Investigation of Power Quality in Health Care Facility

Hartungi, Rusdy; Jiang, Liben

doi:10.24084/repqj08.555

Cited by 17 publications

(10 citation statements)

References 5 publications

(7 reference statements)

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“…Figure 1 presents the curve of current variation in the neutral wire of the network for external lighting of the trading and entertainment center in the city of Krasnoyarsk [14]. The harmonics cause malfunction of circuit breakers because of a high value of the cross ratio, transformer overheating because of additional eddy current losses, capacitor damage because of high values of harmonic currents, increase losses in the asynchronous motors, create transient overvoltages in the cosine capacitors, lead to malfunction of protection and automation systems and many other adverse effects [15][16][17]. The costs induced by harmonics amount to 5.4 % of all the costs due to poor power quality [10].…”

Section: Examples Of the Adverse Impact Of Poor Quality Voltagementioning

confidence: 99%

On power quality and reliability of supply

Коверникова

Шамонов²

2017

E3S Web Conf.

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Abstract. Power quality determines reliability of electrical equipment operation, performance of the assigned functions by it, service life. In the last years problem of power quality attracted increased attention because of power quality degradation and a great number of consumer complaints. Many problems of power quality control, such as determination of liabilities and responsibility of power suppliers and consumers for its quality, call for solution. The paper presents the types of damages caused by harmonics and the results of an analysis of harmonic active power at the node connecting an aluminum smelter block to a supply network. The analysis is performed on the basis of measurements. Measured current and voltage were used to calculate harmonic active power. It was found out that the aluminum smelter block generates the harmonic active power to the supply network only during part of the measurement time. For the other part harmonic active power flows from the supply network to the aluminum smelter block. The paper presents the proposals on the use of harmonic active energy for determination of the power quality distortion source and its contribution.

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Section: Examples Of the Adverse Impact Of Poor Quality Voltagementioning

confidence: 99%

On power quality and reliability of supply

Коверникова

Шамонов²

2017

E3S Web Conf.

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“…HE performance of the matrix converter topology has been widely discussed and different approaches have been proposed to determine the proper control strategy [1][2][3], [10][11][12], [14]. The relatively small reactive component in the DC link is one of the significant advantages of the matrix converters.…”

Section: Introductionmentioning

confidence: 99%

“…Previous researches have shown the possibility to obtain balanced and sinusoidal output voltages even if the input voltages are unbalanced [4]- [7]. It has also been shown that the power disturbance of this kind will disturb the critical services such is in a healthcare facility and/or hospital [10][11]. By using proper modulation strategies, it is possible to reduce or to eliminate up to the significant level the input current harmonics under unbalanced supply voltages.…”

Section: Introductionmentioning

confidence: 99%

Investigation of The impact of Unbalanced and Non-sinusoidal Supply Voltages on Converters.

Hartungi¹

2019

ijsgset

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In this paper two input current modulation strategies for matrix converters are experimentally analyzed under two different supply conditions: sinusoidal unbalanced voltages and non-sinusoidal balanced voltages. Both strategies use the Space Vector Modulation (SVM) technique in order to control the matrix converter accordingly to the input and output constraints. Strategy A modulates the input currents keeping the corresponding space vector in phase with the input voltage vector. Strategy B operates in order to keep the input current vector in phase with the positive sequence fundamental component of the input voltage vector. A comparison between the two strategies is made in terms of the reduction of the input current disturbances due to the unbalanced and non sinusoidal voltage on the grid. It is found that a dynamic current modulation strategy, independent of the voltage disturbances such as Strategy B, is more effective for the reduction of the RMS value of input current disturbances. The validity of the theoretical investigation i.e. the effectiveness of the current modulation strategy conforms to experimental tests result carried out on a matrix converter prototype.

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“…The authors of [7] show the measurements of harmonics generated by energy saving lamps. The paper [8] presents the level of harmonics measured in the medical center and their negative impact on the operation of medical equipment. In [9] the authors show the results of large-scale measurements of power quality indices in the 110 kV networks of Siberia.…”

Section: Introductionmentioning

confidence: 99%

Results of the research into the harmonics of loads connected to the nodes of high voltage network

Коверникова¹

2014

REPQJ

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Abstract. The paper presents the results of the studies on measured parameters of harmonics for the complex loads connected to the nodes of the high voltage network. The measurements were made at four nodes of the 110-220 kV network. The complex loads include residential, commercial, industrial and tractional consumers. The considered nodes are the connection points of the railway substations to the feeding network. The paper demonstrates the specific features of the harmonic conditions.

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Investigation of Power Quality in Health Care Facility

Cited by 17 publications

References 5 publications

On power quality and reliability of supply

On power quality and reliability of supply

Investigation of The impact of Unbalanced and Non-sinusoidal Supply Voltages on Converters.

Results of the research into the harmonics of loads connected to the nodes of high voltage network

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