Photovoltaic power generation system working principle

Photovoltaic power generation systems can be divided into independent photovoltaic power generation systems (off-grid) and grid-connected photovoltaic power generation systems. Here we talk about the working principle of these two systems.

First of all, talk about the working principle of off-grid photovoltaic power generation system. I found a picture on the Internet for everyone to see.

This figure illustrates the working principle of off-grid photovoltaic power generation. The core component of photovoltaic power generation is a battery plate that converts solar energy into electrical energy and stores the generated electrical energy in a battery via a controller. When the load is used, the energy in the battery is properly distributed to each load through the controller. The current generated by solar cells is direct current, which can be directly applied in the form of direct current, or AC inverters can be used to convert electrical energy to alternating current for use in alternating current loads. Solar power can be used immediately, and it can also be stored using energy storage devices such as batteries and used when needed.

Let's take a look at the working principle of the grid-connected photovoltaic system. Let's look at a picture again.

This figure illustrates the working principle of grid-connected photovoltaic power generation. In grid-connected photovoltaic power generation systems, solar modules convert light energy into electrical energy and enter the grid-connected inverters through DC distribution boxes. Some types of grid-connected photovoltaic systems also require storage batteries to store DC power. The grid-connected inverter consists of charging and discharging control, power regulation, AC inverter, and grid protection switching. The AC output from this system can be used for both load and grid. When the grid-connected photovoltaic system is under-powered due to the weather or its own power consumption is too large, the AC power can be supplied from the public power grid. The system is also equipped with a monitoring and display system, which is used to monitor the status of the entire system, detect and generate various data such as power generation, and it can also use computer network systems to remotely control and display data.

The above is the working principle of the PV off-grid system and the grid-connected system.

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