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18.3.7 MAKING REACTIVE POWER SHARING ADJUSTMENTS (550 MULTISET WITHNO AVR CONTROL)In this situation, as reactive power sharing is controlled purely by the generator’s AVR, it is theAVR voltage setting that must be adjusted to make any changes to the kVAr (reactive power)share.Example: With two sets in parallel, and one generator is supplying more VAr than the other. Thevoltage setting of the AVRs must be adjusted slightly to transfer the share from one generator tothe other. Increasing the setting on one AVR has the effect of increasing that set’s share of thereactive power, and decreasing the other set(s) share of reactive power.As this will have slightly altered the generators output voltage, it should be checked to ensure thatit has not been altered by too much. This procedure may have to be conducted more than once,possibly adjusting the other AVR(s) a little the following times to ensure a suitable reactive loadshare between the sets, while maintaining a suitable off load generator voltage.NOTE: - Many AVRs have only a single turn potentiometer for adjusting the outputvoltage. This has the effect of making reactive power sharing adjustments very sensitive.Care should be taken to make small changes to the adjustment, and to ensure that thevoltage / VAr is stable (i.e. not changing) before further changes are made.NOTE: - Ensure the “Check voltage” window is suitably set to allow voltages to matcheven when the generator(s) already on the bus are loaded. Remember that a loadedgenerator with an AVR droop kit will give a lower voltage than an unloaded generator.66DSE Guide to Synchronising & Load Sharing PART 1 ISSUE5 18/3/04 AM
19 TYPICAL CONNECTIONS19.1 TYPICAL CONNECTIONS FOR A SINGLE 550 LOAD SHARE UNIT.TO OTHER 550 MSC CONNECTIONSMAX 250 METERS120 OHM SCREENED CABLETHE FIRST AND LAST UNITS MSCMUST BE FITTED WITH A 120 OHMRESISTOR ACROSS Mh AND MiDSE Guide to Synchronising & Load Sharing PART 1 ISSUE5 18/3/04 AM 67
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DEEP SEA ELECTRONICS PLCGuide to Sy
Page 3 and 4:
SectionTABLE OF CONTENTSPage1 BIBLI
Page 5 and 6:
18.3.1 MULTISET SETTINGS (NOT APPLI
Page 7 and 8:
3.1 CLARIFICATION OF NOTATION AND T
Page 9 and 10:
4.2 SINGLE SET NO BREAK RETURN WITH
Page 12 and 13:
4.5 MULTIPLE SET STANDBY TO MAINS S
Page 15 and 16: 5.2 CONTINUOUS PARALLEL OPERATIONEl
Page 17 and 18: 6 MULTIPLE GENERATORSThere are many
Page 19 and 20: Illustration6.3 MULTIPLE SETS (STAN
Page 21 and 22: 8 THE NEED FOR SYNCHRONISINGBefore
Page 23 and 24: 10 REQUIREMENTS FOR SYNCHRONISATION
Page 25 and 26: 10.3 55X CONTROLLER10.3.1 FUNCTION
Page 27 and 28: 10.3.3 AUTOMATIC SYNCHRONISINGAutom
Page 29 and 30: 11 LOAD SWITCHING DEVICESThe parall
Page 31 and 32: 12.3 CONNECTION DETAILSConnection t
Page 33 and 34: 12.3.4 LOCATION OF SW1 AND SW2 SELE
Page 35: 13.3 CONNECTION DETAILSConnection t
Page 38 and 39: 13.4.4 LOCATION OF SW1 AND SW2 SELE
Page 41 and 42: 15 55X MULTISET COMMUNICATIONS LINK
Page 43 and 44: NOTE: - Only the “end” modules
Page 45 and 46: 16 55X CONTROLLER CONFIGURATION FOR
Page 47 and 48: 16.2 AUTO SYNC SETTINGSGenerator Au
Page 49 and 50: Generator AutoSynchronising Setting
Page 51 and 52: Multi-set settingsFunctionMultiset
Page 53 and 54: 17.2 LOAD CONTROL(Only available on
Page 55 and 56: 18 ON SITE COMMISSIONING18.1 DISABL
Page 57 and 58: 18.3 55X CONTROLLER COMMISSIONING A
Page 59 and 60: 18.3.2 VIEWING THE 55X SYNCHROSCOPE
Page 61 and 62: 18.3.4 FREQUENCY SYNCHRONISER SETUP
Page 63 and 64: 18.3.5 VOLTAGE MATCHING SETUPSynchr
Page 65: Load Level SettingsFunctionLoad par
Page 69 and 70: 19.3 TYPICAL CONNECTIONS FOR A 556T
Page 71: 20 APPENDICES20.1 530 AS MAINS / GE
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