COMMISSIONING - ADVANCED QUALITY ASSURANCE PROCEDURE (AQAP)

OBJECTIVE

The objective of an AQAP is to ensure the quality of the components and reduce the uncertainty associated with the operation of a photovoltaic power plant, minimizing the risks of the investment and optimizing the economic return of the project.

The uncertainty in the estimation of the energy that will produce a photovoltaic project influences its economic viability in two different phases. In the initial phase, determining the financing conditions through parameters such as EP90 or EP99. In the operation phase, limiting the ability to detect faults and, with it, to optimize the generation of energy. The realization of an AQAP allows to reduce the uncertainty and, with it, adjust the estimates and improve the return on the investment.

PV plant static modules
Statis photovoltaics modules

PROCEDURE

  • Determination of the STC power of the generator.
  • Measurement of the inverter’s efficiency.
  • Analysis of the AC signal’s quality and power control strategies.
  • I-V curve measurements at module, array and generator levels (up to 2 MW).
  • Visual inspection.
  • Thermographic inspection: modules, combiner boxes, inverters...
  • Production capability test.
  • Quality indexes calculation (PR, PRSTC,...) and energetic availability.
  • Losses breakdown: dust, shadowing, low irradiance, temperature, wiring, grid constrictions...
  • Recalibration of measurement sensors.
  • Revision of the monitoring system.
  • Historic data analysis.
  • Reclaim management.

APPLIED REFERENCES

  • IEC– 60904-1; IEC –61829;
    IEC –60891; IEC –62446;
    IEC –61724.