Reactive power optimization compensation research of medium and lower voltage distribution network in modernization function district

Mao, Y.; Liang, Shiwen; Liu, X; Fan, Xiao Ping

doi:10.1201/b16698-72

Cited by 1 publication

(1 citation statement)

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“…Both industrial and commercial specialized transformer areas and ordinary house-hold oriented public transformer areas contain large amount of inductive load, and consume high reactive power. The flow of reactive power in transmission and distribution lines can lead to increase in current, and decrease in voltage quality, which will have adverse effects on electrical equipment [1]. At present, low-voltage reactive power compensation devices have been basically installed on the low-voltage side of the distribution transformer, which has significant role in improving voltage quality, reducing network losses [2].…”

Section: Introductionmentioning

confidence: 99%

Development of low-voltage intelligent compensation device with high accuracy used in distribution substation

Yan,

Zhang,

Hao

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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In response to the problems of the three-phase unbalance and the large grouping capacity of low-voltage reactive power compensation devices in the low-voltage distribution stations, as well as the inaccurate coordination between capacitor switching and zero-crossing point, the precise zero-crossing switching control method considering grid frequency and magnetic holding relay action time is proposed in the paper. The precise compensation capacity of capacitors is designed, and the low-voltage intelligent compensation device with high accuracy is developed. After testing, within the frequency range of 45-55Hz in the power grid, the time error between the input and output of the magnetic holding relay is within 100us, and accuracy of reactive power compensation can reach 1kvar. The low-voltage intelligent precise compensation device is fast and reliable in the distribution network. With the flexible configuration number, the device can accurately achieve the voltage zero-crossing capacitor input and the capacitor current zero-crossing cutoff. This device has small impact on the power grid, safe and reliable operation effect, and expands the application range.

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Section: Introductionmentioning

confidence: 99%