The global voltage regulation: a suggested measure for the supply quality in distribution networks

2001 ◽  
Vol 23 (6) ◽  
pp. 427-434 ◽  
Author(s):  
M.M Saied
Keyword(s):  
Distribution Networks ◽  
Voltage Regulation

scholarly journals Using Energy Storage Inverters of Prosumer Installations for Voltage Control in Low-Voltage Distribution Networks

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1121
Author(s):  
Rozmysław Mieński ◽  
Przemysław Urbanek ◽  
Irena Wasiak
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Reactive Power ◽  
Low Voltage ◽  
Storage System ◽  
Distribution Networks ◽  
Energy Storage System ◽  
Voltage Regulation ◽  
Active Power ◽  
Total Power

The paper includes the analysis of the operation of low-voltage prosumer installation consisting of receivers and electricity sources and equipped with a 3-phase energy storage system. The aim of the storage application is the management of active power within the installation to decrease the total power exchanged with the supplying network and thus reduce energy costs borne by the prosumer. A solution for the effective implementation of the storage system is presented. Apart from the active power management performed according to the prosumer’s needs, the storage inverter provides the ancillary service of voltage regulation in the network according to the requirements of the network operator. A control strategy involving algorithms for voltage regulation without prejudice to the prosumer’s interest is described in the paper. Reactive power is used first as a control signal and if the required voltage effect cannot be reached, then the active power in the controlled phase is additionally changed and the Energy Storage System (ESS) loading is redistributed in phases in such a way that the total active power set by the prosumer program remains unchanged. The efficiency of the control strategy was tested by means of a simulation model in the PSCAD/EMTDC program. The results of the simulations are presented.

scholarly journals Voltage regulation and power loss reduction by integration of SVC in distribution networks via PSSE

2020 ◽  
Vol 11 (3) ◽  
pp. 1579
Author(s):  
Ba-swaimi Saleh ◽  
Lee Jun Yin ◽  
Renuga Verayiah
Keyword(s):  
Power Flow ◽  
Voltage Stability ◽  
Flow Analysis ◽  
Distribution Networks ◽  
Voltage Regulation ◽  
Base Case ◽  
Facts Devices ◽  
Load Demand ◽  
Power Loss Reduction ◽  
The Stability

Voltage stability is necessary in order to maintain the health of the grid system. In recent years, the load demand is increasing from time-to-time which compromised the stability of the system. On that purpose, several methods on enhancing the voltage stability of the system was introduced such as the transformer tap and FACTS devices. In a general overview, this study is to propose a several power compensation techniques on the base case of an IEEE-33 bus whereby power flow analysis using Netwon- Raphson in PSS/E software is performed. Afterwards, distributed generation (DG) and Static VAR Compensator (SVC) will be implemented within the distribution network to compensate the voltage instability losses based on the weakest index from the bus system. From both the cases which is proposed earlier, a comparison study is conducted on the performance on both DG and SVC within the proposed network.

scholarly journals Design and Implementation of the Isolated Bidirectional DC-DC Converter

2021 ◽  
Vol 2125 (1) ◽  
pp. 012056
Author(s):  
Yiyang Yuan
Keyword(s):  
Power Flow ◽  
Distribution Networks ◽  
Voltage Regulation ◽  
Fault Isolation ◽  
Energy Access ◽  
Power Flow Control ◽  
Electrical Isolation ◽  
New Energy ◽  
Converter Topology ◽  
Increasing Demand

Abstract With the development of intelligent distribution networks and the increasing demand for new energy access, the isolated bidirectional dc-dc converter has become a key link in modern energy transformation systems. In order to realize the functions of electrical transformation and electrical isolation of dc voltage, this paper proposes a structure of isolated bidirectional dc-dc converter, and analyzes it in detail. The proposed isolated bidirectional dc-dc converter can not only realize voltage transformation, but also have voltage regulation and fault isolation functions. Finally, based on the MATLAB/Simulink simulation platform, the proposed isolated bidirectional dc-dc converter topology is built and verified by simulation. The structure of isolated bidirectional dc-dc converter not only has the functions of voltage transformation and electrical isolation, but also has fault isolation, power flow control and other functions.

scholarly journals Accurate Assessment of Decoupled OLTC Transformers to Optimize the Operation of Low-Voltage Networks

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2173
Author(s):  
Álvaro Rodríguez del Nozal ◽  
Esther Romero-Ramos ◽  
Ángel Luis Trigo-García
Keyword(s):  
Distributed Generation ◽  
Optimization Problem ◽  
Low Voltage ◽  
Optimal Solution ◽  
Distribution Networks ◽  
Voltage Regulation ◽  
Rigorous Approach ◽  
Tap Changer ◽  
Load Tap Changer ◽  
Active Distribution Networks

Voltage control in active distribution networks must adapt to the unbalanced nature of most of these systems, and this requirement becomes even more apparent at low voltage levels. The use of transformers with on-load tap changers is gaining popularity, and those that allow different tap positions for each of the three phases of the transformer are the most promising. This work tackles the exact approach to the voltage optimization problem of active low-voltage networks when transformers with on-load tap changers are available. A very rigorous approach to the electrical model of all the involved components is used, and common approaches proposed in the literature are avoided. The main aim of the paper is twofold: to demonstrate the importance of being very rigorous in the electrical modeling of all the components to operate in a secure and effective way and to show the greater effectiveness of the decoupled on-load tap changer over the usual on-load tap changer in the voltage regulation problem. A low-voltage benchmark network under different load and distributed generation scenarios is tested with the proposed exact optimal solution to demonstrate its feasibility.

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