A Case Study of Retrograde Behavior in a Gas Transmission Network

1983 ◽  
Author(s):  
M.R. Ullah
Keyword(s):  
Transmission Network

scholarly journals Transmission Capacity Improvement Using Unified Power Flow Controller with New Control Strategy

2021 ◽  
pp. 225-232
Author(s):  
Moe Moe Oo ◽  
◽  
Myint Thuzar
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Power Flow ◽  
Transmission Capacity ◽  
System Response ◽  
Unified Power Flow Controller ◽  
Transmission Network ◽  
Flow Controller ◽  
Power Flow Controller

This paper presents Unified Power Flow Controller (UPFC) with a new control strategy to improve the transmission capacity in power system network. With the growing demand of electricity, it is not possible to erect new lines to face the situation. Therefore UPFC is optimally utilizes to enhance the existing transmission network. A detail explanation of the controllers for both shunt and series converters of UPFC and DC link capacitor rating are presented in this study. To justify the performance of the UPFC model, 230kV transmission system in Upper Myanmar National Grid is considered as case study. The proposed control system performance is checked by applying different faults across a transmission line to which UPFC is connected. This is necessary because of the chance for occurance of fault is larger for this case study network. And, loading condition is changed to study the control system response. The simulation results show the effectiveness and suitable performance of the control strategy at improving transmission capacity. Transmission network model and all simulations have been done using MATLAB/Simulink software.

scholarly journals Distribution Factor Method Modified for Determine of Load Contribute based on the Power Factor in Transmission Line

2018 ◽  
Vol 11 (3) ◽  
pp. 1236
Author(s):  
Syarifuddin Nojeng ◽  
Syamsir Syamsir ◽  
Arif Jaya ◽  
Andi Syarifuddin ◽  
Mohammad Yusri Hassan
Keyword(s):  
Power Factor ◽  
Power Flow ◽  
Pricing Strategy ◽  
Transmission Network ◽  
Distribution Factor ◽  
Load Power ◽  
Transmission Cost ◽  
Actual Use ◽  
Bilateral Transaction

<p>This paper proposes a modification of distribution factor methods for identifying the load contribute in a transmission open access, with regard to the load power factor. This method may be considered as the first pricing strategy to be proposed in bilateral transaction for transmission usage, based on the actual use of the transmission network. The merit of this method relies on the existence of a load power factor with GLDF  methods, which allocate the  transmission cost, not only based on the amount of power flow but also on the load characteristic. A case study utilizing the IEEE 30-bus system was conducted to illustrate the contribution of the proposed method in allocating the transmission usage to the user in a fair manner.</p>

scholarly journals Advanced and Rapid Tool in Control Room to Determine the Cause and Location of Events in Transmission Network

2020 ◽  
Vol 69 (4) ◽  
pp. 25-29
Author(s):  
Igor Ivanković ◽  
Ksenija Žubrinić-Kostović ◽  
Ana Kekelj ◽  
Zoran Bunčeć ◽  
Per Andersson ◽  
...  
Keyword(s):  
Data Exchange ◽  
Fault Location ◽  
New Technologies ◽  
Processing System ◽  
Transmission Network ◽  
Control Room ◽  
Operating Personnel ◽  
Scada System ◽  
Alarm Processing

Operating personnel in control room act on SCADA alarm generated on data from station computer. Using new technologies and advanced technical solutions assistance tool can be designed. This tool provides quick help in busy situations for operator. For this new tool with three types of case studies insight will be given in this paper. Introduction part has short information about numbers of alarms and events in Control centre, and their distribution during one month period. Basic principles for alarm handling in SCADA system is given with all limitations. New tool, Intelligent Alarm Processing system is designed and implemented in control room. It has connection to SCADA system with standard data exchange format CIM/XML and run in real time, with only few seconds delay. This system based on Multilevel Flow Model has root cause analyses implemented for power system. Detail fault location algorithm description with block scheme for this Intelligent Alarm Processing system is part of third chapter. Special attention must be paid for modelling protection data in SCADA system which are sent to this new tool. Demonstration of Intelligent Alarm Processing system operation is reported in fourth chapter. Three characteristic disturbances in transmission network were elaborated. Most complex and challenging disturbances for operator in control room is cascading event. This case study is presented in detail in four sequences through graphical user interface. Second case study is also challenging for operators, heavy winter storm with numerous isolated events. In this case study very effective graphical presentation and alarm list with three types, primary event, consequences and detail list for this events were demonstrated. This list pointed out exactly and clearly what happened in the network. Last case study presents common disturbances which appears on daily basis, where this tool is of great assistance because it points on transmission elements very fast.

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