快速变化的电能信号波形模态对直流电能表误差影响分析

焦东翔; 袁瑞铭; 张知杰; 巨汉基; 向洪江; 王学伟

焦东翔,袁瑞铭,张知杰,巨汉基,向洪江,王学伟.快速变化的电能信号波形模态对直流电能表误差影响分析[J].电测与仪表,2024,61(12):194-204.
JIAO Dongxiang,YUAN Ruiming,ZHANG Zhijie,JU Hanji,XIANG Hongjiang,WANG Xuewei.Analysis of the impact of rapidly changing electricity signal waveform modal on the dynamic error of DC electricity meter[J].Electrical Measurement & Instrumentation,2024,61(12):194-204.

快速变化的电能信号波形模态对直流电能表误差影响分析

Analysis of the impact of rapidly changing electricity signal waveform modal on the dynamic error of DC electricity meter

DOI：10.19753/j.issn1001-1390.2024.12.024

中文关键词: 直流电能信号直流电能表建模快速变化波形模态波形模态建模动态误差影响

英文关键词:DC electricity signal, DC electricity meter modeling, rapidly changing waveform mode, waveform mode modeling, impact on dynamic error

基金项目:国家电网有限公司科技项目（5700-202314248A-1-1-ZN）

作者中文名	作者英文名	单位
焦东翔	JIAO Dongxiang	国网冀北电力有限公司计量中心，北京 100045
袁瑞铭	YUAN Ruiming	国网冀北电力有限公司计量中心，北京 100045
张知杰	ZHANG Zhijie	国网冀北电力有限公司计量中心，北京 100045
巨汉基	JU Hanji	国网冀北电力有限公司计量中心，北京 100045
向洪江	XIANG Hongjiang	北京化工大学信息科学与技术学院，北京 100029
王学伟	WANG Xuewei	北京化工大学信息科学与技术学院，北京 100029

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中文摘要:

针对直流非线性负载导致电压和电流波形的骤升或骤降、电流振荡或阶梯变化等的快速变化波形模态，文中采用机理建模的方法，首先建立直流电能表信号预处理单元、信号转换单元、功率测量单元和电能测量单元的数学模型；建立8种典型电流和电压单一波形模态的数学模型，及其3种典型电流和电压组合波形模态的数学模型；仿真分析11种动态电能信号波形模态对直流电能表动态误差的影响；给出了对电能表动态误差的影响最大的波形模态：单一波形模态中，尖顶骤升波形模态输入时电能表动态误差最大，达到-5.16×10-2，组合波形模态中，编号9组合波形模态动态误差最大，达到-1.05×10-3，以及对动态误差影响最大的功率滤波器类型；文中结论可为制定直流电能表动态误差的测试评价试验条件与改进电能表提供理论依据。

英文摘要:

Aiming at the impact of rapidly changing waveform modal caused by DC nonlinear load, such as sudden rise or drop waveform of voltage and current waveform, current oscillation, or stepped change on DC electricity meters, this paper employs a mechanism-based modeling approach. Firstly, mathematical models for the signal preprocessing unit, signal conversion unit, power measurement unit, and energy measurement unit of the DC electricity meter are established. Secondly, mathematical models for eight typical single waveform modes of current and voltage, as well as three typical combined waveform modes of current and voltage, are developed. Subsequently, a simulation analysis is conducted on the influence of 11 dynamic energy signal waveform modes on the dynamic error of the DC electricity meter. Finally, the waveform mode which has the greatest impact on the dynamic error of the DC electricity meter is given as follows: in the single waveform mode, the dynamic error of the DC electricity meter is the largest when the peaked waveform mode is input, reaching -5.16×10-2. In the combined waveform mode, the dynamic error is the largest for the waveform mode labeled as number 9, reaching -1.05×10-3, as well as the type of power filter that most significantly affects the dynamic error, is identified. The conclusions of this paper can provide a theoretical basis for establishing testing and evaluation conditions for the dynamic error of DC electricity meters.

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