基于DSP和LabVIEW的分布式电能质量监测装置设计

Power quality monitoring instrument based on DSP and LabVIEW

设计和开发了一套以DSP和虚拟测量技术为核心的分布式电能质量实时监测装置。装置由EOC模块、馈线监测单元以及监控单元3个部分组成。EOC模块主要实现母线电压高速采样,并将采集数据通过以太网送至监控单元进行瞬态扰动的监测、定位与分类;馈线监测单元对馈线的监测数据实时采集、处理;监控单元对各采集单元上传的数据进行进一步分析和处理,实现数据存储和管理。用于母线电压暂态分析的Mallat算法由监控单元的软件实现,而用于馈线电压和电流分析的数字滤波、加窗、软件定频采样法、线性插值以及FFT运算等工作主要由DSP芯片完成。因此,该监测装置可以对一个变电站所有母线暂态电压以及馈线的状态进行实时监测与分析。

A distributed power quality monitoring instrument based on DSP and virtual measuring technology is developed, which is composed of EOC（Ethernet On Chip） module,FCU（Feeder Control Unit） and SU（Supervision Unit）. EOC module is used to implement the high-speed sampling of bus voltage and transmit the databy Ethernet to SU;FCU accomplishes the data acquisition and processing of feeders;SU monitors, locates and classifies the transient disturbances, as well as stores, administrates, analyzes and handles data from all data acquisition units. The Mallat algorithm for bus voltage transient analysis is implemented in SU, while the digital filtering, windowing, fixed-frequency software sampling, linear interpolation and FFT algorithm for feeder voltage / current analysis is realized by DSP chip. The monitoring instrument can real-timely monitor and analyze the operating conditions of all feeders and buses in a substation.