scholarly journals A modal analysis based on reactive power compensation on 6-bus Oman electrical grid

2021 ◽  
Vol 12 (2) ◽  
pp. 757
Author(s):  
Adnan Saif Al Mamari ◽  
Siti Fauziah Toha ◽  
Salmiah Ahmad ◽  
Ali Salim Al Mamari
Keyword(s):  
Modal Analysis ◽  
Reactive Power ◽  
Stability Margin ◽  
Electrical System ◽  
Peak Period ◽  
Electrical Grid ◽  
Capacitor Banks ◽  
Voltage Stability Margin ◽  
Eigen Values ◽  
Analysis Application

This paper covers the modal analysis application (MATLAB 2019a) for improving the voltage profiles by optimum positioning of the capacitor banks for 6-bus Oman Electrical System because the Oman electricity TransmissionCompany (OETC) is suffering of drop voltage in these 6 buses especially during summer season as a peak period. The Newton-Raphson (N-R) method will help to determine the required reactive power for each load bus and as well the ideal position or point of capacitors. The process aims to maintain the Q-V relations of the electrical grid by correlating the lowest Eigen-values to related Eigen-vectors in obtained Jacobian matrix. It depends on the Eigen-values, if they are positive then the system’s voltage is stable otherwise it is not stable. In a stable system, the potential voltage collapse could be anticipated by checking the participation factors for a group of minimal positive Eigen-values. In general, the critical weak bus is associated with lowerEigen-values. Electrical system collapse is attributable to the weakest bus in the network and it could be avoided by determining the weak buses and providing capacitor banks at suitable locations which will lead to improve the voltage stability margin.

Differential Evolution Technique for the Optimization of Reactive Power Reserves

2017 ◽  
Vol 26 (10) ◽  
pp. 1750155 ◽  
Author(s):  
Biplab Bhattacharyya ◽  
Saurav Raj
Keyword(s):  
Differential Evolution ◽  
Modal Analysis ◽  
Voltage Stability ◽  
Reactive Power ◽  
Stability Margin ◽  
Optimization Techniques ◽  
Planning Problem ◽  
Power Sources ◽  
Voltage Stability Margin ◽  
Reactive Power Planning

In the present work, reactive power planning problem along with voltage stability margin is addressed by effective co-ordination of reactive power sources. Modal analysis and L-index methods are used to detect weak nodes of the system accordingly. Differential Evolution (DE) and Genetic Algorithm (GA)-based optimization techniques are applied for the proper co-ordination of Var sources under base and increased loading conditions maintaining voltage stability of the connected power network. The problem is multi-objective and IEEE 30 bus system is taken as the standard system. It is observed that modal analysis based detection of weak nodes are more effective than the L-index-based detection. Moreover, the DE-based optimization algorithm gives better result compared to GA-based approach in maximizing reactive power reserves.

scholarly journals VORTEX OPTIMIZATION ALGORITHM FOR SOLVING OPTIMAL REACTIVE POWER DISPATCH PROBLEM

2018 ◽  
Vol 6 (1) ◽  
pp. 266-276
Author(s):  
K. Lenin
Keyword(s):  
Reactive Power ◽  
Solution Space ◽  
Stability Margin ◽  
Solution Procedure ◽  
Problem Solution ◽  
Static Voltage Stability ◽  
Optimal Reactive Power Dispatch ◽  
Voltage Stability Margin ◽  
Vortex Nature ◽  
Power Problem

In this paper, a new Vortex Optimization (VO) algorithm is proposed to solve the reactive power problem. The idea is generally focused on a typical Vortex flow in nature and enthused from some dynamics that are occurred in the sense of Vortex nature. In a few words, the algorithm is also a swarm-oriented evolutional problem solution methodology; since it comprises numerous techniques related to removal of feeble swarm members and trying to progress the solution procedure by supporting the solution space through fresh swarm members. In order to evaluate the performance of the proposed Vortex Optimization (VO) algorithm, it has been tested in Standard IEEE 30 bus systems and compared to other standard algorithms. Simulation results reveal about the best performance of the proposed algorithm in reducing the real power loss and static voltage stability margin index has been enhanced.

