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基于三次谐波相角突变原理的发电机定子接地保护
24 12 Vol. 24 No. 12
200012 Pow er System Technology Dec. 2000
: 1000-3673 (2000) 12-0070-04
1 2 1 3
黄少锋, 孙 鹏, 王增平, 赵自刚
( 1. 华北电力大学电力系, 北京 100085; 2. 湖北电力调度通信局, 湖北省武汉市430077;
3. 河北电力调度通信局, 河北省石家庄050021)
A GENERATOR GROUNDING FAULT PROTECTION BASED
-
ON PHASE ANGLE MUTATION OF THIRD HARMONIC VOLTAGE
1 2 1 3
HUANG Shao-feng , SUN Peng , WANG eng-ping , HAO i-gang
( 1. North China Electric Power U niversity, Beijing 100085, China;
2. Hubei Provincial Power Dispatch Communication Bureau Wuhan, 430077, Hubei Province China, ;
3. Hebei Provincial Power Dispatch Communication Bureau, Shijiazhuang 050021, Hebei Province, China)
ABSTRACT: On the basis of the theory of phase-angle 3
mutation of third harmonic voltage a protection scheme
for generator stator grounding fault and its algorithm are , 3
put forward. T his scheme is com pared with micro-computer
,
protective schemes based on other protection principles,
comparison result show s that this scheme is applicable for ,
large capacity generator w ith all kinds of grounding system, :
especially it is of high sensitivity under arc suppression coil [ 1]
( 1) 3 ;
grounding or non-grounding. Otherw ise, This scheme pos- [ 2]
(2) 3 ;
sesses high reliability and is not prone to affected by surge, [ 3]
( 3) 3
suppressors installed at the terminals of large generat or.
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