基于FPGA+104工控板实时动态谐波监控装置设计

Design of Real-time Dynamic Harmonic Monitoring Device Based on FPGA+104 Industrial Control Panel

现阶段电能质量装置普遍采用DSP作为运算核心,随着电能质量指标逐渐增多其运算能力越发力不从心,并且其只能对用户谐波实现监测,对谐波超标用户无法控制,采用基于FPGA+104工控板硬件平台而设计的实时动态谐波监控装置,实现了电能质量指标的大数据量计算及谐波超标的预警与控制;FPGA负责频率跟踪、数据采集及PCI的数据通讯;104工控板负责电能质量各项指标的计算、数据存储、规约转换及人机交互等;软件采用自适应时域均衡的谐波信号处理方法,提高了谐波测量准确性和稳定度,降低了采样频率的抖动与偏差造成的误差;装置可同时测量12条线路的运行参数,电压电流的有效值测量精度达到0.1%,谐波测量精度达到0.2%;经在邢台供电公司28座变电站的测试与应用,实现了对谐波源用户谐波的有效监控,促进了谐波源用户主动谐波治理的积极性,取得良好效果。

At present,power quality devices generally use DSP as the computing core.As power quality indicators gradually increase,their computing power becomes more and more unsatisfactory,and they can only monitor user harmonics,and cannot control users with harmonics exceeding the standard.The real-time dynamic harmonic monitoring device designed by the 104 industrial control board hardware platform realizes the calculation of large data volume of power quality indicators and the early warning and control of harmonic exceeding standards.The FPGA is responsible for frequency tracking,data acquisition,and PCI data communication.104 industrial control board is responsible for the calculation of power quality indicators,data storage,protocol conversion and human-computer interaction.The software adopts the adaptive time domain equalization harmonic signal processing method,which improves the harmonic measurement accuracy and stability,and reduces the error caused by the jitter and deviation of the sampling frequency.Through the testing and application of 28 substations in Xingtai Power Supply Company,the effective monitoring of harmonics of harmonic source users is realized,and the enthusiasm of active harmonic control of harmonic source users is promoted,and good results are obtained.