Online voltage estimation and control for smart distribution networks

Raghavendra, Prakash S.; Gaonkar, D. N.

doi:10.1007/s40565-016-0187-6

Cited by 21 publications

(7 citation statements)

References 21 publications

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“…i Set of node i and its adjacent nodes DG , SVC , CB , OLTC , SVR Set of DG/SVC/CB/OLTC/SVR The increasing penetration of distributed generators (DGs) and flexible loads poses new challenges to the operation control and energy management of distribution networks [1], [2]. The intermittency and volatility of DGs and electric vehicles (EVs) make the voltage fluctuation of the distribution network more frequent to violate the limits [3], [4]. Voltage violation is a vital issue to limit DG penetration and challenges the operation of active distribution network (ADN) [5]- [7].…”

Section: Set Of All Nodesmentioning

confidence: 99%

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

et al. 2019

IEEE Access

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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

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Section: Set Of All Nodesmentioning

confidence: 99%

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

et al. 2019

IEEE Access

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“…It is important to obtain system parameters, such as voltage magnitudes and power flows, for the operation and control of distribution system regulating devices. Many methods have been proposed in the literature to estimate voltage profile of a radial distribution system [7][8][9][10][11][12]. e methods presented in [7,8] estimate the voltages without considering any generators in the distribution system.…”

Section: Introductionmentioning

confidence: 99%

Voltage Profile Analysis in Smart Grids Using Online Estimation Algorithm

Raghavendra¹,

Nuvvula²,

Kumar³

et al. 2022

Journal of Electrical and Computer Engineering

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Voltage rise is the main obstacle to prevent the increase of distributed generators (DGs) in low-voltage (LV) distribution grids. In order to maintain the power quality and voltage levels within the tolerance limit, new measurement techniques and intelligent devices along with digital communications should be used for better utilization of the distribution grid. This paper presents a real-time sensor-based online voltage profile estimation technique and coordinated Volt/VAR control in smart grids with distributed generator interconnection. An algorithm is developed for voltage profile estimation using real-time sensor remote terminal unit (RTU) which takes into account topological characteristics, such as radial structure and high R/X ratio, of the smart distribution grid with DG systems. A coordinated operation of multiple generators with on-load tap changing (OLTC) transformer for Volt/VAR control in smart grids has been presented. Direct voltage sensitivity analysis is used to select a single DG system for reactive power support in multi-DG environment. The on-load tap changing transformer is employed for voltage regulation when generators’ reactive power contributions are not enough to regulate the voltages. Simulation results show that the reported method is capable of maintaining voltage levels within the tolerance limit by coordinated operation of DG systems and on-load tap changing transformer.

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“…Literature [8] adopts the subjective and objective weighting method to conduct a comprehensive assessment of power quality, but it is only applied to the comprehensive assessment of power quality and cannot withdraw the security of distribution network. Literature [9] puts forward the comprehensive evaluation of power quality only. Security is reflected in the power supply capacity and power supply quality of the power system, which must be considered in the actual operation of the power system.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive evaluation method for the security situation of distributed power supply in distribution network

2021

E3S Web Conf.

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In order to study the influence of distributed power access on the security state of distribution network, a comprehensive evaluation method for the security state of distribution network including distributed power access was proposed.Based on the output model and load model of photovoltaic power supply, the security situation assessment index system of distributed power supply access distribution network is established. Then combined with fuzzy analytic hierarchy process and entropy weight method, the composite weight of each index is obtained, and the combined weight is optimized based on chi-square distance. Finally, the evaluation method based on ER algorithm (Evidential Reasoning) is proposed. Simulation results verify the effectiveness and accuracy of the proposed method.

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Online voltage estimation and control for smart distribution networks

Cited by 21 publications

References 21 publications

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

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

Voltage Profile Analysis in Smart Grids Using Online Estimation Algorithm

A comprehensive evaluation method for the security situation of distributed power supply in distribution network

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