Identification and Correction of Undue Limitation by PPC in a Solar Plant

Context

Did you know that the Power Plant Controller (PPC) can cause undue limitations in inverters? This type of limitation can occur due to faults in the controller's logic, transforming a limitation that should be momentary into a prolonged restriction, with a significant impact on energy production.

In the case analyzed, inverter #2.1 started operating with a power limitation of up to 10% around midday. This anomaly was identified automatically by Delfos' monitoring, which generated an alert on the Dashboard, allowing the problem to be investigated quickly.

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Identification and solution

In the operations center, it was found that the inverter was under an improper limitation applied by the PPC. This prolonged limitation was caused by an error in the control logic, which was supposed to apply the restriction instantaneously and momentarily.

The operations team, using Delfos' automatic notification, managed to correct the error on the same day, avoiding significant losses in energy production.

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Results

The fault detected would have caused a reduction in production of approximately 15 MWh per week, which corresponds to around 6% of the inverter's total expected production. Thanks to the rapid intervention made possible by Delfos' intelligent monitoring, this energy loss was avoided.

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Conclusion

Cases like this highlight the importance of proactive monitoring and automated notifications to maintain operational efficiency in solar plants. Delfos has proved essential in quickly identifying and correcting critical faults, guaranteeing maximum asset performance.

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Benefits:

• Detection of undue limitations with automatic alerts;
• Prevention of losses of up to 15 MWh per week;
• Reduction of impacts equivalent to 6% of total expected production;
• Improved reliability and efficiency in inverter operation.

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This case highlights how Delfos helps its customers mitigate operational failures and optimize production, ensuring greater return and reliability for solar plants.

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