Under-frequency protection.pdf
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Transcript of Under-frequency protection.pdf
� � � � � � � � � � � � � � � � �� � � � � � � � � � � � �� � � � � � � � ! " # $ % & $ ' ! " ( ) $ * + ) , - . + - , ( + * * ) + / $ 0 1 ( 1 , 0 " & 0 $ 2 + $ , 0 ! - + / / + $ + %1 ! - - , " + " 1 3 0 $ 4 3 � , ( � 5 , " ( + - 0 & + # , - 1 ! $ . + " ( 5 6 + ) . - / + $ + 1 # & $ 0 61 � $ - 1 0 & 1 � - ) - 1 6 + " # - ! / / * , # & $ 0 6 0 " 7 " $ + 1 0 $ 89 / $ + 1 , 0 " + 1 * 0 3 & $ ' ! " ( ) 6 ! - 1 . * , 6 , 1 # 5 + * - 0 5 , " 0 $ # $ 1 0 + 2 0 , # # + 6 %+ 7 0 " 7 " $ + 1 0 $ - + " # 1 ! $ . , " - 8 : " ; + 6 / * 0 " 1 ! $ . , " & $ ' ! " ( ) * , 6 , 1 - , -- � 0 3 " , " < , 7 = > 8
? @ A B C D E F G H I J K L M L N N O N P K Q R K M S T J @ H @ U V N L P G V U K G H U R P W @ M K X N Y Z D [ \ ]^ " / $ + ( 1 , ( 5 / $ 0 * 0 " 7 # 7 " $ + 1 0 $ 0 / $ + 1 , 0 " + 1 * 0 3 & $ ' ! " ( ) ( + " 0 " * )0 ( ( ! $ 3 � " + 6 + ( � , " 3 , 1 � , 1 - * 0 ( + * * 0 + # , - - / + $ + 1 # & $ 0 6 1 � $ - 1 0 & 1 � " 1 3 0 $ 4 8� � " ( - - , 1 ) 0 & ! " # $ % & $ ' ! " ( ) / $ 0 1 ( 1 , 0 " � + - 1 0 . 2 + * ! + 1 # & $ 0 64 " 0 3 * # 7 0 & 1 � " 1 3 0 $ 4 + " # 1 � ( � + $ + ( 1 $ , - 1 , ( - 0 & 1 � 1 ! $ . , " $ ' ! * + 1 0 $ 8_ 1 + 6 1 ! $ . , " - + $ + * - 0 - " - , 1 , 2 1 0 0 2 $ - / # 8 < 0 $ * + $ 7 - 1 + 6 1 ! $ . , " 7 " $ + 1 0 $ - 5 0 2 $ % & $ ' ! " ( ) / $ 0 1 ( 1 , 0 " 3 , 1 � 0 " 0 $ 1 3 0 & $ ' ! " ( ) - 1 + 7 -- � 0 ! * # . , " ( * ! # # 8 � � / $ 0 1 ( 1 , 0 " 3 , * * / $ 0 2 , # + . + ( 4 % ! / & ! " ( 1 , 0 " & 0 $ 1 � - / # 6 0 " , 1 0 $ , " 7 # 2 , ( 8� � 6 , ( $ 0 % / $ 0 ( - - 0 $ . + - # 0 2 $ ` ! " # $ & $ ' ! " ( ) $ * + ) a b < c = d � + - 1 3 0& $ ' ! " ( ) 6 + - ! $ , " 7 - 1 + 7 - 3 , 1 � 3 , # & $ ' ! " ( ) - 1 1 , " 7 $ + " 7 + " # # & , %" , 1 1 , 6 # * + ) - 1 1 + . * ! / 1 0 = > - 8 � � 1 3 0 6 + - ! $ , " 7 - 1 + 7 - + $ - 3 , 1 ( � + %. * & 0 $ 0 2 $ % 0 $ ! " # $ & $ ' ! " ( ) , " # / " # " 1 * ) 0 & + ( � 0 1 � $ 8 < 0 $ 0 " 2 $ - , 0 " 0 & a b < c = d 0 " 0 & 1 � - 1 + 7 - + * - 0 ( 0 6 / $ , - - 6 + - ! $ 6 " 1 0 &$ + 1 % 0 & % ( � + " 7 0 & & $ ' ! " ( ) e # & ` # 1 f 8g $ 0 1 ( 1 , 0 " + - - 6 . * , - 5 1 ) / a : < c 5 3 , 1 � 0 " 0 $ - 2 $ + * a b < c = d ! " , 1 - 1 07 1 1 � $ ' ! , $ # " ! 6 . $ 0 & & $ ' ! " ( ) - 1 + 7 - 5 + $ + 2 + , * + . * 8< 0 $ & ! $ 1 � $ # 1 + , * - 5 - h ! ) $ i - j ! , #
k lk ml >l =l no - l - l > - o > 6 , " o > > 6 , " � , 6
p 0 " 1 , " 0 ! -0 / $ + 1 , 0 "q rstusvwxy z {|
