Solar electricity-taking combined energy-storage uninterruptible power supply device

Abstract

The invention discloses a solar electricity-taking combined energy-storage uninterruptible power supply device which comprises a solar cell pole plate, an MPPT, a cell management module, a storage cell, a buffer circuit, a super capacitor and a DC-DC converter. The solar electricity-taking combined energy-storage uninterruptible power supply device has the advantages of overcoming the defect that due to the fact that a traditional MPPT control algorithm is complex and is easily affected by sunshine intensity and environment temperature changes, the tracking precision is low, ensuring the optimal state of working of the storage cell by sampling terminal voltages, discharging currents, environment temperatures and the cell capability of the storage cell and adopting the efficient PWM storage cell charging mode, utilizing the storage cell and the super capacitor for conducting combination so as to store the energy, enabling a system to have higher energy density and power density at the same time, prolonging the service life of the power source system, improving stability, just needing the solar cell to supply power, and being capable of working for a long time, convenient to install, flexible to use and free from limitation of power supply facilities in the use environment.

Description

technical field [0001] The invention relates to an uninterrupted power supply device, in particular to a direct current uninterrupted power supply device which utilizes a storage battery and a supercapacitor to store energy. Background technique [0002] In the 21st century, mankind will face the major challenge of achieving sustainable economic and social development. How to develop the economy under the dual constraints of limited resources and strict environmental protection requirements has become the focus of global attention. However, the problem of energy shortage is becoming more and more prominent. The existence of environmental pollution and greenhouse effect forces human beings to rely on scientific and technological progress and develop and utilize renewable energy on a large scale in order to effectively solve energy problems and achieve sustainable economic and social development. In recent years, the international community has generally paid attention to the ...

AI Technical Summary

Problems solved by technology

However, since the supercapacitor is in a short-circuit state when it is charged instantly, and its voltage changes greatly during the charging and discharging process, when it is used as an energy storage device in an uninterruptible power supply device, there is a problem with the stability of the output voltage during the charging and discharging process. ; In addition, since the output voltage of the supercapacitor can be very low when it is discharged, it should also fully consider the problem of releasing energy to the output load as much as possible under the premise of ensuring the safe and reliable operation of the circuit

Images