pcc new update rev3100 taken from salala.ppt

8/9/2019 pcc new update rev3100 taken from salala.ppt

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Control Panel Construction

Control panel is designed as a sealed-membrane, gasketed enclosure

Control system tested for voltage surge withstand capability according to IEC 80!"

#evel " $minimum %000 volts&

'll components are tested and proven to tolerate vibration and severe temperature

e(tremes

)ested for *+I and EI emissivity and susceptibility in accordance with CE*egulations

perating temperature -%0 .egC to /0 .egC

umidity 1"2 non-condensing



2 3ilowatteter +re4uencyeter 'C 5oltmeter 2 'C'mmeter

6ystem Control6election6witches

5oltage eter6cale

Indicator#amp

Phase

6elector6witch withIndicators

Emergency6top 6witch

enu 7ome6witch

Panel #ight6witch

6elf )est6witch

6tatusIndicators9:arning96hutdown9;on-'utomatic

.igital .isplayand 6tatus

Panel < #ine=><Character #E.

.isplay

*eset 6witch

*un=ff='uto6witch $3ey

6witchptional&

?reaker #amps @

Control 6witches

+ront Panel perations



+unctions are segregated into several

boards for ease of troubleshooting @

replacement

?oards are standard between all PCCs .IAI)'# ?'*. - Contains Intel 88B

processor @ operational software,

connects to all other boards

C6)! I;)E*+'CE - 6ignal conditioning of

'C sensing @ status monitoring of all cust!

signals $rem start, etc!&

';'#A - Interprets all analog signals

for .igital ?oard

E;AI;E I;)E*! - Connects to all engine

sensors and drives '5* @ governordriver modules

.I6P#'D - .rives meters and front panel

display

;E):*3 I;)E*+'CE - Connects to

P#C for transfer of all data @ status

Internal ?oards



6ystem 'rchitecture @ E(ternal ?oards

P)=C) - Potted module,

mounted on alternator,

transforms from %00-B00 5'C

to 85'C! .ifferent part s fordifferent voltage ranges

?6 P) - Potted module,

mounted in ACP, transforms

%00-B00 5'C to 85'C!

.ifferent part s for different

voltage ranges

5#)'AE *EA .*I5E* -ounted on alternator, drives

main field via PA power

A5E*;* .*I5E* - ounted

in ACP, provides 0-<00m'

signal to governor actuator

driver

PCC contects to % potted modules

for voltage and speed controlF

?us

P)

>-Phase

?us 5olts





'larm and 6tatus .isplay

igh intensity screen displays alarm and status messages

.ual element #E.s provide long lamp life and minimiGe Hnuisance service calls for

lamp replacement

6ervice codes in display provide a clear indication of problems and reference to

operators service manual=troubleshooting guide 6tatus messages can be displayed in English, +rench, 6panish, Aerman

@Portuguese

.isplays measurements in either etric or !6! 6tandard



?ase Engine Protection

PCC :arning and 6hutdown essages

: J :arning

6.J 6hutdown

vercrank$6.&

+ail-to-Crank$6.&

verspeed$6.&

Engine )emp6ender

$:&

Pickup +ailure$6.&

igh )emp$: @ 6.&

il Pressure6ender

$:&

#ow )emp$:&

#ow Pressure$: @ 6.&

#evel$: or 6.&

agnetic Pickup

Engine

6tarter 6ender ilCoolant

EE*AE;CD

6)P



'C utput etering

i( of conventional analog

and digital metering

+our analog meters

provide instant visual

indication of operating

trends )he kilowatt meter and

ammeter are scaled in

percentage $2& of rated 'C

output for instant

indication

'ccurate digital display of

all phases simultaneously

to monitor load and voltage

balance

K=- <2 'ccuracy

'C 'mmeter

$Percent 'mps&

'C 5oltmeter

+re4uency eter

3ilowatt eter

$Percent #oad&

pper and #ower

6cale Indicator

Phase 6elector

6witch and Indicators

'lphanumeric .isplay of

.igital eter 5alues



?asic PCC perations

Current 6ensing

5oltage 6ensing

Pulse :idth odulation

5oltage *egulation

Aoverning

)or4ue atching $5olts=G& Control

6tart=Crank and H6mart 6tarting Control

'lternator Protection and 'mp6entry



Current 6ensing

6pecial C)s with 0!""amp full load output

at Aenset full ampere output are installed

in alternator enclosure PC=C) module converts 0!"" 'mp C)

