GEX 2000 thuyet minh kich tu

Hệ thống kích từ số GEX 2000 dùng cho nhà máy nhiệt điện, loại kích từ không chổi than. Miêu tả về khối chức năng, giá trị cài đặt, hướng dẫn sử dụng trong vận hành và sửa chữa ................................................................................................................................................................................................................................

GEX-2000 Generator Excitation Regulator

Technical documentation

1　 INTRODUCTION 1

2　 FUNCTION DESCRIPTION 1

2.1　 MAJOR LOOP 2

2.2 SYSTEM CONFIGURATION 2

2.3 RECTIFIER BRIDGE 2

2.4 DE-EXCITATION AND OVER-VOLTAGE CIRCUIT 4

2.4.1 Calculation and choice of de-excitation resistance 5

2.4.2 Rotor over-voltage protection 6

2.5 FIELD FLASHING CIRCUIT 6

2.6　 REGULATOR CONTROL UNIT 6

2.6.1　 Collection of analog quantities 6

2.6.2　 Switching value input and output 7

2.6.3　 Communication 7

2.6.4　 Human-computer interface 7

2.6.4.1　 Keyboard 8

2.6.4.2　 LED indicator light 8

2.6.4.3　 Home screen display 9

2.6.4.4　 Instructions of menu operation 10

2.6.4.5　 Display measurement 10

2.6.4.6　 Parameters menu 12

2.6.4.7　 Protect switching menu 14

2.6.4.8　 Input status menu 14

2.6.4.9　 Transmission test menu 15

2.6.4.10　 System test menu 16

2.6.4.11　 Fault remember menu 16

2.6.4.12　 Fault wave form menu 17

2.6.4.13　 Event recording menu 18

2.6.4.14　 Precision adjustment menu 18

2.6.4.15　 Unit parameter menu 18

2.6.4.16　 System setup menu 19

2.6.4.17　 Test option menu 20

2.6.4.18　 Other test menu 20

2.7　 POWER SUPPLY 21

3　 OPERATION 21

3.1　 INTRODUCTION OF OPERATION PANEL 21

3.2　 OPERATION METHOD 22

3.3　 INCREASE/DECREASE MAGNET OPERATION 23

3.4 SOFT START 24

3.5 SYSTEM VOLTAGE TRACKING 24

3.4　 NORMAL OPENING STEPS (LOCAL) 24

3.5　 NORMAL CLOSING OPERATION 25

3.9　 FAULT WARNING AND PROCESSING 25

4　 MAINTENANCE OF EQUIPMENT 26

4.1　 DAILY INSPECTION 26

4.2　 MAINTENANCE 26

5　 UPPER COMPUTER MONITORING 26

5.1　 INSTALLATION AND STARTUP 27

5.2　 CONNECTION TYPE 27

5.2.1　 Single channel 27

5.2.2　 Two-channel 27

5.3　 SYSTEM SETTING 27

5.4　 FUNCTIONS 28

6　 CENTRAL CONTROL DESIGN GUIDELINE 33

7　 TECHNICAL DESCRIPTION OF GEX-2000C/D MICROCOMPUTER EXCITATION REGULATOR 34

7.1　 UNIT FEATURES 34

7.1.1　 Main features 34

7.1.2　 Operation environment 36

7.2　 MAIN FUNCTIONS AND TECHNICAL CRITERIA 36

7.2.1　 Main functions 36

7.2.1.1　 Adjustment and control function 36

7.2.1.2　 Limit and protection function 36

7.2.1.3　 Other auxiliary functions 37

7.2.2　 Main technical criteria 38

7.2.2.1　 Analog-digit converter input parameter 38

7.2.2.2　 Volume of switching value input/output 38

7.2.2.3　 Output parameter 38

7.2.2.4　 Network interface 38

7.2.2.5　 Power supply parameter 38

7.2.2.6　 Criteria parameter 39

7.3　 PRINCIPAL INTRODUCTION 39

7.3.1　 Main Principal 39

7.3.2　 Single Board Principle 41

7.4 S I 44

1　 Introduction

As a p r o d u c t o f G E X s e r i e s o f B e i j i n g K e D i a n Y i H e n g E l e c t r i c P o w e r T e c h n o l o g y C o , L t d ,

G E X - 2 0 0 0C / D m i c r o - c o m p u t e r e x c i t a t i o n u n i t i s a p p l i e d i n s y n c h r o n o u s g e n e r a t o r s e x c i t a t i o n s y s t e m

It is designed with single cabinet, featured with compact structure, easy installation and perfect function,

appl i es t o hydro- power ge nerat i ng uni t s and t her mal pow er gener ati ng unit s The general cabi net si ze i s

De-Exc.Circuit Linear De-Excitation

Ud is the DC output voltage，U2 is the AC input phase-to-phase voltage．αis the controlled angle.is　the　controlled　angle.

