Photovoltaic revamping: REPOWER chooses MRP

MRP assisted Repower Renewable (Repower Group) as technical advisor in the photovoltaic revamping and repowering of 13 PV systems in Italy for a total power of over 23 MWp.

The contract assignment is divided into 3 distinct phases, which involved the various MRP teams:

• Phase 1: assets evaluation
• Phase 2: operations optimization
• Phase 3: inspection & tests

 

 

The MRP phases in photovoltaic revamping and repowering projects

Phase 1: assets evaluation

The analysis of Repower’s plants identified the interventions to be carried out, with a preliminary assessment of the costs / benefits and the technical feasibility for:

• revamping:restoration of the full functionality of the system, for the original power section, with bifacial modules
• repowering: installation of a new section of the plant intended for the production and sale of energy to the grid, often using the surface and / or the structures freed thanks to the higher efficiency of the new photovoltaic modules installed in the revamping.

In particular, thanks to over 20 years experience in the sector, MRP’s activity was focused on the validation tests of the technology to choose for the revamping and  repowering, with the selection of different suppliers and technologies of modules and inverters through  measurements and active monitoring in the field.

Phase 2: operations optimization

The subsequent study of the structures and the evaluation of different system configurations made it possible to optimize the interventions to be performed, considering the following parameters:

• unit power of the modules to be installled
• physical dimensions and fixing systems
• string configuration (voltages / currents with inverter)
• detailed technical choices in the EPC  executive project

Phase 3: inspection & tests

Upon arrival of the modules at the plants sites, the MRP specialists carried out the inspections according to the internal procedures for acceptance. Once the module and inverter replacement interventions were completed, the MRP verification team performed the analysis with EL electroluminescence technique on 100% of the installed modules, allowing to identify:

• defects in the supplied modules
• any errors in the arrangement, wiring or installation of the strings

A point from scratch of the systems was thus obtained, with a complete and updated situation of the real operating status of the DC side of the interventions performed, also essential for any future diagnosis of the system or damage from hail or atmospheric events.

 

 

Photovoltaic revamping: bifacial modules for excellence agrovoltaic

We want to offer you some videos regarding to one of the intervention sites: the first refers to the original construction of the plant in 2013, and the second refers to the revamping and repowering operations by the selected EPC Esapro.

Article by Giovanni Guiotto – MRP Srl

Gennaio 2022