When applying to United Energy to connect your embedded generation system, there are two applications, 5 and 5A.  Only the shorter application, 5A, is needed when the system is below 5MW, otherwise application 5 must be filled out.  This guide is for application 5A.

Parts 1 and 2 ask the applicant for the contact details of the owner of the system and also on the person filling out the application.  Part 3 of the application asks many miscellaneous questions about the installation.  The guide to each of these questions can be seen below.

  1. Does the Generating unit seek to provide non-network support for published network constraints?
    • Do you plan on offering assistance to the network in reducing the load on the network?
  2. Is the Generating unit exempt from AEMO registration?
    • An exempted generator is typically below 5MW and non-market.
  3. Connection Applicant is to be aware of generator license obligation as part of the Essential Services Commission compliance?
    • Anyone supplying or selling energy in Victoria must hold a license granted by ESC or be exempt from this requirement.
  4. Is the Generating unit to be Market or Non-Market?
    • Market – A generator whose sent out output is not purchased in its entirety by a local retailer or by a customer located at the same network connection point.
    • Non-Market – A generator whose sent out output is purchased in its entirety by a local retailer or by a customer located at the same network connection point.
  5. Is the Generating unit to be Scheduled, Semi-Scheduled, or Non-Scheduled dispatch?
    • Scheduled – A generating unit which has a nameplate rating of 30 MW or greater or is a part of a group of generating units connected at a common connection point with a combined nameplate rating of 30 MW or greater
    • Semi-Scheduled – A generating unit which has a nameplate rating of 30 MW or greater is a part of a group of generating units connected at a common connection point with a combined nameplate rated of 30 MW or greater where the output of the generating unit is intermittent
    • Non-Scheduled – A generating unit with a nameplate rating of less than 30 MW or a group of generating units connected to common connection point with a combined nameplate rating of less than 30 MW. May have either physical or technical attributes such that it is not practicable for it to participate in central dispatch.
  6. Expected operating hours:
    • Fill in the expected hours and days of operation during a given week.
  7. Expected energy production per annum:
    • Fill in the expected MWh produced per year of operation.
  8. Calculated or measured facility load demand during normal working hours:
    • Fill in the load of the facility during a typical working day in either kW or kVA.
  9. Estimated facility load to be offset via embedded generator during facility normal working hours:
    • Fill in the estimated offset of the facility load during a typical working day in either kW or kVA.  This would be the measured typical facility load minus the estimated energy production of the generation system for one day.
  10. Export of excess generated power?
    • State yes or no for whether or not you will be exporting excess power from the generation system.
  11. Maximum net power exported over meter measuring interval based on calculated or measured:
    • This should reflect the maximum generator export during the facility’s minimum self-consumption period in either kW or kVA.
  12. Confirm presence of any disturbing load/system with potential to disturb the voltage waveform and or power quality:
    • Some examples of disturbing loads are PFC, DOL, motor, rectifier, or another generator.  If there is a disturbing system, you must specify what it is and its capacity.
  13. Purpose of Generating unit and envisaged operating date?
    • For what reason do you want the generation system and when do you plan on having it begin operating?
  14. The Connection Applicant has/shall address all environmental compliance requirements applicable for the embedded generator installation?
    • Make sure you have looked into the environmental requirements for your area.

 

Part 4 of the application inquires into various things about the small generator aggregator framework.  The guide to this section can be seen below.

  1. Is the installation to be registered with AEMO as a Small Generator Aggregator (SGA)?
    • Must register as an SGA in order to sell electricity directly to the market
  2. If yes to SGA, does metering comply?
    • Support supporting documentation to show that your metering complies with being an SGA.
  3. If registered to SGA, provide generator NMI:
  4. If registered to SGA, provide load NMI:

 

Part 5 of the application inquires into various things about the inverter generating plant.  The guide to this section can be seen below.