output to appro(! !" 5'C for customer

interface @ analog baords

EI filtering on cust! interface board

+ull wave rectification on analog board

eavy filtering on analog board for

display and power calculations #ight filtering for short circuit regulation

$>002 for all types of faults&

Certain signals are multiple(ed to

conserve analog channels on .igital

?oard



5oltage 6ensing

> possible P)=C) odules are used to

transform up to B005'C alternator ouputto 85'C for customer interface and

analog boards $<085, %00, B00 5'C #-#&

LB005'C Aensets are fitted with <%0 5'C

#-# control voltage transformer for

connection to <085 P)=C) odule

EI filtering on cust! interface board

+ull wave rectification on analog board

eavy filtering on analog board fordisplay and power calculations

#ight filtering and high spped sampeling

for >-phase average used in voltage

regulation control



Pulse-:idth odulation

)he PCC 5oltage *egulator and

Aovernor .river potted modules

are driven by >3hG pulse width

modulation signals

)he ratio of Hon time versus Hoff

time of the drive pulse changes in

response to changing losd on the

engine and alternator

)he ratio of on time to the total time

$( 00& is the duty cycle in

percentage

)otal time is constant for fi(ed

$>3hG& signal

Aovernor and *egulator duty

cycles are displayed on PCC front

panel

Increased duty cycles coorespond

to more actuator displacement and

high altrnator field current



5oltage *egulation - .river odule

Power for voltage regulation is

from alternator PA

>-Phase average measured voltage

is compared with desired voltage in

microprocessor

5oltage error is calculated as$desired voltage - actual voltage&

Proportional=Integral=.erivative

$PI.& control loop is used to voltage

error to 0 via adMustable Aain,

Integral, and derivative $damping&

terms

Aain and Intergral tems are

adMustable from PCC front panel

.igital ?oard outputs appro(! <

5.C P: drive signal to *egulator

.river ?oard

*egulator .river board amplifies

P: signal and drives e(citer field

of alternator

>-Phase

full wave

diode

bridge

-phase

E(citer +ield

PA

K

-

'ppro(!

>00 5.C

P: 6ignal from PCC

opens and closes

this switch

If

P:

6ignal

If

$field current&



5oltage *egulation

>-phase

'verage

>-Phase average measured voltage

is compared with desired voltage in

microprocessor

5oltage error is calculated as

$desired voltage - actual voltage&

Proportional=Integral=.erivative$PI.& control loop is used to voltage

error to 0 via adMustable Aain,

Integral, and derivative $damping&

terms

Aain and Intergral tems are

adMustable from PCC front panel

.igital ?oard outputs appro(! <

5.C P: drive signal to *egulator

.river ?oard

*egulator .river board amplifies

P: signal and drives e(citer field

of alternator

E(citer

$phase, stator&

E(citer

*otor

$>-phase&

*otating

.iodes

ain

+ield

$rotor&



Aoverning - .river odule

:oodward

Proact >.river odule

$0-<00m' Input&

K

-

P: 6ignal from PCC

opens and closes

this switch

<%5.C

from

ACP

?atteries

P: duty cycle from PCC is

clamped for <<2 ma(imum for

<00m' ma(imum output to

:oodward .river module

:oodward .river input is not highly

inductive, and hense 0-<00m'signal is not a flat .C signal as is

desired

6light, high fre4uency actuator

instability may result from this

signal incompatibility

' >3hG version of the :oodward

.river module is underdevelopment!

#ower governor gain settings may

be re4uired in short term to

stabiliGe engine at idle speed





5olts=ertG Control on )ransients

)o improve transient response,

the PCC automatically reduces

output voltage when the output

fre4uency is reduced!

)he tor4ue demands on the

engine is reduced as voltage isdrcreased

5oltage reduction starts at G

below nominal and in reduced

linearly as fre4uency drops!

