Next Article in Journal
Distributed Load-Shedding System for Agent-Based Autonomous Microgrid Operations
Previous Article in Journal
Polarization Curve of a Non-Uniformly Aged PEM Fuel Cell
Open AccessArticle

Three-Phase Harmonic Analysis Method for Unbalanced Distribution Systems

1
Department of Electrical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
2
Department of Electrical Engineering, Cheng-Shiu University, Kaohsiung 83347, Taiwan
*
Author to whom correspondence should be addressed.
Energies 2014, 7(1), 365-384; https://doi.org/10.3390/en7010365
Received: 8 November 2013 / Revised: 18 December 2013 / Accepted: 9 January 2014 / Published: 20 January 2014
Due to the unbalanced features of distribution systems, a three-phase harmonic analysis method is essential to accurately analyze the harmonic impact on distribution systems. Moreover, harmonic analysis is the basic tool for harmonic filter design and harmonic resonance mitigation; therefore, the computational performance should also be efficient. An accurate and efficient three-phase harmonic analysis method for unbalanced distribution systems is proposed in this paper. The variations of bus voltages, bus current injections and branch currents affected by harmonic current injections can be analyzed by two relationship matrices developed from the topological characteristics of distribution systems. Some useful formulas are then derived to solve the three-phase harmonic propagation problem. After the harmonic propagation for each harmonic order is calculated, the total harmonic distortion (THD) for bus voltages can be calculated accordingly. The proposed method has better computational performance, since the time-consuming full admittance matrix inverse employed by the commonly-used harmonic analysis methods is not necessary in the solution procedure. In addition, the proposed method can provide novel viewpoints in calculating the branch currents and bus voltages under harmonic pollution which are vital for harmonic filter design. Test results demonstrate the effectiveness and efficiency of the proposed method. View Full-Text
Keywords: unbalanced distribution system; harmonic analysis; harmonic filter design; THD unbalanced distribution system; harmonic analysis; harmonic filter design; THD
MDPI and ACS Style

Teng, J.-H.; Liao, S.-H.; Leou, R.-C. Three-Phase Harmonic Analysis Method for Unbalanced Distribution Systems. Energies 2014, 7, 365-384.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop