The total cost of ancillary services for the week was $569,000 or 0.6 per cent of the total turnover in the energy market. The cost for lower 5 minute services was up by nearly $200,000 on the previous week as a result of a network outage in Victoria for the latter half of the week. The cost for ancillary services in Tasmanian totalled $130,000 or 0.9 per cent of the energy market turnover for that region.

Regulation prices spiked for one despatch interval to $10,000/MW in Tasmania on Wednesday evening when every unit with an offer for regulation was inadvertently made unavailable.

Figure 4: volume weighted average frequency control ancillary service prices (excluding Tasmania)

	Raise				Lower
	6 sec	60 sec	5 min	Reg	6 sec	60 sec	5 min	Reg
Last week($/MW)	1.31	0.42	0.68	0.92	0.23	1.44	4.96	1.62
Previous week ($/MW)	1.20	0.45	0.70	0.86	0.22	0.24	0.70	1.52
Last quarter ($/MW)	2.36	1.50	1.41	1.32	2.28	2.13	3.48	1.70
Market cost($1000s)	64	20	44	22	2	39	210	38
% of energy market	0.08	0.03	0.06	0.03	0.00	0.05	0.28	0.05

Figure 5: Tasmanian volume weighted average frequency control ancillary service prices

	Raise				Lower
	6 sec	60 sec	5 min	Reg	6 sec	60 sec	5 min	Reg
Last week($/MW)	1.63	0.48	0.78	1.34	0.20	0.22	0.67	1.46
Previous week ($/MW)	2.94	0.57	0.79	1.52	0.26	0.31	1.25	1.62
Last quarter ($/MW)	2.36	1.50	1.41	1.32	2.28	2.13	3.48	1.70
Market cost($1000s)	82	24	52	32	1	1	14	34
% of energy market	0.07	0.02	0.04	0.03	0.00	0.00	0.01	0.03

Figure 6 shows the daily breakdown of price for each frequency control ancillary service. It also includes the cost of services sourced locally and in Tasmania.

Figure 6: daily frequency control ancillary service prices

Figure 7 shows the weekly participation in each of the ancillary service markets on a regional basis.

Figure 7: regional participation in ancillary services

Figures 8 and 9 show 30-minute prices for each of the ancillary services.

Figure 8: prices for raise services

Figure 9: prices for lower services

Figures 10 and 11 show the 30-minute Tasmanian price for each or the ancillary services.

Figure 10: Tasmanian prices for raise services

Figure 11: Tasmanian prices for lower services

Figures 12 and 13 present for both raise and lower services the requirement for each service over the week.

Figure 12: raise requirements

Figure 13: lower requirements

Figures 14 and 15 present for both raise and lower services the Tasmanian requirement for each service over the week.

Figure 14: Tasmanian raise requirements

Figure 15: Tasmanian lower requirements