Photovoltaic effect of hot nest analysis of the harm and protection

The solar photovoltaic power generation has many advantages, but in use process will appear some problems, such as hot spot effect, so what is the hot spot effect? Photovoltaic modules hot spot effect is refers to under certain conditions, series branch covered in the

the solar photovoltaic power generation has many advantages, but there are some problems in using process, such as hot effect, so what is a hot spot effect? Photovoltaic modules of hot spot effect refers to under certain conditions, be covered in the series branch of solar module will be loaded, use other illuminated solar energy, the covered solar module will generate heat. Blocked pv module will consume illuminated pv modules produce some or all of the energy, in order to reduce the output power. Severity will permanently damage the solar cell components, and burned them. Driver: 1. The cause of the hot effect is a mixture of a single bad battery, the virtual welding electrode pads, battery, a single cell from crack to damage evolution characteristics of deterioration, the cover of the battery part, etc. 2. As a result of the existence of some shadows, some of the solar cell module current and voltage of battery has been changed. As a result, the solar cell module part of the product of current and voltage increase, and then the battery module part on temperature. Protection measures: the bypass diode in parallel in the solar cell module between anode and cathode, in order to increase the reliability of the square matrix. Under normal circumstances, the bypass diode is reverse biased condition, will not affect the normal work of device. Principle: when a battery is blocked, another battery to reverse biased become a big resistance. Then, open the diode. Total more than shielding battery light in battery current part is diode, thereby preventing shield battery overheat and damage. In order to prevent the energy caused by lighting components have been covered parts consumption.