5olts=G slope is adMustable on

the PCC front panelk-

B/

k->1 kJ" kJ





'lternator .amage Curve

' thermal damage curve for the

alternator is used as the basis for

the alternator overload and

overcurrent protection features of

the PCC

)hermal damage curve isF $Per-unitcurrent-& < ( ) J >B

?ase point is ! p!u! current for

hour $>B00 seconds&

)he ma(imum listed industrial

rating at the minimum voltage

setting for the winding defines !0

p!u! curremt

)emperature base is %0.egC

ambient with cold windings



'mp6entryN Protection

Auards the electrical integrity of the power system from the effects of overcurrent,

over=under voltage, over=under fre4uency and overload

Current is regulated at >002 for both single and three-phase short circuits

verload signal can be used to shed load

Provides a degree of protection for load connected e4uipment

IA 'C 5#)'AE$"1& - 6hutdown for 'C 5oltage e(ceeding 02 for 0 seconds or

>02 $instantaneous&

#: 'C 5#)'AE $</& - 6hutdown for 'C 5oltage below 8"2 for more than 0

seconds

5E*C**E;) $"& - 'C )ime vercurrent e(ceeds generator thermal limits $for

currents O/"2 at time of shutdown

6*) CI*CI) $"0="& - 'C )ime vercurrent e(ceeds generator thermal limits $for

currents L/"2 at time of shutdown

;.E*+*EE;CD - $8u& - 'C +re4uency was below 102 of rated for <0 seconds




Current in 'mperes at %" 5olts

1 0 0

1 0 0 0 0

2 0 0 0 0

1000

100

10

1

0.1

.01

0 .

5

Aenerator

+ull #oad

'mps - >%/<'

inimum

Instantaneous

)rip 6etting $>(&

)ypical Circuit

?reaker

3 0 0 0 0

a(imum

Instantaneous

)rip 6etting $8(&

Aenerator

.amage Curve ) i m e i n 6 e c o n d s

' typical generator

damage curve and

overcurrent

protection for a %"5,

<000 k: Aenset

Circuit ?reakers donot always provide

ade4uate overcurrent

protection for

alternators $trip

characteristic falls

outside thermal

damage curve&




1 0 0

1 0 0 0 0

2 0 0 0 0 0

1000

100

10

1

0.1

.01

0 .

5

Aenerator

+ull #oad

'mps - >%/<'

3 0 0 0 0 0

Aenerator

.amage Curve $red&

'mp6entry

)rip Curve $green&

*egulated

6hort-CircuitCurrent $>002&

)ypical ?reaker

Current in 'mperes at %" 5olts

) i m e i n 6 e c o n d s

'mp6entryProtection for a %"5,

<000k: Aenset, with

a typical downstream

distribution circuit

breaker

'mp6entry provides

complete overcurrentprotection and

allows selective

coordination with

downstream

breakers



'mp6entryN +or Paralleling

*E5E*6E P:E* $><& - *eal power flowing I;) the Aenset e(ceeds a preset limit

for a preset timeQ 'dMustment range of "2 -"2, -" seconds

#66 + +IE#. $%0& - *eactive power flowing I;) the Aenset is beyond the Aenset

stability limits as defined by following curveF

E4uation which defines curve

is F kw K kvar = tan8 deg J kw

intercept

+ault occurs if $kw2-k5'*2 (

0!/& L kw intercept2

k: intercept point is

adMustable from 0!B tp !% pu

35'*

)ime delsy is adMustable from

<-0 seconds

6lope of trip characteristic is

constant

8 degrees(theta)

.4

.16

1.12 2.8

KVAR(P.U.)

KW(P.U.)



'mp6entryN +or Paralleling

P'6E *)')I; - Phase rotation of Aenset and ?us do not match! Circuit breaker

is inhibited from closing! ;o adMustments!

?*E'3E* +'I# ) C#6E - ?reaker failed to close when commanded! 'dMustable for

++, :arning, or 6hutdown with an associated time delay setting

+'I# ) 6D;C*;IRE - Aenset failed to fall within sync check window $customer

defined& for the specified time! )ime delay setting of 0-<0 seconds! 'dMustable as++, :arning, or 6hutdown

+I*6) 6)'*) $6IA;'#& +'I#*E - PCC received no signal from 6ystem aster +irst

6tart 6ensor module for a preset time period! 'dMsutable from "-<0 seconds! +i(ed

as :arning!



