Madison Gas & Electric 10-Q 2006 Q3 Quarterly report

MG&E Turbine Supply Agreement, Exhibit D.1.1

Exhibit D.1.1

General Specification

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG & E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

 

MG&E Turbine Supply Agreement, Exhibit D.1.1

SF#1091364

MG&E Turbine Supply Agreement, Exhibit D.1.2

Exhibit D.1.2

Wind Turbine Single Line Diagram

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

 

MG&E Turbine Supply Agreement, Exhibit D.1.2

SF# 1091367

MG&E Turbine Supply Agreement, Exhibit D.1.3

Exhibit D.1.3

Electrical Data

SF# 1091471

 

MG&E Turbine Supply Agreement, Exhibit D.1.3

SF# 1091471

 

MG&E Turbine Supply Agreement, Exhibit D.1.3

SF# 1091471

 

MG&E Turbine Supply Agreement, Exhibit D.1.3

SF# 1091471

 

MG&E Turbine Supply Agreement, Exhibit D.1.3

SF# 1091471

 

MG&E Turbine Supply Agreement, Exhibit D.1.3

SF# 1091471

 

MG&E Turbine Supply Agreement, Exhibit D.1.3

SF# 1091471

MG&E Turbine Supply Agreement, Exhibit D.1.4

Exhibit D.1.4

LVRT Option

SF# 1091472

  

MG&E Turbine Supply Agreement, Exhibit D.1.4

Vestas Americas

16 February 2005

Vestas Americas

111 SW Columbia St.

Suite 480

Portland, OR 97201, USA

+1 503 327 2000

Vestas V82-1650kW wind turbine UPS for Fault Ride-

Through option

General Description

Th

e UPS (Uninterruptible Power Supply) in the Vestas V82-1650kW wind turbine

is provided as part of the optional Fault Ride-Through (FRT) pack(e.2  In FRT-

.u2ipped turbines, the volt(e2 trip settiÊs2 are 4pa2nded to those shown in

attached the curve “NM72 & NM82 (1.5/1.65MW) Turbine Voltage settiÊs2 /

Volt(e2 Fault Ride Through”.

Forg2rid disturbances within the raÊe2 shown in the attached curve, the UPS

maintains power to critical turbine systems, such as relays and microprocessors.

Th

is allows the turbine to stay online and return to normal operation after the

disturbance has cleared.

Th

e UPS solution is built into a 19” standard rack system with separate battery

unitsf2or ease of maintenance.  The UPS communicates any alarms with the

Wind Turbine controller. ™2 maintenance is required, the UPS can be safely

bypassed without interruptiÊ2 turbine operation

SF# 1091472

                                   

MG&E Turbine Supply Agreement, Exhibit D.1.4

Vestas Americas

16 February 2005

Vestas Americas

111 SW Columbia St.

Suite 480

Portland, OR 97201, USA

+1 503 327 2000

UPS technical information

·

Parallel redundant battery units

·

Various alarm outputs available

·

Du2ree 2 protection:IP524

·

CE certified andf2ound in compliance with the following standards:

o

The

 LVD-directive (Low Voltage Directive) (73/23/EEC) with later changes

o

Electrom(2netic compatibility EMC directive (89/336/EEC) with later changes

o

EN 60439-1 Type-tested and partially type tested assemblies.

o

EN 50091-1-2 Uninterruptible power systems (UPS) -- Part 1-2: General and

safety r.2uirements for UPS used in restricted access locations

o

EN 50091-2 Uninterruptible power systems (UPS) – Part 2: EMC requirements

Technical Specifications

Min.

Typ.

Max.

Unit.

