Siemens 7VE51, Инструкция по эксплуатации

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-ETHOD OF OPERATION 6%
6
# ' #
0ARALLELING OF GENERATORS WITH SYSTEMS
&OR PARALLELING GENERATORS WITH NETWORKS THE DEVICE
CHECKS THE NETWORK AND GENERATOR VOLTAGES "OTH
VOLTAGE MAGNITUDES MUST LIE WITHIN THE VOLTAGE OPER
ATING LIMITS BOTH FREQUENCIES MUST LIE WITHIN THE FRE
QUENCY OPERATING LIMITS &OLLOWING STARTING THE RELAY
CHECKS THE VOLTAGE MAGNITUDES TO SEE WHETHER THE
SET VOLTAGE DIFFERENCE — 5 IS FALLEN BELOW
7HEN THE CONDITIONS ARE FULFILLED THE DEVICE CALCU
LATES THE CLOSING INSTANT FROM THE ACTUAL FREQUENCY
DIFFERENCE AND THE SET BREAKER OPERATING TIME AND
THEN OUTPUTS THE CLOSE COMMAND SUCH THAT THE VOLTA
GE PHASORS OF THE NETWORK AND GENERATOR VOLTAGES
AGREE AT THE INSTANT WHEN THE BREAKER POLES TOUCH
EACH OTHER
!UTOMATIC SYNCHRONIZING OF GENERATORS
&ULLY AUTOMATIC SYNCHRONIZING OF THE GENERATOR WITH
THE NETWORK IS POSSIBLE IN THE MODEL WITH FREQUENCY
AND VOLTAGE BALANCING 6% PROVIDED THE VOLT
AGE MAGNITUDES AND FREQUENCIES LIE WITHIN THE OPER
ATING RANGE 4HE FREQUENCY BALANCER OUTPUTS CONTROL
COMMANDS TO THE SPEED REGULATOR OF THE DRIVING MA
CHINE AND THUS ADJUSTS THE GENERATOR FREQUENCY TO
THE PARALLELING INSTANT OPTIMALLY AND IN A SHORT TIME
!T THE SAME TIME THE GENERATOR VOLTAGE IS MATCHED
TO THE NETWORK VOLTAGE BY MEANS OF CONTROL COM
MANDS TO THE VOLTAGE REGULATOR 7HEN SETTING THE DE
VICE IT IS POSSIBLE TO DEFINE WHETHER PARALLELING IS TO
TAKE PLACE ONLY IN THE OVERSYNCHRONOUS STATE ONLY IN
THE SUBSYNCHRONOUS STATE OR IN BOTH STATES OF THE
MACHINE
4HE DEVICE CALCULATES THE COMMAND INSTANT FROM THE
MEASURED VOLTAGES AS IN
0ARALLELING OF SYSTEMS
0ARALLELING OF NETWORKS WHICH ARE ALREADY SYNCHRO
NOUS VIA OTHER CONNECTIONS DEPENDS ON THE CONDI
TION THAT THE DIFFERENCE IN PHASE ANGLE BETWEEN THE
MEASURED VOLTAGES DOES NOT EXCEED A SET VALUE FOR
THE DURATION OF AN ADJUSTABLE TIME 4HE CLOSE COM
MAND IS OUTPUT IF THE FREQUENCY AND VOLTAGE DIFFER
ENCES ARE ALSO WITHIN THE SET LIMITS
!SYNCHRONOUS NETWORKS CAN ALSO BE PARALLELED 4HE
DEVICE THEN DETERMINES THE COMMAND INSTANT AS IN
)T IS POSSIBLE TO SET INDIVIDUALLY FOR EACH PARALLELING
LOCATION WHETHER ONLY ASYNCHRONOUS SWITCHING ONLY
SYNCHRONOUS SWITCHING OR BOTH ARE TO BE PERMIS
SIBLE
/UTPUT OF STATUS SIGNALS
6% CAN BE SET TO DELIVER STATUS SIGNAL SUCH LIKE
FREQUENCY TOO HIGH OR TOO LOW VOLTAGE TOO HIGH
OR TOO LOW AND PHASE ANGLE POSITIVE OR NEGA
TIVE 4HESE SIGNALS ARE THEN OUTPUT INSTEAD OF THE
BALANCING CONTROL SIGNALS 4HEY MAY BE PROCESSED
BY EXTERNAL DEVICES OR USED AS STATUS CHECK INFORMA
TIONS
)T CAN BE SELECTED WHETHER THE CLOSING COMMAND
SHOULD BE ISSUED ONLY FOR SYNCHRONOUS PARALLELING
WITHIN SETTABLE LIMITS OF VOLTAGE MAGNITUDE DIFFER
ENCE FREQUENCY DIFFERENCE AND PHASE ANGLE DIFFER
ENCE OR ONLY FOR ASYNCHRONOUS PARALLELING WITHIN
SETTABLE LIMITS OF VOLTAGE MAGNITUDE DIFFERENCE AND
FREQUENCY DIFFERENCE AND UNDER CONSIDERATION OF THE
CLOSING INSTANT AS EXPLAINED IN 3ECTION OR FOR
BOTH CASES