Abstract This paper proposes a coordinated control system (CCS) of a drum boiler unit considering energy demand decoupling. Since there is large delay and inertia in the response from the coal feed flow to the main steam pressure, the generalized predictive control (GPC) algorithm is adopted to design the CCS. As the coupling between the boiler and the turbine is serious, an energy demand signal is constructed and integrated into the GPC controller to realize decoupling control of the unit. Based on evaluation rules, a load command signal is reconstructed to improve the adaptability of the unit to the grid. Simulation results show that the CCS can track the load command rapidly, overcome the nonlinearity and backlash of governor valve, and ensure the safe and stable operation of the unit. Application results show that the CCS performs well during load up, load down, and load swing. The performance indicator exceeds 4.0 for one month, and its maximum value is up to 5.09. Simultaneously, the unit maintains a high degree of stability, the overshoot of coal feed flow is almost zero, the fluctuations of steam pressure and temperature are small. Obviously, the proposed CCS is advanced and practical.

中文翻译：

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考虑能源需求解耦的汽包锅炉机组协调控制系统研究

摘要 本文提出了一种考虑能源需求解耦的汽包锅炉机组协调控制系统（CCS）。由于给煤流量对主蒸汽压力的响应存在较大的延迟和惯性，因此采用广义预测控制（GPC）算法设计CCS。由于锅炉与汽轮机耦合严重，构建能量需求信号并集成到GPC控制器中，实现机组的解耦控制。根据评估规则，重构负荷指令信号，提高机组对电网的适应性。仿真结果表明，CCS能够快速跟踪负荷指令，克服调速阀的非线性和背隙，保证机组安全稳定运行。应用结果表明，CCS在负载上升、负载下降和负载摆动过程中表现良好。1个月绩效指标超过4.0，最高可达5.09。同时机组保持高度稳定，给煤流量超调几乎为零，蒸汽压力和温度波动小。显然，所提出的 CCS 是先进和实用的。