PCC Isolated-?us Paralleling +eatures

aster +irst 6tart 6ensor and ains +ailure peration

Circuit ?reaker Control @ ?reaker Inhibit +eature

6ync Check

Aenset to ?us 6ynchroniGing

k: and k5'* #oad 6haring

Isloated ?us *amping in #oad .emand ode

Paralleling Connections and perational $6tate& .iagrams



aster +irst 6tart 6ensor @

ains +ailure peration

' aster +irst 6tart 6ensor

$+66& is a module used with

PCC Aensets to allow first-ready,

first-close control for multi-

Aenset, mains failure systems

)he +66 supplies se4uencedpulses to all of the Aensets

% pulses are given in a second

time period

:hen a PCC senses a low-to-high

transition, its volts and fre4uency

are L102 rated, and it senses a

dead bus, the breaker is

commanded to close

:hen the first gensets breaker

closes and energiGes the bus, the

other gensets breakers are

inhibited from closure until

synchronous conditions are met!

100 msec

125 msec

1 sec

First start master ot!t

"# c$osese%se 1st start

&o$tage o% 's

100msec

0 msec

125 msec

20 msec

"ircit 'reaer timi%g

ca% 'e se%sed *e+t set sees

1 start !$se

gi&e "# c$ose comma%d ', other sets



aster +irst 6tart 6ensor @

ains +ailure peration

aster +irst 6tart 6ensor ?ackup ControlF

If no low to high transition is sensed from the aster in 0 seconds $adMustable from

"-<0 seconds& the PCC assumes the +66 has failed and closes the Aenset breaker

to a dead bus!

:hen this condition is sensed, a +I*6) 6)'*) :'*;I;A fault is displayed!

)o prohibit multiple Aenset breakers from closing at the same time, the +66 timout

setting must be set differently on each Aenset in the system! ' seperation of 0

seconds is reccomended!



C? Control @ C? Inhibit

') C? PE; - )he PCC will automatically open the Aenset circuit breaker ifF

– a) A shutdown fault occurs OR

– b) The RUN/O/AUTO sw!tch on the "## !s $laced !n the O $os!t!on OR

– c) The RUN/O/AUTO sw!tch on the "## !s !n the AUTO $os!t!on and a #%

&N'&%&T s!(nal !s rece!ed. The c!rcu!t brea*er w!ll !++ed!atel, o$en and re+a!n o$en

as lon( as the !nh!b!t s!(nal !s act!e.

') C? C#6E - )he PCC will automatically close the Aenset circuit breaker if the

*;=++=') switch is in the ') position, the #% &nh!b!t s!(nal !s O -the

brea*er !s !nh!b!ted fro+ auto closure w!th an act!e &N'&%&T s!(nal) AN

– a) The bus !s l!e -as sensed b, %us "T +odule) and the $er+!s!e s,nc cond!t!ons

hae been +et OR

– b) The bus !s dead the enset freuenc, and olta(e 40 rated and a 6aster !rst7tart $ulse !s rece!ed OR

– c) The bus !s dead and the !rst 7tart a!lure alar+ !s act!e -&.e. the !rst 7tart

a!lure t!+out has occured).



';'# C? C#6E - )he PCC will close the circuit breaker in responce to the front

panel close pushbutton if the *;=++=') switch is in the *; position ';.F

– a) The enset reuenc, 8 9olts are 40 rated AN the bus !s dead OR

– b) The bus !s l!e and and s,nc cond!t!ons are +et -a d!(!tal s,nchrosco$e !s !ncluded

!n the d!s$la, (!!n( :/; bus;to;(en de(rees and a <=> !nd!cator when s,nc cond!t!ons

are +et) – ;)E The #% &N'&%&T s!(nal !s NOT reco(n!sed !n the RUN $os!t!on and w!ll not

!nh!b!t +anua closure b, the close $ushbutton !f the aboe cond!t!ons are +et.

';'# C? PE; - The "## w!ll o$en the c!rcu!t brea*er !n res$once to the front $anel

o$en $ushbutton !f the RUN/O/AUTO sw!tch !s !n the RUN $os!t!on.

