TECHNICAL PROPOSAL

ABB PCS100 AVC – ACTIVE VOLTAGE CONDITIONER

200 kVA 380 V 50Hz

Prepared by

ABB Limited

For

Dai Hoa Co.,ltd

Luong Van Han

ABB LimitedDiscrete Automation and Motion DivisionPower Conversion

Km 9, National Road 1A, Hoang Liet, Hoang Mai, Hanoi, Vietnam

Hand Phone: +84 906 007769www.abb.com.vn

1

Table of Contents

1. Operating Principle ........................................................................................................................ 2

2. Specifications ................................................................................................................................ 3

3. System Description ........................................................................................................................ 6

3.1. Overview ................................................................................................................................ 6

3.2. Modules Interconnect Layout ................................................................................................. 7

3.3. Injection Transformer ............................................................................................................. 7

3.4. Circuit Breaker ........................................................................................................................ 7

4.Performance Curves ....................................................................................................................... 8

4.1. AVC 30% Single Phase Event Performance Curves, Line to Line Output ................................... 8

4.2. AVC 30% Single Phase Event Performance Curves, Line to Neutral Output .............................. 9

4.3. AVC 30% Balanced 3 Phase Event Performance Curves ......................................................... 10

1. Operating PrincipleThe ABB PCS100 AVC Active Voltage Conditioner is a three phase low voltage product whichcorrects voltage sags, phase angle errors, unbalance and surges, while providing continuous voltageregulation. The standard PCS100 AVC requires no energy storage as it draws the additional powerrequired to make up the correction voltage from the mains supply.

Power Supply before AVC Power supply after AVC

AVC

Sag Occurs Sag Corrected

Figure 1 – PCS100 AVC Concept showing Sag Correction

The ABB PCS100 AVC consists of a voltage source inverter, bypass circuit and an injectiontransformer connected in series between the incoming mains supply and the load, as shown in Figure2 below. For the standard sag correcting ABB AVC models, the injection transformer consists of a boostcomponent.

The ABB PCS100 AVC monitors the incoming supply voltage and when it deviates from the nominalvoltage level the ABB AVC inserts an appropriate compensating voltage using the IGBT inverter and seriesinjection transformer. Energy is sourced from the supply during this time. This regulates the load voltage to itsnominal value, thus eliminating voltage disturbances from the mains supply affecting the load.

Figure 2 – PCS100 AVC Block Diagram

2. Specifications

Load Capacity Lift system

Capacity 125 – 2400 kVA; up to 10MVA as customdesign

150 kVA

Displacement Power Factor ofconnected load

0 lagging to 0.9 leading

Crest Factor for rated kVA 3.0 at 100% of rated current

Overload capability from 100%supply voltage

150% overload for at least 30 seconds, onceper 500s

Input Supply Lift system

200 kVA

Nominal Supply Voltage (accordingto model)

480V 60Hz, 400V 50 Hz (380/400/415V)

208V 60Hz, 208V 50Hz

Other LV by special option380V 50Hz

Maximum Supply Voltage 110% of nominal supply voltage

Power system type 3 phase, centre ground referenced

Supply overvoltage category III – suitable for fixed installations accordingto IEC 60664-1; 4kV impulse

Fault capacity 25kA

Outage – control ride through > 500ms

Required Transformer Supply Bus-Bar size rating

< 80oC operating temperature at rated load

Output for AVC models with 30% correction Lift system

200 kVA

Nominal output Voltage (V) Set to match nominal supply voltage 380V 50Hz

Adjustment range of outputvoltage ± 10% of nominal

3 input voltage continuousregulation range ± 10%

3 voltage regulation accuracy± 1% typical± 2% maximum

3 balanced sag correction ability(from 70% remaining voltage) +30% for 30s

1 to ground sag correction ability +45% for 30s

Sag correction accuracy (withinspecified range) ± 3%

Sag correction response- Initial- Complete

<250us< 0.5 cycle

Equivalent series impedance(operating) < 4% typical

Efficiency of system 97.7%

Bypass Lift system200 kVA

Capacity 100% of model rating (kVA)

Maximum overload capacity (inbypass)- 10 minutes- 1 minute- 1s- 200ms

125%150%500%2000%

Transfer time- Inverter to Bypass- Bypass to Inverter

< 0.5 ms< 250 ms

Equivalent series impedance(bypass)

< 2.5% typical

Injection Transformer Lift system200 kVA

Transformer type DryInsulation UL class N, 200oC operating

Finish Dipped finish for moisture proofing

Frequency 50Hz or 60Hz models 50HzVector group Diii (delta + 3 independent windings)

Enclosure Lift system

200 kVA

Plinth 150mm high plinth, 6mm steel, welded andpowder coated.

