Reactive power and harmonic compensation: A case study for the coal-mining industry

Roos, F.; Bansal, Ramesh C.

doi:10.17159/2413-3051/2019/v30i1a2473

Cited by 10 publications

(4 citation statements)

References 30 publications

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“…Apparent power is the product of the current and voltage of the circuit. Due to energy stored in the load and returned to the source, or due to a nonlinear load that distorts the wave shape of the current drawn from the source, the apparent power will be greater than the real power [4]. From the power vector diagram shown in Figure 4, the power factor can be defined as:…”

Section: Power Factormentioning

confidence: 99%

Microcontroller Control of Reactive Power Compensation for Growing Industrial Loads

Mbinkar¹,

Asoh²,

Kujabi³

2022

EPE

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Many industrial installations in developing countries start-up as small factories, without regard for the need of compensation of reactive power, leading to significant financial losses in the long term. By improving the power factor, the customer can reduce its power demand and potentially increase efficiency of their equipment. A PIC microcontroller is used to switch capacitor banks to compensate for the reactive power. In order to determine the size of the capacitor bank needed, the microcontroller calculates the phase difference between the voltage and the current. The results obtained based on the lagging power factor for three test loads show an improvement in the power factor from 0.52 to 0.96 under different test load conditions.

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Section: Power Factormentioning

confidence: 99%

Microcontroller Control of Reactive Power Compensation for Growing Industrial Loads

Mbinkar¹,

Asoh²,

Kujabi³

2022

EPE

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“…Harmonics can be classified as both current and voltage harmonics. Harmonic voltages occur as a result of current harmonics which are created by sensitive and nonlinear electronic loads [17,18]. These nonlinear loads draw a distorted current waveform that propagates back to the supply system.…”

Section: Harmonics Analysismentioning

confidence: 99%

“…The THD level of the load voltage and current is reduced to 1.10 % and 2.14% respectively which is under the IEEE standard limit. [17] 0.958 --Adejunobi, et al [18] 0.898 --Proposed (with Fuzzy based UPQC) 0.98 1.10 2.14…”

Section: Source Current Harmonics With Flcmentioning

confidence: 99%

Mitigation of Reactive Power and Harmonics in a Case of Industrial Customer

Aeggegn

Salau

Gebru

et al. 2022

JERA

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In most industrial plants, power quality is a major issue which hinders productivity and efficiency of the plants due to the use of semiconductor based loads and non-linear loads. As a result, to address the power quality problems in these industries, specialized power devices such as the Unified Power Quality Conditioner (UPQC), can be installed at the customer's location to resolve practically all power quality issues. UPQC consist of a series of active power filters (APF) which mitigate voltage quality issues and shunt active power filters which are used to reduce current quality issues, like harmonics and reactive power burdens. This paper, therefore presents an investigation and assessment of the power quality problems associated with Bahir Dar Textile Share Company. This was achieved by examining the voltage and current harmonic levels of various types of loads using PI and fuzzy logic controllers by measuring the level of total harmonic distortion (THD) with and without the insertion of the UPQC. The novelty of this paper is the implementation of the controller based customized UPQC for power factor and reactive power compensation. It was observed that by designing the system without and with UPQC, the results of the FFT analysis show that the fuzzy logic controller (FLC) reduced the harmonics level of the load voltage and current by 1.10% and 2.14% respectively. Generally, harmonics was alleviated by 90%, reactive power was reduced by 20%, and power factor was improved by 33%. Hence, the proposed UPQC is capable of holding the voltage and current harmonics levels within the acceptable limit, which satisfies the standards imposed by IEEE 519-1995.

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“…Furthermore, it should reduce the number of interruptions and disturbances in the operation of atmosphere parameter monitoring systems, thus increasing the level of safety of mine workers [53,54]. The application of HAPF yields financial benefits due to lowering power losses and slowing down the aging effects of appliances e.g., motor drives [55][56][57][58].…”

Section: Introductionmentioning

confidence: 99%

Control Strategy of 1 kV Hybrid Active Power Filter for Mining Applications

et al. 2021

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The paper presents a shunt hybrid active power filter for 1 kV mining applications in configuration with a single-tuned passive filter. The focus is on the method of controlling the filter, with particular emphasis on the influence of network voltage distortion and time delays in control on the effectiveness of harmonic reduction, which is one of the most important aspect of power quality. The low-power loss configuration of a hybrid filter with SiC transistors is shown, as well as the control algorithm which limits the influence of voltage distortion. Theoretical considerations are verified by results obtained from simulations and tests of the hybrid active power filter prototype.

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Reactive power and harmonic compensation: A case study for the coal-mining industry

Cited by 10 publications

References 30 publications

Microcontroller Control of Reactive Power Compensation for Growing Industrial Loads

Microcontroller Control of Reactive Power Compensation for Growing Industrial Loads

Mitigation of Reactive Power and Harmonics in a Case of Industrial Customer

Control Strategy of 1 kV Hybrid Active Power Filter for Mining Applications

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