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access icon free Optimal tripping transmission lines scheme based on SCC level and voltage stability

  • Author(s): Shuaihu Li 1, 2 ; Zheng Zhu 3 ; Yiquan Li 3
    • View affiliations
    • Affiliations: 1: College of Information Engineering, Xiangtan University, Xiangtan 411105, People's Republic of China ;
      2: Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool L69 3GJ, UK ;
      3: Electric Power Dispatching and Control Center of Guangdong Power Grid Co., Ltd., Guangzhou 510600, Guangdong, People's Republic of China
  • Source: Volume 11, Issue 7, 11 May 2017, p. 1709 – 1715
    DOI:  10.1049/iet-gtd.2016.1305 , Print ISSN 1751-8687, Online ISSN 1751-8695
© The Institution of Engineering and Technology
Received 21/08/2016, Accepted 17/01/2017, Revised 12/01/2017, Published 21/02/2017

The transmission capacity of the power grid is growing to meet the increasing electrical load demand in the past few decades. It makes the level of severity that short-circuit current (SCC) exceeds the interruption capability of circuit breakers much higher. To limit SCC, this study proposes a bi-objective optimisation model to determine the optimal tripping transmission lines scheme. In this proposed model, the objectives include the maximal effectiveness on limiting SCC and the minimal adverseness on voltage stability, which evaluate by the sensitivities of SCC and voltage stability margin on the tripping lines. Intelligence algorithms have been applied to solve the similar multi-objective problem. However, the optimisation methods cannot meet the requirement of the real-time application because the full-dimensional set of decision variables including all transmission lines is considered in the optimisation procedure. Thereby, the coordinated optimisation algorithm is adapted to accurately and fast achieve the optimal solution. The case study on the IEEE 39-bus system and a real-world 500 kV network in Guangdong province of China verify the effectiveness and practicality of the proposed method.

Inspec keywords: short-circuit currents; power grids; power transmission lines; optimisation; load management

Other keywords: biobjective optimisation model; China; voltage stability margin; multiobjective problem; optimal tripping transmission lines scheme; SCC level; intelligence algorithms; real-world network; short-circuit current level; electrical load demand; power grid transmission capacity; IEEE 39-bus system; Guangdong province

Subjects: Power transmission lines and cables; Optimisation techniques; Power system management, operation and economics

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