MV1305-405 Mobile Motor / Generator Unit

Description

MV1305-405 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	MV1305-405-235
Power Supply AC 3-ph	380-415 V
Frequency	50 Hz
Max current	16A
Turbine/AC-machine freq.drive:
Armature/stator Volt AC	323-528 V
Frequency	0-63 Hz
Armature/stator current	3.4 A
Input current	5.9 A
Rated output current	4.0 A
Rated output capacity	3.2 kVA
Speed	0-1800 rpm
Synchronous generator:
Armature volt AC 3-ph	0-140 / 240 V
Power	1.2 kVA
Cos ϕ	0.8
Field volt	0-230 V DC
Speed Controll	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

Instruments

AC-machine freq.drive (Turbine simulator):

• Parameters and indications selected by 4-lines display in HMI-unit typically like: Frequency setpoint (F50,00Hz)
• Stator Electric Frequency (H 51,00 Hz)
• Actual motor speed (from encoder 1500 rpm)
• 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

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 slirails. 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.

Item	Power Supply	Synchronous Generator
MV1305-405-235	380-415V 3-ph, 50Hz	220-240V 3-ph, 50Hz
MV1305-405-236	380-415V 3-ph, 60Hz	220-240V 3-ph, 60Hz
MV1305-405-405	380-415V 3-ph, 50Hz	220-240V 3-ph, 50Hz
MV1305-405-406	380-415V 3-ph, 60Hz	220-240V 3-ph, 60Hz