Ud=1.35U2Cosαis the controlled angle

Excitation regulator adjust controlled angle αis the controlled angle continuously according to generator and busbar conditions

Three-phase fully-controlled rectifier bridge should be work under three operation conditions,according to

the different controlled ange αis the controlled angle

W h e n 0°<αis the controlled angle.< 9 0°,Ud is positive value ,the bridge is under rectifier operation U d 　 i s 　 p o s i t i v e 　 v a l u e 　 ,Ud is positive value ,the bridge is under rectifier operation t h e 　 b r i d g e 　 i s 　 u n d e r 　 r e c t i fi e r 　 o p e r a t i o nconditions,Ud is positive value ,the bridge is under rectifier operationand t energy s uppliedthe g o c eneratorf t i s omeo r rom he nput ides f ectifierbridge

W h e n 　 9 0°<αis the controlled angle.< 1 8 0°,Ud is positive value ,the bridge is under rectifier operation U d 　 i s 　 n e g a t i v e 　 v a l u e 　 ,Ud is positive value ,the bridge is under rectifier operation t h e 　 b r i d g e 　 i s 　 u n d e r 　 i n v e r t i o n 　 o p e r a t i o n

conditions.the　energy　of　generator　field winding discharge gradually

When αis the controlled angle.=90°，Ud is zero,there are no energy exchange between input and output sides of rectifier bridge

The following figure is the wave form with inductive load

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2.4 De-Excitation and Over-Voltage circuit

T h e D e - e x c t i a t i o n c i r c u i t i s c o m p o s e d o f f i e l d c u r r e n t b r e a k a n d l i n e a r - r e s i s t a n c e Inverse de-excitation is used for normal stop operation If there are some emergency accident, field-current

breaker trip immediately and the residue energy of rotor winding will be released by linear-resistance

The function of field-current breaker is breaking the rotor excitation current circuit and makeing sure that

residue energy of rotor winding transfer to de-excitation resistance

2.4.1 Calculation and choice of de-excitation resistance

The choice for de-excitation resistance value which refer to rotor winding reverse voltage generated duringthe course of de-excitation and the speed of de-excitation is very importance

The rotor winding voltage during the course of de-excitation calculated according to the following equation

I is the generator excitation current

The calculation equation for time constant of de-excitation:

De-excitation resistance value usually calculate as 2.5R , in consideration of the insulation of rotor f

winding when field-current breaker trip under 2 times force excitation In this case,the rotor windingvoltage is smaller than 60 percent of winding withstand voltage.the rated current of de-excitationresistance usually greater than 20 percent of rated excitation current

2.4.2 Rotor over-voltage protection

T h e n o n - l i n e a r r e s i s t a n c e c o n n e c t e d t o D C s i d e o f r e c t i f i e r b r i d g e i n p a r a l l e l i s u s e d f o r a b s o r b i n g t h e

excessive voltage produced by the following reasons:

 Over voltage in DC side of rectifier bridge caused by rapid de-excitation

 Over voltage caused by thunderstrike

 Over voltage caused by closing or opening generator circuit breaker asynchronously

 Over voltage caused by generator short-circuit、under excitation and so on

Setting rule for the action value of rotor over-voltage protection:

 Less than 75 percent of rotor winding test voltage

 Less than the most permit voltage of rectifier bridge

 Greater than 2.5 times peak voltage value of excitation transformer secondary side

2.5 Field flashing circuit

The field flashing power come from DC or AC plant power supply

Field flashing function have two operation mode, automation and manul

A b i n a r y o u t p u t s i n g a l w i l l b e s e n t o u t a u t o m a t i c a l l y a n d f i e l d f l a s h i n g c o n t r a c t c l o s e duntil s tatorv roltageu t 2 p ise o rp go 0 t ercentv wf eated r eneratorw erminal oltage hen xcitation egulator ork

as automation mode In case the stator voltage can not maintain at the point of 20 percent of rated terminal

voltage, a field flashing failure singnal will be sent

It is necessary that Pressing the button SB3 when the field flashing mode is manual.In this case, excitation

regulaor operate by manual mode

Notice:

