Pegah Shafaghi; Mehdi Mahdavian
Abstract
Power electronic converters such as dynamic voltage restorer (DVR), distribution static compensator (DSTATCOM), and unified power quality conditioner (UPQC) can zero voltage regulation, eliminate harmonics, reactive power compensation and unbalancing on both the source and load side of the system. The ...
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Power electronic converters such as dynamic voltage restorer (DVR), distribution static compensator (DSTATCOM), and unified power quality conditioner (UPQC) can zero voltage regulation, eliminate harmonics, reactive power compensation and unbalancing on both the source and load side of the system. The distribution static compensator is the distribution flexible ac transmission system (FACTS) device. It is an important device in a distribution network that used for maintaining constant distribution voltage, correcting power factor, and mitigating harmonics. This paper describes the application of a distribution static compensator for reactive compensation in electric distribution networks, to regulation voltage. Simulated performance of distribution static compensator is presented at varying conditions. The performance of the system has been considered for two cases: change in the source voltage (variable load is constant) and change in the load (voltage source is constant). At the end, the result of simulation with Matlab Simulink software has been presented. .
Mohammad Hossein Kafi; Mehdi Mahdavian; Ali Asghar Amini; Ghazanfar Shahgholian; Majid Dehghani
Volume 11, Issue 03 , September 2022, , Pages 111-117
Abstract
The purpose using capacitors in distribution networks is to reduce the total losses of the network. Capacitors help regulate the power factor and voltage in the electrical distribution system, and can be controlled remotely, in and out of the system. Capacitor placement depends on the objective function, ...
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The purpose using capacitors in distribution networks is to reduce the total losses of the network. Capacitors help regulate the power factor and voltage in the electrical distribution system, and can be controlled remotely, in and out of the system. Capacitor placement depends on the objective function, which is usually single objective or multi objective. In this paper, the amount of capacitor at minimum load is determined using a genetic algorithm. The calculation is done at peak load to determine the sensitivity of power losses. By using this method, the increase of the voltage caused by the lead phase of the system is prevented in the minimum load. A multi-purpose objective function to simultaneously reduce losses and improve the voltage profile of the optimal capacitor size in each section is detected by a genetic algorithm. To show the efficiency of the method, the capacitor placement results are compared using DIGSIENT software.
Majid Dehghani; Mehdi Mahdavian; Ali Asghar Amini
Abstract
From a steady state point of view, FACTS devices operate by increasing or decreasing voltage, supplying or absorbing reactive power, and controlling the impedance of a series of transmission lines or phase angles. There are two types of power fluctuation damping controllers in power systems: power system ...
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From a steady state point of view, FACTS devices operate by increasing or decreasing voltage, supplying or absorbing reactive power, and controlling the impedance of a series of transmission lines or phase angles. There are two types of power fluctuation damping controllers in power systems: power system stabilization (PSS) and FACTS POD controllers. The planning and operation condition of electrical power systems are changing due to a variety of causes. Flexible ac transmission system (FACTS) controller helps in raising dynamic stability limit and provide better power flow control. Static synchronous series compensator (SSSC) is one of the important members of series FACTS controller, which consists of a solid-state voltage source inverter coupled with a transformer that is connected in series with a transmission line. In this paper is presented the effect of SSSC for damping power system oscillation. The complete digital simulation is performed in the Matlab Simulink environment. .
Ghazanfar Shahgholian; Mehdi Mahdavian; Michael Noorani Kalteh; Mohammadreza Janghorbani
Volume 03, Issue 02 , April 2014, , Pages 73-78
Abstract
The interline power flow controller (IPFC) is a concept of the FACTS controller for series compensation which can inject a voltage with controllable magnitude and phase angle among multi lines. This paper proposes a novel IPFC-Based Damping Neuro-control scheme using PSO for damping oscillations ...
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The interline power flow controller (IPFC) is a concept of the FACTS controller for series compensation which can inject a voltage with controllable magnitude and phase angle among multi lines. This paper proposes a novel IPFC-Based Damping Neuro-control scheme using PSO for damping oscillations in a power system to improve power system stability. The addition of a supplementary controller to the IPFC main control can provide effective damping to the low frequency oscillation on the heavily loaded tie lines of interconnected power systems. However, the conventional controller designed based on a linearized model cannot provide satisfactory performance over a wide range of operation point and under large disturbances.The interline power flow controller (IPFC) is a concept of the FACTS controller for series compensation which can inject a voltage with controllable magnitude and phase angle among multi lines. This paper proposes a novel IPFC-Based Damping Neuro-control scheme using PSO for damping oscillations in a power system to improve power system stability.
