How Much Do You Know About the on Grid Inverter?

on grid inverter has formed unique product technical advantages in terms of product stability, high-efficiency power conversion, low harmonics of inverter current, and safe access to the power grid. It can be widely used in photovoltaic poverty alleviation projects and distributed power generation systems. Provide stable, efficient, and safe clean energy.

• What are the working principles of photovoltaic on grid inverters?

• What is the workflow of photovoltaic on grid inverter accessories?

• What is the difference between off grid inverters and on grid inverters?

What are the working principles of photovoltaic on grid inverters?

The on grid inverter converts direct current into alternating current. If the direct current voltage is low, it is boosted by an alternating current transformer to obtain a standard alternating current voltage and frequency. For large-capacity on grid inverters, due to the high DC bus voltage, the AC output generally does not need a transformer to boost the voltage to reach 220V. In the medium and small-capacity on grid inverter, due to the low DC voltage, such as 12V, 24V, It is necessary to design the boost circuit.

What is the workflow of photovoltaic on grid inverter accessories?

Medium and small-capacity on grid inverters generally include push-pull inverter circuits, full-bridge inverter circuits and high-frequency boost inverter circuits. Push-pull circuits connect the neutral plug of the booster transformer to the positive power supply, and two power tubes Alternate work, output AC power, because the power transistors are connected to the common ground, the drive and control circuits are simple, and because the transformer has a certain leakage inductance, it can limit the short-circuit current, thus improving the reliability of the circuit. The disadvantage is that the transformer on grid inverter is low and the ability to drive inductive loads is poor.

What is the difference between off grid inverters and on grid inverters?

1. Different mechanism of action

Photovoltaic off grid inverters are power conversion devices that push-pull the input DC power, and then through the inverter bridge SPWM sinusoidal pulse width modulation technology inverted into 220V AC; photovoltaic on grid inverters are a special inverse In addition to converting direct current into alternating current, the converter can output alternating current that can be synchronized with the frequency and phase of the mains, so the output AC can be returned to the mains.

2. Different protection mechanisms

Photovoltaic off grid inverters have input reverse connection protection, input undervoltage protection, input overvoltage protection, output overvoltage protection, output overload protection, output short circuit protection, overheating protection and other protection functions; photovoltaic on grid inverter. The device has an international protection level certification, mainly for the product's protection against solid foreign objects and water.

3. Different technologies

Photovoltaic off grid inverters use the SPWM method. When narrow pulses with the same impulse and different shapes are applied to the inertial links, the effect is the same; the photovoltaic on grid inverter architecture uses newer high-frequency transformers and traditional Power frequency transformers, or transformerless inverter architecture.

The above is some information about the use and selection of on grid inverter, if you want more information, please contact Shenzhen Sumry Electronics Co., Ltd. They are committed to providing various on grid inverters with high quality for all customers from all over the world.