A New Portable Harmonic Analyzer Based on MSP430

Abstract:

In this paper, a new portable digital instrument is developed to measure the frequency, rms voltage, rms current and harmonic of power grid. Three phase voltage and current are sensed with precise transformer and then processed by signal conditioning unit before sampling. Synchronous AC sampling technique is introduced to avoid leakage effect of FFT. Consequently, frequency estimation, rms measurement and harmonic estimation are achieved based on MSP430. The experiment results indicate that this analyzer provides accurate frequency estimates with error in the range of 0.001Hz and amplitude estimates with error in the range of 0.1%, which can meet the need of offline application.

• Periodical: Advanced Materials Research (Volumes 971-973)
• Pages: 1059-1063
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.971-973.1059
• Online since: June 2014
• Authors: Li Qing Zhou*, Da Xu, Shuang Hu, Peng Xu
• Keywords: AC Sampling, Frequency Measurement, Harmonic Analyzer, Harmonics, Power Quality

References

[1] M. H. J. Bollen, What is power quality?, . Elect. Power Syst. Res., vol. 66, p.5–14, (2003).

[2] ZHAO Ji. "On the Power Generation and Suppression of Harmonics[J]. Applied Energy Technology, 2010, 4: 33-34.

[3] Tomic, J.J.; Kusljevic, M.D.; Vujicic, V.V., A New Power System Digital Harmonic Analyzer, IEEE Transactions on Power Delivery, vol. 22, no. 2, p.772, 780, April (2007).

DOI: 10.1109/tpwrd.2007.893372

[4] Ren-Xi Gong; Jiong-Quan Wei; Dan Sun; Ling-Ling Xie; Peng-Fei Shu; Xiao-Bi Meng, FPGA implementation of a CORDIC-based radix-4 FFT processor for real-time harmonic analyzer, 2011 Seventh International Conference on Natural Computation (ICNC), vol. 4, no., p.1832, 1835, 26-28 July (2011).

DOI: 10.1109/icnc.2011.6022441

[5] L. Podesta, S. Sangiovanni, and E. Zappitelli, A new system for distorted three-phase sinusoidal quantities measurement, Trans. On Measurement, vol. 32, 2002, pp.1-6.

DOI: 10.1016/s0263-2241(01)00056-2

[6] M. Aiello, A. Cataliotti, and S. Nuccio, A PC-based instrument for harmonics and interharmonics measurements in power supply systems, Trans. on Measurement, vol. 35, 2004, pp.371-380.

DOI: 10.1016/j.measurement.2004.03.005

[7] A. Lakshmikanth, M. Morcos, A Power Quality Monitoring System: A Case of Study in DSP-based Solutions for Power Electronics, IEEETrans. on Instrumentation and Measurement, Volume 50, no. 3, June 2001, pp.724-731.

DOI: 10.1109/19.930446

[8] XU Da-yu, LI Xian-yun, WANG Fang, MAO Xiao-hua. Research on the arithmetic of AC synchronous sampling of electric power parameters', Journal of Nanjing Institute of Technology (Natural Science Edition), 2005, Vol. 3：37-42.

[9] LIANG Yu-hong. Design of harmonic analyzer of electric net based on DSP',. Journal of Chongqing Institute of Technology (Natural Science Edition)，2010. 8，12（4）：127-131.

[10] Garcia, H.; Madrigal, M., Dynamic Harmonic Analysis of Transformers, ', Latin America Transactions, IEEE (Revista IEEE America Latina) , vol. 9, no. 7, p.1045, 1050, Dec. (2011).

DOI: 10.1109/tla.2011.6129701