Control voltage 2019
Mayank Baranwal, Srinivasa Salapaka. In this paper, the problem of decomposing a large interconnected power network into smaller loosely-coupled zones in order to facilitate easy and flexible management of power transmission systems is addressed. This decomposition enables secondary level voltage control at regional levels and controlled islanding, which can be used to prevent the spreading of large-area blackouts. An electrical power transmission system is viewed as a fully-connected, weighted directed graph, where nodes and edge-weights of the graph represent buses and quantifications of electrical similarity between any two buses, respectively.
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Control voltage 2019
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- Molecular streaming and its voltage control in ångström-scale channels
- NAMM 2019: Verbos Electronics debut Mini Horse and Control Voltage Processor
- Voltage support
- Towards modular composition of agent-based voltage control concepts
- Adaptive droop control for high-performance operation in low-voltage DC microgrids
- Voltage Control Methods in the MV Grid with a Large Share of PV
Molecular streaming and its voltage control in ångström-scale channels
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Different control algorithms have been proposed to regulate the current and voltage of parallel energy sources. Droop control, a method for controlling DC microgrids, does not require a communication link. However, droop control has some constraints, such as not properly sharing the load among parallel converters and deteriorating voltage regulation. This paper proposes an adaptive droop controller to mitigate the problems of conventional droop control. The droop parameters are evaluated online and are adapted utilizing the primary current sharing loops to decrease the deviation in the load current sharing.
In addition, the droop lines are shifted by the second loop to eliminate the bus voltage deviation of DCMGs. The proposed algorithm is assessed under various input voltages and load resistances.
The simulation and experimental results illustrate the good performance of the introduced technique compared to classic control. Please log in to get access to this content Log in Register for free. To get access to this content you need the following product:. Springer Professional "Technik" Online-Abonnement. Springer Professional "Wirtschaft" Online-Abonnement. Smart grid handbook. Wiley, Hoboken. J Electr Comput Eng — In: International conference on electrical and electronics.
Title Adaptive droop control for high-performance operation in low-voltage DC microgrids. Authors: Mohamed A. Ghalib E. Shehat Jean Thomas R. Publication date Publisher Springer Berlin Heidelberg. Original Paper Design of an optimized fractional high-order differential feedback controller for an AVR system.
Original Paper Functioning ability of multilevel Vienna converter as new parallel active filtering configuration: simulation and experimental evaluation. Original Paper New approach in partial discharge diagnosis and maintenance of Original Paper Implementation of capital deferral algorithm in real distribution systems considering reliability by managing major faults.
Original Paper A novel intervals-based algorithm for the distribution short-circuit calculation. Original Paper An efficient hybrid structure to solve economic-environmental energy scheduling integrated with demand side management programs.
NAMM 2019: Verbos Electronics debut Mini Horse and Control Voltage Processor
This paper proposes a novel secondary control strategy for the power-electronic-based ac microgrid. This approach restores the voltage and frequency deviations by utilizing only local variables with very high bandwidth. This is realized with a finite control set model predictive control technique that is adopted in the inner level of the primary control of voltage source converters. In the outer level of the primary control, droop control and virtual impedance loops are exploited to adjust the power sharing among different distributed generation DGs. As inner control level operates with a very high bandwidth, need for filtering of the calculated active and reactive powers in the outer level of the primary control is insignificant. Therefore, the secondary control can be operated with a far superior bandwidth compared to the case when the conventional cascaded linear control is used. Merits of the proposed approach are investigated analytically with the help of the describing function methodology that allows the quasi-linear approximation of the inner control level.
Voltage support
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Towards modular composition of agent-based voltage control concepts
Muhammad Kashif, M. Hossain , Vivek Sharma, S. Nawazish Ali , Asif Khan. Active Power Filters APF have already adopted the three-level inverter topology in medium-voltage and high-power applications for solving power-quality problems.
Adaptive droop control for high-performance operation in low-voltage DC microgrids
Analysis of Russian national regulation and technical standards requirements for generating equipment participation in voltage and reactive power control in the power system carried out. Advantages of voltage and reactive power control automation over decentralized and poorly coordinated control are substantiated. Problematic aspects of distributed generation units including RES integration, as well as ENTSO-E approaches to voltage and reactive power control in the synchronous zone of continental Europe are considered. Technical requirements of Deutsch and Danish regulations, regarding participation of distributed generation facilities in voltage control are given. Data correspond to usage on the plateform after
Voltage Control Methods in the MV Grid with a Large Share of PV
A robust control scheme with low-voltage ride-through ability is presented for grid-connected photovoltaic converters that operate under harsh conditions such as voltage sags and unknown disturbances and parameters. The proposed strategy allows for flexible active and reactive power injection into the grid during asymmetrical voltage sags without using a phase-locked loop or positive and negative sequence components. In addition, the same controllers are used under both normal operation and voltage sags, thus, lowering the control system's complexity. The scheme is conceived by combining uncertainty-and-disturbance-estimation compensation and repetitive control for the dc voltage and phase currents, respectively. Controller design is carried out systematically and closed-loop stability is proven through Lyapunov's analysis.
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We simulate the current-voltage relation of short layered superconductors, which we model as stacks of capacitively coupled Josephson junctions. The system is driven by external laser fields, in order to optically control the voltage drop across the junction. We identify parameter regimes in which supercurrents can be stabilized against thermally induced phase slips, thus reducing the effective voltage across the superconductor. Furthermore, single driven Josephson junctions are known to exhibit phase-locked states, where the superconducting phase is locked to the driving field. We numerically observe their persistence in the presence of thermal fluctuations and capacitive coupling between adjacent Josephson junctions. Our results indicate how macroscopic material properties can be manipulated by exploiting the large optical nonlinearities of Josephson plasmons.
Energy Informatics volume 2 , Article number: 26 Cite this article. Metrics details. In the last years, diverse agent-based concepts for voltage control in distribution grids were presented in literature. All these approaches are developed manually. Up to now, no tailoring approach has been presented to adapt these concepts to different — likewise specific — grid situations. As the effectiveness of voltage control schemes is highly dependent on the specific grid situation, this can result in multiple problems with regard to performance, applicability and expandability of the proposed agent-based control.
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