| Summary: | 碩士 === 國立中正大學 === 資訊工程學系在職專班 === 104 === Electricity generated by renewable energy resources can be used to support the transmis-sion and distribution of power. If the energy is in excess, it can be stored in batteries and be used at a future time. The life span of batteries depends on the way of charging and discharging, and can even be damaged during this process. To extend the life of batteries, it is necessary to protect them by using an adequate way of charging and discharging. The power system of renewable energy in batteries storage will change the direct current of batteries to alternative current, which is similar to that of the power of electric equip-ment in the market through the inverter. It is used for loads and involves generating ca-pacity and the amount of the load because it will affect power of batteries. In this thesis, we propose a platform of protective devices with charging and discharging of lead-acid batteries. It is switched on automatically by controlling iv charging and discharging in the load power to the full use of renewable energy, generating capacity and extending the life of lead-acid batteries. The advantage of this is to provide an uninterruptible power sup-ply.
In the system of test of the experiment, equalize function of electric equipment in the market made individual disparity of voltage downing to 0.06V and improveing balance power of the batteries effectively. In the test of lead-acid batteries’ life, voltage of Battery A protected by this system is higher 0.16V than voltage of Battery B without protection after the 30 times experiments. That is, Battery A’s degree of aging is more slowly than Battery B’s and life is also longer. Experiments prove that the system plays its role in ex-tending the life of lead-acid batteries via electrical control and protecting function.
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