MV1305 Mobile Motor / Generator Unit

Description

MV1305 Mobile Motor / Generator Unit is a standard laboratory for power transmission normally consists of one or two generators, which are connected to one or more transmission links which finally reach transformers, distribution units and loads. This configuration may look like the very left line in figure 1.

However, a realistic network most likely looks like the complete network of figure 1. For example, here can be seen turbine/generators in parallel on the same busbar, a synchronous machine used as a synchronous compensator in the middle of a line, a single generator unit and a heavy group of generators.

Energy transfer, load shedding, static and dynamic stability at disturbances as well as sophisticated protection schemes can be studied under realistic forms. Not to forget compensation possibilities.

Power- and current- paths in grid networks are complicated. The TERCO system will give understanding for this problem.

The wide range flexibility will be given by the mobile generator station / synchronous alternator (compensator) MV 1305.

Two sets of MV 1305 can operate as described or work in parallel. In this case mechanical and electrical parameters might be changed by using e.g. flywheel (MV 1010) and different electrical connections.

 

Modes of Operation

  1. Control of active power (frequency): AC-machine and frequency converter drive (”turbine”) + synchronous machine (generator) in closed loop connection regarding frequency.
  2. Control of active power (frequency) and reactive power (voltage): Two closed loops regarding frequency and voltage.
  3. Synchronous compensating: AC-machine and frequency converter drive (”turbine”) idling, electrically disconnected or mechanically disconnected, synchronous machine in closed loop connection for voltage (=reactive power) control.

Technical Specification

 

MV 1305-405

MV 1305-235

Power Supply

Voltage

380-415 V AC 3-ph

380-415 V AC 3-ph

 

Frequency

50 Hz

50 Hz

 

Max current

16 A

16 A

Turbine/AC-machine freq.drive

Armature/stator  Volt

323-528 V AC

323-528 V AC

 

Frequency

47-63 Hz

47-63 Hz

 

Armature/stator current

3,4 A

3,4 A

 

Input current

5,9 A

5,9 A

 

Rated output current

4,0 A

4,0 A

 

Rated output capacity

3,2 kVA

3,2 kVA

 

Speed

0-1800 rpm

0-1800 rpm

Synchronous generator

Armature volt

0-240 / 415 V AC

0-140 / 240 V AC

 

Power

1.2 kVA

1.2 kVA

 

Cos

0.8

0.8

 

Field volt

0-230 V DC

0-230 V DC

Speed control/

Speed

0-1800 rpm

0-1800 rpm

Active power control

SCR-frequency converter, electronic current limit setting, start- and stop ramps.

Feedback systems

Manual frequency setting. Automatic/Constant setting

Field current supply

Integrated

Voltage control/

 

Reactive power control

PWM min. ripple-converter, electronic current limit setting

Feedback systems

Manual voltage setting. Automatic/Constant setting. Separate voltage feedback

Figure 1

Instruments:

 

AC-machine freq.drive

Parameters and indications

(Turbine simulator)

selected by 4-lines display in HMI-unit typically like:

 

Frequency setpoint (F 50,00Hz)

 

Stator Electric Frequency (H 51,00 Hz)

 

Actual motor speed (from encoder)

 

Motor current (A 2,20 A)

 

DC-interlink voltage (V 520 V)

 

Speed control potentiometer

 

(=frequency control)

 

Control method selector

AC-machine M/G

Armature voltage

 

Voltage selector switch

 

Armature current

 

Voltage control potentiometer

 

Control method selector

 

Field current ammeter

Synchronizing devices

Synchronizing instrument

 

Double voltmeter

 

Double frequency meter

 

Synchronizing switch

 

Automatic or manual synchronizing

Auxiliary   

Machines mounted on machine bed with slid rails. Control panel integrated with machines

to one mobile unit. Laboratory connections by 4 mm banana plug of safety type.

Possibilities of connecting different types of step-up transformers

as well as other instruments and protections.

Dimensions

1550 x 800 x 1200 mm

Weight

200 kg (approx.)

[pdf-embedder url=”http://www.tercosweden.com/wp-content/uploads/2019/02/Electrical-Machines-Laboratory_Lres.pdf” page=”36″ title=”Electrical Machines Laboratory”]