03 Generator Selection Tool - GENSIZE Bob Patrick Oct08 Form) [Compatibility Mode]

Cummins Power Generation

P T i i M d l 7Power Training Module 7

Generator Sizing

Bob PatrickOctober 2008

Sizing the Genset for Motors….

Two Factors – must have1 Available additional engine torque to support both1. Available additional engine torque to support both

the existing load plus accelerate the motor up to full speed within the spec limits.p p(Acceleration Torque = advised Nm x rpm x 2π/60 = watts)

2 Alt t bilit t th t i h2. Alternator capability to overcome the motor inrush and sustain the voltage within the spec limits.

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DOL Starters

REN

T

600Current

Power Factor

Direct On-Line (DOL) Start

High Locked Rotor Current (kVA) POW

ER

, CU

RR

1.0

R (L

AG

GIN

G)

g ( )

Shown for 100% Rated VoltageN

T TO

RQ

UE,

P

OW

ER F

ACTO

R

Starting PF 0.2 to 0.4 for 3 Ø Motors

Higher Starting Requirements

PER

CEN

100 0.2

PO

Motor Torque

3

g g q

PERCENT MOTOR RATED SPEED20 40 60 80 100

Load Torque0

Star-delta Starting…Typical kW demand of motor…

Reduced Starting ImpactReduced Starting Impact

Watch out for the transition (kVA)

Potential start failure if alternator cannot sustain voltage in transition. Typical kVA demand of motor…ca ot susta o tage t a s t o

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Soft Starting…

Motor Response for Soft Starter

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Regenerative Load

Reverse power needs to be considered.

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Regenerative LoadStage 1:-Stage 1:Genset Supplies Site Loads

Stage 2:-Lift M t P dLift Motor Produces Reverse Power 200kW

100kW Load Bank Removes Risk of Reverse Power

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Transients

Step Loading the Generator

•Apply Load in Increments

•Apply Large Motor Loads First

•Limit Voltage and Frequency dip

•Ultimately reduce genset size

Step Starting Sequence

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Step Starting Sequence

ISO 8528 - 5

ISO 8528 ifi d i d fISO 8528 specifies design and performance criteria of Reciprocating Internal Combustion (RIC) engine and an Alternating Current (AC)(RIC) engine and an Alternating Current (AC) generator when operating as a unit.

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Voltage Transients….ISO 8528-5 Transient Requirements

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Frequency Transients….ISO 8528-5 Transient Requirements

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Transients….ISO 8528-5 Performance Classes

Class G1

This applies to generating set applications where the connected loads are such that only basic parameters of voltage and frequency need to be specifiedvoltage and frequency need to be specified.

EXAMPLE General-purpose applications (lighting and other simple electrical loads)simple electrical loads).

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Class G2

This applies to generating set applications where its voltage characteristics are very similar to those for the commercial public utility electrical power system with which it operatespublic utility electrical power system with which it operates. When load changes occur, there may be temporary but acceptable deviations of voltage and frequency.

EXAMPLE Lighting systems, pumps, fans and hoists.

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An example of Class G2 voltage and frequency requirements:

Transient Frequency Dip </= 10%Frequency Recovery Time </= 5 SecsSteady State Voltage Deviation </= +/- 2.5%Transient Voltage Dip </= 20%Voltage Recovery Time </= 6 Secs

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Class G3

This applies to applications where the connected equipment makes severe demands on the stability and level of the frequency voltage and waveform characteristics of thefrequency, voltage and waveform characteristics of the electrical power supplied by the generating set.

EXAMPLE Telecommunications and thyristor-controlledEXAMPLE Telecommunications and thyristor-controlled loads. It should be remembered that both rectifier and thyristor-controlled loads may need special consideration with respect to their effect on generator-voltage waveform.

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p g g


Class G4

This applies to applications where the demands made on the stability and level of the frequency, voltage and waveform characteristics of the electrical power supplied by thecharacteristics of the electrical power supplied by the generating set are exceptionally severe.

EXAMPLE Data-processing equipment or computer systemsEXAMPLE Data-processing equipment or computer systems.

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Voltage Transients….

L k d R t C f

Locked Rotor Curve

Locked Rotor Curve for1400kVA alternator

Used to aid sizingg

Approx 14% dip at1000kVA (depends onvoltage)voltage)

Allow 0.5% Volts Dip forevery 1% Freq Dip

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Sizing….

Can be very simple – a simple addition with diversity, etc., or...y, ,More complex when considering difficult loads and load step sequencing.

Difficult loads: Electric motors, UPS, Lighting, Medical equipment

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Medical equipment

Power SuiteCummins Power Suite.lnk

Cummins Sizing Tool Gensize (To calculate your generator requirements)generator requirements)

Has a database using CPG product test dataHas a database using CPG product test data

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Power Suite Demonstration

Any Questions before we move onAny Questions before we move on

Bob Patrick

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GenSize™ UpdatePSG/P l TPSG/Proposals Team

Part IIb – Training….

