For use onsite Electricity produced for use for the purpose of the operation of the facility. This is all residual electricity produced at the facility and not delivered for outside use – i.e. all electricity produced at the terminals that is not delivered for outside use. Electricity production (Q) is equal to: The electricity produced by the electricity generating unit(s) as measured at the terminals minus Electricity supplied for use outside the operation of the facility that is not supplied to the network minus Electricity supplied to a transmission or distribution network measured at the network connection point. For use offsite, not supplied to network Electricity produced for use outside the operation of the facility other than supply to an electricity transmission or distribution network. Electricity production (Q) is equal to: Electricity supplied for use outside the facility that is not supplied to the network. For use offsite, supplied to network Electricity produced for use outside the operation of the facility for supply to an electricity transmission or distribution network. Electricity production (Q) is equal to: Electricity supplied to a transmission or distribution network measured at the network connection point. Measuring electricity production Produced electricity delivered to an electricity transmission or distribution network must be measured according to either Chapter 7 of the National Electricity Rules set out in the National Electricity (South Australia) Act 1996 or the metering requirements applicable to the region in which the facility is located. For the other electricity production, subsection 6.3(2) of the NGER Determination clarifies that the amount of electricity produced from the operation of the facility during the year must be evidenced by invoices, contractual arrangements or industry metering records. In practice: The electricity produced at the terminals should be measured and evidenced using metering per industry standard. For electricity delivered for use at another facility, the delivered electricity must be evidenced using invoices, contractual arrangements or industry metering records.
Figure 6 – Gas-fired power plant diagram Table 14 – Summary of emissions and energy from the gas power plant Process Point Reportable emissions Reportable energy production Reportable energy consumption Notes 1 ‘Natural gas distributed in a pipeline’ enters plant. None. None. None. Gas supply pipeline is outside of the facility boundary and hence leaks from the pipeline do not need to be reported. 2 Gas combustion. If generation unit < 30 MW or production < 50,000 MWh in the reporting year, emissions estimation can be made using default emission factors under method 1. Otherwise minimum method 2, and method 3 also available. Fuel combustion emissions. None. Electricity is not produced at this process point – these are produced at #4. ‘Natural gas distributed in a pipeline’ is consumed through combustion for the purpose of producing electricity. Refer section 4 of this guideline for estimating emissions from fuel combustion. Only one method for estimating emissions should be used for the single occurrence of the source in the case example.
In selecting an appropriate method, reporters should observe the restrictions for using a lower method from previous year in section 1.18 of the NGER Determination. 3 Direct measurement of carbon dioxide emissions (if using method 4). If direct measurement of emissions using method 4: Fuel combustion emissions. None. Energy consumption is reported at #2. 4 Electricity generation at turbine. None. None. ‘Electricity’ is produced from the turbine and generator, but is reported at #5-7 below. None. Electricity produced should be metered at the terminal directly after the turbine (refer section 7.3.1 of this guideline). 5 Own produced electricity consumed by facility. None. This is not a scope 2 emission, because direct emissions caused by facility discharged at (#3). Electricity produced ‘for use for the purpose of the operation of the facility’ – i.e. for ‘for use onsite’. Calculated as residual amount of #4 not delivered at #6 or #7. ‘Own produced electricity’ is consumed for use in own facility. Electricity consumed by the plant should be calculated as per section 7.3.1 of this guideline.
7 Electricity transferred to an electricity network. Electricity produced ‘for use outside the operation of the facility for supply to an electricity transmission or distribution network’. None. Electricity transferred to the electricity network should be metered at the network connection point by the distributor (refer section 7.3.1 of this guideline).