~ ~ ~ rgex Part of Energy Queensland Standard for High Voltage EG Connections If this standard is a printed version, then the Ergon Energy or Energex internet site must be referenced to obtain the latest version to ensure compliance. Approver Glenn Springall A/General Manager, Renewable and Distributed Energy If RPEQ sign off required insert details below. Certified Person name Registration Number Certified Person name Registration Number and Position and Position Jennifer Gannon 12770 Robert Coggan 11801 Abstract: This standard provides the requirements for connecting Embedded Generating (EG) Systems greater than 30 kVA in parallel with a Distribution Network Service Providers’ High Voltage (HV) Distribution Network. This standard covers all generating types. Keywords: embedded, generating, high voltage, IES, solar, photovoltaic, wind, diesel, rotating, connection, rotating machine, 1,500 kVA, 1500 kVA, 5 MVA, 5 MW Check this is the latest version before use. i EE STNW1175 Ver 3 EGX 01807 Ver 3 Joint Standard Document between Energex and Ergon Energy Energex Limited ABN 40 078 849 055 ◼ Ergon Energy Corporation Limited ABN 50 087 646 062 Standard for High Voltage EG Connections Table of Contents 1 Introduction........................................................................................................................1 1.1 Purpose....................................................................................................................1 1.2 Scope.......................................................................................................................1 1.3 Obligation of Proponents...........................................................................................2 2 Definitions and abbreviations .............................................................................................2 2.1 Definitions0F...............................................................................................................2 2.2 Abbreviations............................................................................................................4 2.3 Terminology .............................................................................................................5 3 Relevant rules, regulations, standards and codes ...............................................................5 3.1 Standards and codes ................................................................................................5 3.1.1 Energex controlled documents.....................................................................5 3.1.2 Ergon Energy controlled documents ............................................................5 3.1.3 Australian and New Zealand Standards .......................................................5 3.1.4 International Standards................................................................................6 3.1.5 Relevant technical documents .....................................................................7 3.2 Legislation and regulation .........................................................................................7 4 General EG System requirements ......................................................................................8 4.1 Connection categories ..............................................................................................8 4.2 Maximum EG System capacity..................................................................................9 4.3 Generation control ....................................................................................................9 4.4 Export limits at Connection Point...............................................................................9 4.4.1 Export limit study .........................................................................................9 4.4.2 Export limit types .........................................................................................9 4.4.3 Export limit settings ...................................................................................10 4.4.4 Bumpless transfer EG Systems .................................................................10 4.5 Network connection and isolation ............................................................................11 4.5.1 Coordination of EG Systems with Distribution System operation .................11 4.5.2 Grid Isolation Device (GID) ........................................................................11 4.6 Earthing..................................................................................................................12 4.6.1 Neutral isolation ........................................................................................13 4.7 Device approval and compliance.............................................................................13 4.7.1 Protection equipment.................................................................................13 4.7.2 Rotating EG Systems compliance ..............................................................13 4.8 Operating voltage and frequency ............................................................................13 4.8.1 Standard power system voltages ...............................................................13 Check this is the latest version before use. ii EE STNW1175 Ver 3 EGX 01807 Ver 3 Joint Standard Document between Energex and Ergon Energy Energex Limited ABN 40 078 849 055 ◼ Ergon Energy Corporation Limited ABN 50 087 646 062 Standard for High Voltage EG Connections 4.8.2 Lightning insulation levels for surge arrestors .............................................14 4.8.3 Standard power system frequency .............................................................14 4.9 Fault levels and protection impacts .........................................................................15 4.9.1 Fault withstand requirements .....................................................................16 4.10 Power quality..........................................................................................................16 4.10.1 General .....................................................................................................16 4.10.2 Voltage changes and flicker .......................................................................16 4.10.3 Short duration over voltages ......................................................................16 4.10.4 Harmonic distortion....................................................................................16 4.10.5 Voltage unbalance.....................................................................................16 4.10.6 Power quality meter...................................................................................17 4.11 Communication and SCADA requirements ..............................................................17 4.11.1 Communication systems............................................................................17 4.11.2 SCADA requirements ................................................................................18 4.12 Data and information ..............................................................................................18 4.12.1 Static data and information ........................................................................18 4.12.2 Dynamic data and information ...................................................................18 4.13 Cybersecurity and telecommunications ...................................................................18 4.13.1 Communications link .................................................................................18 4.13.2 Traffic inspection and notifications .............................................................18 4.13.3 Traffic flows ...............................................................................................19 4.14 Power system modelling requirements ....................................................................20 4.14.1 General .....................................................................................................20 4.14.2 EMT modelling requirements .....................................................................20 4.15 Interlocking .............................................................................................................20 4.16 Curtailment schemes ..............................................................................................21 4.17 Technical Studies ...................................................................................................21 5 Class A1 and Class A2 EG System requirements .............................................................22 5.1 Inverter Energy Systems.........................................................................................22 5.1.1 Energy Storage System (ESS)...................................................................22 5.2 Class A1 and Class A2 protection requirements ......................................................23 5.2.1 Inverter integrated protection .....................................................................23 5.2.2 Central Protection......................................................................................24 5.2.3 Passive Anti-islanding protection ...............................................................25 5.2.4 Overcurrent facility fault, overcurrent grid fault and earth fault protection.....25 5.2.5 Grid reverse power or Power Limit protection .............................................26 5.2.6 Synchronisation facilities ...........................................................................26