Effect of Harmonic Power Fluctuation
World Academy of Science, Engineering and Technology 28 2007
The Effect of Harmonic Power Fluctuation for Estimating Flicker
Jin-Lung Guan, Ming-Ta Yang, Jhy-Cherng Gu, Hsin-Hung Chang, and Chin-Lung Huang
Abstract—Voltage flicker problems have long existed in several of the distribution areas served by the Taiwan Power Company. In the past, those research results indicating that the estimated ΔV10 value based on the conventional method is significantly smaller than the survey value. This paper is used to study the relationship between the voltage flicker problems and harmonic power variation for the power system with electric arc furnaces. This investigation discussed thought the effect of harmonic power fluctuation with flicker estimate value. The method of field measurement, statistics and simulation is used. The survey results demonstrate that ΔV10 estimate must account for the effect of harmonic power variation.
Keywords—Voltage Flicker, Harmonic Power, EAF. I. INTRODUCTION OLTAGE flicker is mainly caused by rapid change of loads in power systems, such as electric arc furnaces (EAF). During the operation of an EAF, the electric poles short circuit and an enormously unstable current is produced, causing current flow to change significantly, and in turn causing serious voltage flickers that influences neighboring power consumers. According to IEEE Std-100 [1], voltage flicker is luminosity variation or an image disruption caused by lower frequency voltage fluctuations. Power systems currently face serious problems arising from voltage flicker, which is an important threat to power quality [2], and is currently being targeted by the aggressive power supply quality improvement efforts of the Taiwan Power Company (TPC). Presently, the major source of flicker is the EAF used in steel making plants. Voltage flicker associated with an EAF is evaluated in two main ways around the world. The first is flicker meter, which is the IEC standard and has been
The Effect of Harmonic Power Fluctuation for Estimating Flicker
Jin-Lung Guan, Ming-Ta Yang, Jhy-Cherng Gu, Hsin-Hung Chang, and Chin-Lung Huang
Abstract—Voltage flicker problems have long existed in several of the distribution areas served by the Taiwan Power Company. In the past, those research results indicating that the estimated ΔV10 value based on the conventional method is significantly smaller than the survey value. This paper is used to study the relationship between the voltage flicker problems and harmonic power variation for the power system with electric arc furnaces. This investigation discussed thought the effect of harmonic power fluctuation with flicker estimate value. The method of field measurement, statistics and simulation is used. The survey results demonstrate that ΔV10 estimate must account for the effect of harmonic power variation.
Keywords—Voltage Flicker, Harmonic Power, EAF. I. INTRODUCTION OLTAGE flicker is mainly caused by rapid change of loads in power systems, such as electric arc furnaces (EAF). During the operation of an EAF, the electric poles short circuit and an enormously unstable current is produced, causing current flow to change significantly, and in turn causing serious voltage flickers that influences neighboring power consumers. According to IEEE Std-100 [1], voltage flicker is luminosity variation or an image disruption caused by lower frequency voltage fluctuations. Power systems currently face serious problems arising from voltage flicker, which is an important threat to power quality [2], and is currently being targeted by the aggressive power supply quality improvement efforts of the Taiwan Power Company (TPC). Presently, the major source of flicker is the EAF used in steel making plants. Voltage flicker associated with an EAF is evaluated in two main ways around the world. The first is flicker meter, which is the IEC standard and has been
References: [1] [2] IEEE Standard Dictionary of Electrical and Electronics Terms, IEEE Std. 100, 1984. G. T. Heydt, Electric Power Quality, Stars in a Circle Publication, Indiana, 1994. 205