1Helder_leite et al. UK ALPHA 4 – Block 3 – Question 7

Barcelona 12-15 May 2003

A basic feeder voltage control system with AVRS

Sending-endbusbar

Transformer

VS VDG

Distributionnetwork

LoadTap driving circuit

AVC relay

DG

DGbusbar

Automatic voltage referencesetting (AVRS) device

Loadbusbar

V’refVs VL VDG

VL

2Helder_leite et al. UK ALPHA 4 – Block 3 – Question 7

Barcelona 12-15 May 2003

RTDS based a closed-loop testing facility

AVRS device Voltage amplifier Workstation

3Helder_leite et al. UK ALPHA 4 – Block 3 – Question 7

Barcelona 12-15 May 2003

The connection of the RTDS feeder model and the RMS900 prototype AVRS

device

11kVbusbar

33kVNetwork

L1 L2

Load1Transformer

Load2

DG

ManualTorquecontrol

VDG

RTDS equipment

RTDS feeder model

RMS900prototype

AVRS device

V’ref

VS

VS

VDG

VS

AmpAVC relay

MicroTAPP

Tap-up

Tap-down

Tap drivingcircuit

4Helder_leite et al. UK ALPHA 4 – Block 3 – Question 7

Barcelona 12-15 May 2003

The feeder voltage changing profiles as the various DG outputs

VDG

PDG

VS

t1 t2 T1 T2 t3 T3 T4