Electricity Transmission Regulations 1996

In this subregulation and subregulation (2) —

the excess amount in respect of an entry point for a half hour is equal to —

the average aggregate rate (in kW) at which the generating units connected at the entry point transferred electricity to the electricity transmission network during that half hour;

minus

the aggregate of the declared sent‑out capacity figures (in kW) for those generating units,

but if the result of this calculation is negative, then the excess amount in respect of the entry point for the half hour is zero;

if the excess amount in respect of an entry point for a half hour is more than zero, then an excess period in respect of the entry point commences at the start of that half hour, except if that half hour already falls within an excess period in respect of the entry point; and

each excess period in respect of an entry point includes 336 half hours.

If an excess period in respect of a user’s entry point commences during a month, then the excess network usage charge payable by the user in respect of the entry point for the month is determined by applying the following formula:

where —

ENUC (in $) is the excess network usage charge in respect of the entry point for the month;

E_i (in kW) is the highest excess amount for any of the half hours which fall within excess period_i;

USF (in $/kW) is the use of system fee in respect of the entry point determined in accordance with the user’s access agreement;

EF (a rate) is the excess network usage factor set out in the fee schedule for the financial year in which the month falls;

the variable “i” represents an excess period in respect of the entry point which commences during the month;

the variable “n” represents the number of excess periods in respect of the entry point which commence during the month.

In this subregulation and subregulation (4) —

the excess rate in respect of an exit point for a half hour is equal to —

the average rate (in kW) at which electricity is transferred from the electricity transmission network at the exit point during that half hour;

minus

the contract maximum demand for the exit point,

but, if the result of this calculation is negative, then the excess rate in respect of the exit point for the half hour is zero;

if the excess rate in respect of an exit point for a half hour is more than zero, then an excess demand period in respect of the exit point commences at the start of that half hour, except if that half hour already falls within an excess demand period in respect of the exit point; and

each excess demand period in respect of an exit point includes 336 half hours.

If an excess demand period in respect of a user’s exit point commences during a month, then the excess network usage charge payable by the user in respect of the exit point for the month is determined by applying the following formula:

where —

ENUC (in $) is the excess network usage charge in respect of the exit point for the month;

E_i (in kW) is the highest excess rate for any of the half hours which fall within excess demand period_i;

USF (in $/kW) is the use of system fee in respect of the exit point determined in accordance with the user’s access agreement;

CSF (in $/kW) is the common service fee determined in accordance with the user’s access agreement;

EF (a rate) is the excess network usage factor set out in the fee schedule for the financial year in which the month falls;

the variable “i” represents an excess demand period in respect of the exit point which commences during the month;

the variable “n” represents the number of excess demand periods in respect of the exit point which commence during the month.

[Regulation 24 amended: Gazette 28 Dec 2001 p. 6719; 22 Jun 2004 p. 2167; 25 Aug 2006 p. 3499.]