The Effects of Power System Harmonics on Power System Equipment and Loads

Ortmeyer, T.H.; Chakravarthi, K. R.; Mahmoud, Aly A.

doi:10.1109/mper.1985.5526463

Cited by 102 publications

(29 citation statements)

References 18 publications

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“…RLM algorithms involve more complicated mathematical operations and require much computational resources. The accuracy is also limited for RLS, LMS class of algorithms [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Kalman Filter Algorithm for Mitigation of Power System Harmonics

Dhineshkumar¹,

Subramani²

2018

IJECE

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<p>The maiden application of a variant of Kalman Filter (KF) algorithms known as Local Ensemble Transform Kalman Filter (LET-KF) are used for mitigation and estimation power system harmonics are proposed in this paper. The proposed algorithm is applied for estimating the harmonic parameters of power signal containing harmonics, sub-harmonics and inter-harmonics in presence of random noise. The KF group of algorithms are tested and applied for both stationary as well as dynamic signal containing harmonics. The proposed LET-KF algorithm is compared with conventional KF based algorithms like KF, Ensemble Kalman Filter (En-KF) algorithms for harmonic estimation with the random noise values 0.001, 0.05 and 0.1. Among these three noises, 0.01 random noise results will give better than other two noises. Because the phase deviation and amplitude deviation less in 0.01 random noise. The proposed algorithm gives the better results to improve the efficiency and accuracy in terms of simplicity and computational features. Hence there are less multiplicative operations, which reduce the rounding errors. It is also less expensive as it reduces the requirement of storing large matrices, such as the Kalman gain matrix used in other KF based methods.</p>

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“…RLM algorithms involve more complicated mathematical operations and require much computational resources. The accuracy is also limited for RLS, LMS class of algorithms [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Kalman Filter Algorithm for Mitigation of Power System Harmonics

Dhineshkumar¹,

Subramani²

2018

IJECE

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“…Applications of power electronic type devices are increasing by a significant way in all power system applications, these applications have non-linear voltage-current characteristics, which results in increasing harmonics in the power systems (H. Ortmeyer, 1985) Nowadays, a high concern to power quality is the harmonic distortions of voltage and current waveforms. The ideal power supply is characterized by perfect sinusoidal waveforms of voltage and current.…”

Section: Introductionmentioning

confidence: 99%

“…1. The harmful effects of harmonic distortions are: (H. Ortmeyer, 1985), (Serb, 2016), (Qiu Hongbo, 2015) 1) Increase stress on insulation due to voltage effects. 2) Thermal stress and overheating to electric machines, capacitors, and solid state equipment.…”

Section: Introductionmentioning

confidence: 99%

Studying the Effect of Non-Linear Loads Harmonics on Electric Generator Power Rating Selection

Sebaay

Ramadan

Adma

2017

ESJ

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Non-linear loads connected to an electric power system produce Harmonic currents, harmonics are introduced into the system in the form of currents whose frequencies are the integral multiples of the fundamental power system frequency (50/60 Hz). The harmonic currents interact with the supply system impedance causing distortions in supply output voltage and current, which has a very bad effect on all other loads connected to the system and the power supply itself, such as overheating, increasing powers losses in the system, and malfunction of protection and control devices connected to the system. This paper presents a study to analyze the effect of voltage and current harmonics resulting from non-linear loads such as variable frequency drive, uninterruptable power supply, and battery chargers on operation and power rating of synchronous generator. The study introduces an optimized method for selecting the suitable generator power rating to withstand harmful harmonics effects for a safe operation of the generator, saving its lifetime, and to improve the power quality of the power system. The method depends on analyzing the effect of increasing the supply generator power rating on the THVD produced from non-linear loads harmonics connected to the system. By calculating the THVD for each case of a generator power rating, a mathematical relationship between generator power rating and TVHD can be found. So, the relationship between generator power rating and total harmonic distortion in the power system will be discussed clearly.

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“…The Fast Fourier Transform (FFT) is the most widely used for harmonic analysis of electric power system [1][2][3][4][5] . However, because of the grid effect and energy leakage of FFT, the estimations of the signal parameters, including frequencies, amplitudes and phases are not accurate.…”

Section: Introductionmentioning

confidence: 99%

An improved optimize method for power harmonics analysis based on windowed double-spectrum-line interpolation

Jiang

Chen

2016

Journal of Interdisciplinary Mathematics

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Double-spectrum-line interpolation could effectually decrease the frequency spectral leakage caused by non-synchronized sampling and non-integral period truncation in harmonics analysis; however, this algorithm is not complicated and facilitates the realization in embedded system. Some parameters of interpolation polynomials in windowed Double-spectrum-line interpolation are given along with a developed formula of phase. An optimized method is also proposed which enhances real-time performance by decreasing periods of sample. A program flow chart is provided in this paper. The precision range is obviously inhibited under frequency variation. The simulation of a complex signal with 21 order harmonics verifies the effectiveness of the method.

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The Effects of Power System Harmonics on Power System Equipment and Loads

Cited by 102 publications

References 18 publications

Kalman Filter Algorithm for Mitigation of Power System Harmonics

Kalman Filter Algorithm for Mitigation of Power System Harmonics

Studying the Effect of Non-Linear Loads Harmonics on Electric Generator Power Rating Selection

An improved optimize method for power harmonics analysis based on windowed double-spectrum-line interpolation

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