where U dcmax is the maximum DC bus voltage of the converter, and ΔP min is the power difference between the generator and grid side when the dumping circuit is initiated to operate.
In order to validate the theoretical analysis result, Table 1 shows the relationship between the AC system voltage and the maximum harmonic content, THD in the bus voltage of the power grid.
In order to validate the theoretical analysis result, Table 3 shows the relationship between L n and the maximum harmonic content, THD in the bus voltage of the power grid.
Table 2 shows the relationship between the rated dc bus voltage of UPFC and the maximum harmonic content, THD in the bus voltage of the power grid.
The maximum percentage measurement errors have been assumed as: 1.5% (bus voltage and branch current magnitude measurements), 3% (power flow measurements) and 50% (pseudo-measurements for loads and DGs connecting to ADNs directly).
Table 1 Maximum harmonic content and THD under different AC system voltages AC system voltage (kV) Maximum harmonic content THD 10 1.73 3.98 35 0.05 0.11 110 0.10 0.23 220 0.05 0.11 500 0.02 0.05 2) Influence of rated dc bus voltage of UPFC For the same SM number, with the increase of the rated dc bus voltage of UPFC, the single SM's capacitor voltage would also increase.
The furthest DG RTU that is RTU n+1, assumes that the maximum voltage value of the feeder equals to its own DG bus voltage, then it estimates the minimum voltage value and reports to upstream RTU n.
Sev(St)_{v} = hbox{max} left( {frac{{T_{{{text{low}}v}} }}{{T_{vhbox{max} } }}} right) (4 where Tlowv is the time duration when the bus voltage decreases to 0.75 p.u., Tvmax is the maximum allowable time (generally equals to 1 s).
The rapid response of the dc bus voltage control, grid-side unit power factor control, a maximum capture of wind energy can be realized, using control design process of Hamilton realization.
Indeed, challenge is to adjust duty cycle according to actual power bus voltage when PV module voltage has to be constant, especially when Maximum Power Point is reached.
