| 量化误差对电厂主汽温控制品质的影响 |
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| 引用本文： | 杨平,潘帅. 量化误差对电厂主汽温控制品质的影响[J]. 华东电力, 2008, 36(11) |
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| 作者姓名： | 杨平 潘帅 |
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| 作者单位： | 上海电力学院电力与自动化工程学院,上海,200090;上海电力学院电力与自动化工程学院,上海,200090;上海大学机电工程与自动化学院,上海,200092 |
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| 基金项目： | 上海市重点实验室上海市电站自动化技术重点实验室项目 |
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| 摘 要： | 量化误差主要与量化单位量成正比.量化单位量的大小取决于A/D或D/A的转换器的位长.量化误差将影响控制系统的准确性指标.对于电站锅炉主汽温控制系统,一般选择12位或16位的A/D或D/A转换器就可满足要求.量化器是典型的非线性环节,可能给控制系统带来自振荡、突变扰动等降低控制品质的影响.一定大小的均匀白噪声的存在,可抵消量化误差的负作用.仿真试验表明,选择偏高精度的A/D转换器,并不意味着可得到较大的控制品质改善.
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| 关 键 词： | 量化误差 电站自动化 主汽温控制 控制品质 A/D D/A 极限环 |
Influence of quantization errors on control quality of main steam temperature control systems of power stations |
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| YANG Ping,PAN Shuai. Influence of quantization errors on control quality of main steam temperature control systems of power stations[J]. East China Electric Power, 2008, 36(11) |
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| Authors: | YANG Ping PAN Shuai |
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| Affiliation: | YANG Ping1,PAN Shuai1,2(1.School of Power , Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China,2.College of Mechatronics Engineering , Automation,Shanghai Univ.,Shanghai 200092,China) |
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| Abstract: | The quantization error is directly proportional to the quantization unit value,while the quantization unit value depends on the number of digit bits of an A/D convertor or a D/A convertor.The accuracy performance of a control system is probably affected by the quantization error.For the main steam temperature system in power stations,it is suitable to select 12 or 16 bits A/D or D/A convertors.The quantizer is a typical non-linear element,and so it may lead to control quality dropping with unexpectedly dist... |
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| Keywords: | A/D D/A |
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