Provide independent power systems design and independent electric power systems installation solutions, and talk about photovoltaic modules, inverters and system maintenance in power systems engineering
There are two main types of photovoltaic cells: crystal cells and thin film cells. Examples of different types of photovoltaic cells are shown in Figure 1. Research in this area is continuing, and manufacturers are always looking for lower cost and higher efficiency photovoltaic cells. For example, there is currently a hybrid heterojunction cell on […]
(1). Characteristics of photovoltaic cellsSolar cell characteristics can be fully displayed by I-U characteristics. Therefore, it is particularly important to understand the output voltage U and output current I and how they change. In order to determine these characteristics, a photovoltaic cell characteristic measurement platform as shown in Figure 1 is established. Open circuit voltage […]
The vast majority of commercial photovoltaic modules in history have been composed of silicon, and this is still the case today, although there are also other technologies and photovoltaic modules available or under development. Under certain conditions, electrons can move away from silicon atoms and become part of an electric current. ①Silicon atomic structureSilicon atoms […]
There are two basic ways of connecting electrical components into a circuit, namely series and parallel. In general, most circuits are composed of a certain number of circuits in parallel and/or series. ① Series circuitThe path through which current flows from one potential to another is called a circuit. The current flows through all electrical […]
① PolarityThe lack of electrons (positive charge) or excess electrons (negative charge) cause the material to carry an electric charge. When the electron distribution is equal, the material is electrically neutral. Along with the change of the electronic balance, there will be a potential difference, which will cause the movement of the current to do […]
① IrradianceThe sun is a nuclear fusion reactor and may continue to shine for millions of years. When the sun burns, the peak of the energy from the sun reaching the top of the earth’s atmosphere is 1367kW/m², which is called the solar constant. Its peak energy attenuation through the atmosphere and reaching sea level […]
①Photovoltaic principlePhotovoltaics (PV) is a solid-state semiconductor technology that can directly convert light energy into electrical energy, without moving parts, noise and emissions. From the 1950s to the beginning of the 21st century, the most common form of photovoltaic equipment was polysilicon. Polysilicon has a high conversion efficiency. In addition, silicon resources are relatively abundant […]
Photovoltaic power generation is based on the principle of photovoltaic effect, using solar cells to directly convert solar energy into electrical energy. Whether it is used independently or connected to the grid for power generation, photovoltaic power generation systems are mainly composed of solar panels (components), controllers and inverters. They are mainly composed of electronic […]
Check these items according to the on-site safety plan, and check to ensure that all equipment operates in an orderly manner before starting work. ①Personal safety list(1) Work together (don’t work alone!).(2) To understand various safety measures, equipment and emergency procedures.(3) Safety checklist.(4) Safety helmet.(5) Eye protection device.(6) Dry leather gloves for electrical work.(7) Rubber […]
Will introduce the general dangerous points that appear when carrying out the work related to the independent power generation system.① Personal injury (non-electrical, non-chemical)People working in photovoltaic power stations will be outdoors, even in remote areas. There may be cases where manual and electric tools are used on metal or wire equipment. Workers will also […]