Harmonics are induced by power electronic devices utilized in renewable energy generation.

When the penetration level of renewable energy is high, the influence of harmonics can be significant.

In addition to power quality monitoring, the performance monitoring of the energy generation is the key factor.

In control systems, the operator usually only sees the total power input and output, but not in which area of the park the most or the least power is generated.

Voltage and frequency fluctuations at the interconnected power grid are caused by the volatility of renewable energy resources, due to ever-changing weather conditions. In the low-voltage grid, voltage fluctuations are caused by rapid fluctuations in the PV system power output due to cloud transients. The larger the number of photovoltaics systems, the more important it is.

Voltage fluctuations and flicker can cause damage to electrical devices connected to the grid, and light flicker can cause annoyance and health problems for people who are exposed to it.

Integrating PV system to the utility grid increases the risk of a short circuit in the grid. Short circuit faults occur due to faults in the voltage channels caused by either direct or indirect contact. The short circuit endangers human safety, leads to power supply failures and damage to equipment.

Once a circuit breaker or main circuit breaker (MCB)’s trips, the reset is possible, and production continues. However, it is important to know and analyze the cause to avoid major damage and downtime.

It is also important to record the environmental conditions such as temperature and humidity that may have an impact.