A.Th e r e a r e n o a u t o m a t i c f i e l d f l a s h i n g s i n g a l , w h e n e x c i t a t i o n r e g u l a t o r o p e r a t e u n d e r m a n u a l m o d e

FCR.In this case, the button SB3 must be press

B.Excitation current set value is 5 percent of rated no-load excitation current under manual mode.In this

case,if the stator voltage can not hold, it is a suggestion that increasing the excitation current setting

value IFR to 15 percent of rated no-load excitation current

C.There is a risk that generator voltage and excitation current oscillate in a greater range after changing

excitation current setting value to 15 percent of rated no-load excitation current.At worst, generator

stator voltage could exceed allowable values

D.It is a suggestion that the manual field-flashing operation pressing the button SB3 is in service as a

backup choice for the above reasons B&C

2.6　 Regulator Control Unit

G E X - 2 0 0 0C e x c i t a t i o n r e g u l a t o r i s l o c a t e d i n s i d e r e g u l a t i n g c a b i n e t , i s d i v i d e d i n t o s i g n a l p r o c e s s i n g ,

c o n t r o l c o m p u t e r , s i g n a l o u t p u t , c o m m u n i c a t i o n a n d h u m a n - c o m p u t e r i n t e r f a c e By c o l l e c t i n g v a r i o u s

a n a l o g q u a n t i t i e s a n d s w i t c h i n g v a l u e i n f o r m a t i o n o f g e n e r a t o r u n i t , t h r o u g h C P U c o m p u t i n g a n d

processing, control silicon controlled rectifier bridge output, reach the purpose of excitation system control

2.6.1　 Collection of analog quantities

Stator current 5A (1A) 803:1,803:2,803:3 803:6,803:7,803,8

Synchronizing

Rotor voltage Actual value 807: 1, 807: 2

Rotor current Collect form current divider 807: 3, 807: 6

2.6.2　 Switching value input and output

Remote central controlled operating excitation unit signal input (common terminal 901: 9)

E x c i t i n g u n i t w o r k i n g c o n d i t i o n a n d a l e r t i n g s i g n a l o u t p u t ( c o m m o n t e r m i n a l 8 0 5 :1)

Channel A automatic

operation

805: 3 Constant reactive operation 805: 13

Channel A manual operation 805: 5 Constant Power Factor 805: 11

Alerting signal output（公共端公共端805：23）

driven negative supply inside and backlight and chip power-supply control circuit outside.

L C D i s f u n c t i o n e d m a i n l y o f h u m a n - c o m p u t e r i n t e r a c t i o n i n t e r f a c e , i n c l u d i n g m e a s u r e m e n t s h o w i n g ,

parameter adjusting, fault display, system setting, combination with keyboard and completion of the above

features There are 6 LED indicator lights and 10 keys

“ ”(enter)

Make s turec heo urrenta g t t perationn m e ndt o o he ext enu, nsuring heparameter modification In the initial interface, press “ ” and go

to the next main menu interface

“Q”(back) Exit the current operation and back to the previous menu, cancel the

parameter modification

“+”, “-” increasing and decreasing They can also be used for parameter modifying, correspond to figure

2.6.4.2　 LED indicator light

Automatic operation

indicator light Light on in automatic operation status

Manual operation indicator

light Light on in manual operation status

PSS operation indicator

Constant reactive operation

indicator light Light on in constant reactive operation status

Constant power factor

operation indicator light Light on in constant power factor operation status

Channel fault indicator

light

(Channel alerting indicator

light)

Light on and keep by itself in unit internal fault or protection movement

limitation status, light off after signal return2.6.4.3　 Home screen display

After s tarting,t unit a heutomaticallye i ntoh somenterst d creent s o o isplay s ahem ystem peration tatus nd ainmeasured data The corresponding measurement displaying is as follows, all variables are shown as actual

value (See chart)

Status display area:

