What is the difference between photovoltaic power generation and solar power generation?

Photovoltaic power generation is a small category of solar power generation. Solar power generation includes photovoltaic photochemical, photo induced, and photobiological power generation. There are the following differences between the two:

1. The principle and device of power generation are different. Solar power generation is achieved by using a collector to drive a turbine to generate electricity, which is a method of converting heat into electricity. The main components are collectors or devices; Photovoltaic power generation utilizes the photovoltaic effect of semiconductors to directly convert light energy into electricity, and battery panels are the basic components of photovoltaic conversion.

2. Differences in usage scope: Compared with traditional thermoelectric and hydroelectric power generation, solar power generation is more suitable for large-scale development. In addition, thermal power generation requires higher lighting conditions and is more suitable for areas with good lighting conditions. However, photovoltaic power generation devices are relatively simple and have lower requirements for light, making them more suitable for small-scale development and therefore more suitable for decentralized utilization.

3. Specific application: Photovoltaic power generation has been industrialized, and the utilization technology is more mature, suitable for large-scale promotion and use. At present, thermal power generation is mainly in the stage of scientific research demonstration, and the cost is also at a very high level. The large-scale application still requires time.

In fact, solar power generation is rapidly becoming an important method for solving power problems. Most people know that the cost of solar power generation has dropped by an astonishing 82% in the past decade. Many innovations in solar energy site selection and public land use (other uses of the site) are increasing the economic viability of solar power generation. The obvious location is on the rooftop. As an economic decision, many retailers and large flat roof warehouses have added solar panels.

A turning point in the universal concept is the idea of floating solar panels. In this design, it is placed on the water body so as not to occupy valuable land, and the water can keep the solar panels cool, thereby improving solar energy conversion efficiency.

For example, it is called "agricultural photovoltaics". The idea is to install panels to maximize space and allow the land below to be used for agriculture. The battery panel should be installed high enough so that the equipment can be located underneath and there is enough space for plants to receive sufficient light. Plants actually benefit from partial shading, and the soil retains more water, thus saving water. In addition, due to the increase in humidity below, the panel runs cooler, and of course, it can generate clean energy from the sun.

Wherever a solar power plant is located, it requires a power electronic converter to connect it to the grid. The converter includes an optional boost stage and an inverter to convert DC power into AC power synchronized with the grid. This conversion efficiency directly affects the economic viability of the project. Silicon carbide (SiC) is the next generation power switching technology that can improve grid connection efficiency, reduce cooling systems, and lower the cost of the entire system.