Results 31 to 40 of about 29,133 (164)
Study on the Estimation of Utility Harmonic Impedance Based on Minimum Norm of Impedance Difference [PDF]
IEEE Access, 2020 The existing methods for estimating harmonic impedance usually assume that harmonic impedance is constant in a measurement period. However, for a variety of practical reasons, such as the load change of power grid, utility harmonic impedance may be changed. So a reasonable hypothesis is that utility harmonic impedance is time-varying, but the variation
Fangwei Xu +5 more
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Three Phase Linear State Estimation Method of Substation Based on Zero Impedance Model
IEEE Access, 2023 In order to improve the ability to detect and identify topological errors and measurement errors, and further enhance the rapidity and reliability of substation state estimation, this paper proposes a three-phase linear state estimation method for ...
Jifang Li +4 more
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Developments in the Built Environment, 2023 Traditional impedance-based bolt-looseness monitoring approaches using hand-crafted impedance features can lead to difficulties in quantitative damage severity estimation.
Thanh-Truong Nguyen +4 more
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Utility harmonic impedance estimation based on mutual information and data optimization
电力工程技术, 2023 Accurate calculation of harmonic impedance is the premise of harmonic control and reasonable division of harmonic responsibility. The existing harmonic impedance estimation methods should meet the conditions that the background harmonic fluctuations are ...
XU Fangwei +5 more
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Engineering ProceedingsAn active (harmonic-injection based) fault detection device, relevant to low voltage electrical installations is studied in this paper. This compact and flexible device is compatible with TN/TT earthing systems, and it is capable of detecting power theft
Christos Pechlivanis +5 more
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A Fast Lithium-Ion Battery Impedance and SOC Estimation Method Based on Two-Stage PI Observer
World Electric Vehicle Journal, 2021 Due to the complex changes in battery state, the accurate and fast estimation of battery state of charge (SOC) is still a great challenge. Here, a fast estimation method of battery impedance and SOC based on a multi-level PI observer is proposed.
Tao Chen +3 more
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On the Detection of Neutral Loss, Islanding, and Meter Tampering in Electrical Installations
IEEE Open Journal of the Industrial Electronics SocietyNeutral conductor loss on the upstream network of an electrical installation, as well as unintentional islanding operation, are two critical issues directly related to the safety of both human life and equipment of the electrical installation ...
Syllas Frantzeskakis +3 more
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Grid Impedance Estimator for Active Multisource AC Grids
IEEE Transactions on Smart Grid, 2023 Research, Technological Development and Innovation Program Oriented to the Society Challenges of the Spanish Ministry of Economy and Competitiveness [MCIN/AEI/10.13039/501100011033, MCI-20-PID2019-111051RB-I00]; European Union through ERFD Structural Funds (FEDER) through H2020 Research and Innovation programme [864459 (UE-19-TALENT-864459)]
Andrés Suárez +4 more
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Compensating for evanescent modes and estimating characteristic impedance in waveguide acoustic impedance measurements [PDF]
The Journal of the Acoustical Society of America, 2017 The ear-canal acoustic impedance and reflectance are useful for assessing conductive hearing disorders and calibrating stimulus levels in situ. However, such probe-based measurements are affected by errors due to the presence of evanescent modes and incorrect estimates or assumptions regarding characteristic impedance.
Kren Rahbek, Nørgaard +2 more
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A Method for Accurate Transmission Line Impedance Parameter Estimation [PDF]
IEEE Transactions on Instrumentation and Measurement, 2016 Real-time estimation of power transmission line impedance parameters has become possible with the availability of synchronized phasor (synchrophasor) measurements of voltage and current. If sufficiently accurate, the estimated parameter values are a powerful tool for improving the performance of a range of power system monitoring, protection, and ...
Deborah Ritzmann +3 more
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