Voltage Stability Assessment in Radial Distribution Power System

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Shivley Sageer ◽  
Om Sharma ◽  
Ratul Rana Patel ◽  
Ruchika Khare
Keyword(s):  
Power System ◽  
Radial Distribution ◽  
Distribution System ◽  
Voltage Stability ◽  
Voltage Drop ◽  
Distribution Networks ◽  
Critical Conditions ◽  
Stability Assessment ◽  
Radial Distribution Networks ◽  
Heavy System

The voltage stability problem of distribution networks is associated with a rapid voltage drop because of heavy system load. To operate the distribution system under such critical conditions the integration of distributed resource improves the reliability of supplying power by improving voltage stability and reducing the power losses. This paper presents voltage stability analysis of radial distribution networks in the presence of distributed generation. The analysis is accomplished using different methods which can be evaluated at each node of the distribution system. In this paper study the all types of methods which is used to improve the Voltage Stability Assessment in radial distribution power system.

Swarm-Intelligence-Based Optimal Placement and Sizing of Distributed Generation in Distribution Network

2018 ◽  
pp. 29-48 ◽  
Author(s):  
Mahesh Kumar ◽  
Perumal Nallagownden ◽  
Irraivan Elamvazuthi ◽  
Pandian Vasant ◽  
Luqman Hakim Rahman
Keyword(s):  
Distributed Generation ◽  
Radial Distribution ◽  
Distribution System ◽  
Voltage Stability ◽  
Reactive Power ◽  
Distribution Network ◽  
Stability Index ◽  
Pso Algorithm ◽  
Distribution Networks ◽  
Optimal Placement

In the distribution system, distributed generation (DG) are getting more important because of the electricity demands, fossil fuel depletion and environment concerns. The placement and sizing of DGs have greatly impact on the voltage stability and losses in the distribution network. In this chapter, a particle swarm optimization (PSO) algorithm has been proposed for optimal placement and sizing of DG to improve voltage stability index in the radial distribution system. The two i.e. active power and combination of active and reactive power types of DGs are proposed to realize the effect of DG integration. A specific analysis has been applied on IEEE 33 bus system radial distribution networks using MATLAB 2015a software.

scholarly journals A Novel Analytical Approach for Optimal Placement and Sizing of Distributed Generations in Radial Electrical Energy Distribution Systems

2021 ◽  
Vol 13 (18) ◽  
pp. 10224
Author(s):  
Sasan Azad ◽  
Mohammad Mehdi Amiri ◽  
Morteza Nazari Heris ◽  
Ali Mosallanejad ◽  
Mohammad Taghi Ameli
Keyword(s):  
Radial Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Voltage Stability ◽  
Reducing Power ◽  
Distribution Networks ◽  
Active Power ◽  
Optimal Placement ◽  
Power Losses ◽  
Active Power Losses

Considering the strong influence of distributed generation (DG) in electric distribution systems and its impact on network voltage losses and stability, a new challenge has appeared for such systems. In this study, a novel analytical algorithm is proposed to distinguish the optimal location and size of DGs in radial distribution networks based on a new combined index (CI) to reduce active power losses and improve system voltage profiles. To obtain the CI, active power losses and voltage stability indexes were used in the proposed approach. The CI index with sensitivity analysis was effective in decreasing power losses and improving voltage stability. Optimal DG size was determined based on a search algorithm to reduce active power losses. The considered scheme was examined through IEEE 12-bus and 33-bus radial distribution test systems (RDTS), and the obtained results were compared and validated in comparison with other available methods. The results and analysis verified the effectiveness of the proposed algorithm in reducing power losses and improving the distribution system voltage profiles by determining the appropriate location and optimal DG size. In IEEE 12 and 33 bus networks, the minimum voltage increased from 0.9434 p.u and 0.9039 p.u to 0.9907 p.u and 0.9402 p.u, respectively. Additionally, the annual cost of energy losses decreased by 78.23% and 64.37%, respectively.

scholarly journals Studi Analisis Perbandingan Rugi Daya Pada Titik Sambung Pierching Connector Dengan Line Tap Connector Pada Jaringan Tegangan Rendah

2018 ◽  
Vol 3 (1) ◽  
pp. 24
Author(s):  
Ahmad Syaifuddin F ◽  
Arief Budi Laksono ◽  
Suharijanto Suharijanto
Keyword(s):  
Power System ◽  
Distribution System ◽  
Power Loss ◽  
Low Voltage ◽  
Voltage Drop ◽  
Distribution Network ◽  
Distribution Networks ◽  
Channel Network ◽  
Medium Voltage ◽  
Secondary Distribution

Distribution system is divided into primary and secondary distribution networks. The primary distribution network is the network of the substation to the distribution, while the secondary distribution is the channel network from the substation transformer is distributed to the consumer or the load. Primary distribution network is better known as medium voltage network (JTM 20kV) while secondary distribution is low voltage network (JTR 220 / 380V). The distribution network is part of the power system closest to the customer or the load compared to the transmission network.At this time PT. PLN (Persero) experiencing power loss that occurs at the point of connection of low voltage on the use of pierching connector. This study is to analyze the calculation of loss of  power at low voltage network (JTR) by doing comparison of measurement between input with output at connection point of pierching connector with line tap connector. For  conditions required evaluation and analysis for replanning that takes into account the planning criteria such as voltage  drop and take into account the loss of power.

scholarly journals A hybrid algorithm for voltage stability enhancement of distribution systems

2022 ◽  
Vol 12 (1) ◽  
pp. 50
Author(s):  
Hazim Sadeq Mohsin Al-Wazni ◽  
Shatha Suhbat Abdulla Al-Kubragyi
Keyword(s):  
Radial Distribution ◽  
Distribution System ◽  
Hybrid Algorithm ◽  
Distribution Systems ◽  
Voltage Stability ◽  
Distribution Networks ◽  
Optimal Operation ◽  
Total Power ◽  
Optimal Size ◽  
Voltage Profile

This paper presents a hybrid algorithm by applying a hybrid firefly and particle swarm optimization algorithm (HFPSO) to determine the optimal sizing of distributed generation (DG) and distribution static compensator (D-STATCOM) device. A multi-objective function is employed to enhance the voltage stability, voltage profile, and minimize the total power loss of the radial distribution system (RDS). Firstly, the voltage stability index (VSI) is applied to locate the optimal location of DG and D-STATCOM respectively. Secondly, to overcome the sup-optimal operation of existing algorithms, the HFPSO algorithm is utilized to determine the optimal size of both DG and D-STATCOM. Verification of the proposed algorithm has achieved on the standard IEEE 33-bus and Iraqi 65-bus radial distribution systems through simulation using MATLAB. Comprehensive simulation results of four different cases show that the proposed HFPSO demonstrates significant improvements over other existing algorithms in supporting voltage stability and loss reduction in distribution networks. Furthermore, comparisons have achieved to demonstrate the superiority of HFPSO algorithms over other techniques due to its ability to determine the global optimum solution by easy way and speed converge feature.

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