中文摘要：

基于建筑设备物联网的分布式谐波在线监测系统包括谐波监测终端、无线网络／以太网网关、服务器等；讨论了谐波监测终端的工作原理和谐波分析算法，给出了服务器软件的整体架构和各重要模块的实现方法，并通过实验验证了谐波监测的精度；与其它谐波监测装置不同，该系统可对建筑内多个设备或配电支路的谐波进行在线监测，如有谐波畸变率等指标越限可以实时报警，谐波分析的精度达到2．5级，满足对民用建筑内谐波进行在线监测的要求；同时能将各种数据保存在数据库中，并将数据通过WEB服务器发布至互联网上。

英文摘要：

This paper presents the design of a distributed harmonic online detection system based on Internet of building equipment. This system includes harmonic detecting terminals, gateways between wireless network and Ethernet, and server computers, etc. Firstly, both the principle of detection terminals and the harmonic analysis algorithm are given in detail. Secondly, the server software architecture and some main modules are provided as well. Differing to other detecting instruments, our system can detect harmonic data from multiple electrical devices or power sub--circuits in buildings, If the indexes such as harmonic distortion rate are out Of limit, the system can realize real-- time alarm and the harmonic monitoring system analysis precision is 2.5 level which satisfies the need of ordinary power users. Moreover, the data can be stored in Relation Database Management System and present them through Web server.