Bob PatrickO t b 2008October 2008

Installing Power Suite Central UpdateInstall Power Suite 4.0 From CD

Auto update from central database,http://www.cumminspower.com/na/technical/powersuite/webcenter/

Central database replaces

PC running Power Suite V4 0

original database

Power Suite Central Library

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PC running Power Suite V4.0y& Update CD

Updates Via Internet

Auto-updates from central database,p ,http://www.cumminspower.com/na/technical/powersuite/webcenter/

Select: Updated files for Europe, Middle East and Africa.

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Updates Via InternetAuto Updates –GenSize™ for MSWindows

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Cummins Power Suite

Opening Screen: Create New Project

With Project highlightedClick on “Open”

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• The opening screen allows import previous or create new project

G i M i S S tti U Gensize Main Screen: Setting Up Project Parameters

Current Project ParametersCurrent Project Parameters

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• Expand New Project in left column

Gensize Main Screen: Setting Up Project Parameters

Shows current loadsand steps available

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G i M i S S tti U Gensize Main Screen: Setting Up Project Parameters

Click on “EditClick on Edit Project”

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• Once expanded right click on project and select “Edit Project”

Gensize Main Screen: Setting Up Gensize Main Screen: Setting Up Project Parameters

Select Parameters tab

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• Project parameters box will appear


Current Project Parameters

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• Set the required project parameters


Once complete, click “OK” to continue

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Gensize Main Screen: Creating Loads

Add lighting load by clicking

th b lbon the bulb

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• Select load type from toolbar


Enter 100kW lighting loadg g

Click “Next” for more options

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• Example shows 3 phase 100 kW fluorescent lights


Shows requirements for 100kW light load

Click “Finish” to complete load

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• Review Load Requirements


Light load nowLight load now created

Whilst highlighted, the light load

tparameters appear

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• Lighting load appears in left pane


Light Load can now be dragged in to step 1gg p

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• Apply load to desired load step


Project can now be sized by clicking the

“Size Project ”

Step 1 showing Light Load

jbutton

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• Minimum Requirements For Sizing Project

Gensize Main Screen: Sizing ProjectGensize Main Screen: Sizing Project

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• Gensize calculating project requirements to find match

Reports: Recommended Generator Model

RecommendedModel

Project parameters Performance Vs Requirements

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R t R d d G t Reports: Recommended Generator Model

RecommendedModelModel

L d tPerformance Vs

Load parameters Requirements

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RecommendedModel

G t C fiPerformance Vs

Model

Generator Config Requirements

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Click for full genset report

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• Changing the report type


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• Printable Genset Report


Close Report

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Switch to Table View

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Reports: Recommended Generator Reports: Recommended Generator Model

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• Table View Used For Cross Referencing Models


Switch to library

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y

Central Library CD

Exit Library toExit Library to return Gensize

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• Shows recommended model and technical data

Gensize Main Screen: Adding Load Steps

To add single load step click here

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• Extra load steps can be added at any time

Gensize Main Screen: Adding Load Stepsp

Second Load Stepp

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G i M i S Addi L d Gensize Main Screen: Adding Load Steps

You can define the number of steps

required

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• There are 2 ways to add extra load steps


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• Specify number of required load steps


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• New loads can then be added to each step


Here we will add 400HP motor400HP motor

Cli k “N t” fClick “Next” for more options

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• New loads can then be added to each step


Click “Finish”

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G SGensize Main Screen: Adding Load Steps

New motor load added

Motor load dragged to ggStep 2

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• Adding the new load to Step 2

G SGensize Main Screen: Adding Load Steps

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• Sized generator with 2 load steps

G i M i S Ch Gensize Main Screen: Change Quantity

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• Quantities of each load can be changed

Gensize Main Screen: Change Quantity

Quantity changes to 2y g

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• Quantities of each load can be changed

G i M i S S i Gensize Main Screen: Saving Projects

Project can be saved at any time using

the File menu

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G i M i S S i Gensize Main Screen: Saving Projects

File Name

Directory

File Name

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• Default projects directory

Gensize Main Screen: Saving Projects

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• Check for confirmation before closing!

Workshop

Lighting LoadsGeneral LoadsGeneral LoadsUPS LoadsMotor LoadsMotor LoadsRound-Up

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LIGHTING LOADS

Power input

Lighting requirement

Type of load

Requirement for generator

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LIGHTING LOADS

Power factor requirements

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GENERAL LOADS

Power inputs

PowerPower requirements


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GENERAL LOADS

Both Start and run power factors must be entered

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UPS LOAD

UPS Output power

UPS requirement

UPS type


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UPS LOAD

UPS characteristics hi h i i lwhich are crittical.

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MOTOR LOADS

Motor shaft power

Motor requirement

Motor type


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MOTOR LOADS

Motor starting type

Motor starting characteristics

Motor r nningMotor running characteristics

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Thank you for your time

Any Questions

Bob Patrick

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03 Generator Selection Tool - GENSIZE Bob Patrick Oct08 Form) [Compatibility Mode]

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Transcript of 03 Generator Selection Tool - GENSIZE Bob Patrick Oct08 Form) [Compatibility Mode]