Knowledge of photovoltaic plants FAQ

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4. Is it possible to monitor the power production of a PV system online?


The grid companies cooperate with the energy authorities at this level to carry out metering, information monitoring and statistics of distributed PV power generation within the coverage of the grid at this level. If the PV system is installed with a corresponding monitoring system, the power generation can be monitored online. In addition, the monitoring system can also monitor key equipment parameters, power quality and environmental parameters online.


5. How can I tell if a distributed PV grid-connected system is working stably, if the power quality meets the requirements, and if the system will cause damage to household appliances in a fault state?


A power quality analyser can be used to test the power quality at the grid connection point of the power station to see if it meets the requirements of the national standards. If it meets the requirements, then the grid-connected PV system is working stably. In the event of a fault in the PV system, there is a protection device to cut off the power supply, so no damage is caused to domestic appliances.


6. If there is a grid outage or other failure, can the grid-connected household distributed PV system still operate normally?


After a grid outage, household distributed PV power generation systems are generally withdrawn from operation and cannot generate electricity normally. However, in some extreme cases, the phenomenon of islanding may occur, i.e. after a grid outage, the household distributed PV system continues to operate with a partial load, affecting the personal safety of maintenance personnel and the possibility of damaging household appliances and grid facilities. Distributed photovoltaic systems must therefore have an anti-islanding function.