On a Real Australian LV Feeder, Rooftop-PV Export Magnitude Sets Over-Voltage
Abstract
This paper constitutes the second of four publications establishing the 5-Factor Decision Framework. While the first study (European MV networks) demonstrated that operating state dictates grid limits, this study proves the opposite holds true at the low-voltage tier. Using empirical smart-meter telemetry from a 500 kVA Australian feeder (CSIRO Network R), this paper demonstrates that localized rooftop solar export magnitude is the overwhelming physical driver of voltage rise ($r = 0.90$), overriding the background operating state.
Methodology
Content currently under peer review.
- Data Ingestion: Analysis of high-resolution smart meter telemetry across a densely populated Australian residential feeder.
- Correlation Profiling: Pearson and Spearman rank analyses isolating generation magnitude (P-inj) versus base load consumption (P-load).
- Physical Modeling: Resistive line impedance profiling ($R \gg X$) to prove why active power export natively drives $\Delta V > 0$.
Expected Outcomes
By empirically isolating the generation-driven over-voltage effect, this research solidifies Factor 1 (Stress Direction) and Factor 4 (Seasonality) of the decision framework. It provides Distribution System Operators (DSOs) with the mathematical justification required to implement dynamic export limits rather than arbitrary static curtailment.