23 citations · 62 across the 27 of their papers we have counts for
27 papers
A Linearization of DFT Spectrum for Precision Power Measurement in Presence of Interharmonics
Jian Liu, Wei Zhao, Jianting Zhao +1
The presence of interharmonics in power systems can lead to asynchronous sampling, a phenomenon further aggravated by shifts in the fundamental frequency, which significantly degra…
Design of a Miniature Kibble Balance for Kilogram-Scale Mass Calibration -- KBmini
Shisong Li, Nanjia Li, Weibo Liu +3
Tabletop version Kibble balances are a significant developing trend for mass realizations following the revised International System of Units. A key innovation through the miniatur…
Self-Error Correcting Method for Magnetic-Array-Type Current Sensors in Multi-Core Cable Applications
Xiaohu Liu, Keyu Hou, Kang Ma +7
Data-driven methods enable online assessment of error states in magnetic-array-type current sensors, and long-term measurement stability can be enhanced through further self-error…
An Approach for Restoring Magnetic Field Uniformity in Openable BIPM-Type Kibble Balance Magnets
Nanjia Li, Weibo Liu, Yongchao Ma +3
The Kibble balance realizes the kilogram by linking mechanical and electrical quantities via a magnet system. In an improved BIPM-type magnet design by Tsinghua University, an open…
An Evaluation of External Magnetic Flux Error in Magnet-Moving Kibble balances
Yongchao Ma, Wei Zhao, Songling Huang +1
The magnet-moving measurement scheme in Kibble balances avoids displacing force-sensitive components, such as the weighing cell, and enables a broader magnetic profile measurement…
Metering Error Estimation of Fast-Charging Stations Using Charging Data Analytics
Kang Ma, Xiulan Liu, Xi Chen +5
Accurate electric energy metering (EEM) of fast charging stations (FCSs), serving as critical infrastructure in the electric vehicle (EV) industry and as significant carriers of ve…
Compressive Sensing Empirical Wavelet Transform for Frequency-Banded Power Measurement Considering Interharmonics
Jian Liu, Wei Zhao, Shisong Li
Power measurement algorithms based on Fourier transform are susceptible to errors caused by interharmonics, while wavelet transform algorithms are particularly sensitive to even ha…
Precision Control of Resistive Power in Kibble Balance Coils: An Advanced Method for Minimizing Temperature-Related Magnetic Errors
Weibo Liu, Stephan Schlamminger, Shisong Li
Temperature changes affect the coercivity of permanent magnets, thereby impacting the factor and potentially introducing systematic errors in Kibble balance measurements. Whil…
Updates on the Tsinghua Tabletop Kibble Balance
Shisong Li, Yongchao Ma, Kang Ma +7
With the adoption of the revised International System of Units (SI), the Kibble balance has become a pivotal instrument for mass calibrations against the Planck constant, . One…
A Compact Magnet System for the Tsinghua Tabletop Kibble Balance
Yongchao Ma, Nanjia Li, Weibo Liu +4
Although the so-called magnetic geometrical factor, , of a Kibble balance does not appear in the Kibble equations, it offers the precision link between electrical and mechanica…
A Bi-polar Current Source with High Short-term Stability for Tsinghua Tabletop Kibble Balance
Kang Ma, Xiaohu Liu, Wei Zhao +2
A high-precision current source, capable of supporting weighing measurements with a relative uncertainty at the level, is essential for Kibble balance experiments. Howeve…
A Determination of the Local Gravitational Acceleration for the Tsinghua Tabletop Kibble Balance
Weibo Liu, Nanjia Li, Yongchao Ma +5
The Kibble balance requires a measurement of the local gravitational acceleration, , with a typical relative measurement uncertainty of . In this paper, the determinati…
A Self-Healing Magnetic-Array-Type Current Sensor with Data-Driven Identification of Abnormal Magnetic Measurement Units
Xiaohu Liu, Kang Ma, Jian Liu +4
Magnetic-array-type current sensors have garnered increasing popularity owing to their notable advantages, including broadband functionality, a large dynamic range, cost-effectiven…
Design of the Tsinghua Tabletop Kibble Balance
Shisong Li, Yongchao Ma, Wei Zhao +2
The Kibble balance is a precision instrument for realizing the mass unit, the kilogram, in the new international system of units (SI). In recent years, an important trend for Kibbl…
A SVD-based Dynamic Harmonic Phasor Estimator with Improved Suppression of Out-of-Band Interference
Dongfang Zhao, Shisong Li, Fuping Wang +3
The diffusion of nonlinear loads and power electronic devices in power systems deteriorates the signal environment and increases the difficulty of measuring harmonic phasors. Consi…
Calculation of magnetic forces and torques on the Kibble coil
Stephan Schlamminger, Lorenz Keck, Frank Seifert +3
Analytically the forces and torques on a coil in a field of magnetic flux density can be calculated one of two ways. The line integral can be conducted along the coil's wire, summi…
Magnetic Uncertainties for Compact Kibble Balances: An Investigation
Shisong Li, Stephan Schlamminger
The Kibble balance has become one of the major instruments for realizing the mass unit, the kilogram, in the revised international system of units (SI). Researchers at about a doze…
The irony of the magnet system for Kibble balances -- a review
Shisong Li, Stephan Schlamminger
The magnet system is an essential component of the Kibble balance, a device that is used to realize the unit of mass. It is the source of the magnetic flux, and its importance is c…
A SVD-Based Synchrophasor Estimator for P-class PMUs with Improved Immune from Interharmonic Tones
Dongfang Zhao, Fuping Wang, Shisong Li +3
The increasing use of renewable generation, power electronic devices, and nonlinear loads in power systems brings more severe interharmonic tones to the measurand, which can increa…
A Two-Stage Wavelet Decomposition Method for Instantaneous Power Quality Indices Estimation Considering Interharmonics and Transient Disturbances
Yiqing Yu, Wei Zhao, Shisong Li +1
As the complexity increases in modern power systems, power quality analysis considering interharmonics has become a challenging and important task. This paper proposes a novel deco…
From to : A Survey of Major Impacts for Electrical Measurements in Recent SI Revision
Shisong Li, Qing Wang, Wei Zhao +1
A milestone revision of the International System of Units (SI) was made at the 26th General Conference on Weights and Measures that four of the seven SI base units, i.e. kilogram,…
A Simple Improvement for Permanent Magnet Systems for Kibble Balances: More Flat Field at Almost No Cost
Shisong Li, Stephan Schlamminger, Qing Wang
Permanent magnets together with yokes to concentrate the magnetic flux into a cylindrical air-gap are widely employed in Kibble balances. These experiments require a uniform magnet…
An Investigation of Magnetic Hysteresis Error in Kibble Balances
Shisong Li, Franck Bielsa, Michael Stock +2
Yoke-based permanent magnetic circuits are widely used in Kibble balance experiments. In these magnetic systems, the coil current, with positive and negative signs in two steps of…
A discussion of conservation on a two dimensional magnetic field plane in watt balances
Shisong Li, Wei Zhao, Songling Huang
The watt balance is an experiment being pursued in national metrology institutes for precision determination of the Planck constant . In watt balances, the magnetic field,…