The Experts below are selected from a list of 214755 Experts worldwide ranked by ideXlab platform
Marco Liserre - One of the best experts on this subject based on the ideXlab platform.
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Analysis of Voltage Control Strategies for Wind Farms
IEEE Transactions on Sustainable Energy, 2020Co-Authors: Shahab Asadollah, Marco LiserreAbstract:PCC Voltage Control is an important key to deal with upcoming challenges of large-scale wind power integration into electric grid. In this paper, based on the derived transfer functions of the plant and Controllers, the dynamic performance of three Voltage Control strategies (centralized, decentralized, and distributed Control) is evaluated in terms of robustness to variation of short-circuit ratio (SCR), disturbance rejection (DR), and impact of communication delay. After showing shortcomings of each strategy, an improved Voltage Control strategy with lower sensitivity to SCR variation and higher capability on grid Voltage DR as well as on reactive current dispatch is proposed. The theoretical analysis is validated by simulation results in MATLAB. Finally, a small wind farm is modeled and simulated in RTDS to demonstrate the possible Control interaction and reactive current sharing performance of the studied Control schemes.
Geert Deconinck - One of the best experts on this subject based on the ideXlab platform.
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Experimental Validation of Peer-to-Peer Distributed Voltage Control System
Energies, 2018Co-Authors: Hamada Almasalma, Sander Claeys, Konstantin Mikhaylov, Jussi Haapola, Ari Pouttu, Geert DeconinckAbstract:This paper presents experimental validation of a distributed optimization-based Voltage Control system. The dual-decomposition method is used in this paper to solve the Voltage optimization problem in a fully distributed way. Device-to-device communication is implemented to enable peer-to-peer data exchange between agents of the proposed Voltage Control system. The paper presents the design, development and hardware setup of a laboratory-based testbed used to validate the performance of the proposed dual-decomposition-based peer-to-peer Voltage Control. The architecture of the setup consists of four layers: microgrid, Control, communication, and monitoring. The key question motivating this research was whether distributed Voltage Control systems are a technically effective alternative to centralized ones. The results discussed in this paper show that distributed Voltage Control systems can indeed provide satisfactory regulation of the Voltage profiles.
Vladimir C. Strezoski - One of the best experts on this subject based on the ideXlab platform.
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Advanced Voltage Control integrated in DMS
International Journal of Electrical Power & Energy Systems, 2012Co-Authors: G. Švenda, Z. Simendić, Vladimir C. StrezoskiAbstract:Abstract The paper deals with distribution network (DN) Voltage Control from the network operation point of view. The basic Voltage Control devices, under load and no load tap-changing transformers, are specially stressed. Distributed generators (DGs) and capacitor banks are also discussed. The classical principle of single line Voltage drop compensation (LDC) is treated as the base Voltage Control. The optimal Voltage Control (OVC), which appeared 15 years ago, was developed to overcome some of LDC shortcomings. After the appearance of OVC, distribution management systems (DMSs) developed intensively and were applied immensely in distribution practice. This opportunity has been taken to integrate the distribution Voltage Control into DMS. The integration of the Voltage Control with Power flow, State estimation, Medium- and Short-term load forecast is of special interest for the paper. The high quality integration is provided by application of the same DN Data base and Mathematical model. In this way, the advanced Voltage Control has been developed. It ultimately overcomes all shortcomings of OVC (and LDC as well). This Control is the subject of the paper and its properties are compared with LDC and OVC.
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Real-time Voltage Control integrated in DMS
IET Conference Publications, 2009Co-Authors: G. Švenda, Vladimir C. Strezoski, Zoran J. Simendic, Vidoje MijatovicAbstract:The paper deals with the real time optimal Voltage Control integrated into contemporary Distribution Management Systems. The Voltage profile of the entire distribution network is the optimization objective. Tap changer positions of all remotely Controlled under load tap changing transformers are Control variables. The optimization procedure is based on the results of the real time distribution state estimation running. The quality of the developed Voltage Control is quantified with the sum of squares of the deviations of Voltages on low Voltage busbars of the network distribution transformers. The presented results prove that this quality is significantly better than the quality of the network Voltage profiles achieved by the application of the classic Voltage Control. The results are verified in several real-life distribution networks. The paper offers the results of the Voltage Control verification in the distribution network of the city of Sombor, the branch of the Electric Power Distribution Utility Elektrovojvodina, Novi Sad, Serbia.
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Voltage Control integrated in distribution management system
Electric Power Systems Research, 2001Co-Authors: Vladimir C. Strezoski, Nenad Katić, Dusan S. JanjicAbstract:Abstract The Voltage Control in distribution networks is established as a centralized analytical function in this paper. It is integrated in the Distribution Management System. Control devices consist of under-load and off-Voltage tap changing transformers, feeder Voltage regulators and buck/boost transformers. On the basis of areas whose Voltages are influenced by these Control devices and their action speeds, the Voltage Control problem is decomposed in space and time. The space decomposition enables a solution of the distribution Voltage Control problem for the medium Voltage (MV) network of each supply transformer (substation) separately. As well, the time decomposition enables a solution in the operation planning mode and the real time mode separately. The Voltage Control is each time stated as a constrained optimization problem. The network Voltage profile quality is quantified by the damage (inconvenience) that electric consumers sustain due to steady state Voltage deviations. Therefore, this damage is used as the optimization objective. The effectiveness of the Voltage Control is demonstrated on a real-life DN.
Lu Qiang - One of the best experts on this subject based on the ideXlab platform.
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Static hybrid automatic Voltage Control systems
Control theory & applications, 2007Co-Authors: Lu QiangAbstract:The concept of Hybrid Power Control System is introduced to the power systems' Voltage Control, and the static hybrid automatic Voltage Control(HAVC) system is established in the paper. Firstly, a new hybrid hierarchical Voltage Control system model based on the hybrid theory is proposed, and the operating process is designed. Secondly, the stability event and the economic event are defined to drive the system, through which one can achieve the synthetic objects of safety, stability and economy. Moreover, the system provides a much easier access to achieve optimal automatic Voltage Control, which is highly feasible in practice. The system's Controlled targets, which are driven and decoupled by discrete events, are dispatched to different modules of sub-layer, so that the calculations become more efficient with higher realizability. Finally, computer simulation results are given to show the validity of the system and the designed approaches.
P Pruvot - One of the best experts on this subject based on the ideXlab platform.
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improved secondary and new tertiary Voltage Control
IEEE Transactions on Power Systems, 1995Co-Authors: Marija Ilic, Gilbert Leung, M Athans, C Vialas, P PruvotAbstract:In this paper the basic role of a secondary (regional level) Voltage Control in a multi-regional electric power system is reviewed. Specifically, certain limitations of presently implemented Control schemes are described. Next an improved secondary Voltage Control (ISVC) scheme is proposed. In the second part of the paper, possible enhancements of a multi-regional power system operation by means of scheduled, tertiary Voltage Control (TVC) interactions are proposed. It is shown that the prime role of a TVC is in managing limits on Voltage Control devices, such as generators. The theoretical developments are illustrated on two regions of the French electric power network.
