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The requirement to install a GSD applies to all applicable connection offers accepted, or executed, on or from 6 February 2023, regardless of when the connection application was submitted or the connection offer was issued.
Please be aware that we can not make any assurances regarding processing times outside what is provided for under the energy laws.
Any relevant applications that have not received a connection offer, or the offer has been issued but not accepted or executed before 6 February 2023, must comply with the requirement to install a GSD.
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Where an embedded network receives a connection approval under the relevant connection standard on or after 6 February 2023, which meets the backstop requirement (i.e. total amount of approved inverter capacity at the connection point of the embedded network to the distribution network is 10kVA and above), all new or replacement inverter energy systems must have a either GSD fitted to each inverter, or utilise the multi-inverter option of a single GSD connected to a Demand Response Controller.
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Sites with an existing connection approval (being an accepted or executed offer prior to 6 February 2023) are not required to install a GSD. If a connection agreement lapses or terminates, any new connection application and offer will be based on the Connection Standard that applies at that time.
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For IES connections that must comply, the emergency backstop mechanism involves:
- Device installation - the installation of a Generation Signalling Device (GSD). Sites with multi-inverters have the option to use a single GSD connected to a Demand Response Controller
- Device signalling - the GSD uses a signal sent over the power line, known as Audio Frequency Load Control (AFLC), to activate the demand response mode ‘DRM 0’ (in an AS/NZS 4777.2 compliant inverter). The ‘DRM 0’ setting is a mandatory capability of inverters under Australian Standards
- Inverter disconnection - when 'DRM 0' is signalled, the inverter will operate a disconnection device in the inverter
- All generation stops - the inverter will shut down, ceasing all generation including for self-consumption solar power at the site
- Inverter reconnection - when the emergency is over, the inverter is sent a signal to reconnect to the network.
As a fail-safe, if an inverter does not receive a signal within 4 hours, the 'DRM 0' setting is designed to automatically reset and allow the inverter to reconnect to the network.
The GSD is a demand response enabled device compatible with Australian Standard AS/NZS 4755.1 Demand response capabilities and supporting technologies for electrical products.
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Only AS/NZS 4777.2:2020 compliant inverters installed from the 18 December 2021 will be eligible to receive LGCs. For more information see the Clean Energy Regulator website.
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Only AS/NZS 4777.2:2020 compliant inverters installed from the 18 December 2021 will be eligible to receive STCs. If you are wanting to claim STCs under the Small-scale Renewable Energy Scheme (SRES) for a AS/NZS 4777.2:2015 compliant inverter, it will need to be installed prior to 18 December 2021. For more information see the Clean Energy Regulator website.
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The emergency backstop mechanism will only be operated by network operators under the direction of AEMO to help maintain a safe and secure network.
This will only occur in response to specific network emergency conditions, such as when the main electricity connection between Queensland and the rest of the National Electricity Market (NEM) is offline at the same time as periods of high levels of distributed generation, like solar PV, being exported to the grid.
Queensland has separated from the NEM five times in the last 10 years, with connectivity typically restored within a short period of time.
On the rare occasion that an electricity network emergency event occurs and AEMO issues a direction under its market notices framework:
- A signal will be issued by network operators which will tell the inverters to disconnect from the network
- When advised that the electricity network has been restored to a state where it will remain secure with reconnection of the impacted inverters, network operators will send a signal to the inverters to allow them to reconnect to the network.
As a fail-safe, if an inverter does not receive a signal within 4 hours, the 'DRM 0' setting is designed to automatically reset and allow the inverter to reconnect to the network.
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We will undertake a review with AEMO, Powerlink and Department of Energy and Public Works within 12 months to review both the AEMO forecasts for minimum demand and the Emergency Backstop Mechanism.
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Exports will depend on the amount of excess energy you produce and the capacity of the local electricity network, which is influenced by the number of solar PV systems nearby.
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FEES
An application fee for us to quote on the removal works will apply. Exit fees may also apply. These will be discussed with you.