Short-circuit current suppression method considering unit start-stop and line switching
A short-circuit current, unit start-stop technology, applied in the field of electrical information, can solve problems such as non-optimal results, failure to consider the influence of unit short-circuit current, and inaccurate expressions
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[0204] In order to verify the validity and versatility of the proposed model and the accuracy of the explicit expression of short-circuit current, an example analysis is carried out using the IEEE30 node system. The fuel cost is 5$ / MBtu, the unit subtransient reactance ranges from 0.04 to 0.055, and the maximum number of line switching is 4. The following three calculation examples are set up.
[0205] Calculation example 1: Since the size of the load directly affects the short-circuit current level of the system, and to verify the adjustment effect of the unit start-stop on the short-circuit current, considering the system safety and economy of the comprehensive short-circuit current suppression method for unit start-stop and line switching, according to Three typical times of 5 o'clock, 11 o'clock and 21 o'clock in a day are respectively selected for heavy, medium and small loads, and four operating modes are considered for analysis and comparison, as follows:
[0206] Mode...
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