Power
Sadegh Rekabeslami Zadeh; Gholamali Torabi; Sasan Najafi Birgani; Mehdi Enayat Zare; Mostafa Sarlak
Abstract
Capacitor banks are commonly used in power grids for purposes such as power control and power factor correction. Capacitor banks are exposed to high-amplitude and high-frequency currents in circuit breaker switching. Also, if a fault occurs near the substation where the capacitor bank is installed, the ...
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Capacitor banks are commonly used in power grids for purposes such as power control and power factor correction. Capacitor banks are exposed to high-amplitude and high-frequency currents in circuit breaker switching. Also, if a fault occurs near the substation where the capacitor bank is installed, the energy stored in the capacitor bank at the fault location is discharged. The discharge of this energy causes currents to pass through at a high frequency and in large quantities. These high currents cause damage to the circuit breaker. To prevent these deleterious effects, the use of transient limiting reactor in capacitor banks is recommended. In this paper, an algorithm for determining the desirability of the amount of transient limiting reactors in shunt capacitor banks is designed based on the IEC Std 62271 standard. The algorithm was then developed for use in the electrical industry in the form of a software called Transient Analyzer. In the developed software, the C# programming language is used to develop and implement algorithms and data processing. The software has been tested and debugged using data from 20 regional electricity substations in Khuzestan. The proposed software is highly efficient compared to the conventional simulation method and can be used with simple data entry and fast processing and presentation of results and data analysis in a short time.
Power
Iman Ali Hassanvand; Javad Ebrahimi; Mahyar Abasi
Abstract
The dominant measures taken in distribution networks to solve the voltage instability problem include feeder reconfiguration techniques, allocation of capacitor banks, use of tap changers, etc. However, these traditional methods suffer from numerous issues. Many studies have been carried out to solve ...
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The dominant measures taken in distribution networks to solve the voltage instability problem include feeder reconfiguration techniques, allocation of capacitor banks, use of tap changers, etc. However, these traditional methods suffer from numerous issues. Many studies have been carried out to solve these problems in recent years. Compared with traditional methods, reactive power control (RPC) of photovoltaic (PV) inverters does not require additional investment, and given that PV inverters often function at a capacity below their rated value, the excess capacity can be utilized to assist in supplying reactive power to the grid. However, achieving voltage regulation in imbalanced distribution networks via RPC is a complex issue. Hence, the primary objective of this work is to utilize the reactive power capacity of photovoltaic inverters to achieve decentralized regulation of the effective voltage of the network using a consensus algorithm and a PID controller in two stages.
Power
Musa Khosravi; Saeed Hasanvand; Mahyar Abasi; Mohammad Esmaeil Hassanzadeh
Abstract
Considering the challenges of using fossil fuels, including price, pollution, and the increasing development of electric vehicles, the energy supply from other sources should be considered. One of the main challenges of electric vehicles is their impact on the distribution network, especially the time ...
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Considering the challenges of using fossil fuels, including price, pollution, and the increasing development of electric vehicles, the energy supply from other sources should be considered. One of the main challenges of electric vehicles is their impact on the distribution network, especially the time of charging and its coincidence with the peak load of the network, which causes an increase in power consumption, double pressure on the network, and more and faster depreciation of distribution network equipment. Also, producing more energy during peak times leads to increased costs and air pollution. In this paper, the use of renewable energy to charge electric vehicles is investigated in such a way that the consumers of electric vehicles use solar panels and batteries to store solar energy so that it can be used for charging during peak times. The costs of installing solar panels, the consumption of electric vehicles, the amount of energy generation, as well as the emission of fossil fuel pollutants that fossil power plants produce at peak times have been investigated. Furthermore, a comparison has been made between the use of renewable and non-renewable energy. Consequently, the proposed method is about 112494 dollars more economical than the system without renewable energy. It is also suggested to consider incentives from the government for the consumer to reduce the capital and operating cost of the photovoltaic system to diminish the investment return time.