An Engineering Service Restoration Method after a 35kV Substation Outage

2014 ◽  
Vol 701-702 ◽  
pp. 1148-1152
Author(s):  
Jun Qian ◽  
Zhen Ping Yan ◽  
Qi Wei Qiu ◽  
Mei Wang ◽  
Jia Qing Zhou ◽  
...  
Keyword(s):  
Power System ◽  
Shortest Path ◽  
Power Supply ◽  
Distribution System ◽  
Shortest Path Algorithm ◽  
Real Distribution ◽  
Service Restoration ◽  
Restoration Method ◽  
Restoration Measures ◽  
Poor Stability

The distribution system is at the end of the power system and is directly connected to the energy consumers, which makes the distribution network a vital part of the power system. When a substation suffers an outage, electricity service restoration measures must be taken as soon as possible to reduce the loss. Traditional restoration methods have disadvantages such as poor stability and bad convergence. This paper proposed an approach to resume the power supply after a 35kV substation outage with the help of Dijkstra’s shortest path algorithm. The proposed method is tested on a real distribution system. The result shows that the method is effective to solve the problem of electricity service restoration.

Service Restoration of Smart Distribution System

2015 ◽  
Vol 737 ◽  
pp. 181-186
Author(s):  
Xiao Yun Huang ◽  
Fei Jin Peng ◽  
Hong Yuan Huang ◽  
Zhi Wen Xie
Keyword(s):  
Distribution System ◽  
Voltage Distribution ◽  
Distributed Generations ◽  
Medium Voltage ◽  
Whole Process ◽  
System A ◽  
Intentional Islanding ◽  
Service Restoration ◽  
Service Areas ◽  
Restoration Method

Abstract: On the condition of protecting the critical load, it is necessary to restore the service of outage area without fault as soon as possible after the occurrence of fault in smart distribution system. A fast service restoration method is proposed for medium-voltage distribution system with distributed generations, which combines intentional islanding of DGs for network reconfiguration. Under the condition of safety limits, the out of service areas are achieved maximization of restoration, making full use of DGs. The whole process of restoration is regarded as a multi-stages decision problem, and divided into four stages. Compared to the existing algorithms, this method can effectively avoid the time-consuming and search results problems, and the simulation results are better. The effectiveness and practicality of the propose approach is demonstrated by simulations on a PG&E 69-nodes system with DGs.

Fast Service Restoration of Multi-Source Active Distribution Network with Microgrids and Electric Vehicles

2014 ◽  
Vol 672-674 ◽  
pp. 1175-1178
Author(s):  
Guang Min Fan ◽  
Ling Xu Guo ◽  
Wei Liang ◽  
Hong Tao Qie
Keyword(s):  
Electric Vehicles ◽  
Distribution System ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Large Scale ◽  
Distribution Network ◽  
Active Distribution Network ◽  
Optimal Power ◽  
Service Restoration ◽  
Restoration Method

The increasingly serious energy crisis and environmental pollution problems promote the large-scale application of microgrids (MGs) and electric vehicles (EVs). As the main carrier of MGs and EVs, distribution network is gradually presenting multi-source and active characteristics. A fast service restoration method of multi-source active distribution network with MGs and EVs is proposed in this paper for service restoration of distribution network, which takes effectiveness, rapidity, economy and reliability into consideration. Then, different optimal power flow (OPF) models for the service restoration strategy are constructed separately to minimize the network loss after service restoration. In addition, a genetic algorithm was introduced to solve the OPF model. The analysis of the service restoration strategy is carried out on an IEEE distribution system with three-feeder and eighteen nodes containing MGs and EVs, and the feasibility and effectiveness are verified

scholarly journals AACO technique for solving multiobjectives in electrical distribution system

2019 ◽  
Vol 14 (3) ◽  
pp. 1076
Author(s):  
P. Ravi Babu ◽  
Srivani Molughu
Keyword(s):  
Power Supply ◽  
Distribution System ◽  
Reactive Power ◽  
Flow Analysis ◽  
Test System ◽  
Load Flow ◽  
Critical Parameters ◽  
Electrical Distribution ◽  
Ohmic Losses ◽  
Service Restoration

The multi objectives in electrical distribution system are service restoration and minimization of Ohmic losses. These objectives can be achieved by artificial ant colony optimization through reconfiguration. Service restoration is also a major aspect for reliable service. If any fault occurs in the system, faulted zone is isolated from healthy system. This originates discontinuity in power supply. To maintain the continuity in power supply there is a necessity to provide service to these loads from adjacent healthy feeders through reconfiguration without infringement of radiality, load balance and critical parameters. In distribution system Ohmic losses are 30 to 40 percent. In order to minimize these losses, there is a need for reconfiguration of the system and perform the power flow analysis to get bus voltages, branch currents and power losses (i.e. real or Ohmic or copper loss and reactive power loss). A direct load flow analysis is adopted in the proposed work. In this paper four feeder test system used for service restoration and IEEE 33 bus, IEEE 69 bus test systems for minimization of Ohmic losses have been obtained.

scholarly journals Cost-Effective Outage Management in Smart Grid under Single, Multiple, and Critical Fault Conditions through Teaching–Learning Algorithm

