Reduction of Losses due to Conversion Inefficiency: 10 MWh/mo Recovered

In solar power plants, efficiency losses in the conversion of DC to AC energy can go unnoticed, directly impacting energy production. In a plant monitored by Delfos, one of the inverters (IN-7.1) was operating at 1.5% lower efficiency than the others, representing an anomaly with significant loss potential. This type of fault is difficult to detect without advanced analysis, as the equipment continues to operate, but with degraded performance.

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Implemented Solution

Using the Delfos analysis modules, it was possible to identify a deviation in the behavior of the IN-7.1 inverter in relation to the others in the plant.
- The Analyses and Energy Losses modules signaled a persistent inefficiency in the DC/AC conversion.
- The analysis pointed to the DC Link component as the possible point of failure.
The field team was called in and, after inspection, confirmed a calibration error in the converter voltage, which was corrected by adjusting the voltage gain.

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Achieved Results

After the adjustment, the IN-7.1 inverter's operating data converged with the others, as shown in the graphs below. The conversion efficiency was normalized, eliminating the deviation that caused hidden losses.

Recovered production: 10 MWh/month
Root cause identified: Calibration failure in the DC Link
Targeted intervention: Voltage gain adjustment

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Conclusion

This case illustrates how Delfos goes beyond conventional monitoring, identifying hidden flaws that directly impact asset performance. Without the platform, this loss would have been perpetuated, reducing the plant's financial return.
Delfos' analytical intelligence enabled quick and precise action, guaranteeing the maximum operational efficiency of the inverters and protecting the project's revenue.

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- 10 MWh/month of recovered production
- 1.5% conversion efficiency recovered
- 100% of faults resolved with one-off intervention after remote diagnosis

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