Introduction
Functions
The PID module is used to prevent PV module output power degradation due to the potential induced degradation (PID) effect in a PV power system. The PID module injects voltage between the phase wire and the ground cable of the isolation transformer to adjust the voltage between PV+ or PV– of the PV module and ground to avoid the PID effect, thereby improving energy yields and increasing revenue.
The PID module must work with Huawei SUN2000 and SmartLogger2000 (SmartLogger for short) and is factory-installed in the SmartACU2000B smart array controller (smart array controller for short).
It can automatically switch the output status based on the SUN2000 status, and shut down for protection if a fault occurs.
Benefits
- Supporting double-column transformers and dual-split transformers
Each smart array controller can house two PID modules. For a dual-split transformer, two PID modules can meet the requirement for avoiding the PID effect in the PV power system.
- Centralized compensation
The PID module supports both the 1000 V, 1100 V, and 1500 V DC SUN2000s. If a double-column transformer is used, the DC capacity for a single PID module is 10 MW at most. If a dual-split transformer is used, the DC capacity for two PID modules is 16 MW at most. The PID module can simultaneously compensate for all the PV modules for the connected SUN2000s.
- Automatic output control
- The PID module automatically starts immediately when the SUN2000 exports power to the power grid at day. The PID module injects voltage between the phase wire and the ground cable of the isolation transformer to adjust the voltage between PV+ or PV– and ground to avoid the PID effect.
- The PID module enters Standby mode automatically after the SUN2000 stops exporting power to the power grid at night.
NOTE:
The PID module works properly when the SUN2000 exports power to the power grid after Reactive power output at night is set to Enable.
- Easy installation and commissioning
- The PID module has been wired when it is factory-installed in the smart array controller.
- The embedded commissioning mode enables commissioning over the SmartLogger embedded WebUI or the local commissioning tool SUN2000 app.
- Easy maintenance
- On the embedded WebUI of Huawei SmartLogger, you can view the running information, active alarms, and performance data about the PID module, upgrade the firmware of the PID module, export logs, and set running parameters for the PID module.
- By connecting Huawei SUN2000 app to the PID module over a Bluetooth module or USB data cable, you can also view the running information, active alarms, and performance data about the PID module, upgrade the firmware of the PID module, export logs, and set running parameters for the PID module.
- If you connect a USB flash drive to the USB port of the PID module, the PID module can read the automatic maintenance script saved in the USB flash drive for firmware upgrade and log export.