C? Control @ C? Inhibit

C? PE;C#6E 6IA;'# )DPE - The "## has one !nternal #% control rela, fro+ wh!ch

2 !slated contacts are su$$l!ed one for #% o$en and one for #% close -&.e. one nor+all,o$en ad one nor+all, closed contact fro+ the sa+e control rela,). or certa!n t,$es of

c!rcu!t brea*ers a dela, between release of the o$en/shunt tr!$ s!(nal and enabl!n( of the

clsoe co++and !s reu!red for $ro$er o$erat!on -the brea*er +a, tend to <loc* u$>. &f th!s

case ar!ses a rela, to !solate the o$en s!(nal after the brea*er !s o$en can be used. ?@act

reu!re+ents w!ll de$and on s!te;s$ec!f!c w!r!n( cond!t!ons.



6ync Check

)he PCC performs a permissive fuction by monitoring the phase and voltage

difference between the Aenset and bus and using this information to decide when to

allow the set breaker to close

)hepermissive function is active in the ') and *; positions



)he following conditions must all occur before the permissive function will allow

automatic or manual closure of the Aenset breakerF

a) "hase d!fference between the enset and the bus +ust be less than 20 de(rees

-adustable fro+ front *e,$ad between 5 and 20 de(rees)

b) "hase d!fference +ust be decreas!n( -towards 0) OR less than 10 de(rees -th!s !nh!b!ts

closure of brea*er as $hase d!fference !s !ncreas!n( at a rate fast enou(h to cause brea*er

closure at 20 de(rees d!fference)

c) 9olta(e d!fference between enset and bus !s less than 5 -olta(e +atch!n( !s

standard on "##)

– d) "hase rotat!on between enset and bus !s correct after other s,nc cond!t!ons are

+et

– e) All of the aboe cond!t!ons are +et for (reater than 0.5 seconds -adustable fro+

0.5 to 5 seconds) If a breaker clsoe signal is given and the phase difference moves out of the

permissive window the breaker close signa is removed until the conditions are re-

met!

6ync Check



6ynchronising

)he PCC syncroniGer senses the Aenset voltage and fre4uency=phase and compares

it to the bus voltage and fre4uency=phase! )he control adMusts the Aenset voltage

and engine speed to match the bus!





#oad 6haring

' five wire, shielded cable $two for k:, <

for k5'*& connects Aensets togreather

for isochronous k: and k5'* load

sharing! ;o droop C)s or cross current

compensation is re4uired for 5'*

sharing!

' current proportional to the 2kw=

2k5'* carried by the set is produced

by each PCC Aenset! Connecting the load share lines

togreather produces a load share line

voltage which is proportional to the

2kw=2k5'* re4uired by each set for

e4ual load sharing!

Each PCC compares this reference

$5pwr& with its sensed k:=3var $5kw;&to derive an error signal $5ils&!

' adMustable PI. loop in each PCC is

used to drive the error to 0 $I!e! correct

the set for perfect load sharing



Isolated ?us *amping in #oad .emand

Eoad e+and !s a ter+ used to descr!be a control s,ste+ wh!ch auto+at!call, adusts the

nu+ber of ensets runn!n( -!n a +ult!;set s,ste+) to $roh!b!t runn!n( of ensets at er,

low load. ensets are auto+at!call, shutdown and restared as the load decreases and

!ncreases. The shutdowns are usuall, done accord!n( to so+e $redeter+!ned or custo+er

selected $r!or!t,.

To +a!nta!n bus stab!l!t, as ensets are added and deleted fro+ the -load;shar!n() s,ste+.

the "## has an !solated bus ra+$!n( funct!on to (entl, ra+$ ensets !n and out of loadshare w!th other "## ensets.

Fhen a enset o$erat!n( !n load share +ode w!th other ensets !s (!en a Eoad e+and

7hutdown s!(nal -fro+ a 6aster #ontroller) the enset w!ll ra+$ the *F fro+ the $resent

load share leel to an $reset unload leel at a $reset ra+$ unload rate. The *9AR leel !s

reduced b, 25/second to +!n!+!Be brea*er o$en!n( curent. Once the enset reaches a

$reset unload leel the brea*er !s o$ened and the set !s sw!tches to cooldown +ode.

After cooldown the enset !s shutdown and a EOA ?6AN 7'UTOFN +essa(e !s

d!s$l,ed on the front $anel.

