Active and reactive power based feedback linearization control technique for grid-connected voltage source converter

2015 ◽  
Author(s):  
R. K. Patnaik ◽  
S. P. Mishra ◽  
J. P. Patra
Keyword(s):  
Feedback Linearization ◽  
Reactive Power ◽  
Control Technique ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Active And Reactive Power ◽  
Feedback Linearization Control

scholarly journals Vector Control of VSC HVDC System under Single Line to Ground Fault Condition

2018 ◽  
Vol 7 (1) ◽  
pp. 59
Author(s):  
Prabodha Kumar Rath ◽  
Kanhu Charan Bhuyan
Keyword(s):  
Vector Control ◽  
Reactive Power ◽  
Control Method ◽  
System Stability ◽  
Control Technique ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Control Loop ◽  
Hvdc System ◽  
Ground Fault

<span lang="EN-US">This paper proposes a model of a VSC (voltage source converter) based Back to Back HVDC system and its control technique under fault condition. From the mathematical model of the system relationship between the controlling and the controlled variables is determined to control the system parameters. An appropriate vector control technique is used to control active and reactive power and to maintain DC link voltage. The proposed controlling unit consists of outer control loop and inner control loop which effectively damped out the system oscillation and maintains the system stability. The validity of the model and the feasibility of the control method have been proved by the simulation results. In this paper the system performance is studied under fault condition is studied.</span>

scholarly journals Active and reactive power management of grid connected photovoltaic system

2019 ◽  
Vol 13 (3) ◽  
pp. 1324
Author(s):  
Ameerul A. J. Jeman ◽  
Naeem M. S. Hannoon ◽  
Nabil Hidayat ◽  
Mohamed.M.H. Adam ◽  
Ismail Musirin ◽  
...  
Keyword(s):  
Reactive Power ◽  
Photovoltaic System ◽  
Linear Control ◽  
Convergence Time ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Pv System ◽  
Control Approach ◽  
Active And Reactive Power ◽  
Non Linear

<span>Voltage-source converter (VSC) topology is widely used for grid interfacing of distributed generation (DG) systems such as the photovoltaic system (PV). Since the operation of the VSC is essential to ensure quality of active and reactive power injected to the grid, a control approach is needed to deal with the uncertainties in the grid such as faults. This paper presents a non-linear controller design for a three-phase voltage source converter (VSC). The dynamic variables adopted for the VSC are the instantaneous real and reactive power components. The control approach that interface the VSC between the PV system and the grid are subjected to the current-voltage based. PV system injects active power to the grid and local load while utility grid monitors the power compensation of load reactive power. The proposed non-linear control strategy is implemented for the VSC to ensure fast error tracking and finite convergence time. The adaptive nature of the proposed non-linear control provides more robustness, less sluggish fault recovery compared to conventional PI control. The comprehensive numerical model is demonstrated in MATLAB script environment with power system disturbances such as faults in the grid. The simulation of proposed system is being carried out in MATLAB/SIMULINK environment to validate the control scheme. The proposed control system regulates the VSC ac side real and reactive power component and the dc side voltage.</span>

scholarly journals Leaky-momentum control algorithm for voltage and frequency control of three-phase SEIG feeding isolated load

2021 ◽  
Author(s):  
Duli Chand Meena ◽  
◽  
Madhusudan Singh ◽  
Ashutosh K. Giri ◽  
◽  
...  
Keyword(s):  
Control Algorithm ◽  
Reactive Power ◽  
Frequency Control ◽  
Storage System ◽  
Operating Conditions ◽  
Control Technique ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Nonlinear Load ◽  
Three Phase

This paper dealt the implementation of a Leaky-Momentum Control Algorithm (LMA) for controlling a voltage source converter (VSC) to enhance the power quality of a three-phase self-excited induction generator (SEIG) used in a distributed generating system. This LMA technique operates the VSC to regulate voltage and frequency of SEIG within a permissible limit. The LMA control is implemented to reduce the higher demand of reactive power, harmonics distortions and balancing of loads under different operating conditions. During the electrical and mechanical dynamical conditions, the LMA technique is maintaining a constant voltage and frequency at point of common coupling (PCC). The proposed technique is a modified control technique of basic Leaky and Momentum Algorithms. This control has removed the drawbacks of Leaky and momentum algorithms. Moreover, it is observed that LMA performs better when there are uncertainties in input conditions. The whole system comprising SEIG, nonlinear load, voltage source converter and battery storage system is made in MATLAB /SIMULINK. It has shown promising performance under both dynamical state and steady state of the system.

scholarly journals Virtual Flux Predictive Direct Power Control of Five-level T-type Multi-terminal VSC-HVDC System

2020 ◽  
Vol 64 (2) ◽  
pp. 133-143
Author(s):  
Ahmed Reguig Berra ◽  
Said Barkat ◽  
Mansour Bouzidi
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Operating Conditions ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Switching Frequency ◽  
Direct Power ◽  
Direct Power Control ◽  
Active And Reactive Power ◽  
Virtual Flux

This paper proposes a Virtual Flux Predictive Direct Power Control (PDPC) for a five-level T-type multi-terminal Voltage Source Converter High Voltage Direct Current (VSC-HVDC) transmission system. The proposed PDPC scheme is based on the computation of the average voltage vector using a virtual flux predictive control algorithm, which allows the cancellation of active and reactive power tracking errors at each sampling period. The active and reactive power can be estimated based on the virtual flux vector that makes AC line voltage sensors not necessary. A constant converter switching frequency is achieved by employing a multilevel space vector modulation, which ensures the balance of the DC capacitor voltages of the five-level t-type converters as well. Simulation results validate the efficiency of the proposed control law, and they are compared with those given by a traditional direct power control. These results exhibit excellent transient responses during range of operating conditions.

Square of Voltage Out-Loop Based Feedback Linearization Control of Voltage Source Converter (VSC) in SMES

2013 ◽  
Vol 732-733 ◽  
pp. 1216-1221 ◽  
Author(s):  
Xiao Kang Dai ◽  
Bu Han Zhang ◽  
Yi Chen
Keyword(s):  
Feedback Linearization ◽  
Magnetic Energy ◽  
Control Variable ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Loop Control ◽  
Variable Expression ◽  
Feedback Linearization Control ◽  
Dc Bus ◽  
Bus Voltage

To improve the response characteristic of the VSC in SMES (Superconducting Magnetic Energy Storage) with wide load disturbance, a new square of voltage out-loop based feedback linearization control strategy is proposed for the control of VSC. The input variable was controlled by a combining of square of voltage out-loop based direct voltage control and current inner-loop control to achieve fast stabilization of DC bus voltage and accurate tracking of power of PCC. Stability and dynamic response characteristics of the system were verified by simulation results. It is shown that the proposed strategy can improve the DC bus voltage transient response with load step change, with simplified control variable expression and reduced calculating burden.

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