Colloquium - HVDC and Power Electronics:
Enhancing the Transmission Networks
Brisbane Australia

19-21 October 2011

Study Committee B4 and Working Group Meetings
(for members and invitees only)

Melbourne Australia
15-18 October 2011

 


HVDC and Power Electronics projects in Australia and New Zealand

Australia

Basslink


 

Project type

HVDC interconnector

Location Bass Strait, between Victoria and Tasmania
Converter stations at Loy Yang (Victoria) and Georgetown (Tasmania)

Capacity

- 400 kV DC transmission
- 12 pulse bridge line commutated HVDC
- 60 thyristors per valve, 720 total per station
- 500 MW continuous rating. Dynamic facility for limited time of up to 6 hours for 630 MW

Year of commissioning

2006

Purpose

To connect the 500 kV transmission system in Victoria and the 220 kV transmission system in Tasmania, at 290 km in length, Basslink is the world's second longest submarine power cable

 

Directlink HVDC Light Project


 

Project type

HVDC interconnector

Location

Between New South Wales and Queensland, with converter stations at Bungalora (New South Wales) and Mullumbimby (Queensland)

Capacity

Main data
Rated power: 3x60 MW
DC voltage: ± 80 kV
DC current: 342 A per converter
AC system voltage
Bungalora 110 kV
Mullumbimby 132 kV

AC filters (per converter)
39th harmonic 1 branch
78th harmonic 1 branch
IGBT valves
Valve type: two level
Cooling system: water
IGBT type: 2.5 kV/500 A

Year of commissioning

2000

Purpose

An HVDC Light project to connect the New South Wales and Queensland electricity grids and to boost supply services to the Tweed Heads region of New South Wales

 

Murraylink HVDC Light Interconnection



 

Project type

HVDC interconnector

Location

Between South Australia and Victoria, with converter stations at Berri (South Australia) and Red Cliffs (Victoria)

Capacity

Main data
Rated power: 220 MW
DC voltage: ± 150 kV
DC current: 739 A
AC system voltage
Red Cliffs 220 kV
Berri 132 kV
Reactive support at rated power
Inverter operation: -100 +100 MVAr
Rectifier operation: -75 +125 MVAr
IGBT valves
Valve type: VSC 3 level
IGBT type: 2.5 kV/1000 A
Cooling system: water
HVDC Light cables
Cross section: 1200 and 1400 mm2, Aluminium
Outer diameter: 80.2 and 83.7 mm
Length: 2×176 km

Year of commissioning

2002

Purpose

An HVDC Light project, with converter stations at Red Cliffs in Victoria and Berri in South Australia,  to connect the Riverland region of South Australia and the Sunraysia region of Victoria. At 176 km in length, Murraylink is the world's longest underground high-voltage interconnection

 

SVCs in New South Wales - Broken Hill, Kemps Creek, Lismore, Armidale, Sydney West
Transgrid is the owner and asset manager of these SVCs

Broken Hill

Project type

SVC installation

Location

New South Wales

Capacity

Nominal Swing Range: 25 MVAr Inductive to 25 MVAr Capacitive

Year of commissioning

1986

Purpose

To enable a large mining load connection at the end of a long radial transmission line that is heavily loaded and part of a weak system while maintaining voltage stability and quality of supply for loss of mining load (connected through a frequency converter), circuit switching, and reactive plant switching

Kemps Creek

Project type

SVC installation

Location

New South Wales

Capacity

Two SVCs each with nominal swing range of 100 MVAr Inductive to 150 MVAr Capacitive

Year of commissioning

1990

Purpose

To enhance transient stability, and restore New South Wales to Victoria transfer limits to pre-interconnection levels as part of the three state interconnection project (New South Wales, Victoria and South Australia)

Lismore

Project type

SVC installation

Location

New South Wales

Capacity

Nominal swing range 100 MVAr inductive to 150 MVAr capacitive

Year of commissioning

1999

Purpose

To maintain voltage stability in the event of the loss of the single 330 kV supply to the region as well as improve voltage regulation during normal load variations and switching of reactive plant, and to regulate the supply voltage generally so as to reduce system losses

Armidale

Project type

SVC installation

Location

New South Wales

Capacity

Nominal swing range 120 MVAr inductive to 280 MVAr capacitive

Year of commissioning

2000

Purpose

To enable voltage stability under contingency conditions, transient stability following system contingencies, voltage regulation, and to contribute to steady state stability

