Analysis of the Behavior of the 5th Harmonic over Power Transmission Lines
- 1 October 2018
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
With the diffusion in the use of equipment based on power electronics, not only in industry but also and especially in home appliances, harmonic pollution has become a real concern for power systems operation, by including power transmission lines. For addressing this new important issue, analyses through simulations cannot be based on a formerly key simplifying assumption that consists in taking a unique Pi circuit for modelling a transmission line. Thus, based on these concerns, the authors present through examples on a real 230 kV transmission line and with the help of an analytical methodology how to predicting the behavior of power harmonics over the whole length of a line. For its turn, even though many harmonics are supposed to coexist over the line operation, this study is focused on the 5 th harmonic due to its importance for being the harmonic of negative sequence with the most likely presence in power transmission systems. Thus, for the solely presence of the 5 th harmonic changes in the current amplitude, impedance angle and direction of power flow are performed for showing the consequences in the behavior of the harmonic amplitude of current and voltage over the whole line length. The most significant result is that harmonic analyses can be performed separately from the power frequency and for each of the harmonics with a real ratio of voltage to current. Thus, each of the obtained results can be superimposed to the result at power frequency for giving an overall insight of the influence of power harmonics on the performance ot power transmission line under steady state.Keywords
This publication has 6 references indexed in Scilit:
- Frequency-dependent models of overhead power lines for steady-state harmonic analysis: Model derivation, evaluation and practical applicationsElectric Power Systems Research, 2017
- A practical application of an analytical method for modeling power transmission linesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2017
- Research on transmission line power losses effected by harmonicsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2016
- Evaluation of Steady State Voltage and Current per Phase of Power Transmission LinesIEEE Latin America Transactions, 2015
- Study of occurrence of overvoltage along power transmission lines with acceptable end voltagePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2015
- The role of the distribution transformer in the transference of voltage surgesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2010