| 引用本文: | 谢荣斌,杜 帆,程 湘,周 群,徐方维.三相不平衡及谐波对三相四线低压配电网线损的影响[J].电力系统保护与控制,2020,48(21):22-30.[点击复制] |
| XIE Rongbin,DU Fan,CHENG Xiang,ZHOU Qu,XU Fangwei.Influence of three-phase imbalance and harmonic on line loss of three-phase four-wire low-voltage distribution network[J].Power System Protection and Control,2020,48(21):22-30[点击复制] |
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| 摘要: |
| 针对三相四线制低压配电网中的线损问题，提出了在复合电能质量作用下的线损计算方法以及与单一电能质量作用下的线损比较方法。首先对三相不平衡引起的线损进行推导；其次依据叠加原理推导谐波条件下的线损；然后综合考虑和推导这两种电能质量共同作用下的线损，并根据对称分量法对这两种电能质量在单独与共同作用下的线损进行比较。结果表明三相不平衡加剧谐波损耗，即谐波及三相不平衡共同存在时的线损大于各自单独存在时造成的线损之和。最后利用Matlab/Simulink仿真工具和chroma 6590可编程交流电源对每一部分均进行实验，验证了理论推导的正确性。 |
| 关键词: 谐波 三相不平衡 线损 Matlab/Simulink chroma 6590可编程交流电源 |
| DOI：DOI: 10.19783/j.cnki.pspc.191561 |
| 修订日期：2020-04-01 |
| 基金项目:国家自然科学基金项目(51877141)“新一代电力系统中谐波发射水平评估理论与方法研究”；南方电网公司科技项目(0002200000042389)“配电网电能质量引起线损量化评估及修正计算方案研究” |
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| Influence of three-phase imbalance and harmonic on line loss of three-phase four-wire low-voltage distribution network |
| XIE Rongbin,DU Fan,CHENG Xiang,ZHOU Qu,XU Fangwei |
| (1. Guiyang Xifeng Power Supply Bureau of Guizhou Power Grid, Guiyang 551100, China;
2. School of Electrical Engineering, Sichuan University, Chengdu 610065, China) |
| Abstract: |
| Aiming at problem of line loss in a three-phase four-wire low voltage distribution network, this paper presents a method for calculating line loss under the action of composite power quality and compares it with that under the action of single power quality. First, the line loss caused by three-phase imbalance is deduced. Secondly, the line loss under harmonic condition is derived according to the superposition principle. Then the line losses under the combined action of the two power qualities are comprehensively considered and derived, and the line losses under the combined action of the two power qualities are compared by the symmetric component method. The results show that the three-phase imbalance aggravates the harmonic loss, that is, the line loss when the harmonic and the three phase unbalance exist together is greater than the sum of the line loss when they exist separately. Finally, the Matlab/Simulink simulation tool and chroma 6590 programmable AC source experiment are used to test each part and verify the correctness of the theoretical derivation.
This work is supported by National Natural Science Foundation of China (No. 51877141) and Science and Technology Project of China Southern Power Grid Company (No. 0002200000042389). |
| Key words: harmonic three-phase imbalance line loss Matlab/Simulink chroma 6590 programmable AC source |
