MAY 2018 - Amtech Electronicsadmin.amtechelectronics.com/members/3/brochure/May_2018_NEW… · MAY...
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MAY 2018 Automation Training Calendar Piyush Patel (Managing Director) Techno-Talk Energy saving in boiler ID fan Amtech Power Vision The team-work in a clock The three hands of a clock: All move in the same direction. All are required to show the time precisely. All must move accurately to show the correct time. The legwork done by one is different from the other two, but no one complains. The time decides who is to lead, they do not have the choice. They have different sizes and shapes but the goal is the same. Influence of Harmonics With Reference to the Order Motor Control Customer’s Voice Balrampur Chini Mills Limited Become a ‘strong support’ for others, and you will become so strong that you will not need to have a support Case study Generation of control and monitoring system Happy World Red Cross Day We pay our tribute to s : 1. abindranath agore R T 2. haramveer ambhaji D S 3. watantryaveer avarkar S S 4. hilya olkar A H on their irth nniversar in this month. B A ies
Transcript of MAY 2018 - Amtech Electronicsadmin.amtechelectronics.com/members/3/brochure/May_2018_NEW… · MAY...
MAY 2018
Automation
Training Calendar
Piyush Patel (Managing Director)
Techno-Talk
Energy savingin boiler ID fan
Amtech Power Vision
The team-work in a clockThe three hands of a clock:All move in the same direction.All are required to show the time precisely.All must move accurately to show the correct time.
The legwork done by one is different from the other two, but noone complains.The time decides who is to lead, they do not have the choice.They have different sizes and shapes but the goal is the same.
Influence of HarmonicsWith Reference to the Order
Motor Control
Customer’s Voice
Balrampur ChiniMills Limited
Become a‘strong support’for others, and
you willbecome so
strong that you willnot need to have
a support
Case study
Generation of controland monitoring system
Happy
World
Red
Cross
Day
We pay our tribute tos :
1. abindranath agoreR T
2. haramveer ambhajiD S
3. watantryaveer avarkarS S
4. hilya olkarA H
on their irth nniversar in this month.B A ies
TRAINING CALENDAR
2018
2018
2018
2018
2018
2018
2018
2018
2018
2019
2019
2019
19-20
22-23
25-26
26-27
22-23
24-25
24-25
21-22
24-25
23-24
22-23
22-23
3
TECHNO-TALK
Current armonics are generated due to non-linear loads, i.e. the loads which draw non-sinusoidal currents fromha sinusoidal voltage source. Current harmonics lead to voltage harmonics due to finite source impedance.
Harmonics are multiples of fundamental frequency, such as 2 , 3 , 4 , 5 etc. This is called order of harmonics.nd rd th th
DC value in AC is called as sub-harmonic at zero frequency. Normally in a three-phase system even harmonicsare not generated due to waveform symmetry. Hence we will consider only DC and odd harmonics in this topic.
Influence of DC inAC or sub-harmonic at zero frequency:
The DC in AC is generated due to unequal firing of diodes or thyristors connected to positive and negative of DClink in converters. DC component inAC leads to:
1. Saturation of transformers, thus increasing magnetic losses.
2. When anAC voltage containing DC component is applied toAC motor, it leads to more starting current.
3. DC component leads to braking torque, which needs to be overcome while motor is running. Hence it
increases motor losses in running conditions.
Influence of triplen armonics:h
The harmonics which are multiples of third harmonic such as 3rd, 9th, 15th, 21st (as only odd harmonics areconsidered) are known as triplen harmonics. They generate zero sequence currents.
In a three phase four wire system the neutral cable carries only the unbalance part of three phase currents, asthe balanced part adds to zero. But when the frequency of currents is three or multiple of three times thefundamental frequency, such currents add in neutral. Thus neutral may get overloaded and can burn eventuallydue to overheating.
