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۱A NEW METHOD FOR THE FULL EXPLOTATION OF ELECTRICAL LINES
نویسنده(ها): ، ،
اطلاعات انتشار: هشتمین کنفرانس بین المللی برق، سال
تعداد صفحات: ۱۲
Electrical power systems face a continuing growth of load demand, which is going closer and closer to the capability of the system. In order to enhance system capability, since installing new facilities is nowadays difficult, it can be useful to critically and carefully re–examine the limits the capability itself depends on. In the paper, the limiting conditions on current carrying capability of electrical lines are examined; a new method, based on recursive parameter estimation, is proposed for on–line computation of line capacity, which is up–to–dated as heat exchange conditions vary. Test on simulated data are made and method performance is analysed.<\div>

۲SOME CONSIDERATIONS ON OPF AND AGC CO–ORDINATION
نویسنده(ها): ، ،
اطلاعات انتشار: هشتمین کنفرانس بین المللی برق، سال
تعداد صفحات: ۱۲
The control of electric power systems is structured in hierarchical levels. At the optimising level, the value of control variables which optimises some economical criterion is computed, while all constraints are met and a foreseen load is supplied. At the directcontrol level, setpoints for active generated powers and for generating voltagesare determined so as to track the load demand that rapidly changes. The aim of our studyis to find a methodology to compare different choices of time frames in which thecontrol actions are executed, while stressing the need for a close co–ordination between the different levels of control. The paper tries to highlight the effects of the choice ofoptimising action solving frequency and of co–ordination between optimising and direct control levels on operational costs and on smoothness of control action.<\div>
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