History

There are two balancing prices determined by the IMO:

The Provisional Balancing Price, which is the dollar per MWh price calculated in accordance with clause 7A.3.8(b).
The Final Balancing Price, which is the dollar per MWh price calculated in accordance with clause 7A.3.10.

The balancing price for a given Trading Interval is calculated on the basis of the STEM combined supply curves of all Market Generators and the real-time effective demand for that Trading Interval.

Please note that the Balancing Quantity is calculated 2 days after the relevant trading day and is dependant on STEM trading results and system load information. The Balancing data is an estimate based on data provided by other parties at the time and may therefore be subject to change.

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Trading Day	Hour of Day	Trading Interval	MCAP Price per MWh	UDAP Price per MWh	DDAP Price per MWh	Reason Code	Scheduled System Load MWh	Relevant Quantity MWh	Balancing Quantity MWh
Administered Balancing Prices (SWIS) (Data Extraction from WEMS occurred at Dec 10, 2009 02:35:04 PM)
08/12/2009	8	1	24.87	12.44	32.33	Recalculated	1044.728	1011.771	-32.95
08/12/2009	8	2	34.07	17.04	44.29	Recalculated	1053.051	1052.578	-0.472
08/12/2009	9	1	34.04	17.02	44.25	Recalculated	1064.571	1086.023	21.451
08/12/2009	9	2	33.99	17	44.19	Recalculated	1082.583	1098.426	15.842
08/12/2009	10	1	33.94	16.97	44.12	Recalculated	1103.491	1105.355	1.8640
08/12/2009	10	2	33.91	16.96	44.08	Recalculated	1121.974	1124.219	2.2450
08/12/2009	11	1	33.87	16.93	44.03	Recalculated	1135.4	1141.239	5.8389
08/12/2009	11	2	33.86	16.93	44.02	Recalculated	1145.832	1149.404	3.5719
08/12/2009	12	1	33.84	16.92	43.99	Recalculated	1164.341	1134.052	-30.28
08/12/2009	12	2	37.33	18.67	48.53	Recalculated	1190.119	1129.025	-61.09
08/12/2009	13	1	37.13	18.57	48.27	Recalculated	1212.556	1137.241	-75.31
08/12/2009	13	2	24.4	12.2	31.72	Recalculated	1232.426	1127.354	-105.0
08/12/2009	14	1	24.33	12.17	31.63	Recalculated	1250.544	1127.324	-123.2
08/12/2009	14	2	24.33	12.17	31.63	Recalculated	1262.684	1123.301	-139.3
08/12/2009	15	1	24.27	12.14	31.55	Recalculated	1269.871	1119.849	-150.0
08/12/2009	15	2	22.3	11.15	28.99	Recalculated	1259.698	1117.684	-142.0
08/12/2009	16	1	20.36	10.18	26.47	Recalculated	1236.45	1115.783	-120.6
08/12/2009	16	2	18.42	9.21	23.95	Recalculated	1213.231	1101.474	-111.7
08/12/2009	17	1	16.47	8.24	21.41	Recalculated	1201.406	1085.115	-116.2
08/12/2009	17	2	16.34	8.17	21.24	Recalculated	1194.055	1074.679	-119.3
08/12/2009	18	1	16.43	8.22	21.36	Recalculated	1199.19	1043.6	-155.5
08/12/2009	18	2	16.39	8.2	21.31	Recalculated	1191.021	1030.628	-160.3
08/12/2009	19	1	14.28	7.14	18.56	Recalculated	1169.787	1047.67	-122.1
08/12/2009	19	2	12.08	6.04	15.7	Recalculated	1155.669	1060.942	-94.72
08/12/2009	20	1	5.83	2.92	7.58	Recalculated	1136.913	1045.515	-91.39
08/12/2009	20	2	-0.36	-0.18	-0.47	Recalculated	1124.564	1024.557	-100.0
08/12/2009	21	1	-0.9	-0.45	-1.17	Recalculated	1094.409	986.167	-108.2
08/12/2009	21	2	15.92	7.96	20.7	Recalculated	1027.004	940.282	-86.72
08/12/2009	22	1	23.8	0	26.18	Recalculated	949.717	891.88	-57.83
08/12/2009	22	2	31.04	0	34.14	Recalculated	888.877	846.155	-42.72
08/12/2009	23	1	34	0	37.4	Recalculated	820.894	806.938	-13.95
08/12/2009	23	2	32.62	0	35.88	Recalculated	789.361	781.425	-7.936
08/12/2009	0	1	23.19	0	25.51	Recalculated	776.704	759.197	-17.50
08/12/2009	0	2	18	0	19.8	Recalculated	759.533	744.467	-15.06
08/12/2009	1	1	18	0	19.8	Recalculated	751.717	732.109	-19.60
08/12/2009	1	2	15.02	0	16.52	Recalculated	746.524	718.851	-27.67
08/12/2009	2	1	15.02	0	16.52	Recalculated	744.975	705.167	-39.80
08/12/2009	2	2	15.02	0	16.52	Recalculated	739.735	708.451	-31.28
08/12/2009	3	1	14.49	0	15.94	Recalculated	743.929	704.665	-39.26
08/12/2009	3	2	12.43	0	13.67	Recalculated	754.922	697.137	-57.78
08/12/2009	4	1	14.39	0	15.83	Recalculated	765.58	714.352	-51.22
08/12/2009	4	2	18	0	19.8	Recalculated	769.495	734.832	-34.66
08/12/2009	5	1	23.65	0	26.01	Recalculated	771.59	756.576	-15.01
08/12/2009	5	2	30.79	0	33.87	Recalculated	808.094	787.691	-20.40
08/12/2009	6	1	29.62	0	32.58	Recalculated	908.14	849.322	-58.81
08/12/2009	6	2	24.89	0	27.38	Recalculated	983.516	908.226	-75.28
08/12/2009	7	1	25.11	0	27.62	Recalculated	1052.774	989.049	-63.72
08/12/2009	7	2	25.07	0	27.58	Recalculated	1086.768	1037.569	-49.19