电气设备谐波干扰性检测与评估方案  

Harmonic Interference Detection and Evaluation Scheme of Electrical Equipment

作　　者：张小雷 ZHANG Xiaolei(CGN New Energy Holdings Co.,Ltd.,Hefei 230000,China)

机构地区：[1]中国广核新能源控股有限公司,合肥230000

出　　处：《计算机测量与控制》2022年第3期266-271,共6页Computer Measurement &Control

摘　　要：针对风力发电、光伏发电新能源出现的谐波干扰性问题,提出了电气设备谐波干扰性检测与评估方案,设计了电气设备谐波检测系统,包含六大部分:主控电路、电压采样电路、波形转换电路、同步锁相倍频电路、A/D转换电路和液晶显示电路;实现了电气设备信号的采集、波形的转换、信号的倍频放大和信号的显示功能;并且还采用了基于改进DFT和时域准同步算法进行电气设备谐波的检测,实现对谐波精准、稳定的检测;此外还研究了对电气设备谐波评估的方法,采用非干预式估计法对电气设备谐波进行评估,实现了对负荷运行没有影响的情况下进行电气设备谐波的评估;试验表明,本研究电气设备谐波检测的误差在±0.5%范围内,具有高精准度和稳定性。The purpose of this research was the harmonic interference problem for the new energy of wind power and photovoltaic power generation.The harmonic interference detection and evaluation plan of the electrical equipment is proposed,and the harmonic detection system is designed.It included six major parts:main control circuit,voltage sampling circuit,waveform conversion circuit,genlock frequency multiplication circuit,A/D conversion circuit and liquid crystal display circuit.The functions of the electrical equipment signal acquisition,waveform conversion,signal frequency multiplication and signal display are realized.And based on the improved DFT and time domain quasi-synchronous algorithms,the detection of electrical equipment harmonics is also adopted to achieve accurate and stable detection of harmonics.In addition,the harmonic evaluation method for the electrical equipment is studied,and the non-interventional estimation method is used to evaluate the harmonics for the electrical equipment,which realizes the harmonic evaluation for the electrical equipment without affecting the load operation.The test result shows that of the harmonic detection error is high accuracy and stability.

关 键 词：谐波检测 谐波评估 改进DFT算法 电气设备 

分 类 号：TN978[电子电信—信号与信息处理]