Dynamic Matrix Control with Gas Calorific Value Feed-Forward Design for Blast Furnace Gas-Fired Combined-Cycle Gas Turbine

2022 4th International Conference on Electrical Engineering and Control Technologies (CEECT) Pub Date : 2022-12-01 DOI:10.1109/CEECT55960.2022.10030731

Xuan Zhang, Zihan Tang, Xiao Wu

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Abstract

Blast furnace gas-fired combined-cycle gas turbine (BFG-CCGT) is important in the steelmaking industry because it can convert the flue gas of blast furnace into electricity power in a highly efficient way. However, due to the large inertia, strong coupling and nonlinearity characteristics of CCGT, it has difficulties to achieve the ideal control effects. In addition, frequent fluctuations in the calorific value of BFG cause disturbances to the system, degrading the operating performance of the plant. It is thus urgent to develop advanced controllers to achieve flexible and reliable operation of the BFG-CCGT. For this reason, this paper develops a dynamic matrix control (DMC) with BFG calorific value feed-forward for the BFG-CCGT based on the understanding of system dynamic characteristics. Simulation results verify that the proposed DMC can effectively control the BFG-CCGT under variable working conditions and gas calorific value disturbances, providing fast and smooth tracking of the given set values.

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高炉燃气联合循环燃气轮机热值前馈设计的动态矩阵控制

高炉燃气联合循环燃气轮机(BFG-CCGT)可以将高炉烟气高效地转化为电能，在炼钢工业中具有重要意义。然而，由于CCGT的惯性大、耦合强、非线性等特点，难以达到理想的控制效果。此外，BFG热值的频繁波动会对系统造成干扰，降低装置的运行性能。因此，迫切需要开发先进的控制器来实现BFG-CCGT的灵活可靠运行。为此，本文在了解BFG- ccgt系统动态特性的基础上，开发了BFG热值前馈的动态矩阵控制(DMC)。仿真结果验证了所提出的DMC能够有效地控制变工况和气体热值干扰下的BFG-CCGT，对给定设定值进行快速平滑的跟踪。

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2022 4th International Conference on Electrical Engineering and Control Technologies (CEECT)

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