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Operational control of an integrated drum boiler of a coal fired thermal power plant

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  • Chandrasekharan, Sreepradha
  • Panda, Rames C.
  • Swaminathan, Bhuvaneswari Natrajan
  • Panda, Atanu

Abstract

Boiler in thermal-power-plant plays important role in generation of power. Conventional subcritical-boilers use single-loop controls which are less efficient. An effective control of temperature and pressure of boiler is necessary to enable safe power generation. This article discusses application of three different multivariable-control strategies, namely, PID (Proportional-Integral- Derivative), MPC (Model Predictive Controller) and Inverse-decoupling-control to the individual units of boiler (economizer, drum, super-heater) as well as to the integrated boiler unit of the coal-fired thermal-power-plant separately. The mathematical-model derived based on mass-balance and energy-balance equations of economizer, drum and superheater units are used for the synthesis of controller. The non-square nature of mathematical-model carries complexity in the design of controllers. The performances, based on minimization of objective-function containing closed-loop error along with the control-effort of individual and integrated units, of the boiler using IMC (Internal-Model-Control) based PID, Inverse-decouple and MPC in the presence of disturbances are analyzed and compared. The results show that multi-loop control of integrated units ensures asymptotic-stability compared to unstable single-loop control and the controller needs to take less effort in the case of the integrated unit compared to the individual units. The results suggest for implementation of integrated multi-loop control instead of controlling individual boiler units.

Suggested Citation

  • Chandrasekharan, Sreepradha & Panda, Rames C. & Swaminathan, Bhuvaneswari Natrajan & Panda, Atanu, 2018. "Operational control of an integrated drum boiler of a coal fired thermal power plant," Energy, Elsevier, vol. 159(C), pages 977-987.
    • Handle: RePEc:eee:energy:v:159:y:2018:i:c:p:977-987
    DOI: 10.1016/j.energy.2018.06.157
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    References listed on IDEAS

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    1. Sunil, P.U. & Barve, Jayesh & Nataraj, P.S.V., 2017. "Mathematical modeling, simulation and validation of a boiler drum: Some investigations," Energy, Elsevier, vol. 126(C), pages 312-325.
    2. Kong, Xiaobing & Liu, Xiangjie & Lee, Kwang Y., 2015. "Nonlinear multivariable hierarchical model predictive control for boiler-turbine system," Energy, Elsevier, vol. 93(P1), pages 309-322.
    3. Ponce, Carolina V. & Sáez, Doris & Bordons, Carlos & Núñez, Alfredo, 2016. "Dynamic simulator and model predictive control of an integrated solar combined cycle plant," Energy, Elsevier, vol. 109(C), pages 974-986.
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    Cited by:

    1. Wu, Zhenlong & Yuan, Jie & Liu, Yanhong & Li, Donghai & Chen, YangQuan, 2021. "An active disturbance rejection control design with actuator rate limit compensation for the ALSTOM gasifier benchmark problem," Energy, Elsevier, vol. 227(C).
    2. Kong, Biao & Wang, Enyuan & Lu, Wei & Li, Zenghua, 2019. "Application of electromagnetic radiation detection in high-temperature anomalous areas experiencing coalfield fires," Energy, Elsevier, vol. 189(C).
    3. Çetin, Gürcan & Özkaraca, Osman & Keçebaş, Ali, 2021. "Development of PID based control strategy in maximum exergy efficiency of a geothermal power plant," Renewable and Sustainable Energy Reviews, Elsevier, vol. 137(C).

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