Research on Harmonic Summation Coefficient of New Energy Grid

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Guo, Min^1 ; Jin, Qingren^1 ; Chen, Weidong^1

Electric Power Research Institute of Guangxi Power Grid Co., Ltd., Nanning

530023, China^1

关键词: Electrified railways;    Harmonic frequency;    Harmonic summations;    International Electrotechnical Commission;    Mathematical formulas;    Photovoltaic power generation;    Superimposed components;    Superposition coefficients;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/3/032012/pdf
DOI  :  10.1088/1757-899X/452/3/032012

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The third type of technical report of the International Electrotechnical Commission puts forward the harmonic voltage summation method. However, it has been found that the harmonic superposition coefficient of special load electrified railways has some discrepancies with the national standard, and the particularity of wind power and photovoltaic power generation. Therefore, it is also necessary to study the harmonic superposition coefficient suitable for wind power and photovoltaic power generation. First of all, we deduced the mathematical formula of harmonic superimposition under the condition of unknown phase, and got the relationship between the square of the total harmonic amplitude and each superimposed component. Then, by using a large number of measured data of harmonics of wind power and photovoltaic power generation, the method of numerical statistics is used to solve the expectation of the phase difference cosine of the superposed components. Finally, the harmonic superposition coefficients of wind power and photovoltaic power generation under different harmonic frequencies are summarized.