毕业论文：电子式智能单项电表.doc

摘要 电能是国民经济、工业、商业、等人民生活的重要二次能源，电能在现代社会中是普遍使用的，所以电能计量装置在发、供、用电的地位是十分重要的。电能计量装置就更显得重要，电能表作为测量电能的专用仪表，自诞生已有100多年的历史。电能表在电能管理用仪器仪表中占有很大比例，其性能直接影响着电能管理的效率和科学文化水平。100多年来，随着电力系统、所有以电能为动力的产业的发展以及电能管理系统的不断完善，电能表的结构和性能也经历了不断更新、优化的发展过程。电能表作为测量电能的专用仪表其性能直接影响着电能管理的效率，为使电能计量仪器仪表适应工业现代化和电能管理现代化飞速发展的需求电子式电能表应运而生。 本设计的单相电子电能表具有用电计量、监视、控制、管理四大功能，由于内部无机械摩擦而准确度高，灵敏度高，易实现自动化测量，用RS——485可实现远方通信 。本次设计的多功能单相电子式电能表能采集计算电压、电流、有功电能、无功电能，在电能表本体上有LCD显示器，显示采集和计算的各种所需数据；并具有RS485通讯接口。 该设计对电能表的功能及分类作了简单的介绍，让读者对电能表有个基本的了解，知道它是如何产生的及它的发展情况，它有什么用途，对单相电子式电能表的硬件结构作了详细的描述，分别从电源电路、计量电路、通讯电路、管理电路及其它部分电路四大部分着手介绍了各部分的原理及电路图，并对它们分别作了讲解。 关键词：电能表 电子式 单相式 RS485 多功能  Electricity is the national economy, the industrial, commercial, and peoples life as an important secondary energy, power in modern society is commonly used, so energy metering device in hair, offer, electricity position is very important. Electricity measurement device is more important, the special power as measurement watt-hours meter, has since birth history of over 100 years. Watt-hour meter in power management with instruments of very large proportion, its capability directly affects the efficiency of power management and scientific and cultural level. More than 100 years, along with the power system, all based on the power for the development of power industry and power management system, perfecting the structure and properties of the meter has experienced constantly updated, optimizing the process of development. As a special measuring electric power meter its capability directly affects the efficiency of power management, to make electricity measurement instruments to adapt to industrial modernization and power management modernization rapid development needs) -phase watt-hour meter arises at the historic moment. This design single-phase electronic watt-hour meter has electricity meters, surveillance, control, management four function, due to internal no mechanical friction and high accuracy, high sensitivity, easy to realize automatic