Clamp Meter - How to Diagnose PV System Faults? Do you know the three typical questions?
In many factories and facilities today, there is a need for HVAC tehničari who know how to troubleshoot and troubleshoot photovoltaic (PV) systems. Factories are looking for ways to reduce energy dependence, and they are insingly turning to renewable energy sources, such as solar PV.
Fault diagnosis and troubleshooting of PV panels
1. The entire PV system is paraliziran/no power generation; this may be related to inverter problems.
2. The output of the PV system is lower than expected; this may be related to an array problem or a module problem.
The concentrator is a good place to troubleshoot the system because the wiring from the various modules returns here. Each module may have a fuse which should be checked with a Fluke 376 FC.
Dirt on the modules or modules that are in the shade may cause reduced output. Although modules are generally designed to be maintenance-free for many years, cleaning may be required.
Greška Dijagnoza i Eliminacija od PV opterećenja
The PV system is used to drive the building's electric loads, and any problems with the loads will also afct the system. The first step is to check the load switch fuse and circuit breaker with a steznica meter to see that the correct voltage is present at the load connection. Then check the fuse and circuit breaker with the stezaljka metar FC. If a fuse blows or a circuit breaker trips, locirajte the uzrok i popravak or zamijeni the neispravan dio. If the load is a motor, the internal thermal circuit breaker may have tripped, or there may be an open winding inside the motor. For testing, plug in another load to see if it works.
Fault Diagnosis and Elimination of PV Inverters
You probably deal with variable speed drives on a daily basis, so check AC and DC power frequently. Inverters in PV systems can also fail and cause malfunctions. The inverter converts the DC power from the PV system to AC power for the building. If the out from the inverter is netočno, first check and record the DC input voltage and current levels of the inverter. On the AC side, check the the izlaz voltaže i struja razina of the inverter with a stezaljka meter FC. Many of these systems have display screens that indicate current inverter and system performance. Because the FC produces true rms readings, you can measure and record power (kW) out in voltage and current. If possible, use the inverter screen to display the current total kilowatt-hour (kWh). Then record that value and compare it to the value recorded the the last time vi provjereno.
