The Evolution for Voltage and Reactive Power Control in Smart Distribution Systems

2012 ◽  
Vol 13 (1) ◽  
Author(s):  
Hany E. Farag ◽  
Ehab F. El-Saadany ◽  
Ravi Seethapathy
Keyword(s):  
Smart Grid ◽  
Power Control ◽  
Distribution Systems ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Current Control ◽  
Multi Agent Systems ◽  
Reactive Power Control ◽  
Control Scheme ◽  
Control Schemes

This paper has been arisen to show the necessity of the evolution for voltage and reactive power control in distribution systems from conventional to active control techniques. The paper addresses the drawbacks and conflicts that the conventional voltage and reactive power control schemes will face in future distribution systems, especially with high penetration of Distributed Generation (DG). Some of these drawbacks have been verified by carrying out various simulation studies for different IEEE unbalanced radial distribution test systems. The results show that applying the conventional utility voltage regulation control practices in smart grid configuration is intolerable. Therefore, the issue of voltage and reactive power control in smart distribution systems is significant and an evolution of the current control schemes from passive to active is necessary. Using the smart grid technologies, a distributed single layer cooperative control scheme between substation regulators, line regulators and DG units has been proposed. The proposed cooperative scheme is based on the concept of multi-agent systems. Simulation results have been carried out to show the effectiveness of the proposed control scheme.

scholarly journals An Anti-Fluctuation Compensator Design and Its Control Strategy for Wind Farm System

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6413
Author(s):  
Feng-Chang Gu ◽  
Hung-Cheng Chen
Keyword(s):  
Power Control ◽  
Control Strategy ◽  
Large Scale ◽  
Wind Farm ◽  
Reactive Power ◽  
Wind Farms ◽  
Voltage Regulation ◽  
Current Control ◽  
Reactive Power Control ◽  
Control Scheme

Large-scale wind farms in commercial operations have demonstrated growing influence on the stability of an electricity network and the power quality thereof. Variations in the output power of large-scale wind farms cause voltage fluctuations in the corresponding electrical networks. To achieve low-voltage ride-through capability in a doubly fed induction generator (DFIG) during a fault event, this study proposes a real-time reactive power control strategy for effective DFIG application and a static synchronous compensator (STATCOM) for reactive power compensation. Mathematic models were developed for the DFIG and STATCOM, followed by the development of an indirect control scheme for the STATCOM based on decoupling dual-loop current control. Moreover, a real-world case study on a commercial wind farm comprising 23 DFIGs was conducted. The voltage regulation performance of the proposed reactive power control scheme against a fault event was also simulated. The simulation results revealed that enhanced fault ride-through capability and prompt recovery of the output voltage provided by a wind turbine generator could be achieved using the DFIG along with the STATCOM in the event of a three-phase short-circuit fault.

scholarly journals Distributed Reactive Power Control Scheme for the Voltage Regulation of Unbalanced LV Grids

2020 ◽  
pp. 1-1
Author(s):  
Georgios C. Kryonidis ◽  
Kyriaki-Nefeli D Malamaki ◽  
Spyros I. Gkavanoudis ◽  
Konstantinos Oureilidis ◽  
Eleftherios O Kontis ◽  
...  
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Reactive Power Control ◽  
Control Scheme

scholarly journals Study of Volt/VAr control applied to future electrical energy distribution systems

2019 ◽  
Author(s):  
Guilherme de Oliveira Custodio ◽  
Fernanda Caseño Trindade Arioli
Keyword(s):  
Energy Distribution ◽  
Power Control ◽  
Distribution Systems ◽  
Reactive Power ◽  
Electrical Energy ◽  
Photovoltaic Systems ◽  
Reactive Power Control ◽  
Control Functions ◽  
Distributed Generators ◽  
Control Scheme

Recently, several approaches have been proposed to mitigate the technical impacts caused by distributed generators in electrical energy distribution systems. Among these approaches one can detach the control scheme known as Volt/VAr, a centralized scheme that integrates voltage and reactive power control functions. In this context, this work aims to study the Volt/VAr control solved by an optimization tool, and focused on distribution systems with a high monitoring level and a massive integration of photovoltaic systems.

Prosumer-Driven Voltage Regulation via Coordinated Real and Reactive Power Control

2021 ◽  
pp. 1-1
Author(s):  
Jiakang Yang ◽  
Wayes Tushar ◽  
Tapan K. Saha ◽  
Mollah R. Alam ◽  
Yong Li
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Reactive Power Control

Reactive Power Control of Mega-Solar System for Voltage Regulation with Long Distribution Line

2017 ◽  
Vol 201 (1) ◽  
pp. 38-56 ◽  
Author(s):  
KOUICHIRO KOUNO ◽  
EIJI NAKANISHI ◽  
YOSHIAKI NAGANO ◽  
MASAHIDE HOJO
Keyword(s):  
Solar System ◽  
Power Control ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Reactive Power Control ◽  
Distribution Line

scholarly journals Heuristic Coordinated Voltage Control Schemes in Distribution Network with Distributed Generations

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2849
Author(s):  
Seok-Il Go ◽  
Sang-Yun Yun ◽  
Seon-Ju Ahn ◽  
Hyun-Woo Kim ◽  
Joon-Ho Choi
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Voltage Control ◽  
Distribution Networks ◽  
Control Voltage ◽  
Reactive Power Control ◽  
Distributed Generations ◽  
Control Scheme ◽  
Control Devices ◽  
Node Voltage

The voltage and reactive power control (Volt/VAR Control, VVC) in distribution networks has become a challenging issue with the increasing utilization of distributed generations (DGs). In this paper, a heuristic-based coordinated voltage control scheme that considers distribution voltage control devices, i.e., on-load tap changers (OLTC) and step voltage regulators (SVR), as well as reactive power control devices, i.e., DGs, are proposed. Conventional voltage control methods using non-linear node voltage equations require complex computation. In this paper, the formulation of simplified node voltage equations accounting for changes in tap position of distribution voltage control devices and reactive power changes of reactive power control devices are presented. A heuristic coordinated voltage control scheme using the proposed simplified node voltage equations is proposed. A coordinated voltage control scheme to achieve voltage control for nominal voltage and conservative voltage reduction (CVR) is presented. The results of the proposed schemes are compared with the results from the quadratic optimization method to confirm that the proposed schemes yields suitably similar results. Furthermore, a tap scheduling method is proposed to reduce the number of tap changes while controlling network voltage. The tap position is readjusted using a voltage control performance index (PI). Simulation results confirm that when using this method the number of tap changes is reduced. The proposed scheme not only produces reasonable performance in terms of control voltage of networks but also reduces the number of tap changes made by OLTC. The proposed control method is an alternative candidate for a system to be applied to practical distribution networks due to its simplified calculations and robust performance.

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