Issue |
E3S Web Conf.
Volume 243, 2021
The 5th International Conference on Power, Energy and Mechanical Engineering (ICPEME 2021)
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|
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Article Number | 01004 | |
Number of page(s) | 5 | |
Section | Power Electronics and Transmission Technology | |
DOI | https://doi.org/10.1051/e3sconf/202124301004 | |
Published online | 11 March 2021 |
A high order derivation method for distribution network transient data
1 Shiqu Power Supply Branch of State Grid Chongqing Electric Power Company, Chongqing, 400015, China
2 State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, 40044, China
* Corresponding author:1509776406@qq.com
Nowadays, high-order data needs to be processed quickly and accurately by various algorithms in distribution networks. It is difficult to ensure the accuracy of calculation both in low-order and high-order cases, due to the theoretical limitations of traditional high-order derivation methods. Aimed to improve the calculation accuracy, a new high-order derivative method based on the polynomial fitting is proposed in this paper. By analyzing the transient characteristics of voltage and current signals in the distribution network, the base fitting-function can be selected, and the coefficient of the base function can be obtained to fit the objective function by the least square method. The original discrete data will be replaced by new fitting-function for derivative operation, which not only ensures the anti-interference ability, but also overcomes the limitations of the traditional polynomial fitting method in high-order cases. The simulation results show that this method has high accuracy in high-order and low-order cases, and has good accuracy and anti-interference ability.
© The Authors, published by EDP Sciences, 2021
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