Keywords: Instructions for MPPT global scanning, MPP, maximum power point tracker
In situations where shadows, occlusions, or mismatches in component orientation may lead to a multi-peak power curve in the customer's plant during the day, a potential power loss can occur. To address this challenge, the MPPT global scanning feature is introduced to prevent power generation loss by identifying the global maximum.
Three scanning modes are available for global MPPT scanning. The detailed description of the modes can be found in the later part of this article. Please, pay attention to the following notifications:
Manual scanning. When manual scanning is not enabled, the normal MPPT Scan mode operates automatically. This ensures that the system proactively identifies and adjusts to the optimal power generation conditions, mitigating the impact of shadows or other factors that could affect performance.
Automatic (Timing) scanning and Periodic scanning. It's important to note that global MPPT scanning is activated only when the inverter is operating normally. It won't be triggered during inverter shutdowns or failures.
Setting Global MPP Scan in iSolarCloud website:
1. After logging with your account, select on the left bar "Settings", and then inside this tab, select the plant and click on "Advanced Settings". Note that the Initial Grid should have been Already set.
Fig.1
2. Inside Advanced settings, set the different types of scan following steps: a, b and c in Fig. 2.
a. Manual Scanning: One-time MPP scan. (a)
After setting up this parameter, the inverter will right away start searching for the maximum power point (MPP). This only happens if there are no errors.
Once the initial search is successful, the inverter won't repeat the process unless an error occurs or there's a reduction in power during operation. In such situations, the inverter will automatically redo the search when it restarts, ensuring it consistently finds the optimal power point for better efficiency.
b. Timing Scanning: Daily one-time MPP Global Scan. (b)
If this mode is selected, a specific time must be set for the MPP scan, including the hour and minute.
Once this setting is enabled, the inverter will execute an MPP scan at the designated time, ensuring it occurs only if there are no errors detected.
c. Periodic Scanning: Repeated scanning. (c)
If this operating mode has been selected, the inverter will always perform an MPP scan after the designated time in minutes, as long as no errors are present.
Fig.2
To finalize and confirm these adjustments, remember to apply the settings.
For further information, please download the user manual accordingly:
This manual is intended for professional technicians who are responsible for installation, operation, maintenance and troubleshooting of inverters, and users who need to check inverter parameters. The inverter must only be installed by professional technicians.
The professional technician is required to meet the following requirements:
Know electronic, electrical wiring and mechanical expertise, and be familiar with electrical and mechanical schematics.
Have received professional training related to the installation, commissioning and troubleshooting of electrical equipment.
Be able to quickly respond to hazards or emergencies that occur during installation, commissioning and troubleshooting.
Be familiar with local standards and relevant safety regulations of electrical systems.
Read this manual thoroughly and understand the safety instructions related to operations.