Re+oal of the Eoad e+and 7hutdown s!(nal w!ll cause restart of the enset re;

s,nchron!sat!on and closure to the bus. The *F load !s then (entl, ra+$ed fro+ 0 to the

load ahre leel.

&f the bus freuenc, !s (reater than 1 hertB below no+!nal the ra+$ load !s canceled and

the enset !++ed!atel, assu+es !tDs $ort!on of the load.



Isolated ?us *amping in #oad .emand

Three ar!ables are adustable !a the front $anel to set the !solated bus ra+$!n( funct!on

1) *ampS#oadS)ime

Adust+ent Ra+(e 5;400 seconds

efault 30 seconds

unct!on 7ets the no load to full load *F ra+$ t!+e. T!+es to loads

other thatn 100 are $ro$orat!onal -&.e. t!+e fro+ 0 load to

50 load !s 0.5 G Ra+$HEoadHT!+e2) *ampSnloadS)ime


efault 30 seconds

unct!on 7ets the full load to no load *F ra+$ t!+e. T!+es fro+ loads

other thatn 100 are $ro$orat!onal -&.e. t!+e fro+ 50 load

to 0 load !s 0.5 G Ra+$HUnloadHT!+e

3) *ampSnloadS#evel

Adust+ent Ra+(e 0;100

efault 5

unct!on 7ets the unload leel at wh!ch the "## w!ll auto+at!call,

o$en the brea*er and be(!ne controlled shutdown of the

enset.



Paralleling Connections - Isolated ?us

)o enable multiple PCC Aensets to

synchroniGe to a common bus and

share k: and k5'* load proportionally,

minimal interconnections are re4uiredF

1) enset c!rcu!t brea*er $os!t!on and o$en

close w!r!n(

2) %us olta(e sens!n( !a a %us "T

+odule

3) *F/*9AR load share w!r!n( between all

ensets

C)677 and w!r!n( fro+ !t to all ensets

5) Re+ote start !n$ut fro+ ut!l!t, olta(e

sensor or 6aster #ontroller



Paralleling Connections with aster Control

6ystems with a aster Controller may

re4uire the following additional

interconnectionsF

1) 7u$er!sor, control of the enset

brea*er !a the #% &nh!b!t funct!on

2) Eoad e+and lo(!c !n the 6aster and

connect!on between !t and the Eoad

e+and 7hutdown !n$ut of of the "##

ensets.



RU*

-*"

$i&e/'s

A*

read,/to/$oad

A -3AR4R - P

i%/s,%c A*"# %hi'it

-6itch 7 FF

"-4

84* "#

ge%/c'/c$osed

Remote -tart

-6itch 7 FF

"

W*

-9P

ge%/c'/o!e%

P4* 84*

#R4AK4R

coo$do6% 9

e+!ired

"RA*K

8V

RA:P

Remote -tart

-6itch 7 *

(8e% i% AU9)

("# %hi'it

-6itch ma,

'e o% ; ser

discretio%)

Remote -tart

-6itch 7 *

8o& ram! com!$ete

8e%set st rated s!eed

dead/'s

A*

read,/to/$oad

A*

"# %hi'it -6itch 7 FF

A*:F-- or :F-- 9imot

Isolated ?us Paralleling

- 6tate Control .iagram



PCC tility Paralleling +eatures

Ut!l!t, "arallel!n( 6odes of O$erat!on

%ase Eoad o$erat!on a(a!nst ut!l!t,

&+$ort/?@$ort #ontrol w!th 7,ste+ 6aster "arallel!n( #onnect!ons for %ase and &+$ort/?@$ort #ontrol

O$erat!onal -7tate) #ontrol !a(ra+



tility Parallel - odes of peration

The "## !s conf!(urable !n two d!fferenct +odes of ut!l!t, $arallel!n( ; 6ult!$le 6ode and

7!n(le 6ode.

7elect!on of the 6ult!$le 6ode allows the enset to o$erate !n both !solated bus load

shar!n( +ode and ut!l!t, $aralle!n( +ode. The 7!n(le 6ode !s a s$ec!al +ode of software des!(ned for s!n(le enset to s!n(le ut!l!t,

su$$l,/brea*er. 7elect!n( 7!n(le 6ode w!ll d!sable load shar!n( ca$ab!l!t,.

