Tap selection strategy of phase-shifting transformer secondary winding under unequal tap phase voltages
A technology of phase-shifting transformer and secondary winding, which is applied in the direction of AC network voltage adjustment, flexible AC transmission system, etc.
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[0054] 1. The tap equalizes the phase voltage
[0055] If there are M taps in the secondary winding of each phase of the ST, and the M taps equally divide the phase voltage, then there are (M+1) output voltages in this phase. When M is equal to 1, the output point voltage position that can be compensated by combining ST through the tap setting is as follows: figure 2 shown. For different M values, the calculated number of voltage points N1 that can be compensated can be expressed as:
[0056] N 1 = 1 + Σ i = 1 M + 1 6 i - - - ( 1 )
[0057] Table 1 shows the relationship between the number of taps M and the number of voltage vectors N1 that can be compensated by the ST in the case of e...
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