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DeepThermal: Combustion Optimization for Thermal Power Generating Units Using Offline Reinforcement Learning
arXiv - CS - Systems and Control Pub Date : 2021-02-23 , DOI: arxiv-2102.11492 Xianyuan Zhan, Haoran Xu, Yue Zhang, Yusen Huo, Xiangyu Zhu, Honglei Yin, Yu Zheng
arXiv - CS - Systems and Control Pub Date : 2021-02-23 , DOI: arxiv-2102.11492 Xianyuan Zhan, Haoran Xu, Yue Zhang, Yusen Huo, Xiangyu Zhu, Honglei Yin, Yu Zheng
Thermal power generation plays a dominant role in the world's electricity
supply. It consumes large amounts of coal worldwide, and causes serious air
pollution. Optimizing the combustion efficiency of a thermal power generating
unit (TPGU) is a highly challenging and critical task in the energy industry.
We develop a new data-driven AI system, namely DeepThermal, to optimize the
combustion control strategy for TPGUs. At its core, is a new model-based
offline reinforcement learning (RL) framework, called MORE, which leverages
logged historical operational data of a TGPU to solve a highly complex
constrained Markov decision process problem via purely offline training. MORE
aims at simultaneously improving the long-term reward (increase combustion
efficiency and reduce pollutant emission) and controlling operational risks
(safety constraints satisfaction). In DeepThermal, we first learn a data-driven
combustion process simulator from the offline dataset. The RL agent of MORE is
then trained by combining real historical data as well as carefully filtered
and processed simulation data through a novel restrictive exploration scheme.
DeepThermal has been successfully deployed in four large coal-fired thermal
power plants in China. Real-world experiments show that DeepThermal effectively
improves the combustion efficiency of a TPGU. We also report and demonstrate
the superior performance of MORE by comparing with the state-of-the-art
algorithms on the standard offline RL benchmarks. To the best knowledge of the
authors, DeepThermal is the first AI application that has been used to solve
real-world complex mission-critical control tasks using the offline RL
approach.
更新日期:2021-02-24