Coupled Harmonic Admittance Identification Based on Least Square Estimation

Li, Yaqiong; Deng, Zhanfeng; Wang, Tongxun; Zhao, Guoliang; Zhou, Shengjun

doi:10.3390/en11102600

Cited by 8 publications

(5 citation statements)

References 36 publications

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“…In this paper, a hybrid of statistical technique Least square method (LSM) [43] and a meta-heuristic technique GWO is proposed to solve the HE problem. The purpose of hybridizing two different nature techniques is to minimize the computational burden, increasing computational efficiency and accurate estimation of harmonics.…”

Section: Hybrid Gwo-ls Harmonic Estimatormentioning

confidence: 99%

“…To validate the performance of presented estimator in approximating dynamic parameters, a short transient is produced in 5th harmonic from 0.12 s to 0.26 s. The simulation parameters for the HE problem and GWO-LS are stated in Table 3. These values are taken from the literature harmonic estimators [3,39,43]. Moreover, the parametric values of Table 3 are selected in such a way so that a fair comparison between the proposed and literature harmonic estimator can be performed.…”

Section: Test System I: Estimation Of Integral Harmonics Without Incl...mentioning

confidence: 99%

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A Novel Hybrid GWO-LS Estimator for Harmonic Estimation Problem in Time Varying Noisy Environment

et al. 2021

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The power quality of the Electrical Power System (EPS) is greatly affected by electrical harmonics. Hence, accurate and proper estimation of electrical harmonics is essential to design appropriate filters for mitigation of harmonics and their associated effects on the power quality of EPS. This paper presents a novel statistical (Least Square) and meta-heuristic (Grey wolf optimizer) based hybrid technique for accurate detection and estimation of electrical harmonics with minimum computational time. The non-linear part (phase and frequency) of harmonics is estimated using GWO, while the linear part (amplitude) is estimated using the LS method. Furthermore, harmonics having transients are also estimated using proposed harmonic estimators. The effectiveness of the proposed harmonic estimator is evaluated using various case studies. Comparing the proposed approach with other harmonic estimation techniques demonstrates that it has a minimum mean square error with less complexity and better computational efficiency.

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Section: Hybrid Gwo-ls Harmonic Estimatormentioning

confidence: 99%

Section: Test System I: Estimation Of Integral Harmonics Without Incl...mentioning

confidence: 99%

A Novel Hybrid GWO-LS Estimator for Harmonic Estimation Problem in Time Varying Noisy Environment

et al. 2021

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“…The works [28,29] also considered methods that require data on the harmonic power supply and consumer impedances, which complicates the calculation procedure and the possibility of application. Research is being conducted to improve methods for measuring the harmonic conductivity of the power supply system and consumers [30,31], which are divided into non-invasive and invasive ones. The latter quite accurately assesses the parameters of the system and consumers based on the generation of current harmonics (interharmonics) of a certain spectrum into the grid and subsequent measurement of the harmonic voltage.…”

Section: Introductionmentioning

confidence: 99%

Method for determining the harmonic contribution of consumer installations based on the application of passive filters

Skamyin

2024

IET Generation Trans & Dist

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The paper presents a new method for estimating the contribution of distortion sources based on the application of passive harmonic filters. The method does not require the measurement of harmonic network impedance and is based on the measurement of harmonic currents of the grid, consumers and passive harmonic filters. Evaluation of the consumer contribution using a passive harmonic filter is necessary to select the parameters and connection points for harmonic reduction devices. A feature of the method is the correct determination of share contributions, regardless of background harmonic distortions. Based on this method, a single consumer can evaluate both the harmonic contributions of its own loads, even in the presence of background distortions, and the harmonic voltage distortions in the case of installing harmonic reduction devices. The research results are confirmed in laboratory conditions with various combinations of electrical loads connected both at the grid side and at the consumer side. For such conditions, the proposed method was compared with existing methods, among which are methods based on the measurement of harmonic voltage vectors, harmonic current vectors and active harmonic power. The application of the developed method was demonstrated using the example of a gas production field.

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“…There are many ways to identify and locate the source of high harmonics [12][13][14]. Some of them are based on a calculation of the components of apparent power, such as distortion power [12], nonactive power [3], and nonfundamental apparent power according to the IEEE 1459-2010 standard [5].…”

Section: Introductionmentioning

confidence: 99%

Distortion Load Identification Based on the Application of Compensating Devices

et al. 2020

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The article provides an analysis of the existing methods of identifying the consumer's contribution to voltage distortion at a point of common coupling. The considered methods do not allow correctly and fairly determining the source of harmonic distortions, or they have limited application and difficulties in implementation. The paper proposes new methods for determining the source of high harmonics. The developed methods and techniques are based on the analysis of the grid operation modes with two connected consumers using compensating devices, such as reactive power compensation devices and passive harmonic filters. It is shown that the most promising method is the application of harmonic filters, which allows determining the share of the consumer's contribution to the voltage distortion. The present research is carried out using a computer simulation of the existing electrical grid, to which consumers with nonlinear electric load are connected. These methods can be implemented to assess the power quality and the shareholding of different consumers connected at the point of common coupling. Furthermore, such methods appear to be feasible, as almost every enterprise currently has such facilities in operation.

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Coupled Harmonic Admittance Identification Based on Least Square Estimation

Cited by 8 publications

References 36 publications

A Novel Hybrid GWO-LS Estimator for Harmonic Estimation Problem in Time Varying Noisy Environment

A Novel Hybrid GWO-LS Estimator for Harmonic Estimation Problem in Time Varying Noisy Environment

Method for determining the harmonic contribution of consumer installations based on the application of passive filters

Distortion Load Identification Based on the Application of Compensating Devices

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