Deye 6kW Three Phase High Voltage Hybrid Solar Inverter

Smart functions of solar inverters

Intelligent MPPT of inverter

MPPT (Maximum Power Point Tracker) technology is the core key technology of the solar inverter, which refers to the ability of hybrid solar inverter to track and find the maximum output power of the components (square array) in real time. The output power of pv modules is affected by various factors such as irradiation and temperature, and cannot always output the nominal rated power to increase power generation.

Effect of different irradiance on output power

Effect of different temperature on output power

The inverter judges the positional relationship between the current operating point and the peak point by measuring the current, voltage and power, and intelligently adjusts the voltage (or current) at the operating point to move closer to the peak power point, so that the photovoltaic system always operates at the peak value near the power point.

Schematic diagram of MPPT tracking

Smart anti-islanding of inverter

The inverter is equipped with an anti-islanding protection circuit, which intelligently detects the voltage (V) and frequency (f) of the power grid to be connected in real time, and compares it with the preset voltage and frequency in real time, such as if the detected actual value is within a reasonable range, the hybrid solar inverter is working normally; otherwise, the current will be cut off within a corresponding time according to different measured values, the output will be stopped, and a fault will be reported.

Anti-islanding and low-voltage ride-through are inherently contradictory, but in some unattended power stations or large ground power stations, there is a certain necessity and reason for their simultaneous existence. The relevant regulations of the national standard have regulations on the time of anti-islanding protection and low voltage ride-through. When the power grid fails, the island will be generated. At this time, the photovoltaic system only needs to support the time for about 1S to wait for the power grid to recover. If it has not recovered after 2S, then Can be cut out. During this process, the hybrid solar inverter is always in the state of detecting grid information.