Identifying power output reduction in solar power plants using the Delfos platform

Discover how the Delfos platform quickly identified and resolved a power derating issue at a solar plant, preventing energy production losses of up to 10% and ensuring greater operational efficiency.

The Context

At a large solar power plant, an unexpected drop in energy output was observed from one of the inverters (Inverter No. 14). Although the equipment did not trigger any alarms or warnings, the plant's output was below expectations. Initially, the technical team was unable to identify the exact cause of the issue. The Delfos platform quickly detected that Inverter No. 14 was recording the highest temperature among all the units, pointing to possible operational power derating—an automatic reduction in power output caused by overheating. This phenomenon can result from ventilation system failures or adverse environmental conditions—situations common in outdoor installations.

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Actual Expected

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Inverters' internal temperature [°C]

16	46.66	49.30	50.36	49.25	47.36
15	47.52	49.74	51.48	50.42	48.49
14	53.69	55.74	57.10	55.31	53.50
13	52.85	55.60	56.15	55.25	53.73
12	49.36	52.25	52.25	51.31	50.61
11	50.15	53.35	52.97	52.28	51.67
10	48.31	50.31	51.70	50.65	48.44
9	50.46	53.45	53.50	52.68	51.95
8	47.60	50.71	50.62	50.04	49.21
7	48.95	51.56	51.64	51.25	49.71
6	48.65	51.60	51.32	51.44	50.03
5	48.08	50.24	50.76	50.40	48.64
4	49.93	52.36	53.37	52.50	51.38
3	48.72	51.30	52.00	51.34	49.87
2	49.01	51.49	52.38	51.53	50.30
1	50.03	51.58	53.95	52.80	50.92

2024-01-07

2024-01-08

2024-01-09

2024-01-10

2024-01-11

56 54 52 50 48

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Delfos KPIs

losses avoided/inverter

coverage of critical assets

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Solution:

Due to the continuous monitoring and intelligent analysis of Delfos, the derating was detected on the first day of the anomaly, avoiding significant energy losses. It is estimated that the energy impact could have reached 10% in the production of the affected inverter, depending on the level of limitation. With the rapid identification and corrective action suggested by the system, the operation team was able to mitigate the problem before it generated greater losses

Results:

Impact on Energy Production:

Potential production reduction: between 5% to 10% per affected inverter.
Response time: Detection on the first day of non-compliance.
Corrective action: Preventive maintenance in ventilation systems and operational adjustments.

The application of Delfos' intelligent monitoring system was crucial to quickly identify and solve the derating problem caused by the inverter overheating. This ensured greater operational efficiency and avoided revenue losses, demonstrating the value of advanced monitoring and preventive maintenance solutions in the operation of solar plants.

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Identifying power output reduction in solar power plants using the Delfos platform

The Context

Solution:

Results:

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