A Fast Response Device for Measurement of Power, Reactive Power, Volt-Amperes and Power Factor

Kuppurajulu, A.; Majhee, P. C.

doi:10.1109/tpas.1971.293009

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…Filtered outputs I 1 and I rms are then applied to the ADC channels of a microcontroller for A/D conversion. The digital value that results is used afterwards for determining PF value according to expression (9). A LCD, driven by microcontroller, can display the real time value of PF as well as its lead/lag nature.…”

Section: Power Factor Definitionmentioning

confidence: 99%

“…The most conventional approach to measuring PF is the use of an electromechanical power factor meter [4] which is only accurate for the sinusoidal case [5]. A number of analog electronic circuits for PF measurement are proposed in [6][7][8][9]; however, these systems are incapable of determining lead/lag discrimination of a PF nature. Another approach to measuring PF is reported in [10] which is only developed for sinusoidal cases.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we have developed a simple and computationally efficient method for real-time measurements of PF under nonlinear load current conditions. A system has been proposed that is capable of measuring a PF value and its nature from zero PF lagging through unity PF up to zero PF leading -contrasted to some of the early systems proposed in [6][7][8][9]. Unlike the commercial equipment available for this purpose [15], the proposed method does not require complex computations like those included in harmonic analysis.…”

Section: Introductionmentioning

confidence: 99%

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Design of a Power Factor Measurement System for Nonlinear Load

Shahriar¹,

Chong²

2011

Journal of the Korean Institute of Illuminating and Electrical

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This paper introduces and develops an efficient method for measuring power factor (PF) and its nature under nonlinear load current situations. The method is based on generating a pulse width modulated signal whose width correlates to the value of PF. This signal can then be employed as a feedback signal for controlling PF related power quantities in a system. This method has the advantages of its simple implementation, less computational complexity, and its allowable error of less than 4[%], which is justified by the computer simulation results.

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Section: Power Factor Definitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of a Power Factor Measurement System for Nonlinear Load

Shahriar¹,

Chong²

2011

Journal of the Korean Institute of Illuminating and Electrical

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“…Power factor is an important performance index in research on power quality. The traditional electromechanical power factor meter possesses the drawback of large size, heavy weight, and slow response [1,2]. Hence, it is not suitable for use in systems which require rapid transient response.…”

Section: Introductionmentioning

confidence: 99%

A Quick Response Power Factor Detector for Nonlinear Loads

Jiang

Shih

2013

AMM

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A fast power factor detector for nonlinear loads is proposed to overcome the drawback of conventional detectors, which can measure only the power factor of linear loads. The design of the proposed detector is based on the concept of additional characteristic of trigonometric function. It does not require any low-pass filter or integrator. Therefore, the transient response of the proposed detector is much faster than that of the conventional detectors. The theoretical response time of the proposed detector is less than one-fourth of a cycle. Because of its promising accuracy and rapid transient response, it can be used in many systems such as the control of power systems, and active power filters, to improve their transient performance. Theoretical analysis and experimental results are also detailed in this paper.

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