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Optimization of Dispatching Electricity Market with Consideration of a Solar-Assisted Coal-Fired Power Generation System

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Listed:
  • Rongrong Zhai

    (School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China)

  • Lingjie Feng

    (School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China)

  • Hai Yu

    (CSIRO Energy, 10 Murray Dwyer Circuit, Mayfield West, NSW 2304, Australia)

  • Chao Li

    (School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China)

  • Yongping Yang

    (School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China)

Abstract

This study investigates the multi-objective optimization of load dispatch of a solar-assisted coal-fired power generation system. The improved environmental/economic load dispatch model considers coal consumption, NO x emissions, and power purchase cost. The singular weighted method is utilized to solve this multi-objective and multi-constraint optimization problem. A power system that includes five power generators, one of which is retrofitted to a solar-assisted coal-fired unit, is also analyzed. It can be concluded that the loads of solar-assisted coal-fired units are higher than the original coal-fired unit, and with the increase of solar radiation, the gap between the loads of two units also increases. In addition, after retrofitting, the coal consumption, the NO x emission, and power costs of units reduce by about 2.05%, 0.45%, and 0.14%, respectively. From the study on the on-grid power tariff, where the tariff drops from 16.29 cents/kWh to 3.26 cents/kWh, NO x emissions drop from 12.31 t to 11.28 t per day, a reduction of about 8.38%. The cost of purchasing electricity decreases from $ 2,982,161.8 to $ 2,020,505.0 per day, a decrease of 32.25%. Therefore, when both coal-fired units and solar-assisted coal-fired units exist in a region, the use of solar-assisted coal-fired power generation units should be prioritized.

Suggested Citation

  • Rongrong Zhai & Lingjie Feng & Hai Yu & Chao Li & Yongping Yang, 2019. "Optimization of Dispatching Electricity Market with Consideration of a Solar-Assisted Coal-Fired Power Generation System," Energies, MDPI, vol. 12(7), pages 1-16, April.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:7:p:1284-:d:219697
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    References listed on IDEAS

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