Abstract:1. The standard of inverter conversion efficiencyFor solar inverters, they are consumables, and their lifespan will be determined by the passage of ti...
1. The standard of inverter conversion efficiency
For solar inverters
, they are consumables, and their lifespan will be determined by the passage of time and the conversion rate during use. In order to ensure the service life and safety of the inverter, the country has formulated relevant standards, which is to set a limited value for the conversion efficiency. And this limit value is based on the basis of professional science, not arbitrarily set the limit value. The conversion efficiency of the inverter must be higher than 94% in the case of a transformer, and higher than 96% in the case of no transformer. Therefore, in order to ensure sufficient market competitiveness, many brands in the market will work hard to improve the conversion efficiency of products.
2. How to improve conversion efficiency
The premise of improving the conversion efficiency is to reduce the loss. The loss of IGBT is fundamental to determine whether the conversion efficiency can be improved, so the efficiency can be improved by reducing the loss of IGBT. However, it should be noted that there is a certain limit to the reduction of this loss, and it cannot be reduced without limit. Moderately reducing the switching frequency is the key to improving the conversion efficiency, avoiding blindly reducing the switching frequency and causing the degradation of power quality.
Secondly, the conversion rate of the solar inverter needs to reduce the loss of the transformer. The loss of the transformer usually comes from its own copper and iron loss. If the loss of these two aspects can be reduced, the conversion rate of the inverter can be effectively improved. In addition, the loss of the reactor is also a key factor affecting the conversion rate. On the basis of this factor, the inductive reactance of the reactor can be reduced, and the conversion efficiency of the inverter can be effectively improved.
3. The necessity of improving the conversion rate
Why do we need to increase the conversion rate of the inverter? We must know that it is very important to increase the conversion efficiency. By improving the conversion efficiency of the inverter, the income can be effectively increased, and the cost of the inverter can also be reduced. If the inverter can generate 12 degrees more per day on a relatively favorable basis, then the excess electricity generated in a year is very amazing.