All #F ensets are currentl, set and sh!$$ed !n the 6ult!$le 6ode. #onf!(urat!on to the

7!n(le 6ode should onl, be done $r!or to enset sh!$+ent s!nce a s$ec!al 6aster

#ontroller !s reu!red for $ro$er o$erat!on !n th!s +ode.



tility Parallel - ultiple ode

?ase #oad peration

"## ensets are eas!l, conf!(ured for %ase Eoad ut!l!t, $arallel!n( o$erat!on.

&n %ase Eoad +ode the enset w!ll (oern the *F and *9AR load -!nstread of olta(e and

freuenc,) based on a $reset base load sett!n( and $ower factor set$o!nt.

To conf!(ure a enset for %ase Eoad 6ode the follow!n( four ar!ables +ust be set !a the"##Ds front $anel

1) Ut!lHbaseHload

Adust+ent Ra+(e 0;100

efault I0

unct!on 7ets the base load *F set$o!nt. Fhen $arallel!n(

w!th the ut!l!t, the control w!ll hold out$ut *F at th!sload !rres$ect!e of bus olta(e or freuenc,.



2) Ut!lH"fHleel

Adust+ent Ra+(e 0.I-la() to 1.0

efault 1.0 -un!t,)

unct!on 7ets the $ set$o!nt. Fhen $arallel!n(

w!th the ut!l!t, the control w!ll hold out$ut $ower factor at th!s

leel !rres$ect!e of bus olta(e or freuenc,.3) Ut!lHra+$HloadHt!+e


efault 10 seconds

unct!on 7ets the no load to full load *F ra+$ t!+e. Ra+$ t!+es to base

loads less than 100 are $ro$ort!onal -&.e. t!+e fro+ no load to

50 load are 0.5 G Ut!lHra+$HloadHt!+e.

C) Ut!lHra+$HunloadHt!+e


efault 10 seconds

unct!on 7ets the full load to no load ra+$ t!+e. Ra+$ t!+es fro+ base

loads less than 100 are $ro$ort!onal -&.e. t!+e fro+ 50 load

to 0 load are 0.5 G Ut!lHra+$HunloadHt!+e.


?ase #oad peration



)he following steps are followed for ?ase #oad operationF

#onnect a #% $os!t!on s!(nal fro+ the ut!l!t, brea*er to the "##Ds UT&E&TJ "ARAEE?E

?NA%E? !n$ut.

The "## has a Eoad oern !n$ut that !s used for e@ternal *F load control b, a 6aster

#ontroller. &n %ase Eoad 6ode a$$l, 2C 9# to th!s !n$ut and set the des!red %ase Eoadset$o!nt !a the "##Ds front $anel.

7et $ower factor ra+$ load and unload set$o!nts !a "##Ds front $anel.

"ro!de a re+ote start s!(nal to the enset. the enset w!ll start and s,ncron!se w!th the

ut!l!t, su$$l, and close !tDs brea*er.

The "## w!ll ra+$ load fro+ 0 to the base load set$o!nt !n the $ro(ra++ed t!+e

-+a!nta!n!n( the $reset $ leel).

To unload the enset fro+ base load re+oe the Re+ote 7tart s!(nal. The "## w!ll ra+$fro+ %ase Eoad to 5 load -$er the unload ra+$ set$o!nt) and o$en the brea*er. The

enset w!ll then cooldown and shutdown.


?ase #oad peration




Import=E(port peration

The Eoad oern !n$ut nor+all, w!red for a constant 2C 9# for base load o$erat!on +a,

be used to allow *F control of the "## enset b, an 6aster #ontrol s,ste+. &n th!s

conf!(urat!on the 6aster #ontrol out$uts a ar!able 0;5.0 olt s!(nal to the Eoad oern

!n$ut of the "## enset.

The 6aster #ontrol -usuall, "E#;based) +ust !nclude all of the reu!red hardware and lo(!cto calculate and out$ut the *F load reference to the ensets -such as load sensors for the

ut!l!t, su$$l, and an !+$ort/e@$ort set$o!nt).

The Eoad oern !n$ut on the "## !s used b, the 6aster #ontrol to co++un!cate a

des!red *F load to the ensets. The "## enset <trac*s> the co++and s!(nal ar,!n( !tDs

load fro+ 0;100 accord!n( to the olta(e leel of the Eoad oern s!(nal.