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6205
Author(s):  
Thiruvenkadam S ◽  
In-Ho Ra ◽  
Hyung-Jin Kim
Keyword(s):  
Power System ◽  
Power Distribution ◽  
Distribution System ◽  
Learning Algorithm ◽  
Optimal Solution ◽  
Cost Effective ◽  
Second Phase ◽  
Service Restoration ◽  
Teaching Learning ◽  
Continuous Power

A distribution system becomes the most essential part of a power system as it links the utility and utility customers. Under abnormal conditions of the system, a definitive goal of the utility is to provide continuous power supply to the customers. This demands a fast restoration process and provision of optimal solutions without violating the power system operational constraints. The main objective of the proposed work is to reduce the service restoration cost (SRC) along with the elimination of the out-of-service loads. In addition, this work concentrates on the minimal usage and finding of optimal locations for additional equipment, such as capacitor placement (CP) and distributed generators (DGs). This paper proposes a two-stage strategy, namely, the service restoration phase and optimization phase. The first phase ensures the restoration of the system from the fault condition, and the second phase identifies the optimal solution with reconfiguration, CP, and DG placement. The optimization phase uses the teaching–learning algorithm (TLA) for optimal restructuring and optimal capacitor and DG placement. The robustness of the algorithm is validated by addressing the test cases under different fault conditions, such as single, multiple, and critical. The effectiveness of the proposed strategy is exhibited with the implementation to IEEE 33-bus radial distribution system (RDS) and 83-bus Taiwan Power Distribution Company (TPDC) System.

The Service Restoration in the Distribution System with Distributed Generators Based on the Heuristic Multi-Agent Evolutionary Algorithm

2011 ◽  
Vol 354-355 ◽  
pp. 1027-1030
Author(s):  
Li Jun Yang ◽  
Wei Li Wang
Keyword(s):  
Evolutionary Algorithm ◽  
Power Supply ◽  
Distribution System ◽  
Optimization Problem ◽  
Distribution Network ◽  
Multi Objective Optimization ◽  
Distributed Generators ◽  
Service Restoration ◽  
Multi Agent ◽  
Restoration Problem

In view of a large number of distributed generators penetrated into distribution network, an improved hierarchical island operation was proposed to make the DG play the role as backup power supply in the service restoration of the distribution network; As the renewable distributed generators was strongly advocated, A new mathematical model was proposed to make full use of them. The service restoration problem is a constrained multi-objective optimization problem, a new algorithm which was the combination the heuristic algorithm and multi-agent evolutionary algorithm was proposed, it improved the multi-agent evolutionary algorithm with the Niche technologies to ensure the variety of the populations in the post-optimization and used the adaptive updating strategy to improve the convergence speed. The results of a case show feasibility and correctness of the model and the algorithm.

A Service Restoration Method for Multiple Faults in Distribution Systems Based on Load Balancing Distribution

2014 ◽  
Vol 1023 ◽  
pp. 160-167
Author(s):  
Guo Fang Zhu ◽  
Hou Lei Gao ◽  
Tian You Li
Keyword(s):  
Load Balancing ◽  
Distribution System ◽  
Distribution Systems ◽  
Fault Current ◽  
Fault Recovery ◽  
Multiple Faults ◽  
Single Fault ◽  
Service Restoration ◽  
Traditional Service ◽  
Restoration Method

Current service restoration methods in distribution systems mainly focus on the single fault. When the distribution system deals with more than one fault, current service restoration methods will not be applicable. A service restoration method for multiple faults is proposed to solve the problem mentioned above. Fault outage areas connected through a loop switch compose an unaided fault recovery area which is regarded as a service restoration unit. In order to eliminate the interaction of communal feeders which are connected to more than one unaided fault recovery area, each communal feeder is decoupled into multiple virtual feeders which are assigned to corresponding unaided fault recovery areas based on load balancing distribution. After the process above, the fault recovery area of multiple faults is divided into several independent fault recovery areas and each independent fault recovery area can be restored by traditional service restoration methods. So the contribution of this algorithm is to solve the problem of service restoration of multiple faults. The result of a calculation example proved the validity of the algorithm.

scholarly journals Application of Auto-Switched Capacitor Bank to Mitigate Voltage Collapse Problem in Distribution System; A Case Study of Osogbo South –Western, Nigeria.

2018 ◽  
Vol 6 (07) ◽  
Author(s):  
Okelola, M. O.
Keyword(s):  
Power System ◽  
Power Supply ◽  
Distribution System ◽  
Reactive Power ◽  
Capacitor Bank ◽  
Electrical Power ◽  
System Stability ◽  
Switched Capacitor ◽  
Voltage Collapse

Exponential demand for electrical power supply caused by increased use of electricity at both domestic and industrial level pose threat to power system stability. The need to enhance power system with adequate compensation via reactive power supply becomes a necessity. This paper therefore presents application of auto-switched capacitor bank to mitigate voltage collapse problem; a case study of Osogbo South-Western, Nigeria. The proposed approach carefully design the correct size of capacitor required to supply the reactive power needed for compensation. The obtained values were used to model the power system. The modeled system was subjected to disturbances with a view to investigate its performance. The results obtained showed that the designed capacitor bank was able to stabilize the voltage on the line despite the heavy loads on the power system.

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