A5046300689- Analog and Mixed-Signal Circuit Design
- Electrical and Bioimpedance Tomography
- Analytical Chemistry and Sensors
- Sensor Technology and Measurement Systems
- Smart Grid and Power Systems
- Electrical Contact Performance and Analysis
- CCD and CMOS Imaging Sensors
- Power Systems and Technologies
- Power Systems and Renewable Energy
- Railway Systems and Energy Efficiency
- Power Systems Fault Detection
- Magnetic Field Sensors Techniques
- Thermal Analysis in Power Transmission
- Silicon Carbide Semiconductor Technologies
- Electric Power Systems and Control
- Islanding Detection in Power Systems
- Advanced Electrical Measurement Techniques
- Induction Heating and Inverter Technology
- High voltage insulation and dielectric phenomena
- Advancements in Semiconductor Devices and Circuit Design
- Low-power high-performance VLSI design
- Smart Grid Security and Resilience
- Embedded Systems and FPGA Design
- Electrostatic Discharge in Electronics
Northwestern Polytechnical University
2024
Delft University of Technology
2015-2018
State Key Laboratory of Electrical Insulation and Power Equipment
2017
Southwest Jiaotong University
2013
Chinese Academy of Sciences
2012
This paper presents a high-resolution 110dB SNR ΔΣ ADC that achieves ±30V input common-mode voltage range (CMVR) while powered from single 5V supply. beyond-the-rails capability is obtained by employing capacitively coupled high-voltage (HV) chopper at the of switched-capacitor (SC) ADC. Furthermore, use correlated double sampling and system-level chopping results in maximum offset 8uV over full CMVR. In contrast to recent HV [1], exhibits 30dB more resolution, its CMVR extends below negative rail.
This paper presents a fully integrated shunt-based current sensor that supports 25-V input common-mode range while operating from single 1.5-V supply. It uses high-voltage beyond-the-rails ADC to directly digitize the voltage across an on-chip shunt resistor. To compensate for shunt's large temperature coefficient of resistance (~0.335%/°C), employs proportional-to-absolute-temperature reference. analog compensation scheme obviates need explicit and calibration logic required by digital...
This letter presents the most accurate shunt-based high-side current sensor ever reported. It achieves a 25 V input common-mode range from single 1.8-V supply by using beyond-the-rails ADC. A hybrid analog/digital temperature compensation scheme is proposed to simplify circuit implementation while maintaining state-of-the-art accuracy. Over ±12-A range, exhibits 0.35% gain error -40 °C 85 with 3× better power efficiency.
This paper presents a fully integrated ±4A current sensor that supports 25V input common-mode voltage range (CMVR) while operating from single 1.5V supply. It consists of an on-chip metal shunt, beyond-the-rails ADC [1] and temperature-dependent reference. The facilitates high-side sensing without the need for external resistive dividers or level shifters, thus reducing power consumption system complexity. To compensate shunt's temperature dependence, employs...
As cable insulation failure usually started with PD activity, a detection system based on pulse current was built to study the characteristics of typical defects in XLPE cable. To facilitate test, oil cup test terminal used. Considering installation procedure, three different kinds accessory samples were made, which knife incision defect, metal floating potential defect and misplaced stress cone defect. Under long time power frequency voltage U <sub...
Aiming at the complex electromagnetic transient process of EMU passing by phase-separation with electric load in high-speed railway, mechanism overvoltage caused switching off, on and impact current is analyzed systematically this article.π-type equivalent circuit feeding section put forward analysis mechanism.Overvoltage overcurrent model are also built.Correctness was validated simulation.In addition, methods to solve influence substations, transformers protection devices forward, which...
This paper presents a 15-bit ΔΣ ADC with 10kHz-BW which can handle 30V CM voltages high AC CMRR (in excess of 115dB at 10kHz) while operating from 1.8 V supply. An HV capacitively-coupled chopper its input enables the accurate sampling signals beyond supply rails. Chopping is used to mitigate ADC's offset and enhance CMRR, especially frequencies.
This paper presents a low power, area-efficient feedforward double-sampling sigma delta modulator. A novel double sampled structure that combines two techniques was proposed. The DAC capacitor reset technique is used to eliminate the noise folding caused by mis match between sampling branches; direct summation scheme obviates analog adder in front of quantizer, which greatly relaxes timing constraints path. modulator implemented SMIC 0.18um technology; simulation results show provides...
This paper presents an NPN-based temperature sensor intended for the compensation of metal shunt resistor integrated current sensing system. The was implemented in a 0.18 HV BCD CMOS technology and occupies 0.16mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> After one-point trim, its inaccuracy is less than ±0.4°C over industrial range (-40°C to 85°C). It also achieves 14.8niK resolution 7ms conversion time while consuming 12μm....
This article describes the principles and characteristics of wireless temperature measurement technology build a real-time online monitoring system.The sensor is installed in contact point distribution transformer to measure temperature.Real-time data obtained through remote network with varying point.Guide bar leads cable line ensure security electricity supply transformers.The system applied practice cases significant effect economic benefits.
From a background of domestic electric power enterprise distribution network state maintenance, State maintenance for the development status quo and situation at home abroad, Overhaul technology management experience combined with network, Explore grid equipment condition based application in future.
In recent years, in order to improve the efficiency of urban power supply, automatic reclosing operation is gradually applied XLPE cable-OHL mixed line. Operation experience shows that grounding fault occurred overhead line, most cases, instantaneous and success rate high. The cable line almost permanent quite low. this paper, a typical network was built PSCAD software. amplitude-frequency characteristics overvoltage, caused by single-phase segment segment, were studied. And characteristic...