Abstract
In this study, we mitigated the harmonic voltage in a power system that contained the roughing mill (RM) and finishing mill (FM) motor drives. AC/DC converter type RM drive is a non-linear, large-capacity varying load that adversely affects power quality, e.g., a flicker, voltage distortion, etc. The voltage drop can be compensated within a certain limit by using the proper capacity of a power capacitor bank. In addition, the voltage distortion can be controlled as per the guidelines of IEEE Std. 519 using the passive harmonic filter corresponding to the characteristic harmonics of the motor drive load. The passive harmonic filter can provide an economical solution by mitigating the harmonic distortion with a proper reactive power supply. However, at the planning level, attention should be paid to avoid system overvoltage that is caused by the leading power under light load conditions and also the problem of parallel resonance between the harmonic filter and the step-down transformer. In addition, when designing the filter reactor, the K-factor and peak voltage must be considered; the filter capacitor also requires a dielectric material that considers the harmonic peak voltage. The purpose of this study was to acquire a better understanding of the filter applications as well as verify the field measurement, analysis, and design of harmonic filters together with its performance.
Highlights
The plate, in this paper, refers to an iron plate that is made by rolling an intermediate slab obtained through the iron-manufacturing process or the steel-manufacturing process.It is usually a steel plate with a thickness of at least 6 mm that is difficult to process and is generally used in the manufacturing of ships, bridges, boiler pressure vessels, etc
This development process has been extended to the cyclo-converter, rectifier-pulse width modulation (PWM) inverter, and active rectifier-PWM inverter [1]
It cannot be done without considering the economics of installing filters for harmonic It cannot considering the economics of installing for including harmonic mitigation in be thedone mill without power system
Summary
The plate, in this paper, refers to an iron plate that is made by rolling an intermediate slab obtained through the iron-manufacturing process or the steel-manufacturing process.It is usually a steel plate with a thickness of at least 6 mm that is difficult to process and is generally used in the manufacturing of ships, bridges, boiler pressure vessels, etc. Owing to the characteristics of speed and torque control, a Ward Leonard, mercury arc, and thyristor converter have been used in the past. In recent years, this development process has been extended to the cyclo-converter, rectifier-pulse width modulation (PWM) inverter, and active rectifier-PWM inverter [1]. The rolling mill for plate processing is operated in the acceleration speed, pass, and idling modes. To satisfy these characteristics, precise control performance of constant torque and braking characteristics are required in response to a wide speed control range and whirlwind overload. The measured apparent (S), active (P), and reactive powers (Q) of the plate mill system are red, green, and blue, respectively
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