Augmented Sensitivity Estimation Based Voltage Control Strategy of Active Distribution Networks With PMU Measurement

Abstract

The application of synchronized phasor measurement technology at distribution networks provides new options for voltage-to-power sensitivity estimation and voltage regulation. An augmented sensitivity estimation-based voltage control strategy with a phasor measurement unit (PMU) measurement is proposed for active distribution networks (ADNs). The voltage control records are extracted from historical synchronized phasor measurements. The voltage-to-power sensitivities reflecting the relationship of voltage change and power fluctuation are estimated with the obtained voltage control records. In addition to the linear parameter, parameters to match the nonlinearity between voltage and power variation and to track the operation conditions are introduced in the fitting model to improve the accuracy of the voltage control strategy. Rule-based and sensitivity-based optimization voltage control methods are proposed using the sensitivities estimated in which the measurements of partial nodes at the distribution network are the only needed data. The voltage control is also realized with faster computation speed. Case studies and analysis on the IEEE 33-node test feeder verify the correctness and effectiveness of the proposed method. INDEX TERMS Active distribution network (ADN), voltage control, phasor measurement unit (PMU), sensitivity estimation. NOMENCLATURE A. ABBREVIATIONS

Complex affine arithmetic based uncertain sensitivity analysis of voltage fluctuations in active distribution networks

“…In (Li et al, 2018), a fast sensitivity based preventive control selection method was proposed for online voltage stability assessment. Reference (Su et al, 2019) proposed a measurement based voltage control method for distribution networks combined with the sensitivity estimation. In (Gupta and Kumar, 2022), the optimal location and sizing of each DG were obtained by sensitivity based techniques.…”

Model-less Robust Voltage Control in Active Distribution Networks using Sensitivity Coefficients Estimated from Measurements

“…Thanks to the increasing adoption of monitoring systems such as smart meters in present distribution networks, measurement-based/data-driven/model-less control schemes can be an alternative. This leads to the second kind of voltage control scheme often referred to as measurementbased schemes [7], [10], [11], [12], [13]. These schemes are used for real-time voltage control where the network model is inferred from the measurements.…”

Decentralized Voltage Control Strategy of Soft Open Points in Active Distribution Networks Based on Sensitivity Analysis

“…By introducing the concept of voltage-to-power sensitivity, conducting a numerical linearization around the operating point, a linear relationship between node power injection and voltage is established to improve the calculation efficiency. Voltage-to-power sensitivity has a clear physical concept that shows the relation of active or reactive power fluctuation in voltage amplitude, which currently has been widely applied in stability analysis [16,17], voltage regulation [18,19], DG hosting capacity [20], optimal allocation [21], and so on. Furthermore, with the development of advanced measurement equipment in distribution networks, such as the micro phasor measurement unit (µPMU), sensitivities can be obtained based on limited measurements [17,22].…”