应用Prony算法的广域量测信号时延补偿方法

发布时间：2018-01-09 01:01

本文关键词：应用Prony算法的广域量测信号时延补偿方法　出处：《电网技术》2016年06期 　论文类型：期刊论文

【摘要】：通信时延是电力系统广域网络化控制中不可忽略的问题,对带有时延的远端量测信号进行预测补偿极具工程实用价值。文章介绍了包含时延补偿器的广域控制系统结构;基于电力系统中广域控制器输入信号(例如角速度、功角等)可采用衰减三角函数的线性组合准确近似的特点,提出了改进Prony预测补偿算法以及评价预测补偿效果的指标;提出了基于巴特沃斯低通滤波器的抗噪声方法,并通过修正Prony模型参数补偿滤波环节引入的相移。最后使用四机二区域系统暂态仿真曲线和浙江电网PMU实测数据,采用不同预测补偿算法进行了测试验证,结果表明提出的改进Prony预测补偿算法对信号噪声具有良好的抗噪性,可准确实现时延信号的实时预测补偿,满足工程应用需求。
[Abstract]:Communication delay is a problem that can not be ignored in power system wide area networked control. It is very valuable to predict and compensate the remote measurement signal with time delay. The structure of wide area control system including time delay compensator is introduced in this paper. Based on the characteristic that the input signal of wide-area controller (such as angular velocity, power angle, etc.) can be approximated accurately by linear combination of attenuation trigonometric functions in power system. The improved Prony predictive compensation algorithm and the index to evaluate the predictive compensation effect are put forward. An anti-noise method based on Butterworth low-pass filter is proposed. Finally, the transient simulation curve of four-machine and two-area system and the measured data of PMU in Zhejiang power network are used by modifying the parameters of Prony model to compensate the phase shift introduced by filtering link. The test results show that the improved Prony predictive compensation algorithm has good noise resistance to signal noise and can accurately realize the real-time prediction compensation of delay signal. Meet the requirements of engineering application.
【作者单位】：浙江大学电气工程学院;国网浙江电力调度控制中心;
【基金】：国家电网公司总部科技项目(5211011400B8)~~
【分类号】：TM76
【正文快照】： 基于巴特沃斯低通滤波器的抗噪声方法,并通过修正Prony模型参数补偿滤波环节引入的相移。最后使用四机二区域系统暂态仿真曲线和浙江电网PMU实测数据,采用不同预测补偿算法进行了测试验证,结果表明提出的改进Prony预测补偿算法对信号噪声具有良好的抗噪性,可准确实现时延信号

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