Name Definition Name Definition

UG1 Three-phase average value of terminal voltage (line

IG1 Stator three-phase current average value Q Reactive power

angleIFD Exciting current of exciter COSΦ Power factor

UGR In automatic operation, terminal voltage PID adjust

current-sharingoperation status

Fi e l d s u p p r e s s i o n s w i t c h : w i t h o n s p e c i f i c d e s c r i p t i o n , f i e l d s u p p r e s s i o n s w i t c h i s c o n n e c t e d w i t h

normal close auxiliary contact; the status is shown as open or closed

Channel status: the operation status of regulator in the channel Three cases: operation, track and quit

Main switch: display the generator is parallel operation or no-load operation The main switch status

can be distinguished in accordance with parallel breaker open contact

submenus In menu operation, use “ ”, “ ”“ ”, “ ” to move cursor, press “ ” and go to the

corresponding sub-menu, press “Q” and exit home screen The main menu is as follows

2.6.4.5　 Display measurement

The menu displays the measured data and computed value on screen Displayed value as follows:

Measurement UG1: 　 　 　 KV I LA: 　 　 　 A UAB1: 　 　 　 KV I LB: 　 　 　 A UBC1: 　 　 　 KV P: 　 　 　 MW UCA1: 　 　 　 KV Q: 　 　 　 Mvar

I G: 　 　 　 KA Cos

I A: 　 　 　 KA F0: 　 　 　 Hz

I B: 　 　 　 KA F1: 　 　 　 Hz

I C: 　 　 　 KA ARF UG2: 　 　 　 KV URAN: 　 　 　 V UAB2: 　 　 　 KV UPSS: 　 　 　 V UBC2: 　 　 　 KV U5V: 　 　 　 V UCA2: 　 　 　 KV U12V: 　 　 　 V UFD: 　 　 　 V H0: 　 　 　 %

I FD: 　 　 　 A US: 　 　 　 KV

UG1 Measured PT three-phase line voltage average valueUAB1, UBC1, UCA1 Measured PT three-phase line voltage

IG Stator three-phase current average value

IA, IB, IC Three-phase stator current

Name Definition UG2 Instrument PT three-phase line voltage average valueUAB2, UBC2, UCA2 Instrument PT three-phase line voltage

UFD Exciting voltage of exciter (output voltage of

COSΦ Power factor, displayed three decimal places

F0 Generator terminal voltage frequency

impact when the signal is zero

H0 Rotor equivalent heat productivity percentage

2.6.4.6　 Parameters menu

In t hem main m enu,t c t pove phe “ ursor”, p opuppo arameter,assword,i p nressnputi assword umber n

cursor place by pressing “ ”, “ ”, press “ ”, “ ” to move the cursor

Password *　 *　 *　 *

After inputting the correct password, press “ ” and go to submenu of parameter

Move the cursor and select submenu by “ ”, “ ”“ ”, “ ”, press “ ” and go to submenu of

parameter, p “ ” a gainwress mhen t p odify v che iarameterf s p alue, n ursor s lashing, elect arameter umberplace needed modifying through “ ”, “ ”, modify parameter value using “ ”, “ ” (Circulatory

change from 0 to 9), then press “ ” and save modification, press “Q” back to the previous menu, and

give u m p odification,t d v i theo isplayedv The p arameteralues and m odificationss he etupriginal alue.creen

is as follow

Automatic PID parameter setup screen:

U E L　 Li miter

A: (0　 ,Ud is positive value ,the bridge is under rectifier operation 　 - 18Mvar　 ) B: (　 30MW　,Ud is positive value ,the bridge is under rectifier operation 　 0　 )

2.6.4.7　 Protect switching menu

The menu will display and set switching status of function switches

Use “ ”, “ ”“ ”, “ ” t os electm iodifyingPress “ ” t oetems.nteri m nto s odifyingp tatus, ress

“ ”, “ ” t oc hanges switchingt p “ tatus,” a gaint cheno completeress i m urrenta tem odification, tthe s amet t cime g bhe t tursorp mo Press “Q” t ogack o heo t acktreviousp o mhe aenu.reviousg enu nd ive

up modification

2.6.4.8　 Input status menu

It mainly display on-off of inputting quantities real-time status Pressing “ ”, “ ” can turn page

Pressing “Q” and go back to main menu

2.6.4.9　 Transmission test menu

In t hem main s enu,transmission t estielect tem,p “ ress”, p opups ubmenu,s o c electN b utput hannel o y

