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A Novel Market Clearing and Safety Checking Method for Multi-Type Units That Considers Flexible Loads

Author

Listed:
  • Dong Hua

    (School of Electric Power, South China University of Technology, Guangzhou 510641, China)

  • Wutao Chen

    (School of Electric Power, South China University of Technology, Guangzhou 510641, China)

  • Cong Zhang

    (School of Electrical and Information Engineering, Hunan University, Changsha 410082, China)

Abstract

Flexible loads have flexibility and variability in time and space, and they have been widely studied by scholars. However, the research on the participation of flexible loads in market clearing and safety checking is still insufficient. We propose a market clearing and safety checking method for multi-type units that considers flexible loads. First, the flexible load is divided into reducible loads, shiftable loads, and convertible loads, and its mathematical model is established. Then, the convertible loads are considered in the market clearing model, and the power management agency executes the market clearing procedure to obtain the clearing result. When the line power exceeds the limit as a result of clearing, the power flow of the branches and sections is eliminated by adjusting the unit output and reducing the flexible load at the same time, and a safety checking model considering load reduction is established. The marginal electricity price of the nodes is obtained by the interior point method, and we solve the model by calling the CPLEX (v12.7.1) solver in GAMS (General Algebraic Modeling System v24.9.1). We use a regional power grid of 220 kV and above as an example for analysis; the results show that the proposed method can reduce the marginal electricity price of the nodes, reduce the cost of safety checking, and improve the safety of the market clearing.

Suggested Citation

  • Dong Hua & Wutao Chen & Cong Zhang, 2020. "A Novel Market Clearing and Safety Checking Method for Multi-Type Units That Considers Flexible Loads," Energies, MDPI, vol. 13(15), pages 1-20, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3771-:d:388148
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    References listed on IDEAS

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    1. Severin Borenstein & James. Bushnell & Steven Stoft, 2000. "The Competitive Effects of Transmission Capacity in A Deregulated Electricity Industry," RAND Journal of Economics, The RAND Corporation, vol. 31(2), pages 294-325, Summer.
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