Influence of 5 , 11 , 17 , 23 etc armonics:th th th rd
h
These are also (6N - 1) harmonics. Apart from the other effects such as proximity effect, skin effect etc. commonto all harmonics, these harmonics generate negative sequence torque. Hence if the motor is running in forwarddirection, these harmonics will try to rotate the motor in reverse direction. Thus they will create additional losses.They will also result in pulsating torques especially at lower speeds.
Influence of 7 , 13 , 19 , 25 etc armonics:th th th th
h
These are also (6N +1) harmonics. Apart from the other effects such as proximity effect, skin effect etc. commonto all harmonics, these harmonics generate positive sequence torque. Hence if the motor is running in reversedirection, these harmonics will try to rotate the motor in forward direction. Thus they will create additional losses.They will also result in pulsating torques especially at lower speeds.
Higher Order harmonics are more harmful than lower order ones due to pronounced eddy current losses,hysteresis losses, copper losses (due to skin effect). They also have more proximity effects.
They lead to more RFI and EMI related problems.
Lower Order harmonics though less harmful than higher order harmonics – are not preferred as they are moredifficult to filter than higher order harmonics.
TITLE: INFLUENCE OF HARMONICS WITH REFERENCE TO THE ORDER
DOC. NO. CS-265TITLE: ENERGY SAVING IN BOILER ID FAN
Payback Period Approximately = 3-4 Months
Industry : Sugar
Application : Boiler ID Fan
Motor rating : AC Induction Motor, 3 Phase-
132kW :
415V :olt
1483RPM :
50Hz :
225A :mp
Previous system : Motor was running on star delta starter.
Problem observed : 1) High maintenance cost.
2) Energy losses due to flow control by damper.
Present system : 132 kWA E .xpert- azy Variable Frequency Drive used
kW (Consumption) Damper Position
Previous system
(Without drive) : 104 kW 85 to 88 % Open
Present system
(With drive) : 74 kW 100 % Open
System block diagram :
Merits of new system : and s o1. Easy mooth peration.
s Variable Frequency Drive.2. Energy aving due to flow control by
Economical analysis :
�Energy consumption without VFD- P1 = 104 kW
�Energy consumption with VFD - P2 = 74 kW
�Energy aving er ay ((P1-P2) 24) = 720 Unitss p d x
�Saving er ay @ Rs. 6/- Unit = Rs 4320/-p d .
�Saving er ear (Approx. 150 ays) = Rs 6,48,000/-p y d .
132 kW, 3-PHASEINDUCTION MOTOR
AXPERT-EAZY
3-PHASE,
415 V,
AC SUPPLY
132 kWBOILER ID FAN
FROM AMTECH POWER
5
CASE STUDY
Customer : Saraswati Sugar Mills Limited
Application : Steam Turbine
Generator rating:
• BHEL and KirloskarMake :
• 5 X 3 MWPower :
• 420 V ACRated Voltage :
• 5155 ARated Current :
• 140 V DCExcitation Full Load Voltage :
• 4.7 A DCExcitation Full Load Current :
Figure 1: Old BHEL Make Rheostat type excitation system
Figure 2: New Amtech Make DECS 250 Excitation System with Load sharing module
Problems with old excitation system:
• Poor control accuracy
• No operation inAuto mode
• No proper load sharing
• Fault analysis option is not available
• No monitoring system
Advantages with new digital excitation system:
• 0.25 % voltage control accuracy+
• Fully digital system
• Sequence of event recording available for faultanalysis
• Major protection are integrated in Excitation ystemS
•Automatic load sharing system
• Monitoring all power parameter on front screen
Old excitation system was BHEL make rheostat excitation systems shown in figure-1.Today, high maintenancecosts and no availability of parts have made it difficult for owners to keep older equipment in operation. Thecustomer has lot of problems during all machines running in parallel operation. Amtech proposed completelatest technology digital excitation with load management control system. Amtech replaced old system with newsystem and successfully installed and commissioned. Today customer is very happy with new system, ll theamachines running with very smooth operation in any transient condition and active / reactive load sharedbetween all machines equally.
