A Review on Basic Concepts and Important Standards of Power Quality in Power System

Ramachandran, Manohari; Mary, Anitha; Muthukumaran, M.; Ganesan, Jaya; Krishnaveni, A.; Selvaraj, D. Edison

doi:10.7753/ijsea0405.1013

Cited by 8 publications

(2 citation statements)

References 3 publications

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“…End users have increased their awareness of voltage quality and challenge network operators to obtain appropriate information and provide them with better power supply quality [3]. Nowadays, PQ has become a major aspect of the Power Distribution System (PDS), due to reasons such as the presence of sensitive and nonlinear loads in the distribution system [7,8]. The main problem is the quality of energy in terms of voltage constancy in the PDS.…”

Section: Introductionmentioning

confidence: 99%

Classification of Voltage Sag Propagation under Double Line to Ground Fault on a Low Voltage Distribution Power Network

Junejo

Koondhar

Memon

et al. 2021

Eng. Technol. Appl. Sci. Res.

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The key issue of the voltage-sag propagation on the different types of winding connections for the low voltage transformer in the distribution power network is considered in this study. The issues of voltage sag propagation depend upon the type of asymmetrical fault and the connection of the transformer windings. In this paper, the double line to ground fault is adopted for the voltage sag characterization. The depiction of the sage propagation is an outcome of the zero sequence components. Voltage sag propagation detection can be used to improve the power quality of the system. The obtained results reveal the characteristics of the voltage drop propagation from the primary to the secondary winding of the transformer throughout different connection. The implemented method will help analyze the Power Quality (PQ) problem in terms of voltage sag of the distributed transmission networks of the power system.

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Section: Introductionmentioning

confidence: 99%

Classification of Voltage Sag Propagation under Double Line to Ground Fault on a Low Voltage Distribution Power Network

Junejo

Koondhar

Memon

et al. 2021

Eng. Technol. Appl. Sci. Res.

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“…The most popular international organizations that responsible to develop the power quality standards are Institute of Electrical and Electronics Engineer (IEEE) and IEC. The example of the power quality standards developed by these two organizations are tabulated in Table 2.3 [117][118][119]. The utility companies conduct the power quality assessments by means of evaluating the power quality and reliability of the electrical power systems by using some indexes such as SAIFI, CAIDI and SAIDI [120].…”

mentioning

confidence: 99%

Control strategy of grid connected power converter based on virtual flux approach

Roslan¹

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Distributed Generation (DG) provides an alternative to the Centralized Generation (CG) by means of generating electricity near to the end user of power with the employment of small-scale technologies to produce electricity, mainly using Renewable Energy Sources (RES). The prospects of renewable energy integration during the next years are still very optimistic. This PhD dissertation is made to provide an alternative control framework for the grid connected power converter by adopting the virtual flux concept in the control layer. This dissertation can be divided into three main topics. The 1st topic presents the voltage sensorless control system for the grid-connected power converter. The control system presented is done without depending on AC-voltage measurement where the grid synchronization is based on the Virtual Flux (VF) estimation. In this regard, the Frequency Locked Loop (FLL) is used in conjunction with the estimation scheme to make the system fully adaptive to the frequency changes. This voltage sensorless application is useful for reducing cost and complexity of the control hardware. It is also can be utilized in case of limited reliability or availability of voltage measurements at the intended point of synchronization to the grid. Considering that most previous studies are based on the VF estimation for the case of power converter connected to the grid through the L-filter or LC-filter, this dissertation is focused on the power converter connected to the grid through the LCL filter. The Proportional Resonant (PR) current controller is adopted in the inner loop control of the power electronics-based converter to test the performance of such system. Another control method based on VF synchronization that permits to control the active and reactive power delivery in a remote point of the grid is also presented in this dissertation. This is due to the fact that the VF is implemented that the voltage in a remote point of the line can be estimated. As it will be shown in simulations and experiments, the proposed control scheme provides a good tracking and dynamic performance under step changes in the reference power. The fast synchronization and the smooth reference tracking achieved in transient conditions have demonstrated the effectiveness of the Dual Second Order Generalized Integrator controlled as Quadrature Signal Generator (DSOGI-QSG) and also the current controller used in the proposed system. In addition to the power control itself, this study could also benefit the frequency and the voltage regulation methods in distributed generation applications as for instance in microgrid. Considering the fact that the grid connected power converter can be controlled as a virtual synchronous generator where the flux is a variable to be used for controlling its operation, this dissertation also presents a Virtual Synchronous Flux Controller (VSFC) as a new control framework of the grid connected power converter. In this regard, a new control strategy in the inner loop control of the power converter will be proposed. The main components of the outer loop control of VSFC are based on the active and reactive power control. The results presented show that the VSFC works well to control the active and reactive power without considering any synchronization system. The inner loop control is able to work as it is required, and the measurement flux is able to track the reference flux without any significant delays. All the work presented in this dissertation are supported by mathematical and simulation analysis. In order to endorse the conclusions achieved, a complete experimental validations have been conducted before wrapping this dissertation with a conclusion and recommendation for future enhancement of the control strategies that have been presented.

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Operational Consumption Planning in a Hybrid LV Microgrid

El Hafiane,

El Magri,

Chakir

et al. 2024

Lecture Notes in Electrical Engineering

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A Review on Basic Concepts and Important Standards of Power Quality in Power System

Cited by 8 publications

References 3 publications

Classification of Voltage Sag Propagation under Double Line to Ground Fault on a Low Voltage Distribution Power Network

Classification of Voltage Sag Propagation under Double Line to Ground Fault on a Low Voltage Distribution Power Network

Control strategy of grid connected power converter based on virtual flux approach

Operational Consumption Planning in a Hybrid LV Microgrid

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