scholarly journals Voltage stability analysis using STATCOM

2021 ◽  
Author(s):  
Umang Patel
Keyword(s):  
Power System ◽  
Power Control ◽  
Voltage Stability ◽  
Reactive Power ◽  
Stability Margin ◽  
Power System Stability ◽  
System Stability ◽  
Transmission Network ◽  
Voltage Stability Margin ◽  
Three Phase

Power system stability is gaining importance because of unusual growth in power system. Day by day use of nonlinear load and other power electronics devices created distortions in the system which creates problems of voltage instability. Voltage stability of system is major concerns in power system stability. When a transmission network is operated near to their voltage stability limit it is difficult to control active-reactive power of the system. Our objectives are the analysis of voltage stability margin and active-reactive power control in proposed system which includes model of STATCOM with aim to analyse its behavior to improve voltage stability margin and active-reactive power control of the system under unbalanced condition. The study has been carried out using MATLAB Simulation program on three phase system connected to unbalanced three phase load via long transmission network and results of voltage and active-reactive power are presented. In future work, we can do power flow calculation of large power system network and find the weakest bus of the system and by placing STATCOM at that bus we can improve over all stability of the system

scholarly journals Pengaruh Penggunaan Kapasitor Bank pada Penyulang Kota di PT. PLN (Persero) Rayon Meulaboh Kota

2020 ◽  
Vol 1 (2) ◽  
pp. 21-28
Author(s):  
Haimi Ardiansyah
Keyword(s):  
Electric Power ◽  
Power Factor ◽  
Power Plants ◽  
Reactive Power ◽  
Capacitor Bank ◽  
Active Power ◽  
Electrical System ◽  
Capacitor Banks ◽  
Absolute Requirement ◽  
Electric Supply

Haimi Ardiansyah Akademi Komunitas Negeri Aceh Barat _________________________ Abstract Penelitian ini membahas tentang pengaruh penggunaan kapasitor bank pada penyulang kota di PT. PLN (Persero) Rayon Meulaboh Kota. Pendistribusian tenaga listrik yang stabil adalah syarat mutlak yang harus dipenuhi PT. PLN (Persero) dalam menjawab kebutuhan konsumen. Bertambahnya beban yang bersifat induktif akan berpengaruh pada penurunan nilai faktor daya pada sistem kelistrikan. Selanjutnya kondisi ini juga akan membutuhkan daya reaktif yang sangat besar sehingga pembangkit listrik harus menyalurkan daya yang lebih besar. Salah satu upaya untuk memperbaiki faktor daya adalah dengan menambahkan beban kapasitif. Perbaikan faktor daya pada penyulang kota dengan menggunakan kapasitor bank bertujuan untuk meningkatkan daya aktif sehingga mendekati dengan daya semu yang diproduksi PT. PLN. Penggunakan kapasitor bank ini diharapkan mampu menurunkan daya reaktif dan memperbaiki faktor daya pada penyulang kota. Keywords: Daya Listrik, Daya Reaktif, Faktor daya, Kapasitor Bank __________________________ Abstrak The study discusses the effect of installing bank capacitor on city electric feeder at PT. PLN (Persero) Rayon Meulaboh Kota. Stable electric supply is an absolute requirement that must be met by PT. PLN (Persero) in answering consumer needs. The increase of inductive loads will affect the decrease power factor value in the electrical system. Furthermore, this condition will also require a very large reactive power so that power plants have to supply more electric power. Installing capacitive loads is one of the best options in improving the power factor. The improvement of power factor in city feeders using capacitor banks aims to increase the active power to get close to the apparent power which is produced by PT. PLN (Persero). In short, the use of capacitor banks is expected to reduce reactive power and improve the power factor in city feeders. Kata Kunci: Electric Power, Reactive Power, Power Factor, Capacitor Bank __________________________

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