Background and trends of solar inverters

Many of the advantages of the solar inverter, which is safe and reliable, no noise, no pollution, energy widely available, without geographical restrictions, no consumption of fuel, easy to maintain, can be unattended, establishment period is short, the size of random, without erecting transmission line can be easily combined with the building, and so are the advantages of conventional power generation and other power generation methods that fall. With the continuous development of the type of increase in 1000w charger inverter and control technology, the photovoltaic power generation system can be applied to all areas of the national product and related to daily life.
Inverter PV system is an important part of the nature of the power inverter output power quality photovoltaic systems. Modern inverter technology, many different types, can be categorized in different forms, there are several:
(1) according to AC inverter output frequency can be divided into frequency inverter, medium frequency and high-frequency inverter. Frequency conversion inverter makes use of frequency transformers to achieve electrical isolation between input and output. This inverter is a simple structure, reliable operation, but the inverter is bulky, heavy, noisy, efficiency needs to be improved. With the increasing performance requirements of the power supply, conventional frequency 4000w solar inverter gradually transform difficult to adapt to the lightweight, high power density, high reliability requirements. High-frequency transformation is the use of high frequency conversion technology, it has the advantage of small size, light weight, low noise, high efficiency.
(2) according to the number of phases of the inverter output can be divided into single-phase inverter, three-phase inverter and multiphase inverter.
(3) The form of the main circuit of the inverter can be divided into single-ended, push-pull, half-bridge and full-bridge and so on.
(4) by type inverter main switching devices can be divided into thyristor inverter, transistor inverter, inverter FET, IGBT inverter, and so on.
(5) by stabilizing output parameters can be divided into voltage inverter and a current source inverter.
(6) according to the control mode can be divided into transposition PWM control mode and control mode. Transposition control principle is that the two switches full bridge circuit for each leg of the complementary conduction, a phase difference between the two bridge arm switch is turned on, and by adjusting the size of the phase shift angle, to regulate the output voltage pulse width, to regulate the output voltage.