What Is the Significance of on Grid Inverter?

The on grid inverter can only inject rated power into the grid for PQ control, and the voltage and frequency of the grid-connected point are not stable. In terms of hardware structure, the DC input of the on grid inverter is usually a volatile renewable energy source such as photovoltaic or wind power.

• What is the technology of on grid inverter?

• What is the peak power tracking voltage (peak power tracking voltage) of the on grid inverter?

• What is the Start voltage of the on grid inverter?

What is the technology of on grid inverter?

The on grid inverter architectures use newer high-frequency transformers, traditional power frequency transformers, or transformerless inverter architectures. The high-frequency transformer does not directly provide 120 V or 240 V AC power, but a computer-controlled multi-step program that converts the power to high-frequency AC, then to DC, and finally to the voltage and frequency required by the power supply. Inverters without transformers are lighter than on grid inverters with transformers, and their efficiency is better. They are very popular in Europe. However, because there is no electrical isolation between the DC circuit and the AC circuit, it is worried that the short-circuit current of the DC terminal will directly jump into the mains circuit when there is a fault, so it entered the US market late. However, since 2005, the National Electrical Code of the National Fire Protection Association (NFPA) has canceled the requirement that all solar systems require negative terminal grounding, and added new safety requirements so that no transformer (or no electrical isolation) is allowed The on grid inverter enters the US market. VDE 0126-1-1 and IEC 6210 have also allowed and defined the safety mechanisms required by such systems. First of all, a residual current or grounding circuit is required to detect abnormal short circuits, and an insulation test is also required to confirm the separation between the DC circuit and the AC circuit.

What is the peak power tracking voltage (peak power tracking voltage) of the on grid inverter?

This indicates the DC voltage range in which the maximum power point tracking (MPPT) of the on grid inverter can operate. The system designer needs to confirm that the series connection of the system has been optimized. For most of the year, the voltage generated after the series connection is within the above range. Because the voltage may fluctuate and change with temperature, this can be a difficult job.

What is the Start voltage of the on grid inverter?

Not all on grid inverters will indicate this value. This value refers to the minimum DC voltage required for the on grid inverter to start and start operation. It is particularly important in solar applications because the system designer needs to Confirm that there are enough photovoltaic modules connected in series, whose voltage can exceed the starting voltage. If the manufacturer does not indicate this value, the system designer will generally use the lower limit of the peak power tracking voltage as the lowest voltage of the on grid inverter.

After reading the above, do you have a deeper understanding of on grid inverter? Shenzhen Sumry Electronics Co., Ltd. has been committed to providing customers with reliable on grid inverters and perfect after-sales service so that customers can invest easily, use them with confidence, and have no worries.