We are updating communication and control requirements for embedded generators that use SCADA for emergency backstop, including large generators and those connecting to the High Voltage (HV) network. These updates support the NSW Government’s Emergency Backstop Mechanism and prepare for updated licence requirements. They will help maintain a safe, reliable and stable electricity network.
Who this applies to
The updated requirements apply to embedded generation projects that will use SCADA for emergency backstop and have a Connection Agreement signed on or after 1 January 2027. This includes large generators and those connecting to the High Voltage (HV) network.
Projects with a signed Connection Agreement before 1 January 2027 are not affected by these updated requirements.
Upgraded licence conditions
The NSW Government is amending electricity distribution licence conditions for NSW distribution network service providers, including Essential Energy, to introduce the Emergency Backstop Mechanism. These conditions require networks to be able to temporarily reduce solar exports or pause generation during rare emergency conditions, and only when directed by the Australian Energy Market Operator.
Affected systems must be able to receive and respond to operational limits during Minimum System Load events to help protect power system security.
For HV embedded generation, Essential Energy is applying these obligations through SCADA communication and control requirements.
What is changing?
Embedded generation systems covered by these requirements will need a SCADA solution using an Essential Energy-owned remote terminal unit (RTU) installed at the customer’s premises.
The customer’s generator controller must be able to receive limits from the Essential Energy RTU and respond within the required timeframe. Alternative communication methods, such as CSIP-AUS, may be considered for smaller systems, subject to Essential Energy approval.
How to prepare for the change
If your application is already in progress: contact the Connections Co-ordinator assigned to your project to confirm whether the updated requirements apply, discuss timing and identify any design changes needed.
For future applications: consider these requirements during design development and include communications via a SCADA remote terminal unit (RTU) where applicable.
For detailed technical requirements, refer to Technical Standard CEOS7903, Embedded Generation - SCADA Connection and Emergency Backstop Requirements.
