## The principle of common mode current is explained in detail with pictures and texts

The area of ​​the photovoltaic array is generally large, and the parasitic capacitance to the ground can reach 200nF/kWp in a rainy or humid environment. The power switching action of the grid-connected inverter may generate high-frequency voltage changes. Due to the existence of the parasitic capacitance of the photovoltaic array to the ground, a common […]

## Classification and characteristics of topology structure of unschedulable photovoltaic grid-connected power generation circuit

Different focus points make the classification of photovoltaic grid-connected power generation systems slightly different. The following three aspects are classified and explained. According to the connection method of photovoltaic cell modules and power electronic conversion circuits From the perspective of the connection method between photovoltaic cell modules and power electronic conversion circuits, photovoltaic grid-connected power […]

## What is the true maximum power point tracking method?

The true maximum power point tracking method requires real-time measurement of voltage and current, and judges the changes in the operating point of the photovoltaic array through the voltage and current values, thereby realizing the optimization of the operating point. The advantage of this type of method is that it is not affected by factors […]

## What is the quasi-maximum power point tracking method?

The quasi-maximum power point tracking method includes mathematical formulas or tables obtained from empirical data, such as curve fitting method and pre-stored data comparison look-up table method, as well as sampling and control based on a single output parameter of the photovoltaic array, for example, using open circuit voltage method, short circuit method, etc. Current […]

## The essence of maximum power point tracking

Since the PV characteristic of photovoltaic modules is a single-peak nonlinear curve, the maximum power point of the photovoltaic array composed of its series and parallel connections will also be affected by the light intensity and the surface temperature of the photovoltaic array. Therefore, how to track the maximum power point of the photovoltaic array […]