基于Romberg积分算法的直流配网电能计量方法

针对直流配电系统中直流母线存在谐波干扰的问题以及直流侧电流电压波形的非周期性特点,论文在深入研究影响传统电能计量算法计量精度因素基础上,深入分析直流电能中含有大量谐波时对计量结果的影响,对直流电能计量算法提出了改进方案。将复化Newton-Cotes算法和Romberg求积法引入直流配网电能计量当中,利用高阶积分法对功率积分来实现高精度电能计量,且不增加计量算法的计算量。与传统的电能计量法相比文中采用的算法结构简单、计量精度更高,适合直流配电系统电能的准确计量。

Method of DC distribution metering based on Romberg integral algorithm

In view of the problem of harmonic interference in DC bus in DC distribution system and the aperiodic characteristics of DC side current and voltage waveform, based on the in-depth study of the factors affecting the measurement accuracy of traditional electric energy measurement algorithm, this paper deeply analyzes the influence of a large number of harmonics in DC electric energy on the measurement results, and puts forward an improvement scheme for DC electric energy measurement algorithm. The complex Newton Cotes algorithm and Romberg quadrature method are introduced into the electric energy measurement of DC distribution network. The high-order integration method is used to integrate the power to achieve high-precision electric energy measurement without increasing the measurement amount of the measurement algorithm. Compared with the traditional electric energy measurement method, the algorithm used in this paper has simple structure and higher measurement accuracy, and is suitable for the accurate measurement of electric energy in DC distribution system.