Transmission Network Expansion Planning Using Reliability and Economic Assessment

Kim, Wook-Won;Son, Hyun-Il;Kim, Jin-O

  • 투고 : 2014.11.27
  • 심사 : 2015.03.04
  • 발행 : 2015.05.01


This paper presents a probabilistic approach of reliability evaluation and economic assessment for solving transmission network expansion planning problems. Three methods are proposed for TNEP, which are reorganizing the existing power system focused on the buses of interest, selecting candidates using modified system operating state method with healthy, marginal and at-risk states, and finally choosing the optimal alternative using cost-optimization method. TNEP candidates can be selected based on the state reliability such as sufficient and insufficient indices, as proposed in this paper. The process of economic assessment involves the costs of construction, maintenance and operation, congestion, and outage. The case studies are carried out with modified IEEE-24 bus system and Jeju island power system expansion plan in Korea, to verify the proposed methodology.


Transmission network expansion planning (TNEP);State probability;Reliability evaluation;Economic assessment


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