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首页> 外文期刊>Thermal engineering >Implementation of the Automatics for Switching the Combined-Cycle Plant of Power-Generating Unit No. 5 at Hrazdan Thermal Power Plant to the Steam Power Plant and Gas Turbine Modes
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Implementation of the Automatics for Switching the Combined-Cycle Plant of Power-Generating Unit No. 5 at Hrazdan Thermal Power Plant to the Steam Power Plant and Gas Turbine Modes

机译：将哈兹丹热电厂5号机组联合循环电厂切换为蒸汽电厂和燃气轮机模式的自动装置的实施

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The article describes an automated technology put into practice for switching power-generating unit no. 5 at Hrazdan Thermal Power Plant from the combined-cycle plant (CCP) mode to the steam power plant or gas-turbine unit (SPP and GTU, respectively) modes upon an emergency shutdown of the gas or steam turbine. The layout of the power unit based on the waste-gas heat utilization scheme enables the thermal power plant to operate with a partial mix of the equipment, viz., without the gas turbine or steam turbine. However, the initial project did not provide for changing the operational mode without the total shutdown of the power unit. During a sudden shutdown, the considerable unit output of the power unit results in considerable disturbances in the entire electric power system of the Republic of Armenia. The maintenance of a partial capacity of the power unit under emergency shutdown of the equipment reduces unwanted consequences for both the power plant and the electric power system as a whole. A great scope of urgent switching operations and changes in the automatic regulator settings upon sudden shutdown of the gas or steam turbine makes successful actions of the operator under the manual changeover from the CPP mode to the SPP or GTU modes unlikely. Such a changeover can be performed only by the automatics with the operator performing fine correction of the mode upon completion of first-priority switching operations if necessary. The appropriate algorithms for automatic change of the mode when shutting down the gas or steam turbine were implemented in the Automated Process Control System (APCS) of the power unit. In the article, the basic scope and the sequence of actions performed by the automatic devices upon shutting down the gas or steam turbine, as well as the principles of automatic adjustment of the circuits for automated control of the fuel-to-water and fuel-to-air ratios and the temperature conditions of the boiler, are set forth. The article also provides the results of full-scale tests and an example of the behavior of the basic parameters upon shutting down the gas turbine and switching the power unit over to the SPP mode.
机译：本文介绍了一种用于开关No.2发电单元的自动化技术。在Hrazdan热电厂从燃气联合循环机组（CCP）模式切换到蒸汽发电厂或燃气轮机单元（分别为SPP和GTU）模式时，将在燃气轮机或蒸汽轮机紧急关闭时从5切换到5。基于废气热利用方案的动力单元布局可使火力发电厂在不使用燃气轮机或蒸汽轮机的情况下，在部分混合设备的情况下运行。但是，最初的项目没有规定在没有完全关闭电源的情况下更改操作模式。在突然停机期间，功率单元的大量单元输出会导致亚美尼亚共和国整个电力系统受到严重干扰。在设备紧急关闭时维护动力单元的部分容量可减少对发电厂和整个电力系统的不良后果。在燃气轮机或蒸汽轮机突然关闭时，大范围的紧急开关操作和自动调节器设置的更改使得操作员在从CPP模式手动转换为SPP或GTU模式的成功操作下不可能成功地采取行动。仅当操作员在必要时完成第一优先切换操作时对模式进行精细校正时，才可以通过自动操作来执行这种转换。在动力单元的自动过程控制系统（APCS）中实施了用于在关闭燃气轮机或蒸汽轮机时自动改变模式的适当算法。在这篇文章中，自动装置在关闭燃气轮机或蒸汽轮机时执行的基本范围和动作顺序，以及自动调节燃油至水和燃油的自动控制回路的原理列出了空气比和锅炉的温度条件。本文还提供了全面测试的结果以及关闭燃气轮机并将功率单元切换到SPP模式时基本参数的行为示例。

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