“ ”, “ ”“ ”, “ ”, press “ ”, move the cursor to “on/off”, press “ ”, “ ” and select

transmission s tatus,t p hen“ ” t osress tartt a est,t c ftertransmission s tatustest, hange“off” Press “Q”o

and go back to main menu See chart

2.6.4.10　 System test menu

In this interface, you can carry out step response test and display the chosen variable oscillogram Allshould be displayed as unit value in graphic Step value can be changed in range of ±20% The second itemneeded to be set is the keeping time of step signal, setting range can be from 0 to 15 seconds, the minimumresolution is 0.1 second, after choosing start menu, press “ ” and step value starts to output, now themenu shows finished and will start again until 20 seconds recording time If abnormal situations appear inthe test process, press “ ” immediately and step value will be cancelled, the menu shows start again.After test, select WAVE and press “ ”, then it will display recording value, keys “ ” and “ ” canchange the current recording value UG1, UG2, IG, UFD, IFD, ILA, ILB, P, Q, , UGREF and IFREF,totally 12 oscillograms Press “ ” again then will appear a cursor, corresponding point time and currentamplitude in the top right corner (unit value display) Press “ ”, “ ” and move left/right slowly, press

“ ” and move right quickly, press “ ” and move left quickly Press “Q” and exit menu step by step.This interface needs password for entry

2.6.4.11　 Fault remember menu

In fault remember menu, press “ ” and go to fault remember submenu The displayed parameter is asshown in the graphic, press “ ” and “ ” to change issue items, maximum 20 items, numbered from 1,

circularly display Press “Q” to go back to the main menu

FAULT　 WAVE WAVE:

2.6.4.13　 Event recording menu

2.6.4.14　 Precision adjustment menu

In the main menu, select precision adjustment item, press “ ”, password authentication, after inputting

f u n c t i o n, m o d i f i e s t h e d i f f e r e n c e b e t w e e n a c t u a l m e a s u r e d v a l u e a n d d i s p l a y e d v a l u e

Its window is as the chart showing Modify the reference constant value of Keyboard operation

UAB1: 　 　 0 998 UFD: 　 　 　 1 000 UBC1: 　 　 0 899 I FD: 　 　 　 1 030 UCA1: 　 　 0 995 URAN: 　 　 　 1 000

I A　 　 : 　 　 0 998 AD16: 　 　 　 1 000

I B　 　 : 　 　 0 968 I LB　 : 　 　 　 1 000

I C　 　 : 　 　 0 992 I LA　 : 　 　 　 1 000 UAB2: 　 　 0 998 U12V: 　 　 　 0 988 UBC2: 　 　 0 868 U5V　 : 　 　 　 0 976 UCA2: 　 　 0 908 P1　 : 　 　 　 0 978 USA　 : 　 　 1 000 Q1　 : 　 　 　 0 948 USB　 : 　 　 1 000 U1　 : 　 　 　 1 000 USC　 : 　 　 1 000 U2　 : 　 　 　 1 000

Adj ust　 Accuracy

2.6.4.15　 Unit parameter menu

In t hem main s enu,u p electi p nit“ ”, a fterparameter assingp tem,a asswordress s uthentication, ubmenu

is popup Operate in accordance with parameter setup

-Unit Rated Ug： 10.5 KVRated Ig： 1.24 KARated Ufd： 153 ARated Ifd： 5.57 ANo-load Ufd0： 50 VRated Ild： 5 AF_PWR Supply： 400 Hz2.6.4.16　 System setup menu

Data -In t h e m a i n m e n u , s e l e c t s y s t e m s e t u p m e n u , a f t e r p a s s i n g p a s s w o r d a u t h e n t i c a t i o n , s u b m e n u i s p o p u p

showing some important information of current unit See chart below:

Password setting Set users’ password, which has four digits, when change password, enter the new

one and press “enter”, then password is changed successfully

Mailing address

Us e d f o r 4 8 5 m a i l i n g a d d r e s s s e t t i n g , t h r e e d i g i t a l i n t e g e r , r a n g e i s 0 255; ensure the two channels of which one i s odd, the other one is even for t wo-

-channel system

Baud rate 1 Corresponding baud rate of RS232 communication

Optional value: 9600, 19200, 38400; unit: bpsBaud rate 2 Corresponding baud rate of CAN communication (no need of change, already set in

procedure inside)