Sydney West

Project type

SVC installation

Location

New South Wales

Capacity

Nominal swing range 100 MVAr inductive to 280 MVAr capacitive

Year of commissioning

2004

Purpose

To improve interconnection power transfers that arise under Australia's National Energy Market (NEM), account for the planned retirement of synchronous condensers in the Sydney area, to maintain voltage stability and transient stability, and to regulate the substation bus voltage to the required set point under normal and contingency conditions

 

SVCs in Queensland - Railways, Nebo and Strathmore, Ross, Woree, Sydney West, Alligator Creek, Blackwall and Braemar, Greenbank, South Pine and Woolooga
Powerlink Queensland is the owner and asset manager of these SVCs

Railways SVCs (Grantleigh, Dingo, Blackwater, Gregory, Oonooie, Coppabella, Moranbah, Dysart and Mt McLaren)

Project type

SVC installation (nine installations)

Location

Queensland

Capacity

Oonooie SVC
A-B: -14 to +17 MVAr
B-C: -12 to +19 MVAr
C-A: -15 to +16 MVAr
(Oonooie is typical of the nine SVCs)

Year of commissioning

1986

Purpose

To balance single phase railway traction loads at relatively weak points in the transmission system. The fault level at a typical railway connection point can be as low as 300 MVA, while the railway load can be as high as 30 MW, which can result in voltage unbalance in the order of 10% unless the unbalance is compensated

Nebo and Strathmore SVCs

Project type

SVC installation (two installations)

Location

Queensland

Capacity

Nebo: -80 to +260 MVAr
Strathmore: -80 to +260 MVAr

Year of commissioning

Nebo: 1987
Strathmore: 2007

Purpose

To enhance the power transfer in the interconnection between Central and Northern parts of the transmission system in Queensland. Both these SVCs have a part of their swing range that can operate in single phase mode to balance single phase railway loads in the area

Ross SVC

Project type

SVC installation

Location

Queensland

Capacity

-80 to +150 MVAr

Year of commissioning

1998

Purpose

To stabilise Powerlink’s transmission system in the city of Townsville. The Ross SVC also provides some power oscillation damping of the transmission system in North Queensland
Woree SVC

Project type

SVC installation

Location

Queensland

Capacity

-80 to +150 MVAr

Year of commissioning

2005

Purpose

To stabilise the transmission system in the city of Cairns, which is the northern-most point of Powerlink’s transmission system in Queensland

Alligator Creek SVC

Project type

SVC installation

Location

Queensland

Capacity

-80 to +150 MVAr

Year of commissioning

2009

Purpose

To stabilise the transmission system to the Dalrymple Bay coal loading facility as well as balancing single phase railway loads in this area

Blackwall and Braemar SVCs

Project type

SVC installation

Location

Queensland

Capacity

Blackwall: -50 to + 250 MVAr
Braemar: -80 to +150 MVAr

Year of commissioning

Blackwall and Braemar: 2000

Purpose

The Blackwall and Braemar SVCs were installed as a part of an interconnection between Queensland and New South Wales, and are required to ensure the stability of the interconnection. The Blackwall SVC damps power oscillations that can occur on the interconnection

Woolooga, Greenbank, and South Pine SVCs

Project type

SVC installation (three installations)

Location

Queensland

Capacity

Woolooga: -100 to +350 MVAr
(Woolooga is typical of the three SVCs)

Year of commissioning

Woolooga is typical of the three SVCs and was commissioned in 2008

Purpose

The Greenbank, South Pine and Woolooga SVCs are required to stabilise the transmission system into Brisbane. The Greenbank and South Pine SVCs assist the Blackwall SVC to damp power oscillations that can occur on the interconnection between Queensland and New South Wales

 

SVCs in Western Australia
Western Power is the owner and asset manager of this SVC

Southern Terminal SVC

Project type

SVC installation

Location

Western Australia

Capacity

Swing range of 100 MVAr (reactive) to 200 MVAr (capacitive)

Year of commissioning

2009

Purpose

To maintain voltage stability with increased power transfer from the South West of Western Australia. The SVC comprises four single phase transformers to reduce the return to service time. It also comprises a thyristor controlled reactor, a thyristor switched capacitor, and a fifth harmonic filter

