Fig. 5. Grid load in the Federal Republic of Germany on January 16, 1980 (peak load: 51,700 MW). Figure 7 shows the load curve of a March day in 1980. The loss of 5000 MW power output at an average load of approximately 39,000 MW (value: Federal Republic of Germany, March 1980 at midnight) presents not a simple, however, solvable task for the control stations. At first, these outages happen during the night periods and thus at weak load times and additionally they are precisely foreseeable and can thus be scheduled. There are a number of bridging measures possible: 1. During these times of the year in general there is sufficient thermal power plant capacity available (the day time peak load in March 1980 amounted to approximately 49,000 MW, i.e., approximately 10,000 MW more than at night time). 2. Through disconnecting certain consumers, e.g., of night storage heating units via centralized ripple control systems, an additional reduction of the load during the outage times can be effected. 3. The two times 42 days may be utilized for the inspection of the energy satellite, i.e., the power output is not fed into the grid during the total time. The remaining yearly utilization hours (6744 h/«) still achieve the same amount as those from brown coal or nuclear power plants.
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