How the audit is conducted and what the service of photovoltaic stations consists of?

The performance of the solar station depends on timely audit and service. It consists of an inspection of the station by Unisolar experts, providing advice on malfunctions, quick repairs or replacement of equipment to ensure smooth operation. 

What types of solar power plant audits exist?

 Unisolar specialists conduct technical audits of FES in accordance with the customer’s request. It can be planned, emergency or investment.

The scheduled audit takes place as a part of the annual maintenance of the solar station and its result is an analysis of the actual situation. After diagnosing inverter equipment, photovoltaic modules, power equipment and cable networks, the engineer provides recommendations for corrective action. This can be or replacing fuses or cleaning modules. It is the scheduled technical audit that helps to keep the FES in good condition and anticipate possible risks in the operation of the station.

An emergency audit is necessary in case of urgent determination of the causes of damage and elimination of urgent problems at the solar station. Following such an audit, service engineers also provide guidance on corrective action to avoid a recurrence.

 The investment audit is conducted for a comprehensive analysis of the solar power plant for compliance with the standards of maintenance and safety of the facility. In this type of technical audit, experts check the inverter equipment, solar modules, internal networks for compliance with the design and estimate documentation. The investment audit differs from the planned one in that it creates an additional financial model and new financial forecasts for the operation of the station. It allows investors to make decisions about buying a solar station and owners to evaluate their assets objectively.

What is an aerothermographic examination of a solar power plant?

 Photovoltaic modules are tested with the help of the drone. On the interactive map after shooting, the customer sees all existing and potential problems in the field. Thanks to special software, the nature and number of defects, the level of criticality and the causes of their occurrence are revealed. After receiving a complete picture of the aerothermographic survey of the station, Unisolar experts form an approximate amount of monetary losses from existing defects on solar modules. Detected defects can be covered by an established warranty. 

What is the operational and operational service?

Timely service of the solar power plant increases its productivity and reduces repair costs. After all, the return on investment depends on both the proper installation of equipment and its maintenance. Therefore, it is essential to monitor the operation of all FES equipment through a monitoring system and maintain the main indicators of the station. The results of the maintenance of the solar station and the shortcomings are contained in the monthly and quarterly reports. This helps to keep track of the work schedule and anticipate further faults. 

The obligatory stage of complex maintenance of the solar power plant is to check the equipment of direct and alternating current with voltage up to 1000 V. It includes diagnostics of condition of cables and panels for damage or overheating, measurement of earthing resistance. Experts also audit the contact connections of the current-carrying parts of the inverter. When servicing equipment with a voltage above 1000 V (transformers, moving parts of high-voltage equipment), a visual inspection of the solar station for mechanical damage is performed, insulation is checked, and grounding resistance is measured. 

During operational and operational maintenance relay protection devices, a board of own needs, work of the AVR scheme and emergency lighting are diagnosed. In case of defects, current repairs of disconnectors, grounding knives and 10 kV switches are carried out.

 Comprehensive service of the solar power plant is work on protection, cleaning of the photomodule (FEM) and maintenance of the FES territory. This includes a visual inspection of the integrity of buildings and structures, station fences, work on cleaning photovoltaic modules from snow, mowing the grass on the territory. Comprehensive maintenance also includes testing of automation devices, alarms, communications equipment, verification of backup equipment and even water supply for the needs of station staff. Particular attention is paid to the safety of personnel when testing personal protective equipment (dielectric gloves, mats, rods, voltage indicators) and checking fire extinguishers.

Why to hold dispatch of  a solar power plant?

The solar power plant monitoring system is connected primarily for the purpose of prompt detection and elimination of problems that can reduce the plant’s productivity. Such operational control of electricity generation in real time notifies and processes alarms at the station. The technological parameters of the solar station are available via an Internet browser on PCs and mobile devices (Android or iOS) from anywhere in the world. You can look at the statistics of the station by various parameters for any period of time, which is important data of business intelligence for the owner of a solar power plant.

 Scheduling a solar power plant reduces system maintenance and repair costs. After all, it is possible to monitor pre-emergency conditions of equipment and quickly make decisions based on the data obtained.

What about regarding generation forecasting?

In Ukraine, new legislation (Law 810-IX) increases the requirements for solar energy forecasting, especially for the day ahead. All RES facilities are responsible for deviating hourly production forecasts from actual hourly production. For solar power plants over 1 MW, this is 50% of the cost of resolving imbalances by the  Guaranteed Buyer  in the event of a deviation of more than 5%. Qualitative forecasts of electricity generation allow SES   producers to manage the variable productivity of stations. They depend on the position of the sun in the sky, the length of daylight, clouds, precipitation. To obtain data for generation forecasting, there is a special calculation model, which includes many factors that affect generation. Technical information about the project must be provided for accurate forecasting.

If you want to order services from Unisolar, contact us and we will send you a questionnaire, on the basis of which we will be able to offer an individual package of services just for you! 

Learn more about the capabilities of the Unisolar service department, order free consultation on any relevant issue and get a FREE guide “How to identify weaknesses of the solar power plant and eliminate them” can be found at the link – https://service.unisolar.in.ua/

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