scholarly journals From the Balancing Reactive Compensator to the Balancing Capacitive Compensator

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1979 ◽  
Author(s):  
Adrian Pană ◽  
Alexandru Băloi ◽  
Florin Molnar-Matei
Keyword(s):  
Mathematical Model ◽  
Distribution System ◽  
Reactive Power ◽  
Phase Distribution ◽  
Software Tool ◽  
Industrial Applications ◽  
Numerical Application ◽  
Three Phase ◽  
Specialized Equipment ◽  
The Mathematical Model

Nowadays, improving the power quality at the Point of Common Coupling (PCC) between the consumers’ installations and the distribution system operators’ installations depends more and more on the use of specialized equipment, able to intervene in the network to eliminate or diminish the disturbances. The reactive power compensators remain valid solutions for applications in consumer and electricity distribution, in those situations when the criterion regarding the costs of installing and operating the equipment is more important than the ones related to the reaction speed or the control accuracy. This is also the case of the equipment for power factor improvement and load balancing in a three-phase distribution network. The two functions can be achieved simultaneously by using an unbalanced static var compensator, known as an adaptive balancing compensator, achieved by adjusting the equivalent parameters of circuits containing single-phase coils and capacitor banks. The paper presents the mathematical model for the sizing and operation of a balancing reactive compensator for a three-phase four-wire network and then presents some resizing methods to convert it into a balancing capacitive compensator, having the same functions. The mathematical model is then validated by a numerical application, modelling with a specialized software tool, and by experimental laboratory determinations. The paper contains strong arguments to support the idea that a balancing capacitive compensator becomes a very advantageous solution in many industrial applications.

scholarly journals Iterative Method for Determining the Values of the Susceptances of a Balancing Capacitive Compensator

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2742
Author(s):  
Adrian Pană ◽  
Alexandru Băloi ◽  
Florin Molnar-Matei
Keyword(s):  
Load Balancing ◽  
Distribution System ◽  
High Performance ◽  
Reactive Power ◽  
Phase Distribution ◽  
Electrical Power ◽  
Power Converter ◽  
Problem Solution ◽  
Three Phase ◽  
Wide Range

To increase the electrical power quality, in the last decades, an intense development in the last decades of high-performance equipment built as advanced power electronics applications, such as the compensators from Switching Power Converter category, has taken place. For all that, Reactive Power Compensators (RPC) based on passive circuit elements, such as Static var Compensators (SVCs), still occupy a wide range of applications in customer and installations of the distribution system installations. The functions of power factor (PF) improvement and load balancing in a three-phase distribution network can be achieved with an unbalanced SVC, known as the Adaptive Balancing Reactive Compensator (ABRC). Presenting first the mathematical model of the initial sizing and the working mechanism of a Balancing Reactive Compensator (BRC) for a three-phase four-wire network, this article develops a compensator resizing algorithm through an iterative change of the initial sizing to transform the compensator into a Balancing Capacitive Compensator (BCC), which keeps the same functions. By using two computational and modeling software tools, a case study on the application of the method was carried out, demonstrating the availability of the sizing problem solution and validating the unbalanced capacitive compensation as an efficient way to PF improving and load balancing in a PCC (Point of Common Coupling).

Modeling and Simulation of Three Phase D-SVC for Load Compensation

2017 ◽  
Vol 8 (1) ◽  
pp. 262
Author(s):  
Ashwin Kumar Sahoo ◽  
Sarat Kumar Sahoo ◽  
Nalinikanta Mohanty
Keyword(s):  
Distribution System ◽  
Dynamic Capabilities ◽  
Reactive Power ◽  
Phase Distribution ◽  
Open Loop ◽  
Voltage Profile ◽  
Load Compensation ◽  
Three Phase ◽  
Shunt Capacitors ◽  
Shunt Compensation

