Evaluation Algorithm for Bi-directional Protection Coordination in Distribution System with Distributed Generations

2011 ◽  
pp. 95-101
Author(s):  
Sohee Kim ◽  
Seongho Gi ◽  
Bangwoon Song ◽  
Seungkyou Choi ◽  
Dae-Seok Rho
Keyword(s):  
Distribution System ◽  
Distributed Generations ◽  
Evaluation Algorithm

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.

Sequence Component-Based Improved Passive Islanding Detection Method for Distribution System with Distributed Generations

2019 ◽  
Vol 20 (2) ◽  
Author(s):  
Bhatraj Anudeep ◽  
Paresh Kumar Nayak
Keyword(s):  
Distributed Generation ◽  
Distribution System ◽  
Low Cost ◽  
Rate Of Change ◽  
Islanding Detection ◽  
Detection Scheme ◽  
Small Power ◽  
Distributed Generations ◽  
Sequence Components ◽  
Detection Schemes

Abstract In distributed generation (DG) systems, the rate of change of voltage and the rate of change of frequency are the two most common and widely used simple and low-cost passive islanding detection schemes. Unfortunately, these passive islanding detection schemes find limitation for detecting the islandings that cause very small power imbalance. In this paper, an improved passive islanding detection scheme is proposed by using the two newly derived indices from the sequence components of the current signal with the conventional voltage and frequency parameters. The performance of the proposed scheme is tested for numerous islanding and non-islanding cases generated on IEEE Std 399–1997 and IEC microgrid model distribution system integrated with both inverter-interfaced and synchronous DGs through PSCAD/EMTDC. The obtained results confirm the effectiveness of the proposed scheme.

scholarly journals A Fuzzy-Multiagent Self-Healing Scheme for a Distribution System With Distributed Generations

2015 ◽  
Vol 30 (5) ◽  
pp. 2612-2622 ◽  
Author(s):  
Akram Elmitwally ◽  
Mohammed Elsaid ◽  
Mohammed Elgamal ◽  
Zhe Chen
Keyword(s):  
Distribution System ◽  
Self Healing ◽  
Distributed Generations

A Heuristic Analysis Method for the Impact of DGs to Power System Reliability

2014 ◽  
Vol 986-987 ◽  
pp. 187-191
Author(s):  
Bo Zeng ◽  
Kai Wang ◽  
Xiang Yu Kong ◽  
Yi Zeng ◽  
Qun Yang
Keyword(s):  
Distributed Generation ◽  
System Reliability ◽  
Power Distribution ◽  
Distribution System ◽  
Simulation Analysis ◽  
Analysis Method ◽  
Distributed Generations ◽  
Power Distribution System ◽  
High Penetration ◽  
The Impact

With high penetration of distributed generation connected to the grid, distribution system will have some huge impacts, and system reliability calculation models and assessment methods are changing. Based on Monte-Carlo method, a heuristic reliability analysis method for distribution system with distributed generations was proposed in the paper, which focuses on the mode of distributed generation in parallel to system power supply. Functional role of distributed generation in the power distribution system failure and distributed power adapter with load strategies were analyzed in this method. Cases simulation analysis was used to verify its effectiveness.

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