GCSC devices are implemented using fixed or switched capacitor in parallel with a pair of anti-parallel gate-commuted switches. They are connected in series of transmission and distribution lines and are commonly
60km long distribution line for the voltage profile improvement. The theoretical approach of line compensation using capacitor banks is outlined together with network limitations that should
60km long distribution line for the voltage profile improvement. The theoretical approach of line compensation using capacitor banks is outlined together with network limitations that should be rigorously respected in practices. The paper proposed simple and practical method without complex mathematical
There are several issues faced in the transmission line after adding a series capacitor. The issues are not only limited to the compensated line, but they also impact the
reactive compensation methods in the distribution network, but the effective compensation of the parallel capacitors is low when the node voltage is low, i.e., the capacity is proportional to the
Capacitors are used in Electric Utility T & D Systems to "compensate" for the extra current load of inductive devices such as motors and transformers. On distribution feeders, the effects of that current are two-fold - causing greater line losses and greater voltage drop - both of which decrease the system''s overall efficiency. Using
The effect of series compensation is ideal, that of parallel is not obvious, when the two are used simultaneously, parallel compensation can offset series compensation partly. Published in:
Change of line reactance caused by the insertion of a series capacitor: (a) one-line diagram, (b) phasor diagram, (c) one-line diagram with the inserted capacitor, and (d) phasor diagram.
There are several issues faced in the transmission line after adding a series capacitor. The issues are not only limited to the compensated line, but they also impact the performance of adjacent or uncompensated transmission lines.
When a number of capacitors are connected in parallel to get the desired capacitance, it is known as a bank of capacitors, similarly a bank of inductors. A bank of capacitors and/or inductors can be adjusted in steps by switching (mechanical).
Capacitors within the framework of the distribution system reduced the whole actual power loss, cost of real power loss, total cost capacitor banks, and improved the voltage profiles by compensating the reactive power. In this paper, the optimal allocation and sizing of the capacitor banks were determined using BWO. The proposed method was
This article presents an efficient method to prevent voltage instabilities in power distribution lines. The main novelty of the proposed approach is the faster response times
Series compensation can provide increased transmission capacity, improved voltage profile of the grid, enhanced angular stability of power corridor, damping of power oscillations, and optimizing power sharing between parallel lines. The series compensator can be implemented either as variable reactive impedance or as a controlled voltage source in series with the line.
Capacitors within the framework of the distribution system reduced the whole actual power loss, cost of real power loss, total cost capacitor banks, and improved the voltage
Voltage quality cannot meet the requirements of the load while delivering the power via a long radial distribution line, especially in rural regions due to increasing the voltage drop. The...
The use of series capacitors for compensation of the inductive reactance of long transmission lines will increase the transmission line capacity. In this work the Nigeria 330KV network, 30 bus
This paper aims to provide a method of installing capacitors to alleviate the low voltage problem of distribution network lines in some areas, and introduces a low voltage
When a number of capacitors are connected in parallel to get the desired capacitance, it is known as a bank of capacitors, similarly a bank of inductors. A bank of capacitors and/or inductors can be adjusted in steps by switching
This paper aims to provide a method of installing capacitors to alleviate the low voltage problem of distribution network lines in some areas, and introduces a low voltage compensation case of long feeder terminal based on distributed shunt compensation.
Prior to 1950s the shunt capacitor banks (SCB) were placed nearer to the main substation for capacitive reactive power compensation, it helps in improving the power factor, reduces I 2 R power losses and improving the voltage profile. SCB changes the power losses up to the point of coupling, however to get the maximum benefit it must be placed as nearer to the
Voltage quality cannot meet the requirements of the load while delivering the power via a long radial distribution line, especially in rural regions due to increasing the voltage drop. The...
Capacitors are used in Electric Utility T & D Systems to "compensate" for the extra current load of inductive devices such as motors and transformers. On distribution feeders, the effects of that current are two-fold -
The distribution line is represented by lumped elements R line-L line connected in parallel. Two power sources are connected:one with nominal voltage, and the other with a lower voltage. Download: Download high-res image (217KB) Download: Download full-size image; Fig. 4. PSIM model of control system to voltage control by connecting-disconnecting capacitors.
Compensation capacitors are used to counteract reactive current (increased power factor) and are basically either connected in parallel or in series. Compensation capa-citors are not required
In the method, the high-potential buses are identified using the sequential power loss index, and the PSO algorithm is used to find the optimal size and location of capacitors, and the authors in have developed enhanced particle swarm optimization (EPSO) for the optimal placement of capacitors to reduce loss in the distribution system.
Five capacitors are considered in the binary distribution of capacitance to maintain the efficiency of control system functionality. The accuracy of a capacitance selection is equal to ~3.1%. Also, it is mentioned that the voltage control can be ~3% with the bank of 5 capacitors (binary dispersed).
However, the research of a unique solution to overcome this problem during different load conditions and power factor is a hot research topic. Therefore, this paper discovered that the series capacitor compensation has ideal characteristics to improve voltage quality, and these characteristics are not available in other compensation techniques.
The results show that the approach works better in minimizing the operating costs and enhancing the voltage profile by lowering the power loss. Hybrid optimization of particle swarm (PSO) and sequential power loss index (SPLI) has been used to optimal capacitor allocation in radial distribution networks for annual cost reduction .
From practical point of view, it is desirable not to exceed series compensation beyond 80%. If the line is 100% compensated, it will behave as a purely resistive element and would cause series resonance even at fundamental frequency. The location of series capacitors is decided by economical factors and severity of fault currents.
On distribution feeders, the effects of that current are two-fold - causing greater line losses and greater voltage drop - both of which decrease the system’s overall efficiency. Using properly placed and sized capacitors, these effects can be reduced and even eliminated.
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