The s!(nal +ust be <cond!t!oned> b, the 6aster #ontrol. &f the s!(nal chan(es

!nstantaneousl, the enset w!ll e@$er!ence load !nstab!l!t,. The load reference +ust bechan(ed (raduall, b, the 6aster #ontrol.





*amp nload

02 "02 002 02

0!"

!0

%!"

"!0

!"

)he attached figure shows the utility

load set analog voltage input versus k:

load govern reference produced by that

voltage!

)he k5'* load reference is determinedby the k: reference and the P+ level set

in the control!

5oltages between 0!" and !0 represent

a 02 k: reference! ' voltage of %!" or

greater $up to <% 5.C& represents 02

$or the standby rating of the set&!

)he k: *eference 2 for voltagesbetwen !0 and %!" are represented by

the e4uationF

k:2 J >!% ( $#oad 6et 5olts-&



%ased on the olta(e leel of the Eoad oern s!(nal the "## w!ll (o !nto 1 of 3 $oss!ble

states

& *amp #oad 6tate

&++ed!atel, u$on closure of the enset brea*er to the ut!l!t, su$$l, the olta(e on

the load set !n$ut !s sa+$led. &f the olta(e !s 1.0 olts the "## w!ll (o !nto RA6"

6O?. The load on the enset w!ll be ra+$ed fro+ 0 *F to the *F

coores$ond!n( to the load set !n$ut.The ra+$ t!+e w!ll be *F ref @ -Ut!lHRa+$HloadHT!+e/100)

<& *amp nload 6tate

Fhen the load set olta(e (oes below 0.5 olts the control w!ll ra+$ the enset

fro+ the current *F leel to 0 *F. The

The ra+$ t!+e w!ll be *F ref @ -Ut!lHRa+$HUnloadHT!+e/100)

>& )racking ode

Fhen the ra+$ load funct!on !s co+$lete the "## w!ll (oern at the *F leel

deter+!ned b, the analo( load set !n$ut -for all 9olts0.5). The +a@!+u+ load leel

!s deter+!ned b, the %ase Eoad 7ett!n( on the "## -&.e. !f %ase Eoad 7ett!n( !s

50 olta(es coores$ond!n( to a load 50 w!ll be !(nored.






Paralleling Connections for ?ase #oad

)o enable base load utility paralleling of

PCC Aensets, minimal interconnections

are re4uiredF

1) enset and ut!l!t, c!rcu!t brea*er $os!t!on

and enset #% o$en/close w!r!n(

2) %us olta(e sens!n( !a a %us "T

+odule

3) Re+ote start !n$ut fro+ 6aster

#ontroller




Paralleling Connections for I=E Control

)o enable import e(port utility

paralleling of PCC Aensets, the

following interconnections are re4uiredF

1) 7,ste+ s,nchron!ser connected across

ut!l!t, #% enabled fro+ 6aster w!th b!asout$ut connected to *F load share l!ne

!n$ut on all ensets.

2) *F "ower transducer for ut!l!t, su$$l,

connected to 6aster "E#. 6aster "E# to

ou$ut des!red *F leel to each "## -!a

load (oern !n$ut) to +a!nta!n ut!l!t, !+$ort

-or e@$ort) at des!red leel.




6tate Control .iagram

RU*

-*"

$i&e/'s

A*

read,/to/$oad

RA:PA

i%/s,%c A*"# %hi'it

-6itch 7 FF

"-4

84* "#

ge%/c'/c$osed

(A* ti$/c'/c$osed)

Ram! o%e

"

W*

-9P

ge%/c'/o!e%

P4* 84*

#R4AK4R

coo$do6% 9

e+!ired

"RA*K

8V

RA:P

Remote -tart

-6itch 7 *

(8e% i% AU9)

("# %hi'it

-6itch ma,

'e o% ; ser

discretio%)

Remote -tart

-6itch 7 *

8o& ram! com!$ete

8e%set st rated s!eed

9RA"K :4

RA:P

U*A to 0<

oad -et

=0.5V"

RA:P

U*A to 5<

Remote -tart

-6itch 7 FF

Remote -tart

-6itch 7 FF

W $oad at 5<

Documents

pcc new update rev3100 taken from salala.ppt