模拟量输入直流合并单元延时特性研究
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TM93

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国家电网有限公司科技项目(JL71-17-005)


Study on the delay characteristics of the analoginput DC merging unit
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    摘要:

    广泛应用于高压直流输电系统的模拟量输入直流合并单元的延时对直流计量精度、控制稳定性和保护速动性有重要影响。为保证模拟量输入直流合并单元的整体延时满足延时要求,需合理配置硬件和软件延时,并对系统整体延时进行测试。该文分析一种典型的模拟量输入直流合并单元的延时特性,并对各环节延时进行具体分析,测试发现,信号调理与滤波、A/D转换等硬件环节延时相对稳定,在总延时中比重较大;CPU 软件环节的具体延时与实际采用的算法、被测参数状态引起的软件执行路径有关,具有一定的随机性。实验测得的延时结果与理论分析基本吻合,可为模拟量输入直流合并单元的设计制造和延时校正提供参考和指导。

    Abstract:

    The delay of analoginput DC merging unit is widely used in HVDC system, and it has an important influence on the DC metering accuracy, control stability and protection rapidity. In order to ensure that the overall delay of analoginput DC merging unit meets the delay requirements, the hardware delay and software delay should be configured reasonably, and the overall delay of the system should be tested. This paper analyzes the delay characteristics of a typical analog input DC combining unit, and analyzes the delay of each link respectively. It is found that the delay of signal conditioning and filtering, A/D conversion and other hardware links are relatively stable, and plays a large proportion of total delay. The specific delay of CPU software link is related to the algorithm actually used and the software execution path caused by the measured parameter state Certain randomness. The experimental results are in good agreement with the theoretical analysis. This paper provides the reference and guidance for the design, manufacture and delay correction of analoginput DC merging unit.

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熊前柱,李登云,聂琪,等.模拟量输入直流合并单元延时特性研究[J].电力科学与技术学报,2021,36(6):3-10.
XIONG Qianzhu, LI Dengyun, NIE Qi, et al. Study on the delay characteristics of the analoginput DC merging unit[J]. Journal of Electric Power Science and Technology,2021,36(6):3-10.

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  • 在线发布日期: 2022-01-05
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