Fault clear Clear fault record, select “Yes” in this menu, press “enter” and then the fault record

t o t h e p r e v i o u s m e n u , i f y o u w a n t t o g i v e u p d a t e c h a n g i n g , p r e s s

“Q” and the current system date will be shown

2.6.4.17　 Test option menu

In the main menu, select test option menu, press “ ”, after passing password authentication, enter

into submenu There are totally 6 submenus

Test Test Enable： Enable/ForbidTest Signal NUM： 0

Option -Test Type： With CMP/Without CMP/EndPSS Limitation Value： 5%

Test signal summing

point

Set place of test signal summing point

0 voltage set point1-8 spare

9-27 PSS transfer function summing point

Note: t fhis iunctionu o i P st sedt t snly e n mSS b sest,a he est ignal nabling ust e et sdisabled status in normal operation

Test type

Set test mode having compensation test, uncompensated test and finished status;

When test type is uncompensated, PSS output is zero, test PID characteristics;

When test type is compensation test, P of PSS output is zero, test signal join, testPSS+PID characteristics;

When test type is finished status, PSS works normally;

Note: i c n hangingt t f e estP oype, t mirst xitd SS,U bserve he easured isplaying PSSoutput, input PSS until UPSS stable output is close to zero

PSS limiting value Set the proportion of PSS output corresponding PID output, generally not more

than 10%

PSS input Set t hel imitingv o P i aluea w af w SSg nput,a r s rell s hen enerator ctive eaches ated

active proportion, input PSS

PSS exit Set the limiting value of PSS exit, as well as when generator active reaches rated

active proportion, quit PSS2.6.4.18　 Other test menu

The following screen appears after entering into the menu

Other

Test -COST CTR Angle Enable： Enable/ForbidCOST CTR Angle Set： 150

Constant controlled

angle output enable

In unloaded status of generator, change it to permit, controller output is constantcontrolled angle output This function is only used for test

Constant controlled

angle output

Se t c o n t r o l l e d a n g l e o f c o n s t a n t o u t p u t , r a n g e d f r o m t h e m a x i m u m c o n t r o l l e dangle to the minimum controlled angle

3　 Operation

Functions of each part from top to bottom, from left to right is as follows:

1PV Terminal voltage

meter Indicate the generator terminal voltage (stator voltage)2PV Field voltage meter Indicate generator rotor voltage

1PA Field current meter Indicate generator rotor current

H1 Alerting Excitation fault singal

HA/H2 FCB Close Close the field current breaker and Indicate closed position

TA/H3 FCB Open Break the field current breaker and Indicate opening position

SB1 EXC ON Excitation regulator start running after pressing the button

SB2 EXC OFF Excitation regulator stop running after pressing the button

QLA Field flashing The b uttonu f msed f orf wanuale rield olash hen xcitation egulator perate

by manual mode1QK Channel Select Select one of the two regulatrol as the master unit

In u nloadedo i peration, m ncrease/decreasec t i agnet orrespond o ncrease/

d e c r e a s e t e r m i n a l v o l t a g e ; i n p a r a l l e l o p e r a t i o n , i n c r e a s e / d e c r e a s emagnet correspond to increase/decrease reactive power

3QK Auto/Man M a k e t h e r e g u l a t o r w o r k i n m a n u a l ( c o n s t a n t c u r r e n t ) , a u t o m a t i c

(constant voltage)

No Name Function

4QK Mode Slect Make the regulator work in constant power factor or constant reactive

power through switchover

5QK Rem/Loc Select local operation or remote master control operation

Constant power factor operation is the additional adjustment method of automatic operation,

change the set voltage value under automatic operation method in accordance with certain

step size and frequency, and then adjust terminal voltage of generator, thus make sure the

g e n e r a t o r p o w e r f a c t o r u n c h a n g e d In c o n s t a n t p o w e r f a c t o r o p e r a t i o n , i n d i c a t o r l i g h t o f

automatic o aperationc p fnd o onstanto c owerp i o actora t s peration n ontroller anel s n t he ametime

Constant power operation must meet the following three conditions:

1 The generator operates in parallel, and active power and reactive power is 2% more than

rated value

as the adjustment target value

a u t o m a t i c o p e r a t i o n m e t h o d i n a c c o r d a n c e w i t h c e r t a i n s t e p s i z e a n d f r e q u e n c y , a n d t h e n

adjust t erminalv o g oltaget m sf tenerator,g r husp u ake ure he enerator eactive ower nchanged

