Future Cross Border Trading on the Grid

  • Session Topic
    Grid Integration

Future Cross Border Trading on the Grid

3 Oct 2018, 1:40 PM - 3:00 PM

Room 220
Language:
English (Australia)

Chair: Simon Taylor, Group Manager Network Customers, Powerlink Queensland

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Maximizing existing network capability to support the renewables transition

Jacqui Bridge, Transmission Network Development Manager, Ausnet Services

Significant transmission network developments are planned across the NEM to support connection of large scale renewable generation. Delivery timeframes for this transformational system plan will span across decades.  In the interim, AusNet Services is pursuing a series of smaller scale projects designed to maximise the capability of the existing electricity transmission network to support the transition to renewable generation. These projects can be deployed considerably faster than new network infrastructure and allow incremental increases in network capacity through the application of innovative technology and dynamic operational control.

  • AusNet Services in conjunction with AEMO is progressing installation of wind monitoring equipment in additional strategic locations to extend existing dynamic line rating capability across the network and allow increased power flows in constrained areas of the network.
  • AusNet Services plans to install innovative modular power flow control technology designed and manufactured by SmartWires to increase transfer capability between Victoria and New South Wales, enabling Victoria to import more power during peak demand. The installation will optimise load sharing between existing 330 kV lines, improving capacity utilisation and allowing increased power transfer between the states. The installation of modular devices can be expanded or even relocated in future, offering flexibility in meeting the evolving requirements of the Victorian energy system.
  • Installation of large scale battery storage systems by third party providers, connecting directly to the transmission network provide opportunities to test the use of storage to manage network constraints and supplement network capacity.
  • The ability to apply dynamic line and equipment ratings, operationally control power flow and leverage energy storage allows maximum utility to be obtained from the existing network, while potentially deferring and optimising the timing of major capital network investment, minimising cost and maximising value to customers. The ability to rapidly deploy these measures allows greater visibility to emergent network needs, and lower risk of asset stranding amidst uncertainty around future, large scale developments. These projects represent some of the strategies AusNet Services is pursuing to maximise utilisation of its existing network assets to address the challenges associated with the energy transition whilst continuing to serve the Victorian energy consumers. 

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Project Marinus: Tasmania’s vast wind and hydro resources might only be a cable away

Lance Balcombe, CEO, TasNetworks

This presentation will provide an overview of Project Marinus – a feasibility and business case assessment that TasNetworks is undertaking in partnership with the Australian Renewable Energy Agency to investigate the potential for further Bass Strait interconnection. The energy sector is going through a rapid transformation. The scheduled closure of coal-fired power generation heralds significant gaps in Australia’s electricity supply. Large-scale wind and solar generation are proving to be the most likely and lowest cost new generation sources. However, to ensure supply remains reliable and the system secure, the grid will also need to draw upon immediately dispatchable power. Hydro power can provide this clean, firming capacity at low cost.

It’s in this (well-known) context that Tasmania has an increasingly important role to play for the future grid. The state has an abundance of hydro capacity that is used to great effect – and that’s without the potential upgrade of existing Tasmanian hydro assets to become pumped-hydro generators. Tasmania also has capacity for a much larger amount of wind generation. Our coast is graced with world class wind resources that complement the output of South Australian and Victorian wind. It’s a vast resource yet to be fully harnessed, with the potential to provide a further 1GW of capacity. These resources are recognised in AEMO’s modelling of renewable energy Zones. They could provide support for the nation’s drive to secure a reliable, affordable and renewable energy future. This support is, however, contingent upon further Bass Strait interconnection. 

Tasmania’s resources may only be a cable away. But before this kind of grid upgrade could even begin to go ahead, it’s imperative that we understand whether or not its value is greater than its cost. Project Marinus is examining just that. The Project is developing a detailed feasibility and business case assessment that is credible and objective, has the support of key stakeholders and, should it prove beneficial to progress with a “Marinus Link”, begins the critical path to unlocking Tasmania’s vast renewable resources. Our presentation will provide further detail on the potential value further Bass Strait interconnection could provide for the future grid, the advances in HVDC technology that would support this link, and updates on the project’s findings to date, in anticipation of the release of our initial feasibility report in December this year.

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Thermo-hydrodynamic analysis and cable design for 10 km to 100 km superconducting DC power transmission line using Ishikari experimental data

Prof. Hirofumi Watanabe, Center of Applied Superconductivity and Sustainable Energy Research (CASER), Chubu University

Main merit of the DC superconducting power transmission line is low loss even in low voltage power transmission. It should be realized when the transmission length is long. Since it is a small system, its system cost will be lower than the copper cable system finally. Since the loss of the DC superconducting power transmission line depends on the heat leak from the cryogenic pipe, the main subject is to realize low heat leak from the cryogenic pipe and high COP of the refrigerator is required. At the same time, low circulation power of liquid nitrogen is also necessary. After these subjects are solved, we will be able to construct an ultra-long transmission line to connect all over the world. The target values of the heat leak and the COP of refrigerator were defined in 1990’s, and they are 1.0W/m and 0.1, respectively. The heat leak is a sum of the round trip of cryogen in the pipes. The COP of refrigerator has the upper limit because of Carnot cycle efficiency. 

The heat leak of cryogenic pipe lower than 1 W/m for round trip was realized in Ishikari project [1] in 2016 in very low pressure drop of the cryogen circulation [2]. We also pay attention on the temperature rise of the cable for a longer transmission because if it is high, we should install the cooling stations along the transmission line for a short distance. In order to keep the operational current for a longer cable, the inlet and outlet temperatures of cryogenic pipe should be minimized for a long transmission line. The temperature rise of the cable depends on the heat leak and the flow rate of the cryogen, and the output pressure of the cryogenic pump should be proportional to the cubic of the length [3, 4], and its rise is only 0.03 – 0.03 K/km in Ishikari project. This means that we could construct 10km ~ 100km transmission line basically, and the cooling stations are located at both ends.

We analyze the experimental data, especially for the temperature rise and the pressure drop of cryogenic pipe from the heat leak and the flow rate of cryogen, and show some designs of 10 km ~ 100 km transmission line. We also show the electric parameters of the DC cable.

Contributors

  • Simon Taylor

    Chairperson

    Group Manager Network Customers

    Powerlink Queensland

    Simon Taylor has more than 30 years’ experience across various roles in the electricity transmission and oil industries. Simon is a highly...

  • Jacqui Bridge

    Speaker

    Transmission Network Development Manager

    Ausnet Services

    Jacqui Bridge, Transmission Network Development Manager at AusNet Services, leads and advocates for Victorian transmission development to support the...

  • Lance Balcombe

    Speaker

    CEO

    TasNetworks

    Lance Balcombe was appointed the Chief Executive Officer of Tasmanian Networks Pty Ltd in October 2013. He previously served at Hydro Tasmania in a...

  • Prof. Hirofumi Watanabe

    Speaker

    Center of Applied Superconductivity and Sustainable Energy Research (CASER)

    Chubu University

    Hirofumi Watanabe received the degrees of B. Eng., M. Eng., and D. Eng. from Kyoto University, Kyoto, Japan, in 1991, 1993, and 1998, respectively....

Opening Times
Wed 3 Oct Exhibition 9.00am – 5.00pm
Wed 3 Oct Networking Event 5.00pm - 6.30pm
Thur 4 Oct Exhibition 9.00am – 5.00pm

Registration opens 8.00am

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