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Keywords

LV distribution network, OLTC, capacitor banks, high penetration, voltage sensitivity, voltage control

Abstract

Onload tap changers(OLTC)and capacitor banks have been widely utilized to deal with the problem of voltage violation in lowvoltage(LV)distribution networks with highpenetration photovoltaic(PV). Different control strategies would directly affect the node voltage and operation number of OLTC tap and capacitor bank. In order to seek a suitable control strategy for handling the voltage violation problem in LV distribution network, a power controlbased(PCB)voltage control strategy is proposed on the basis of the analysis of the influence of OLTC reference voltage on the voltage control strategy and the voltage sensitivity matrix theory. In order to consider the influence of time sequence and randomness on PV output and load, probabilistic power flow based on sequential Monte Carlo simulation is utilized to calculate the probability values of network active power loss and node voltage violation probability. The proposed method is compared with the time controlbased(TCB)strategy in the test case. It is shown that the TCB based on the power control not only reduce the node voltage violation probability effectively, but also effectively reduce the action times of taps and capacitor banks, reduce the active power loss, and improve the ability of lowvoltage distribution network to absorb highpermeability household photovoltaic power generation.

DOI

10.19781/j.issn.16739140.2020.05.004

First Page

27

Last Page

35

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