The transmission of electric power has to take place in the most efficient way in addition to providing flexibility in the process. Flexible A.C. Transmission System (FACTS) promotes the use of static controllers to enhance the controllability and increase the power transfer capability. Providing reactive shunt compensation with shunt-connected capacitors and reactors is a well-established technique to get a better voltage profile in a power system. Shunt Capacitors are inexpensive but lack dynamic capabilities, thus some form of dynamically controlled reactive power compensation becomes essential.  In this paper, three phase Distribution Static Var Compensator (D-SVC) has been developed and studied under different conditions. Open loop mode and closed loop mode of operation of D-SVC is simulated and studied. The work presented here is very much useful for distribution system, for effective reactive power management and better Voltage control.

scholarly journals A Review of Different Configurations and Control Techniques for DSTATCOM in the Distribution system

2021 ◽  
Vol 309 ◽  
pp. 01119
Author(s):  
Khammampati R Sree Jyothi ◽  
P. Venkatesh Kumar ◽  
J. JayaKumar
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Reactive Power ◽  
Phase Distribution ◽  
Sliding Mode ◽  
Neutral Current ◽  
Harmonic Distortion ◽  
Control Techniques ◽  
Three Phase ◽  
And Control

This paper presents a review of DSTATCOM Topologies and power quality control Techniques. The used topologies are Three-phase Three-wire and Three-phase four-wire and control techniques are Instantaneous reactive power theory(IRP), Synchronous Reference Frame Theory(SRF), Model Predictive Control (MPC), Sliding mode control(SMC), Adaptive Neuro-fuzzy interface systems(ANFIS) and Artificial intelligence based controllers. These control techniques are used to mitigate the reactive power compensation, load balancing, Neutral current compensation, harmonics reduction and maintains the Total harmonic Distortion in IEEE519 standards. Performance investigated in Single-phase Distribution systems by connecting with STATCOM and without DSTATCOM in MATLAB/SIMULINK

scholarly journals A Nonlinearity-Retaining State Estimation for Three-Phase Distribution System

2012 ◽  
Vol 24 ◽  
pp. 233-239 ◽  
Author(s):  
Sun Guo-qiang ◽  
Wei Zhi-nong ◽  
Lu Zi-gang ◽  
Ye Fang
Keyword(s):  
State Estimation ◽  
Distribution System ◽  
Phase Distribution ◽  
Three Phase

A Novel Control Strategy for Three-Phase Four-Wire STATCOM

2012 ◽  
Vol 516-517 ◽  
pp. 1722-1727 ◽  
Author(s):  
Wei Jun Yun ◽  
Gang Yao ◽  
Li Dan Zhou ◽  
Chen Chen ◽  
Jun Min Pan
Keyword(s):  
Control Strategy ◽  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Control Method ◽  
Loop Control ◽  
Power Distribution System ◽  
Imbalance Problem ◽  
Three Phase ◽  
Close Loop Control

Nowadays Static Synchronous Compensator (STATCOM) has gradually become one of the representative techniques in the field of dynamic reactive power compensation in the power distribution system. This paper analyzed the topology and the voltage imbalance problem of the up and down capacitors on DC side of the three-phase four-wire STATCOM. In allusion to the imbalance problem of neutral point, a novel control strategy based on the control of zero-sequence current was proposed. By the triple close-loop control strategy, the STATCOM can achieve great control accuracy and dynamic performance. Simulation result proves that the proposed control method is effective.

Research on Identification Model of Stator Core Temperature Rise of a Generator

2014 ◽  
Vol 1070-1072 ◽  
pp. 1216-1221
Author(s):  
Dong Xiang ◽  
Hao Xiong ◽  
Ning Bo Liu ◽  
Qiang Wu ◽  
Guang Wei Meng
Keyword(s):  
Mathematical Model ◽  
Temperature Rise ◽  
Reactive Power ◽  
Ventilation System ◽  
Stator Winding ◽  
Phase Voltage ◽  
Stator Core ◽  
Voltage Phase ◽  
The Mathematical Model ◽  
Generator Stator

This paper takes the ship air-cooled AC generator with the radial ventilation system for example, establishes the mathematical model of a generator core and winding temperature by using an equivalent thermal circuit method and the temperature calculation method based on the operating parameters, analyzes the transfer function between the generator stator winding temperature rise and the phase voltage, phase current and reactive power, and finally verifies validity of the mathematical model by the experiment.

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