Figure 31 VAr and PF characteristics of a sample D-PV inverter which doesn’t show any V-VAr response, and its PF behaviour changes across different real power levels
Table IX summarizes the percentage of D-PV inverters according to their V-VAr response and PF characteristics seen in the studied Solar Analytics data set. Table IX Percentage of D-PV inverters with different V-VAr response and PF characteristics
Percentage of DPV inverters (%)
Reference VVAr curves (Figure 27)
No V-VAr response, unity PF (Figure 28)
No V-VAr response, increasing PF with real power (Figure 29)
No V-VAr response, decreasing PF with real power (Figure 30)
Other (Figure 31)
0.5
80
15
2.5
2
6.3.3 Volt-var curtailment (real case) This section presents the V-VAr curtailment results from the analysis of real operational data. The results are first presented for BESS from AGL VPP dataset followed by D-PV systems form Solar Analytics dataset.
6.3.3.1 BESS V-VAr Curtailment (AGL VPP dataset) Before presenting the BESS V-VAr curtailment results, Figure 33 demonstrates an example case for curtailment from a sample site. Around 3:00 am (circled in red), the BESS absorbs high VArs and the real discharge power is curtailed as the BESS VA reaches its rated capacity of 5 kVA.
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