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5.4 Limiters

5.4.1 V/F Limiter

The V / Hz limit is active during the voltage control phase. It works by limiting the Generator voltage as the frequency falls below the

maximum frequency P.131. This operation can avoid the Generator over-ﬂushing in case of a reduction of speed.

5.4.2 Minimum excitation current: Under Excitation limiter

The limit of minimum excitation current is only active when the Generator is in parallel [digital input 52G (machine in parallel) closed].

It represents the minimum excitation current below which the Generator cannot work.

The relation between output voltage and frequency is:

V(Hz) = P. 100 * Hz

P.131 *

P.132

Parameter

Description (short)

Description

P.100
P.130
P.131

Gen. rated voltage

Gen. V/f Min freq

Gen. V/f Max freq

Generator rated voltage [V]

Generator minimum frequency ramp (Hz)

Generator maximum frequency ramp (Hz)

P.132

V/f slope

Generator V/f slope

Parameter

Description (short)

Description

P.002
r.900
r.901

F. UE Lim

OE/UE Lim reg KP

OE/UE Lim reg TI

OE/UE Lim reg TI

OE/UE Lim. Reg. KP

OE/EU Lim. Reg. TI

Machine voltage (%)

Gen. rated V

P. 132

min

freq

max

freq

Gen rated

freq

(Hz)

BELTRAME

CENTRO SERVIZI ENERGIA

Motor

Generator

Q+ (var)

overexcited

underexcited

Iemin

Q-

P (w)

Содержание S2014

Страница 1: ...Rev 4 0 BELTRAME CENTRO SERVIZI ENERGIA...

Страница 2: ......

Страница 3: ...NG MODES 5 FUNCTIONS DESCRIPTION 5 1 Soft Start 5 2 Compensation and Droop functions 5 3 Keep Alive 5 4 Limiters 5 4 1 V f Limiter 5 4 2 Minimum excitation current Under Excitation limiter 5 4 3 Maxim...

Страница 4: ...RAM 9 1 Introduction 9 2 Basic S2014 Connection Diagrams 9 3 S2014 Connection Diagrams with Low Voltage Alternator 9 4 S2014 Connection Diagrams with Medium Voltage Alternator 10 BELTRAME CONFIGURATOR...

Страница 5: ...ce It is scarcely possible for the operating instructions for technical equipment to cover every eventuality which can occur in practice We would therefore request you to notify us or our agent in the...

Страница 6: ...and repair work The maintenance personnel must be informed about the emergency shutdown measures and must be capable of turning o the system in case of emergency The maintenance personnel must be fam...

Страница 7: ...sed for the evaluation are EN 50178 Electronic Equipment for use in Power Installations EN 61000 6 4 Electromagnetic Compatibility EMC Generic Standards Emission Standard for Industrial Environments E...

Страница 8: ...synchronous machines This unit is suitable for this only application area The AVR can manage several regulations Among them Voltage regulation Field Current Regulation FCR Power Factor regulation PF...

Страница 9: ...ng the stator of the exciter This con guration shows a possible replacement of a Direct Current excitation machine SM Synchronous Machine E Exciter PMG Permanent Magnet Generator D Direct Current mach...

Страница 10: ...use the 4 MA through screws in two corners holes It is recommendable to use self locking nuts It is recommended also to bind the regulator back on a metal plate for better heat dissipation Connection...

Страница 11: ...tion output Voltage sensing input PE 2 3 4 5 6 7 8 AUX COM Ecc Ecc Vsense PE FX1 Power connections FX2 Current sensing inputs C1 Com Increase reference adjust Decrease reference adjust 52G status para...

Страница 12: ...r areas according to the regulations currently in force Only specially instructed personnel must carry out maintenance and repair work Terminal designation FX1 AND FX2 Power electronics supply ADC inp...

Страница 13: ...wer supply BELTRAME CENTRO SERVIZI ENERGIA S2014 CN3 COM Increase Decrease Parallel feedback Analog In Potentiometer adjust 6V AUX N C COM Increase Decrease Parallel feedback Analog In Potentiometer a...

Страница 14: ...compensation Field Current Regulation FCR It regulates the excitation eld current of the synchronous machine This operation mode is quite useful during commissioning and or troubleshooting PF or Var...

Страница 15: ...sence of a power transformer mounted after the Generator The droop function K 0 is recommendable in case of operation with more generators in parallel It applies a machine output voltage reduction acc...

Страница 16: ...ans that the S2014 during the start up will try to keep the excitation current to 5 of the rated excitation current P 000 Once the frequency will be higher the P 130 Generator minimum frequency the AV...

Страница 17: ...xcitation current below which the Generator cannot work The relation between output voltage and frequency is V Hz P 100 Hz P 131 1 P 132 Parameter Description short Description P 100 P 130 P 131 Gen r...

Страница 18: ...he curve of minimum capability represents the reactive power limit absorbed by the machine It is determined by interpolating 5 data Parameter Description short Description P 100 P 130 P 131 Gen rated...

