line-to-ground


faults



短路器:


circuit


breaker



暂态过电压和电流:


transient


overvoltages


and


currents



雷击:


lightning


strikes



电涌放电器:


surge


arrester



相量:


phasor


,通常用复数


phasors



瞬时功率:


instantaneous


power



特别地:


In


particular,



正弦电压或电流:


A


sinusoidal


voltage


or


current


at


constant


frequency







最大值:


maximum


value



有效值:


effective


value



平均值:


average


value




坐标系实轴:


real


axis



坐标系虚轴:


imaginary


axis



相量图:


phasor


diagram


for



无源元件:


passive


elements



电阻、电感、电容、电抗:


resistor,


inductor,


and


capacitor,


reactance,



感性、容性:


inductive,


capacitive



有功功率:


real


power


or


active


power



无功功率:


reactive


power



功率因数:


power


factor



功率因数角:


power


factor


angle



A


single-phase


source


delivers


100kW


to


a


load


operating


at



a


power


factor


of


0.8


lagging.





物理意义:


The


physical


significance


of



与…同相位:…


be


in


phase


with




Example



For


a


purely


resistive


load,


the


current


into


the


load


is



in


phase


with


the


load


voltage.



如式(


2.1


)所示:


As


indicated


by


(2.1),



……落后

< p>
(


超前


)


…多少相位:< /p>


The


current


lags



leads



t he


voltage


by


90.



正弦稳态:


sinusoidal- steady-state




a< /p>



b


,得到:



Letting


a=b


gives





按照惯例(通常):




By


convention,


the


power


factor


cos(a-b)


is


positive.



时间区间:



a


time


interval


T.


Example:


The


total


energy


absorbed


by


a


load


during


a


time


interval


T


.





定值:


rating.



例:额定功率-


power


rating


;发电机额定功率-



power


rating


of


electric


generator




额定电压:


voltage


rating.





基尔霍夫电流(电压)方程:



Kirchhoff



s


current(voltage)


law




节点方程:


nodal


equations



导纳矩阵:


admittance


matrix




N


个节点电压构成的列相量:



column


vector


of


N


bus


voltages



对角元素:



diagonal


elements



非对角元:



off-diagonal


elements



自导纳:



self-admittance;


driving- point


admittance



互导纳:



mutual


admittance;


transfer


admittance



美国



8.14


大停电:



The


US


blackout


on


14


August,


2003



…对…



将产生深远影响:



The


blackout


will


have


huge


technical


and


organizational


cons


equences


for


the


US


power


industry.



当地仅存的无功电源无法维持电压:



The


existing


local


reactive


power


sources


were


not


able


t


o



support


the


voltages.



切除线路:



trip(tripped)


the


lines.




The


isolated


part


suffered


from


low


voltage


and


a


severe


de


ficit


of


generation.






电力系统稳定是指…:



Power


system


stability


refers


to


the


ability


of


synchronous


-


-


-


-


-


-


-


-



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