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.
Three-switch bridge arm circuit The design idea of this circuit is also derived from the HERIC circuit [121], as shown in Fig. 1(a) and (b). Obviously, the efficiency of this circuit is reduced due to the higher conduction loss than the HERIC circuit. The full-load efficiency of the whole machine is about 97% [122]. Its […]
1) Full bridge inverter Bipolar PWM modulation mode is adopted. As shown in Figure 1.11, in a switching cycle, when S1 and S4 are on, S2 and S3 are off, S1 and S4 are off, and S2 and S3 are on, it can be seen that as long as VPV remains constant, the common mode […]
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 […]
Different classification methods of photovoltaic grid-connected power generation circuit topology can be obtained from different angles. In practical applications, it is necessary to select an appropriate circuit topology according to different usage occasions and grid-connected requirements. The key index factors of the topology structure of power electronic conversion circuit are: ◆High efficiency (power loss, number […]
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 […]
Status of PV power generation in EU According to the forecast of the European Union, in the middle of the 21st century, the photovoltaic power generation capacity will account for about 40% of the total power generation of the whole EU, so it can be said that the 21st century is the century of solar […]