  1. Address of generator installation:
  2. Proposed connection point and NMI number:
  3. Energy source / fuel:
    • Solar, Wind, Fuel Cell, Natural Gas, etc.
  4. Energy storage to be included?
    • Will a battery be used?
  5. Generating plant or technology type proposed:
    • Solar Photovoltaic, Wind Turbine, Hydro Turbine, etc.
  6. Inverter AS4777 compliant?
  7. Number of generating units/inverters:
    • This includes any battery inverters.
  8. Nominal voltage of generating unit/inverter:
  9. Rating of each unit/inverter:
    • Can be in either kW or kVA.
  10. Power factor of generating unit/inverter to be operated:
  11. Number of panels or turbines:
  12. Max rating of each panel or turbine:
  13. Maximum total power generation of installation:
    • Can be in either kW or kVA.
  14. Inverter Over/Under voltage protection settings and trip time:
  15. Inverter Over/Under frequency protection settings and trip time:
  16. Additional protection in the form of inverter independent protection:
    • overcurrent, anti-islanding, phase failure detection, etc.

 

Part 6 of the application inquires into various things about the overall generation operation.  The guide to this section can be seen below.

  1. Are the main and individual generator isolators/switches lockable?
    • Can the main and individual generator switches be locked so that they can not be easily turned on and off?
  2. Is there a single or a common point of isolation for all generation? If not, please provide the Generator Isolation Procedure with the Preliminary Enquiry Form.
    • UE prefers if there is a single or common point of isolation for all generation.
  3. What remote monitoring of the generation system will be implemented? Please expand on how in the Generator Functional Statement.

 

Part 7 of the application inquires into various things about the installation main switchgear and components.  The questions can be seen below.  All of the information should be able to be found with the main switchgear and components you are using.

  1. Manufacturer and model number:
  2. Main circuit breaker nominal current rating:
  3. Rated short time withstand current rating:
  4. Rated short time withstand current maximum time:

 

Part 8 of the application inquires into various things about the power quality.  The guide to this section can be seen below.

  1. Inverter THD level and installation design of load balancing complies with Australian Standards, Electrical Distribution Code, Victorian Services and Installation Rule.
    • Make sure the inverters used are installed in compliance with all of the above standards.
  2. Submit installation voltage rise report:
    • A report on how much the voltage will rise after the generation system is installed is required.

 

Part 9 of the application inquires into various things about the metering.  The guide to this section can be seen below.

  1. Bi-directional metering required to be upgraded to facilitate the generator connection?
    • Bi-directional metering is when the meter measures the electricity flow in both directions so that it meters electricity sent to the grid and received from the grid.
  2. Who is the Customer’s Retailer?
  3. Hast the Retailer been notified of the new generation?
  4. Meter class / classification:

 

Part 10 of the application inquires into various things about the installation and earthing standards.  The guide to this section can be seen below.

  1. Embedded generator installation will comply with all current and relevant Australian Standards and the Victorian SIR:
  2. State the earthing standards to be employed for embedded generator installation:
    • AS3000, AS5033, AS2067, etc.

 

Parts 11 and 12 of the application requests documentation for the embedded generation system plans and commissioning.  The specific items needed for each of the documents are listed on the application. The list of these documents can be seen below:

  1. Single Line Diagram
  2. Aerial View Site Layout
  3. Protection, control design and operating report
  4. Voltage Rise Calculation
  5. Generation System Functional Statement
  6. Commissioning Plan

 

Part 13 of the application asks for information to be published on the UE website.  The guide to this section can be seen below.

  1. Technology of generating unit and its make and model:
    • Synchronous generation unit, induction generator, photovoltaic array, etc.
  2. Maximum power generation capacity of all embedded generation units comprised in the relevant generating system:
  3. Contribution to fault levels:
  4. The size and rating of the relevant transformer:
  5. A SLD of the connection arrangement:
  6. Protection systems and communication systems:
  7. Voltage control, power factor control and/or reactive power capability:
  8. Details specific to the location of a facility connected to the network that are relevent to questions 1-7:

 

The final section to be filled out is based on whether your system is inverter based or not.  This section is fairly self-explanatory or repeated information from the questions above.

Feel free to contact us with any additional questions that you have about your connection application.