Flexible heat and power load control of subcritical heating units based on energy demand-supply balance

Wei Wang, Xinyan Xie, Wei Yu, Yong Hu and Deliang Zeng

Energy, 2024, vol. 313, issue C

Abstract: To fulfill the requirement for enhancing the flexibility of heating units within the framework of renewable energy grid integration. In this study, a proposed optimal control strategy for heating units borrows the heat extraction output to perform rapid load changes; the boiler heat supply within the unit is clearly differentiated from the turbine energy demand, and formulate corresponding control signals. The coordinated control of the boiler and turbine based on the energy demand-supply balance of the unit as secondary control for the final load accuracy, ensuring its safe and stable operation. To further enhance the control performance, an improved sparrow optimization algorithm with butterfly search is designed to adjust the controller parameters. Finally, field tests on a 300 MW subcritical heating unit reveal that the automatic generation control performance index is improved by 32.16 % compared to the traditional coordinated control strategy, while taking less impact on the heat user. These results validate the exceptional performance and significant practical value of the optimized control strategy.

Keywords: Heating units; Energy demand-supply balance; Fractional-order PID; Sparrow search algorithm; Unit flexibility (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:313:y:2024:i:c:s0360544224035618

DOI: 10.1016/j.energy.2024.133783

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