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山东大学研究生毕业论文稿纸
摘要
本文基于电力电子技术的观点,从电力节能和变压器经济供电的角度出发,讨论了电力变压器的并列运行方式,提出了电力动态供电的新方法。也就是通过对变压器负荷进行实时检测,控制投运的变压器台数,使各台变压器均工作于最佳负荷率附近。从变压器自身运行的经济性、电网供电可靠性、容载比、供电灵活性、投资及节约用地等方面确定配电站变压器的台数为3N4台。对于并列运行的变压器,按照综合经济效果法确定容量,能较全面地反映选择变压器的经济性与
合理性。用ATMEL 司 AT89C52单片机作为核心进行动态负荷的
实时检测,并控制并列运行的变压器的台数。应用电力电子技术和器件设计变压器切换开关,改进了开关的性能。本课题思想新颖、技术先进,对于电网改造、提高变压器的效率和节能降耗具有重要的现实
意义。
关键词:电力电子变压器并列运行电力动态供电智能模块
山东大学研究生毕业论文稿纸
ABSTRACT
Based on the review of power electronics J for the sake of power saving and economic power supplying of transformer,this thesis discussed parailel operation of electric transformers and presented a new opinion of power dynamic is to say,by measuring the load on transformer real—time,the number of transformers on
operation was controlled to make each transformer work near the best load economics、reliability、ratio of capacity and load、 flexibility、investment、and place saving into account,the number
of transformers in distributing substation is to the
method of generalized economic effect to finalize the capacity of transformer can reflect economics and dynamic load was measured real—t ime and the nuⅢber of transformers was
controlled by using AT89C52 single—chip puter produced by ATMEL improve the capability of transformer switches, power electronics technology and devices were applied to the design of transformer thesis is novelty and is
significant for grid rebuilding、efficiency im—ovment of
transformer and energy saving.
KEYWORDS:power electronics,transformer,parallel operation,
power dynamic supplying, intelligent module
山东大学研究生毕业论文稿纸

变压器在传递功率的过程中自身也要消耗有功和吸收无功功率。在发、供、用电过程中变压器的电能损失约占整个电力系统电能损失的30%左右,约占总发电量的7一lO%,这对全国来说,意味着全年变压器的电能总损失为455 650亿Kwh[¨[“。在当今世界能源日益紧张的情况下,如何降低变压器本身的损耗,提高变压器的效率,已成为世界各国争相研究的热门课题。从我国目前的电气设备状况和电力生产形势来看,研究变压器的经济运行和节电理论并运用于生产,无疑会产生巨大的经济效益和良好的社会效益。

在我国电力行业中,大量存在着变压器“大马拉小车”的现象, 也就是大容量变压器带小负荷运行的现象,这是对变压