The major technical features of new excitationsystem are as follows:
• Microprocessor based design
• 0.25 % Voltage accuracy
• True RMS sensing, single or three phase
• Full generator parameter metering capabilities
• Auto tuning feature with two PID stability groups
Operation mode:
• AVR mode
• FCR (Manual) mode
• Droop mode
• PF / VAR Mode
Protections & limiters:
• Generator overvoltage
• Generator undervoltage
• Field overvoltage
• Field overcurrent
• Loss of sensing
• Loss of PMG
• Loss of field
• Reverse power
• Overexcitation limiter
• Underexcitation limiter
• Stator current limiter
TITLE: of BHEL make analog excitation system with new mtech make igitalUp gradation A DE Sxcitation ystem along with load management control.
Old BHEL Make Rheostat type excitation system:
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PRODUCT OVERVIEW
The new generation of control and monitoring system, developed by Amtech, integrates the operationof Sugar plant Boiler Automation using variable frequency drive, instrumentation and Automationsystem for controlling and monitoring.
Automation system, designed to improve throughput, gain in performance and efficiency of co-gen power plantin sugar mill. Load Balancing Algorithm facilitates, ontinuous aintained team eneration and niform teamc m s g u sf e c c i elow. Draft Fan Speed Algorithm facilitates, xcellent ombustion onditions hence ncreased fficiency thuso b c u r c f s f r fptimum oiler apacity tilization and educed arbon ootprint. Increased team to uel atio hence uel saving.Reduced hermal hocks hence onger ife xpectancy.t s l l e
Loops of Boiler Automation:
�De Aerator level and pressure control
�Three element control with drum pressure
compensation
�Combustion control
�Load Balancing of two or more boilers
�Soot Blower controls
�Fuel and Ash Handling control
�Cooling Tower control
�DM Plant control
�Hotwell control
�Steam and water analytical system
�Continuous Blowdown level control
�Intermediate Blowdown level control
Benefits:
�Assistance from concept to commissioning
�Improved fficiencye
�Improved team to uel atio due to increase in FWs f r
� b e fTemperature and increase in oiler fficiency (see uelr eatio quation)
�Optimum ombustion educes n-burnt uel ossesc r u f l
d o iThis is evident from ecrease in xygen and ncreasec d p f gin arbon ioxide ercentage in lue as and at the
e a psame time reduction in xcess ir ercentage,r f g c m peduction in lue as arbon onoxide ercentage
�Reduction in xcess ir means optimum usage of ane a f
d p srives and thus ower aving
�Maintained team rum evel with ressures d l p
e o s g c s s d lCompensation nsures ptimum team eneration while ompensating for hrink and well in the rum evel
�Reduction in linker ormation due to good combustion conditionc f
�Reduces hermal hocks and mproves ife xpectancyt s i l e
�Minimized maintenance reduces the cost and provides more up time
�Easy troubleshooting
�Quick and safe commissioning
�Qualified after-sales service
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Regional Offices
Contact Person Phone No. (O) Mobile No. E-mail
022-28846083Vrajesh Yadav 09819900501
09108051977
09825042458
Mumbai
Bangalore
Chennai
Delhi
T. S. Sridhar 09840618533 09940229955
.
Umesh Bhatia 09589344318Indore / Raipur [email protected]
H.O. and Service Center
Contact Person Phone No. (O) Mobile No. E-mail
Shailesh Patel 09879208780H.O. Gandhinagar [email protected]
Rajesh Moradiya 09909973780Amtech Service CenterGandhinagar
G. Sateesh Kumar 09573900222Hyderabad [email protected]
Kaushik C. 09932820680Kolkata [email protected]
09825042458
09589344318
09573900222
09932820680
09108051977
Pankaj Gulati 09888748620Chandigarh [email protected]
