Power Quality Improvement Using Dynamic Voltage Restorer

Abas, Naeem; Dilshad, Saad; Khalid, Adnan; Saleem, Muhammad; Khan, Nasrullah

doi:10.1109/access.2020.3022477

Cited by 108 publications

(45 citation statements)

References 41 publications

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“…However, the constantly changing wind speed in the supply side causes irregular power supply problems for the surrounding grid system. Furthermore, wind power irregularity affects harmonic components, resulting in power quality deterioration and power equipment damages [1,2]. This problem can be solved by stabilizing the imbalance between power supply and power demand through curtailments, which forcibly limit the power generated by wind turbines.…”

Section: Introductionmentioning

confidence: 99%

Development of an Optimized Curtailment Scheme through Real-Time Simulation

et al. 2022

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When a lot of surplus power occurs in wind power system, an output limit is implemented to directly or indirectly curtail the output to maintain a balance between the supply and demand of the power system. The curtailment process of a large-scale wind farm causes loss of power and mechanical loads. Resultantly, imbalanced curtailments often occur, resulting in unilateral burdens for the owners of wind farms. Considering the curtailment issue, the study for minimizing system loss of power plants is required in terms of operational efficiency. This paper proposes an algorithm to achieve flexible control during the actual power curtailment process in a wind farm, considering the wake effect. Here, the Monte Carlo method was adopted to calculate the curtailment weight in wind farms by using power loss terms. In addition, an equivalent model of a real wind farm was implemented and simulated through real simulation computer-aided design (RSCAD) software. This paper verified the effectiveness of the proposed method by applying the curtailment communication signal to a real-time digital simulator (RTDS). The results showed a reduction in the computational loading of individual wind turbine curtailment values with the decline of the total effective power loss.

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Section: Introductionmentioning

confidence: 99%

Development of an Optimized Curtailment Scheme through Real-Time Simulation

et al. 2022

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“…The correction of this situation requires injecting the voltage of opposite polarity of the line that can obtain from the inverted output of the voltage controllers. These problems are very frequent and challenging in power distribution systems during fault conditions [5,6]. For example, once there is a line-to-ground fault, the faulty line faces voltage sag while other phases experience a voltage swell problem.…”

Section: Introductionmentioning

confidence: 99%

A New Dual Polarity Direct AC-AC Voltage Regulator Ensuring Voltage Step-Up and Step-Down Capabilities

et al. 2021

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The problem of voltage sag and swell is one of the major reasons for low-quality power in the distribution system. Normally, it results from the system’s faults, including line-to-ground and line-to-line, non-linear characteristics of loads and sources. Its effect is very serious for the critical loads as their performance is very sensitive to the variation in voltage. The stabilization of voltage is a mandatory requirement in such a situation. The correction of such problems requires the addition and subtraction of the voltage once the line voltage is decreased and increased. This behavior of the correcting voltage is ensured by the use of voltage controllers that can convert a constant input voltage into a non-inverted and inverted variable form. Their voltage gains depend on the depth level of the problem. The voltage buck and boost capabilities of the AC voltage stabilizers can tackle the problems having any depth level. The smartness of such a system depends on the number of electronic devices as they are the key elements in the power conversion system. Therefore, this research proposes a new AC voltage controller with fewer solid-state devices. Its overall impact is low volume and cost. The validation of the introduced approach is ensured with the help of simulation modeling and results gained from the practical setup.

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“…A wind power generating unit using ANN control used for a PMSG is proposed in [30]. Stability, Reactive power management, Reliability and Quality while integrating wind power systems to the Grid are discussed in [31][32][33][34][35]. Reference [36] defines and proposes measures to illustrate the variations of powers and power flows.…”

Section: Introductionmentioning

confidence: 99%

An ALO Optimized Adaline Based Controller for an Isolated Wind Power Harnessing Unit

Kodakkal

Rajagopal

Raju

et al. 2021

Designs

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A power generating system should be able to generate and feed quality power to the loads which are connected to it. This paper suggests a very efficient controlling technique, supported by an effective optimization method, for the control of voltage and frequency of the electrical output of an isolated wind power harnessing unit. The wind power unit is modelled using MATLAB/SIMULINK. The Leaky least mean square algorithm with a step size is used by the proposed controller. The Least Mean Square (LMS) algorithm is of adaptive type, which works on the online modification of the weights. LMS algorithm tunes the filter coefficients such that the mean square value of the error is the least. This avoids the use of a low pass filter to clean the voltage and current signals which makes the algorithm simpler. An adaptive algorithm which is generally used in signal processing is applied in power system applications and the process is further simplified by using optimization techniques. That makes the proposed method very unique. Normalized LMS algorithm suffers from drift problem. The Leaky factor is included to solve the drift in the parameters which is considered as a disadvantage in the normalized LMS algorithm. The selection of suitable values of leaky factor and the step size will help in improving the speed of convergence, reducing the steady-state error and improving the stability of the system. In this study, the leaky factor, step size and controller gains are optimized by using optimization techniques. The optimization has made the process of controller tuning very easy, which otherwise was carried out by the trial-and-error method. Different techniques were used for the optimization and on result comparison, the Antlion algorithm is found to be the most effective. The controller efficiency is tested for loads that are linear and nonlinear and for varying wind speeds. It is found that the controller is very efficient in maintaining the system parameters under normal and faulty conditions. The simulated results are validated experimentally by using dSpace 1104. The laboratory results further confirm the efficiency of the proposed controller.

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Power Quality Improvement Using Dynamic Voltage Restorer

Cited by 108 publications

References 41 publications

Development of an Optimized Curtailment Scheme through Real-Time Simulation

Development of an Optimized Curtailment Scheme through Real-Time Simulation

A New Dual Polarity Direct AC-AC Voltage Regulator Ensuring Voltage Step-Up and Step-Down Capabilities

An ALO Optimized Adaline Based Controller for an Isolated Wind Power Harnessing Unit

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