应用广域测量信息的低频低压解列装置自动化控制技术

Automatic control technology of low frequency and low voltage splitting devices using wide area measurement information

针对电网广域测量信息含噪量较大、电网互联区域振荡阻尼难以控制的问题,以提升电网供电质量为目的,提出应用广域测量信息的低频低压解列装置自动化控制技术。以广域测量系统(WAMS)为基础,获取电网运行时的广域测量信息,利用小波分解去噪方法去除电网广域测量信息所含噪声后,通过基于Prony的电网低频振荡识别方法识别电网振荡区域与振荡数值;然后以电网振荡区域与振荡数值为基础,计算振荡中心电压和定位系数,并将其作为输入,设计低频低压解列装置自动化控制流程,实现低频低压解列装置自动化控制。实验结果表明,该方法可有效去除电网广域测量信息内所含噪声,电网互联区域振荡阻尼数值最大误差值仅为0.01,且可有效地控制低频低压解列装置。

Aiming at the problems of large noise content of wide area measurement information of power grid and difficulty in controlling oscillation damping in interconnected areas of power grid,an automatic control technology of low frequency and low voltage splitting devices using wide area measurement information was proposed.Based on the wide area measurement system(WAMS),the wide area measurement information of the power grid during the operation was obtained.After the noise contained in the wide area measurement information of the power grid was removed by the wavelet decomposition de-noising method,the power grid low-frequency oscillation identification method based on Prony was used to identify the power grid oscillation region and oscillation value.Then,based on the grid oscillation region and oscillation value,the oscillation center voltage and positioning coefficient were calcu-lated and used as input to design the automatic control flow of the low frequency and low voltage splitting device,so as to realize the automatic control of the low frequency and low voltage splitting device.The experimental results show that this method can effectively remove the noise contained in the wide area measurement information of the power grid,the maximum error of the oscillation damping value in the interconnected area of the power grid is only 0.01,and this method can effectively control the low frequency and low voltage splitting device.