 

SVCs in South Australia
ElectraNet is the owner and asset manager of these SVCs

Para

Project type

SVC installation

Location

Near Adelaide, South Australia

Capacity

Two SVCs, each with a nominal swing range of 80 MVAr inductive to 80 MVAr capacitive plus automatic switching of two 100 MVAr capacitor banks based on SVC output.  The SVCs are connected via two transformers, each with opposite 15° phase shifts to synthesise 12 pulse operation

Year of commissioning

1989

Purpose

To maintain voltage stability for a first contingency transmission line fault or generation loss on the South Australian interconnected system, and to provide power oscillation damping via a power system stabiliser

South East

Project type

SVC installation

Location

Near Mount Gambier, South Australia

Capacity

Two SVCs, each with a nominal swing range 65 MVAr inductive to 65 MVAr capacitive plus switchable 15MVAr Harmonic Filter.  The SVC control system also automatically switches one 100 MVAr capacitor bank based on SVC output. The SVCs are connected via two transformers, each with opposite 15° phase shifts to synthesise 12 pulse operation

Year of commissioning

1989, with control, secondary systems and the cooling system replaced in 2007

Purpose

To maintain voltage stability for first contingency transmission line fault or generation loss on the South Australian interconnected system, and provide Power Oscillation Damping via a Power System Stabiliser

New Zealand

New Zealand Inter-Island HVDC Link
Transpower is the owner, operator, and manager of these assets

See also this link for more information specific to this project

              

Project type

HVDC interconnector

Location

Between Benmore (on the Waitaki River near Otematata) and Haywards (near Wellington)

Capacity

-350 kV, 700 MW (present), upgrading to 1,000 MW in 2012

Year of commissioning

1965 - mercury arc bipole (capacity +/- 250 kV, 600 MW)
1991 - mercury arc, thyristor valve hybrid link (capacity increase to +270/-350 kV, 1,240 MW)
2012 - planned - decommissioning of mercury arc valves and upgrading with a thyristor pole. +/- 350 kV, 1,000 MW

Purpose

To connect significant South Island hydroelectric generation with major North Island load centres. Half of the mercury arc valves in Pole1 were decommissioned in 2008, and the remaining half of Pole1 continues to be in service under limited operating conditions in the northwards direction only

In 1991, the link was upgraded by adding a thyristor converter, and reconfigured to increase capacity. The hybrid configuration comprises two poles:
- Pole 1 rated 270 kV, 540 MW using mercury arc valve groups, and
- Pole 2 rated 350 kV, 700 MW with thyristor valves

A new pole will replace Pole 1, increasing the north flow capacity of the HVDC bipolar link to 1,000 MW from 2012 (Stage 1) and to 1,200 MW from 2014 (Stage 2) by the addition of a Statcom at Haywards. A third stage (involving the addition of a new submarine cable) to increase the capacity to 1,400 MW will be implemented at a later date subject to regulatory approval

 

Islington SVC 9

Project type

SVC

Location

Near Christchurch, South Island

Capacity

+150/-75 MVAr

Year of commissioning

2009

Purpose

For voltage regulation and to enhance the voltage stability of the transmission system supplying Christchurch and the upper South Island

 

Albany SVC

Project type

SVC

Location

Near Auckland, North Island

Capacity

+/-100 MVAr

Year of commissioning

2009

Purpose

To enhance the voltage stability of the transmission system supplying Auckland and the upper North Island

 

Islington SVC 3

Project type

SVC

Location

Near Christchurch, South Island

Capacity

+60/-50 MVAr

Year of commissioning

1996

Purpose

To enhance the voltage stability of the transmission system supplying Christchurch and the upper South Island

 

Kikiwa STATCOM

Project type

STATCOM

Location

Kikiwa, northeast of Murchison

Capacity

40 MVAr

Year of commissioning

2010

Purpose

New Zealand’s first large-scale STATCOM to strengthen the transmission grid and cover increasing South Island demand

 


Important Dates

The organizing committee invites authors to prepare and submit their synopses, papers and presentations for the colloquium as per the following schedule:

Submission of synopses 15 January 2011
Authors informed of synopsis acceptance

15 February 2011

Submission of papers 15 June 2011
Submission of presentations  15 August 2011

The synopses, papers and presentations must be sent electronically to:

scb4meeting@cigre.org.au