非线性负荷谐波传导的谐波系数算法与验证

李俊; 许留伟; 茆华风; 沈显顺; 吴亚楠; 卢晶

doi:10.11884/HPLPB201931.180361

非线性负荷谐波传导的谐波系数算法与验证

doi: 10.11884/HPLPB201931.180361

李俊^1,,
许留伟^{1, 2},
茆华风¹,
沈显顺^{1, 2},
吴亚楠¹,
卢晶^1, ,

1.
中国科学院等离子体物理研究所，合肥 230031
2.
中国科学技术大学研究生院科学岛分院，合肥 230026

基金项目:

国家自然科学基金项目 51707190

详细信息

作者简介:
李俊(1980—)，男，硕士，工程师，从事电能质量控制技术研究；junli@ipp.ac.cn

通讯作者:
卢晶(1989—)，男，博士，助理研究员，从事无功补偿、有源滤波控制方面研究；lujing@ipp.ac.cn

中图分类号: TM761
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- 被引次数: 0
出版历程
- 收稿日期: 2018-12-11
- 修回日期: 2018-03-22
- 刊出日期: 2019-04-15

A harmonic coefficient algorithm for nonlinear-load harmonic conduction with experimental verification

Li Jun^1
,,
Xu Liuwei^{1, 2},
Mao Huafeng¹,
Shen Xianshun^{1, 2},
Wu Ya'nan¹,
Lu Jing^{1
, ,}

1.
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
2.
Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China

摘要

摘要: 谐波在电网侧的污染量不仅取决于非线性负荷发射, 更与谐波在整个系统中的传导息息相关，而目前关于谐波传导评估多采用直接的平均电流放大公式，并没有深入的研究不同谐波频次的综合影响，也鲜有明确的谐波系数算法。本文基于Parseval等式——Rayleigh能量定理，考虑谐波旁瓣频次，提出了一种针对非线性负荷谐波传导的谐波系数算法，弥补了根据单谱线平均电流放大倍数衡量谐波传导的不足。给出了基于非线性负荷的MATLAB仿真计算实例，并在EAST实验中通过与实测数据对比验证了其正确性。
- 非线性负荷 /
- 谐波传导 /
- 谐波系数 /
- 谱线综合
Abstract: The harmonic pollution on the power grid depends not only on the generation of nonlinear thyristor-based converter load, but also on the amplification of harmonics throughout the reactive power compensation system. At present, the harmonic current amplification formula is often used for the conduction evaluation, but it is difficult to characterize the mechanism of the whole spectrum conduction. Based on the Parseval-Rayleigh energy theorem criterion, a harmonic coefficient algorithm for nonlinear load is proposed. The calculation example of harmonic coefficient for the nonlinear load by MATLAB is analysed, and the correctness is validated by comparing with the measured data in the EAST experiment.
- nonlinear load /
- harmonic conduction /
- harmonic coefficient algorithm /
- spectrum synthesis

HTML全文

图 1 三谱线归集的二次谐波

Figure 1. Second-order harmonic combining the three spectral frequencies

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图 2 EAST极向场变流器电力网络

Figure 2. Power system of EAST poloidal field converters

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图 3 系统简化等效电路

Figure 3. Equivalent circuit of power system

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图 4 EAST电网结构

Figure 4. Grid structure of EAST power system

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图 5 单频率谐波电流系数曲线

Figure 5. Harmonic current coefficient of single frequency

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图 6 典型实测波形

Figure 6. Typical measured waveforms

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图 7 网侧及负荷侧二次谐波分析结果

Figure 7. Analysis of second-order harmonic on power grid and load side

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