Страница 19: ...171 5 4 6 S2014 Con g Limits status The S2014 Con g software reports an overview of the limiters status The reported limiters status shows that the V Hz underfrequency or underspeed limiter is active...

Страница 20: ...nt Regulation S2014 works in order to keep the excitation current to the ref value PF Control Power Factor Regulator S2014 works in order to keep the PF to the ref value VAR Control Reactive Power Reg...

Страница 21: ...the AVR output eld current In this case the AVR controls only the output current to the regulator excitation terminals without considering other e ects This situation can be potentially dangerous This...

Страница 22: ...6 once the 52G digital input generator in parallel is closed the VAR function starts to work Generator current reading is necessary to use this function Be aware of the correct VAR reading Parameter D...

Страница 23: ...Parallel VAR regulation the increase and decrease commands increase or decrease the Reactive Power value 6 6 Digital reference adjustment by analog inputs As above using the analog inputs Potentiomete...

Страница 24: ...or increase the value DOWN allows to move from a parameter or menu to the previous one and or decrease the value 7 2 Navigating inside the menus Once the S2014 is ON the display shows automatically th...

Страница 25: ...rs are immediately active they are not automatically saved To save them you need to use command C 000 save parameters BELTRAME CENTRO SERVIZI ENERGIA E P 100 400 399 401 increase decrease E M To con r...

Страница 26: ...ref Ramp slope Delta Ref calib Delta Ref analog Delta ramp slope F I Reg KP F I Reg TI G PF dig ref G VAR dig ref Ramp slope of P 000 Related to Aux supply period Capacitive Inductive of P 100xP 110 s...

Страница 27: ...otocol 1 Modbus RTU 8N1 2 Modbus RTU 8E1 3 Modbus RTU 8O1 4 Modbus RTU 8N2 0 0 I 401 5 605 RS485 bitrate 0 4800 1 9600 2 19200 3 38400 4 57600 5 115200 3 0 I 402 247 606 RS485 node ID 1 1 I 403 0 100...

Страница 28: ...P 110 100 100 P 161 5 1013 Q lim P 25 of P 100 x P 110 100 100 P 162 5 1014 Q lim P 55 of P 100 x P 110 100 100 P 163 5 1015 Q lim P 75 of P 100 x P 110 100 100 P 164 5 1016 Q lim P 100 of P 100 x P 1...

Страница 29: ...interrupted Check connection wiring Measure power supply Aux Com Check for tripped protective circuit breaker Check the built in fuse Check operating mode Check programmable digital input setting and...

Страница 30: ...y adjusting the set point Check setting of limiters Irregular instability i e sporadic over or under excitation which is not caused by grid variation Check droop compensation setting Check external cu...

Страница 31: ...L1 and L2 install the CT on phase L3 With sensing voltage between L2 and L3 install the CT on phase L1 CAUTION It is strongly recommended to completely disconnect the AVR in case of High Voltage Test...

Страница 32: ...FX1 CN3 9 2 Basic S2014 Connection Diagrams Following diagram shows how to connect the S2014 to a low voltage generator with Sensing voltage between phase phase max 500Vac L1 and L3 Aux power supply b...

Страница 33: ...ax 500Vac Aux power supply phase and neutral max 300Vac LV alternator with external power supply Sensing voltage phase phase max 500Vac Aux power supply from ext power supply max 300Vac LV alternator...

Страница 34: ...nator with external power supply Sensing voltage from Volt Transf max 500Vac Aux power supply from ext power supply max 300Vac MV alternator with Aux winding Sensing voltage from Volt Transf max 500Va...

Страница 35: ...xe It will open the Comm window To operate it is necessary to establish the communication between PC and AVR see the following instructions 3 Select here the COM door number 1 Select the Bitrate 38 4...

Страница 36: ...ately active but it is not stored inside the AVR memory This means that if you switch OFF the AVR the modi cation will be lost Save If the modi cation is correct press Save to store the new setting in...

Страница 37: ...tting P xxx Remaining on the Parameters windows click on the I label to access to I xxx setting As above remaining on the Parameters windows click on the R label to access to R xxx setting BELTRAME CE...

Страница 38: ...board display To update the values press R Page The readings can help the troubleshooting activities 10 6 Regulator Windows Selecting the Regulator window you can access read the following values Reg...

Страница 39: ...wing values Selecting the Trend window you have available a powerful tool for commissioning and or troubleshooting Above trend shows some step tests 5 on the reference voltage e ect 10 7 Input Output...

Страница 40: ...39 BELTRAME CENTRO SERVIZI ENERGIA...

Страница 41: ...40 BELTRAME CENTRO SERVIZI ENERGIA...

Страница 42: ...BELTRAME C S E s r l Tel 39 049 5965127 Via San Pio X 104 beltramecse com 35015 Galliera Veneta PD Italy info beltramecse com BELTRAME CENTRO SERVIZI ENERGIA...

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