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The performance improvement of Security Constrained Unit Commitment using Benders Decomposition method and Line Outage Distribution Factors
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Parnian Mohammadi pour   , Seyed Mohsen Seyed Mosavi * |
| Department of Electrical Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran |
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Abstract: (274 Views) |
| Security Constrained Unit Commitment is a practical way for the system operator to plan and operate in real time. Considering the transmission system and security constraints can lead to different responses to load distribution. One of the solutions to solve problems in the circuit of units with large-scale security constraints is to use the Benders analysis method. But strengthening the way the problem is written puts a big difference on the speed of solution and the computational volume the purpose of this research is existing N-K constraint might lead possibility to ignore some other constraints and minimize the calculation. In the proposed model, studied faults are identified in a loop, and power flow control are proceeded by adding necessary constraints. In each step, transmission system constrains are defined, and in case any overloading occurs, relating constrain is going to be activated in the following step. This strategy defines necessary constraints in each hour and line. Also, sensitive network lines which are overloaded due to lines subjected to fault exit could be defined. Considering the mentioned issues, the importance of Unit Commitment and optimal solution proposition in large scale, in the thesis we are going to analyze the unit commitment by using line outage distribution factor and its combination with N-K security constraint. The calculation volume in large scale could be decreased by applying this strategy, thus, the computation is fast-speed. On the other hand, all the computations and comparisons are applied on IEEE 118-bus network using GAMS software and MATPOWER tool to analyze power distribution factors. A repeating constraint identification loop is employed to implement N-K constraint, and results show the loop reduces the computation time. In the proposed method, the sensitive lines and their operation conditions are identified that the appropriate response can be achieved in the fault conditions. |
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| Keywords: security constrained, unit commitment, line outage distribution factors, N-K criterion |
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Full-Text [PDF 1080 kb]
(209 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2021/06/24 | Accepted: 2021/10/19 | Published: 2021/11/9
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