INTRODUCTION AND SUMMARY 1.1 Executive Summary The purpose of this limited study was to investigate six specific issues associated with interfacing a Satellite Power System (5 GW) with large (by present standards) terrestrial power pools to a depth sufficient to determine if certain interface problems and/or benefits exist and what future studies of these problems are required. The issues investigated and the conclusions reached are as follows: 1. Stability of Power Pools Containing a 5 GWe SPS Using present control methods, the power pools investigated in this study are unlikely to be able to maintain stable operation without shedding part of the load if the SPS shuts down unexpectedly. This might be a severe problem and further studies of (a) the likely magnitude of the problem, (b) the most co?t effective method of alleviating the problem are needed. 2. Extra Reserve Margin Required to Maintain the Reliability of Power Pools Containing a 5 GWe SPS The use of any type (SPS or conventional) of 5 GWe generator instead of five 1 GWe generators requires a significant increase in the power pool reserve margin if the system reliability is to be maintained; the cost of the extra capacity need not be excessively expensive. The problem is significant and deserves further study, but a solution is available at a reasonable cost. 3. Use of the SPS in Load Following Service (i.e. in two independent pools whose times of peak demand differ by three hours) The use of the SPS in this manner does not allow the economics of the SPS to be directly compared with the
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