In r e a c t i v e p o w e r o p e r a t i o n , i n d i c a t o r l i g h t o f a u t o m a t i c o p e r a t i o n a n d c o n s t a n t r e a c t i v e

power factor operation on controller panel is on at the same time

Constant reactive power operation must meet the following three conditions:

1 The generator operates in parallel

2 The generator operates in automatic operation method

3 Method selecting switch is located in constant reactive power factor input place

The above four operation methods can be interruptedly switched in operation, it’s notable that procedure

control manual tracking has 30 seconds delay, so when switch to manual operation from any methods, pay

attention that switch 30 seconds after operation parameter changing No need of delay when switch from

manual operation to other methods

Channel switchover

The t a lternateswo c tandbye hannelsd t CAN-BUS, t husrxchange ealizemata t hroughutuali o racking, n rder

to prevent faul t tracking delay, so the tracking of standby channel for operation channel has 30 seconds

delay, and there is 30 seconds delay before channel switchover

3.3　 Increase/decrease magnet operation

Excitation o mperationm c odelv o ainly f r ompletev U ariouss a i perations or eference oltage GR, uch s ncrease

and decrease excitation, increase and decrease antiseize processing of excitation relay point, the maximum

and minimum limited location of reference voltage, and increase and decrease excitation automatically or

shut a utomaticallyi p a l n rotectingm s t ndr imitingv f z ovement,a f tep est, aising oltage rom ero, utomatic ield

s u p p r e s s i o n a n d o t h e r f u n c t i o n s e t c c a n b e r e a l i z e d b y d i r e c t l y c h a n g i n g r e f e r e n c e v o l t a g e v a l u e

Because microcomputer excitation is generally digital set, reference voltage is only a variable of internal

s t o r ag e, t h e o pe r a t or ca n c h an ge i t ex t er n al l y, i n ad di t i on, t h e co m pu t er i ns i d e ca n a l s o ch an ge U G R a s

needed, t t rhus heo e ealizationo f f ixcitationq simple a ndr perationeliable,w i o ounctionshicht s nes uitef he

advantages of microcomputer excitation

Th e a d j u s t m e n t o f v o l t a g e s e t v a l u e U G R i s c a r r i e d o u t t h r o u g h r e a d i n g c l o s i n g c o n d i t i o n s o f

i ncr ease/ decre ase exci tat i on node by comput er , t he longer node cl osi ng t ime i s, the mor e UGR adjus ted

measure is Excitation operation can be realized by operating “increase”, ”decrease” button of GEX-2000

control panel-respectively increase/decrease corresponding UGR, and so on

3.3.1　 Anti-adhesive function of increase/decrease excitation node

Th e f u n c t i o n i s o n l y e f f e c t i v e u n d e r a u t o m a t i o n m o d e a n d c o u l d e n a b l e o r c a n c e l i n t h e m e n u

＂Function on＂

Notice:

The f unction“system v toltage ” i sp rackingriort “soft so ”,so dtart isable“system v toltage ” f irstlyirackingn

menu before using “soft start”

3.5 system voltage tracking

“system voltage tracking ” make the terminal voltage rapidly rise closed to system voltage after making

enabled and measuring system side voltage

Notice:

D i s a b l e t h i s f u n c t i o n , i f s y s t e m v o l t a g e d o n’t p i c k u p b y e x c i t a t i o n r e g u l a t o r , i f n o t s o ,g e n e r a t o r v o l t a g e

couldn’t build up

3.4　 Normal opening steps (local)

Check the following components are in proper place:

 AC breaker 1QF is in open position,field-current breaker MK is in open position and green lamp

 Switch 3QK“Auto/Man”is in auto position;

 Select “local” of “local/master” switch 5QK;

The generator reaches rated speed 3000 r/min; having raising voltage condition, start to raise voltage:

1) Close AC breaker 1QF;

2) Press button HA, the red indicator light is on at the same time;

3) Press button SB1,regulator is running and generator terminal voltage rise up

4) When the terminal voltage is stabilized in setting voltage by soft start, increase voltage to

rated terminal voltage nearby through “increase/decrease” switch 2QK;

“inc reas e/decr ease” butt on 2QK if the vol t age c an not mai ntai n, incr ease manua l set val ue by

increase button 2QK then press “field flashing” button SB3;