Novel Method of Error Current Compensation for Hall-Effect-Based High-Accuracy Current Transformer

Xin, Ai; Bao, Hai; Song, Yun Heub

doi:10.1109/tpwrd.2004.837820

Cited by 24 publications

(6 citation statements)

References 8 publications

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“…Some of them make use of an auxiliary winding on the core, which aims at producing a MagnetoMotive Force (MMF) proportional to the resultant primary and secondary MMFs in the secondary circuit. The auxiliary MMF, then, opposes the MMF of the magnetizing current, tending so to cancel the flux in the core [2][3][4][5][6][7]. In this approach it is necessary to operate on the transformer and change its configuration, by adding another circuit.…”

Section: Introductionmentioning

confidence: 99%

Compensation of Current Transformers

Baccigalupi

Liccardo

2007

2007 IEEE Instrumentation &Amp; Measurement Technology Conference IMTC 2007

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In the paper a method for the compensation of current transformer is proposed The method is based on two main steps: (i) the realization of an equivalent short circuit so that the magnetizing current Io is not dependent from the burden resistance; (ii) a circuit generating a compensating voltage vc which compensate the voltage drop across the longitudinalparameters ofthe transformer. Since the developed transducer is a non-conventional transformer with the secondary nominal current of5A, it is not possible to measure the phase and ratio error with a comparison method. At this aim, a technique for measuring the transformer error by means ofa data acquisition system is also proposed in the paper.

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Section: Introductionmentioning

confidence: 99%

Compensation of Current Transformers

Baccigalupi

Liccardo

2007

2007 IEEE Instrumentation &Amp; Measurement Technology Conference IMTC 2007

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“…Normally, the measurement errors mainly contain systematic errors and random errors. The systematic errors can be corrected by proofreading and compensation [35]. However, the random errors are usually caused by a variety of complex internal and external interferences during the measurement process, which are hard to avoid.…”

Section: A Analysis Of Noise Immunitymentioning

confidence: 99%

Submodule Capacitance Monitoring Strategy for Phase-Shifted Carrier Pulsewidth-Modulation-Based Modular Multilevel Converters

Liu

Deng

et al. 2021

IEEE Trans. Ind. Electron.

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The capacitance monitoring is one of the important issues for the MMC to obtain high reliability. Since the pulse-width modulation (PWM) is usually implemented in the Field Programmable Gate Array (FPGA), the produced precise switching states in the FPGA cannot be directly access by the top Digital Signal Processor (DSP) controller, which poses challenges on the existing capacitance monitoring methods based on the precise switching states of the MMC. This paper presents a submodule (SM) capacitance monitoring strategy for the MMC with a simple algorithm, where the fundamental frequency components of the SM capacitor voltage and current are extracted to estimate the SM capacitance based on reference, but not the precise switching states. The proposed scheme not only simplifies the implementation and calculation, but also avoids control limitations and heavy communication burden between DSP and FPGA. Besides, the proposed strategy effectively eliminates noise impact from sensors and increases accuracy. Simulation and experimental studies are implemented, and the results confirm the effectiveness of the proposed strategy. 1 Index terms-Capacitance monitoring, modular multilevel converters, reliability, PSC-PWM, submodule I. INTRODUCTIONThe modular multilevel converter (MMC) has drawn considerable interests due to its advantages of modularity, scalability, high efficiency, low harmonic content and fault tolerance [1]- [3]. A multilevel voltage can be synthetized with the operation of the MMC and the SM switching frequency can be reduced without compromising the power quality [4]. Recently, the MMC is more attractive for renewable energy integration, medium-voltage motor drives, and electric railway supplies [5]- [7].The capacitor is one of the fragile components in the MMC [8]. Due to high energy density and low price [9], the

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“…Pankau J [5] regarded the magnetic parts of the sensor as a single-phase transformer, and then adopted the equivalent circuit model to realize the high-frequency modeling and accomplish the field-circuit combined simulation. Pejovic P [6] and Ai X [7] took the sensor as a current transformer and established the equivalent circuit model through the transformation function, and accordingly conducted transient analysis on the low-frequency characteristics and sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of Magnetic Balance Current Sensor Based on Magnetic Scalar Potential Volume Integral

Luo

Huang

et al. 2022

Electronics

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In this paper, a field–circuit combined simulation method, based on the magnetic scalar potential volume integral equation (MSP-VIE) and its fast algorithms, are proposed for the transient simulation and nonlinear distortion analysis of the magnetic balance current sensor. The magnetic part of the sensor is modeled and simulated by MSP-VIE with the field matrices extracted by the method of moments. By directly implementing the magnetic field equation in the circuit, these field matrices can be regarded as equivalent circuit parameters of the magnetic part, to construct the corresponding SPICE model. Finally, the field–circuit combined model of the entire sensor is unified in a circuit, so with the SPICE solver, the transient simulation is accomplished in the time domain. Moreover, aiming at the time-consuming problem, this paper presents a corresponding fast method to accelerate the simulation. The comparison of measurement and simulation demonstrates that the proposed method not only realizes the transient simulation of the whole sensor, but also simulates some hidden performance details; thus, it can be applied to practical engineering, to guide and test the early design of the product.

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Novel Method of Error Current Compensation for Hall-Effect-Based High-Accuracy Current Transformer

Cited by 24 publications

References 8 publications

Compensation of Current Transformers

Compensation of Current Transformers

Submodule Capacitance Monitoring Strategy for Phase-Shifted Carrier Pulsewidth-Modulation-Based Modular Multilevel Converters

Modeling and Simulation of Magnetic Balance Current Sensor Based on Magnetic Scalar Potential Volume Integral

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