基于样本熵的AGC指令复杂性分析  

Analysis of the AGC Instruction Complexity Based on Sample Entropy

作　　者：张舒铠 刘鑫屏[1] 张锐锋 

机构地区：[1]华北电力大学控制与计算机工程学院,河北保定071003 [2]贵州电力试验研究院,贵州贵阳550002

出　　处：《电力科学与工程》2015年第6期43-48,共6页Electric Power Science and Engineering

基　　金：国家重点基础研究发展计划资助项目(973项目)(2012CB215203)

摘　　要：电网通过"两个细则"考核标准对机组AGC补偿服务方面进行评价,其标准仅从AGC可用率和AGC调节性能指标两方面进行评价并以此为基准来补偿火电机组在调峰、调频方面所做出的贡献,但是其AGC性能指标计算方式仍不能完全体现复杂指令信号对火电机组造成的不利影响以及火电机组为此所付出的代价。采用样本熵方法对AGC指令的复杂性进行分析。在使用样本熵方法对几组不同频率下的典型信号进行复杂性分析,验证此方法有效性和准确性的基础上,对西北电网660 MW超临界机组AGC指令进行复杂性分析。分析的AGC指令同时具有高速率大幅度单向变化、高速率中等幅度正反向变化、高速率小幅度频繁波动等特征。数据分析结果表明:样本熵能较准确地反映AGC指令的复杂性,与现场运行实际情况较为吻合。Power grid appraises the AGC compensation services throught＂two rules＂the AGC availability and the AGC adjusted performance measurement evaluation. Based on the two rules,the AGE compensation services can compensate for the thermal power generating unit contribution in terms of peak load and frequency modulation. But the AGC performance index calculation can not fully reflect the complex signals of adverse effects of thermal power generating units or the cost of thermal power units. Thus this essay employs sample entropy method to analyze the complexities of AGC instructions. The complexity analysis of typical signals of different frequencies has been conducted through sample entropy method. And the validity and accuracy of this method have been verified. Based on these previous research findings,this essay then analyzes the 660 MW supercritical unit AGC instructions the Northwest power grid. The results show that AGC instructions high data rate one-way change,high-speed medium range forward and reverse changes,high-speed small amplitude fluctuation. It has been found that the sample entropy can accurately reflect the complexities of AGC instructions,and match the running reality.

关 键 词：自动发电控制 样本熵 复杂性 AGC指令 

分 类 号：TM621[电气工程—电力系统及自动化]