Enclosure- Panels

- Door

- Frame

1.5mm electro-galvanised sheet steel2.0mm electro-galvanised sheet steel withstiffener frames2.0mm electro-galvanised sheet steel fullywelded

Finish Standard epoxy-polyester powder coatingRAL7035 textured finish.

Environmental Lift system

200 kVA

Enclosure environmental rating IP20 standardIP21 by optional roof kit (consult factory) IP20

Pollution degree rating 2Minimum operating temperature 0 OCMaximum operating temperatureat full load

40OCTemperature derating Above 40o C derate at 2% load per C to a

maximum of 50 OCCapacity derating with elevation -1.2% every 100m above 1000m, 3000m

maximumCooling- Inverter- Transformer

forced ventilationfan assisted ventilation

Humidity < 95%, non-condensingEMC emissions CISPR 11 level ANoise (2m from front, open areameasurement)

0.5B to 6B: <75dBA,>6B: <80dBA

<75dBA

Standards Conformance Lift system200 kVA

Standards Conformance EN50178C-Tick

Power Quality Event Monitor Lift system

200 kVA

Events Recorded Voltage SagVoltage Surge

Event Detection Input Voltage only used for eventdetection

Sag Threshold 90% of supply voltageSurge Threshold 110% of supply base voltageAccuracy – Voltage- Duration

+/- 2%10ms

Serial Communications Lift system200 kVA

Access protocol Ethernet connectivity; Modbus TCP

3. System Description

3.1. OverviewThe PCS100 AVC incorporates the PCS100 Module. The PCS100 module is built as two individualmodules, one is a rectifier, and the other is the inverter. Both the rectifier and inverter modules useIGBT's and allow bi-directional power flow via the integrated sinusoidal filters. These PCS100 modulesare the building blocks of the AVC systems. All power connections to the modules including the DC busconnections have high speed semiconductor fuses for protection of the modules.

The rectifier and inverter modules are coupled together via DC bus connections. These form thebase of all power ranges and are paralleled as required.

3.2. Modules Interconnect Layout

The PCS100 rectifier and inverter modules are connected in parallel to the supply and the injectionwinding. This parallel connection system means that, irrespective of the PCS100 AVCs overall powerrating, the power cable connections are of an easy size to work with which facilitates fast removal andreplacement of any module. While failure of modern electronic equipment is rare it is normal in criticalsystems to hold a stock of spares for system maintenance and repair if necessary. The unique modularsystem allows for a minimal holding of spares stock. In the unlikely event of a failure down time is alsominimised as each module is self-diagnostic and incorporates a display to report its own condition andthe condition of the system to which it is an integrated part of.

3.3. Injection TransformerThe injection transformer consists of a delta connected primary and 3 series connected windingsbetween the supply and the load. The inverter injects a compensating voltage into the primary to addvolts to the supply in the event of sag or subtract volts during a surge.

3.4. Circuit BreakerThe circuit breaker allows the rectifier to be isolated without disruption of the supply to the load.

4.Performance Curves

4.1. AVC 30% Single Phase Event Performance Curves, Line to Line OutputA single phase event on the utility with the AVC at nominal current.

Figure 4-1 – Performance curve for a single phase event on the supply (input) with the AVC at nominalcurrent. Line to Line Output voltage

4.2. AVC 30% Single Phase Event Performance Curves, Line to Neutral OutputA single phase event on the utility with the AVC at nominal current.

Figure 4-2 – Performance curve for a single phase event on the supply (input) with the AVC at nominalcurrent. Line to Neutral Output voltage

4.3. AVC 30% Balanced Phase Event Performance CurvesA balanced three phase event on the utility with the AVC at nominal current.

AVC Output Voltage(Line to Line)*

120%

110%

100%

90%

AVC OutputVoltage

80% UtilityVoltage

70%

60%

50%

40%

AVC in Bypass AVC OnlineAVC

Correctiontime (s)

50s

40s

30%

20%

10%

CorrectionTime 30s

20s

10s

600ms0%

10% 20% 30% 40% 50% 60% 70% 80%0s

90% 100% 110% 120%Utility Voltage (Line to Line)

*AVC output at 0.8 PF for Medium Voltage systems

Figure 4-3 Performance curve for balanced three phase event on the supply (input) with the AVC atnominal current