scholarly journals Available Transfer Capability (ATC) as Index for Transmission Network Performance – A Case Study of Nigerian 330kV Transmission Grid

2014 ◽  
Vol 6 (3) ◽  
pp. 479-496
Author(s):  
Ahmad Abubakar Sadiq ◽  
◽  
Mark Ndubuka Nwohu ◽  
Agbachi E Okenna ◽  
◽  
...  
Keyword(s):  
Network Performance ◽  
Transmission Network ◽  
Available Transfer Capability ◽  
Transmission Grid ◽  
Transfer Capability

Available Transfer Capability Determination Using Power Transfer Distribution Factors

2004 ◽  
Vol 1 (2) ◽  
Author(s):  
Dr. Paramasivam Venkatesh ◽  
Ramachandran Gnanadass ◽  
Dr.Narayana Prasad Padhy
Keyword(s):  
Open Access ◽  
Load Flow ◽  
Transmission Network ◽  
Power Transfer ◽  
Available Transfer Capability ◽  
Market Participants ◽  
Fair Competition ◽  
Transfer Capability ◽  
Network Capability ◽  
Power Transfer Distribution Factors

Electric power industries throughout the world have been restructured to introduce competition among the market participants and bring several competitive opportunities. A fair competition needs open access and non-discriminatory operation of the transmission network. Open access to the transmission system places an emphasis on the intensive use of the interconnected network reliably, which requires knowledge of the network capability. Available Transfer Capability (ATC) is a measure of the remaining power transfer capability of the transmission network for further transactions. This paper describes the assessment of ATC using AC Power transfer distribution factors (ACPTDFs) in combined economic emission dispatch (CEED) environment. The ACPTDFs are derived using sensitivity based approach for the system intact case and utilized to check the line flow limits during ATC determination. The obtained ATC results are compared with Newton Raphson Load Flow method (NRLF) to justify its accuracy. Simultaneous bilateral and multilateral wheeling transactions have been carried out on IEEE 6, 30 and 118 bus systems for the assessment of ATC. The solutions obtained are quite encouraging and useful in the present restructuring environment.

scholarly journals Available Transfer Capability Optimisation Using Evolutionary Programming

2007 ◽  
Vol 4 (2) ◽  
pp. 13 ◽  
Author(s):  
Muhammad Murtadha Othman ◽  
Bibi Norashiqin Sheikh Rahimullah
Keyword(s):  
Power Flow ◽  
Computation Time ◽  
Electric Power Industry ◽  
Evolutionary Programming ◽  
Base Case ◽  
Available Transfer Capability ◽  
Ac Power ◽  
Transfer Capability ◽  
Contingency Ranking

In a deregulated electric power industry, transmission providers are required to rapidly produce commercially viable information of available transfer capability (ATC) so that such information can help power marketers, sellers and buyers in planning, operation and reserving transmission services. ATC is a measure of the additional amount of power transfer that may flow across the interface, over and above the base case flows without jeopardizing power system security. This paper presents the ATC determination using the evolutionary programming (EP) technique using modified Gaussian formulation. The proposed EP technique has the ability in providing accurate ATC results and the computation burden caused by the AC power flow solutions are significantly reduced. The outages of critical line that adversely affect the amount of ATC are determined by performing the line contingency ranking and selection. ATC determinations have been made on the case study of Malaysian system. Comparison in terms of accuracy and computation time in estimating the ATC are made by considering the three methods which are the EP using modified Gaussian formulation (EPMG), EP using standard Gaussian formulation (EPSG) and the recursive AC power flow solution (RACPF).

Available Transfer Capability Optimisation Using Evolutionary Programming

2007 ◽  
Vol 4 (2) ◽  
pp. 13
Author(s):  
Muhammad Murtadha Othman ◽  
Bibi Norashiqin Sheikh Rahimullah
Keyword(s):  
Power Flow ◽  
Computation Time ◽  
Electric Power Industry ◽  
Evolutionary Programming ◽  
Base Case ◽  
Available Transfer Capability ◽  
Ac Power ◽  
Transfer Capability ◽  
Contingency Ranking

In a deregulated electric power industry, transmission providers are required to rapidly produce commercially viable information of available transfer capability (ATC) so that such information can help power marketers, sellers and buyers in planning, operation and reserving transmission services. ATC is a measure of the additional amount of power transfer that may flow across the interface, over and above the base case flows without jeopardizing power system security. This paper presents the ATC determination using the evolutionary programming (EP) technique using modified Gaussian formulation. The proposed EP technique has the ability in providing accurate ATC results and the computation burden caused by the AC power flow solutions are significantly reduced. The outages of critical line that adversely affect the amount of ATC are determined by performing the line contingency ranking and selection. ATC determinations have been made on the case study of Malaysian system. Comparison in terms of accuracy and computation time in estimating the ATC are made by considering the three methods which are the EP using modified Gaussian formulation (EPMG), EP using standard Gaussian formulation (EPSG) and the recursive AC power flow solution (RACPF).

scholarly journals Behavior of Power System Equilibrium Points in Dynamic Available Transfer Capability Calculation

1970 ◽  
Vol 5 (1) ◽  
pp. 242-248
Author(s):  
Mohamed Shaaban
Keyword(s):  
Power System ◽  
Equilibrium Points ◽  
Electric Power System ◽  
Mathematical Programming Problem ◽  
Available Transfer Capability ◽  
System Equilibrium ◽  
Transfer Capability ◽  
Nonlinear Mathematical Programming ◽  
Operating Constraints

Available Transfer Capability (ATC) is of fundamental importance in electric power system planning and operation. The calculation of firm ATC in a power market environment is carried out based on day-ahead market dispatch with a set of security constraints. Incorporating dynamic security constraints into the ATC calculation not only renders a heavier burden on the computational approach, but also manifests complex system behavior in the neighborhood of its equilibrium points. This paper specifically highlights exotic system characteristics encountered during dynamic ATC calculation. The problem of ATC calculation is modeled as a nonlinear mathematical programming problem to maximize the power transfer subject to system technical and operating constraints. The dynamic ATC constraints are represented via the quadratic approximation of the stable manifold of the controlling unstable equilibrium point (UEP). A case study on the IEEE WECC 3- machine, 9-bus power system is presented and analyzed.

scholarly journals Evolutionary Algorithm for Calculating Available Transfer Capability

2013 ◽  
Vol 64 (5) ◽  
pp. 1-7 ◽  
Author(s):  
Darko Šošić ◽  
Ivan Škokljev
Keyword(s):  
Power Systems ◽  
Evolutionary Algorithm ◽  
Transmission Network ◽  
Available Transfer Capability ◽  
Commercial Activity ◽  
Matlab Software ◽  
Transfer Capability ◽  
Deregulated Power Systems ◽  
Thermal Voltage ◽  
Bus System

Abstract The paper presents an evolutionary algorithm for calculating available transfer capability (ATC). ATC is a measure of the transfer capability remaining in the physical transmission network for further commercial activity over and above already committed uses. In this paper, MATLAB software is used to determine the ATC between any bus in deregulated power systems without violating system constraints such as thermal, voltage, and stability constraints. The algorithm is applied on IEEE 5 bus system and on IEEE 30 bus system.

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