Output supplyvo2lt(2e AC

160

30

[VAC]

I

nput supplyvo2lt(2e AC

30

65

[VAC]

Supply current AC

6

[AAC]

Output power

4500

[VA]

Relative humidity

0

90

[%]

Temperature raÊ2e

-3

0

40

[°C]

M

echanical data

600x2 600x2 2200

mm]

Wx2 Hx2 D

Fault Ride Through Curve Attached

SF# 1091472

           &nbs p;                                               

MG&E Turbine Supply Agreement, Exhibit D.1.4

Document no.: NM82 NM72 FRT Voltage settings verC.doc

Rev.: C

Date: 2004.01.06

Init: BAN

SF# 1091472

MG&E Turbine Supply Agreement, Exhibit D.1.5

Exhibit D.1.5

Low Temperature Package

SF# 1107117

                                                                   

MG&E Turbine Supply Agreement, Exhibit D.1.5

DOCUMENT NO.: C72/82-0124

NM72/82 Arctic Specification

PAGE 1/6

NM72/82 Arctic Specification

This document describes the solutions chosen for operating the NM72/82 in extreme cold weather

conditions.

Name:

Date:

Signature:

Written by:

Ellen Hyldgaard

07.05.2003 EOL

Thomsen

Checked by:

Steen Kirkegaard Jensen

SKJ

Filename:

Property of NEG Micon A/S. This document must not be passed on to any person, nor be copied or made use

of without approval from NEG Micon A/S.

SF# 1107117

MG&E Turbine Supply Agreement, Exhibit D.1.5

DOCUMENT NO.: C72/82-0124

NM72/82 Arctic Specification

PAGE 2/6

Document revisions

Revision:

Date:

Changed by:

Changed page:

Description of change:

Doc. Name changed, details added,

1 02.03.04  SKJ All

wording changed

Contents

Contents ...................................................................................................................................2

1 Arctic specification turbines................................................................................................3

2 Strategy for operating in cold weather conditions ............................................................3

3 Arctic equipment and component specific details ............................................................3

3.1 Nacelle heating.................................................................................................................3

3.2 Gearbox............................................................................................................................4

3.3 Cooling system .................................................................................................................5

3.4 Meteorological equipment.................................................................................................5

3.5 Rotor.................................................................................................................................6

3.6 Controller ..........................................................................................................................6

3.7 Structural parts .................................................................................................................6

SF# 1107117

MG&E Turbine Supply Agreement, Exhibit D.1.5

DOCUMENT NO.: C72/82-0124

NM72/82 Arctic Specification

PAGE 3/6

1 Arctic specification turbines

For use in areas with extremely low temperatures, the Arctic specification for NM72/82 has been

developed.

The limitations are to operate at temperatures down to

÷

30

°

C AT (Ambient Temperature) and structural

endurance down to

÷

40

°

C at stand still.

In general, all steel, welds, casts and cables are specified to meet above requirements. Further, all

components, lubrication and hydraulic oil are selected to meet the cold conditions keeping required

properties.

Some components are specifically selected to replace normal equipment, and special heating systems are

added. The following is a description of the items where the arctic version of the NM72/82 Arctic

differs from the standard version.

2 Strategy for operating in cold weather conditions

During normal operations the gearbox and generator will generate heat within the closed nacelle

compartment, and secure suitable temperature conditions for all components.

Sensors monitor the ambient temperature, as well as all relevant component and system temperatures,

and shut the turbine down if operational limits are exceeded.

After a stand still, where components have become very cold, nacelle-heating equipment will ensure

heating up before resuming normal operation.

There are two purposes for this: first to ensure that the lubricants have optimal properties and secondly

to heat up the nacelle including gearbox, generator, main bearing and yaw mechanism.

Operation will not commence until specified components have obtained their minimum temperature

acceptance level. The wind turbine computer continuously checks the temperature level.

During operation the nacelle heating equipment will automatically be turned on and off, to secure

acceptable operation temperature inside the compartment.

3 Arctic equipment and component specific details

3.1 Nacelle heating

In order to heat the nacelle, 2 fan heaters are installed in the nacelle. They have a capacity of 20 kW

each. The fan heaters are mounted primarily to warm up the yaw mechanism and the main gear.

Secondarily, they heat all other components in the nacelle.

