In addition to the proposed network solution as outlined above, TransGrid has been investigating non-network solutions.
Demand forecasts help us plan the network. TransGrid takes into account forecasts from the Australian Energy Market Operator (AEMO), local forecasts provided by distribution network service providers (in this case, Ausgrid), as well as information provided by our directly connected customers and our own analysis and modelling to understand the needs of our energy users across NSW and the ACT. Forecasts are updated regularly.
TransGrid and Ausgrid are currently projecting higher growth rates over the next 10 years, as published in TransGrid's Transmission Annual Planning Report 2017. Demand Management (non-build options) has the potential to relieve network constraints in the area until 2019 or possibly beyond.
TransGrid has been looking into three emerging technologies for use across the network as well as for project specific solutions. These are energy storage devices, automated demand response (ADR) and geo-spatial mapping. All network and non-network solutions need to meet the level of reliability set by the NSW Government.
In late 2017, TransGrid plans to publish a Project Assessment Conclusions Report (PACR). The PACR will make a recommendation based on analysis of all submissions to the PADR.
If a non-network solution remains the preferred option, TransGrid will tender for non-network solutions. This is likely to be in late 2017, or early 2018.
For more detail on potential non-network solutions that TransGrid has been investigating, see below.
Energy storage devices
In 2014, TransGrid commissioned a 400 kWh lithium polymer battery coupled with 100kW of solar PV at our Western Sydney site to facilitate demand management research and development in NSW. Operational information from this installation is publicly available to support research and development into energy storage across the industry. We have committed to two other battery sites within the Inner Sydney area to better understand how energy storage can improve network capability when they are installed with different organisations in the area.
Automated Demand Response (ADR)
TransGrid is procuring an ADR system that will allow the dispatch of demand response in commercial and industrial buildings and trigger potential energy storage backup devices located behind the meter. Open Automated Demand Response (OpenADR) provides an open demand response interface that allows utilities to communicate demand response signals directly to customers using a common language and the Internet.
Geo-spatial mapping of constraints
We are a partner in the Network Opportunity Maps project with the Institute for Sustainable Futures, funded by ARENA. The purpose of the project is to develop online maps of network constraints that are freely available and updated annually. The maps include planned investment, the potential for renewable energy, and demand management.