German Renewable Energies Act
Figure 2: Trade Volumes in the Phelix Hourly Auction (first quarter of 2009 & 2010)
Source: EEX
Figure 3: Phelix Day Base & Peak Depending on Forecast Feed-In by Wind Energy Plants
since January. Monitoring trading participants‘ trading behaviour is part of the responsibilities of the Market Surveillance Office of EPEX Spot. For this reason, the transmission system operators’ trading behaviour is not analysed in this article. Nevertheless, the effects of forecast and actual feed-ins from renewable energies can be evaluated on the basis of data which is publicly available. The influence of the feed-in from wind energy plants (WEP) is considered in the example described below, since these account for by far the largest share of the feed-in from renewable energies and, in addition, comprehensive data on forecasts and actual feed-ins is publicly available for this class of generation plant – see the EEX Transparency Platform:
www.transparency.eex.com Figure 3 shows the average values of the Phelix
hourly auction (Phelix Day Base and Phelix Day Peak) as against the forecast daily WEP feed-in, which had to be marketed as an unlimited order on the day-ahead market for every delivery day.
... wind energy plants (WEP) ... account for by far the largest share of the feed-in from renewables
Source: EEX
Figure 4: Trade Volume in Phelix Hourly Auction depending on Forecast Feed-In by Wind Energy Plants
Generally, prices established on the spot market
decreased with increasing forecast WEP feed- in volumes during the period. Since prices are influenced by a large number of other factors (in addition to the WEP forecast) the connection in Figure 3 is not clear (i.e. the values shown are not adjusted for the considerable influence of the expected load. For example, data point 100 GWh/€20 corresponds to 1 January 2010 with low load, which is usual for a holiday). The connection between the forecast daily WEP
feed-in volume and the trade volume on the day- ahead market is shown in Figure 4. In this case too, every data point corresponds to a delivery day during the first quarter of 2010. As expected, the trade volume increases with
Source: EEX 86
increasing forecast WEP feed-in volumes. However, a formal connection between the WEP forecast and the trade volume cannot be established on account
worldPower 2010
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140 |
Page 141 |
Page 142 |
Page 143 |
Page 144 |
Page 145 |
Page 146 |
Page 147 |
Page 148