SF# 1107117

 

MG&E Turbine Supply Agreement, Exhibit D.1.5

DOCUMENT NO.: C72/82-0124

NM72/82 Arctic Specification

PAGE 4/6

The heating units are controlled by the wind turbine computer on basis of temperature sensors, which

are placed in the nacelle compartment, gear oil and bearings, cooling liquid, and the bearings of

generator, rotor shaft and yaw system.

3.2 Gearbox

Cartridge heaters are installed in the gearbox, in order to heat the oil, when starting up at low

temperatures. The gearbox is equipped with 3 heaters at a capacity of 0.8 kW each.

The sequence of heating up the oil in the gearbox is:

1.

Cartridge heaters and the nacelle heaters will heat up the oil from ˜ °C to  °C

2.

When the oil reaches -20°C the turbine will be allowed to idle with at max speed of 250 RPM.

The idling operation is an effective way of heating up the gear box oil.

3.

When the oil temperature reaches ±0 °C the tu rbine is allowed to generate max. 400 kW of

power.

4.

When the oil temperature reaches +10 °C the turbine is released for normal operation.

The procedure is shown in the graph below.

SF# 1107117

                                                     

MG&E Turbine Supply Agreement, Exhibit D.1.5

DOCUMENT NO.: C72/82-0124

NM72/82 Arctic Specification

PAGE 5/6

180

0

Normal operation

160

0

60 Hz

Limited operation,

140

0

120

0

Ge

ner

ato

60 Hz

r

100

0

RP

M

50 Hz

800

50 Hz

No grid connection,

Limited operation,

600

max idle speed 250

RPM

400

200

0

-40

-

30

-20

-

10

0

10

20

30

40

Gear oil sump temperature [°C]

3.3 Cooling system

The NM72/82 cooling system is designed to operate in temperature ranges from ˜°C to +40°C

This system is standard for all NM72/82s.

3.4 Meteorological equipment

The arctic specification turbine will, as a standard, have:

One Ultra sonic FT702LT combined wind vane and anemometer

One NRG IceFreeII Wind Direction Vane

One NRG IceFreeII Heated anemometer

The ultra sonic instrument has three heating elements and an “intelligent” deicing control.

Parameters for the control of the heating element can be set by the user.

The heaters draw up to 6A in extreme conditions.

The picture below shows the ultra sonic instrument, mounted next to standard wind vanes and

anemometers in an icing situation.

The NGR instruments have a simple internal heater that maintains the instrument at 140°C by means of

a PTC resistance element.

SF# 1107117

 

MG&E Turbine Supply Agreement, Exhibit D.1.5

DOCUMENT NO.: C72/82-0124

NM72/82 Arctic Specification

PAGE 6/6

3.5 Rotor

The pitch hydraulic system uses oil with low index of viscosity suitable for operation at -30°C. The

accumulators mounted in the hub are equipped with heating mats to ensure proper viscosity of the oil.

There are 9 heating mats at a capacity of 0.2 kW each. Furthermore, the grease on the bearings is

different from standard due to the viscosity.

As a standard, blades are suitable for operation at ˜°C.

3.6 Controller

The controller is, as a standard, mounted with heaters as follows: 2 x 0.35 kW in the power panel, 2 x

0.35 kW in the control panel, 2 x 0.35 kW in the power factor correction panel and 1 x 0.35 kW in the

top box. There are no additional heaters mounted in the controller at the arctic version.

Thermal sensors in the cabinets control the heating elements, which are turned on if the temperature

falls below the preset minimum limit. The heaters will secure adequate temperatures for running the

wind turbine computer.

3.7 Structural parts

All structural parts, e. g. tower, mainframe, hub, bolts and blades are, as a standard, suitable for

operation at ˜°C and surviv

al to at least  °C.

SF# 1107117

Power Factor Correction

[Description: Drawing of a turbine cut-in.]

•

The full load compensation system maintains unity Power Factor after turbine cut in using a 5 step capacitor bank.

•

The TAC II controller continuously measures the actual reactive compensation needed. The system then maintains specified Power Factor by switching in or out a combination of capacitor steps that meet the required reactive compensation.

•

The TAC II controller can switch steps in any order, but each step requires a 2 minute discharge delay before being activated again.