new energy photovoltaic on grid solar power system technology
Welcome to the information network of solar photovoltaic power technology. Here, we provide information about photovoltaic cells, solar power system circuit topology and on grid solar system Inverter control strategy, etc.
In a single-stage three-phase or single-phase photovoltaic grid-connected power generation system, the stable operating point of the photovoltaic array is in the right area including the maximum power point, and the left area of the maximum power point is the unstable operating area. In the unstable area, the trajectory of the output voltage of the […]
The intermittent variable step length search method is a new method that organically combines the constant voltage method and the variable step length disturbance observation method. The method is specifically divided into the following three stages, as shown in Figure 1. In the figure, ① represents the first stage-the start-up phase, ② represents the second […]
①Incremental conductance methodIncremental conductance method is to realize the tracking of the maximum power point by adjusting the voltage of the working point to gradually approach the voltage of the maximum power point. The incremental conductance method avoids the blindness of the disturbance observation method. It can determine the relationship between the operating point voltage […]
Due to its simple structure and easy implementation, the perturbation observation method is currently one of the commonly used methods to implement MPPT. The principle is to increase or decrease the output voltage or current of the photovoltaic array at a certain interval of time, and observe the direction of power change thereafter to determine […]
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 […]
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 […]