NS194
Embedded Generation
NS194: Embedded Generation
This standard prescribes the technical requirements for connection of embedded generation to Ausgrid’s network. Its intent is to address possible adverse impacts of the embedded generation.
Scope
This document outlines the requirements for connecting embedded generation to the Ausgrid network.
Embedded generators are capable of being connected in parallel to Ausgrid’s network and may include inverter energy systems (such as solar PV and batteries), as well as rotating machines (such as synchronous and asynchronous turbines/alternators).
The primary focus of this standard is on anti-islanding protection requirements, along with select other technical requirements related to protection such as voltage and power quality control. Requirements vary depending on generator type and rated capacity.
This standard also covers earthing requirements for embedded generators and establishes the technical review and approval requirements based on the type of generator connection.
Short circuit protection systems for embedded generators are not covered in this standard; for those requirements, refer to AS/NZS 3000, the NSW Service & Installation Rules and the National Electricity Rules.
Standby generators, which will never operate in parallel with the Ausgrid’s network are covered in Section 8.3 of the NSW Service & Installation Rules and AS/NZS 3010 Electrical Generating Sets Safety. No additional requirements are outlined for standby generators.
This standard defines specific requirements for the connection of Inverter Energy Systems (IES) to the Ausgrid network, including variations or additions to AS/NZS 4777.1 and AS/NZS 4777.2. However, the AS/NZS 4777.1 and 4777.2 standards do not apply to rotating machines.