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Technical Features of the GT26 Gas Turbine to improve the Flexibility of the Combined Cycle System KA26

机译：GT26燃气轮机的技术特点，提高了循环系统的灵活性Ka26

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The flexibility of gas turbine and combined cycle power plants is a key requirement for today's power markets, which means more than just high rates of power change and faster start-ups also operation at part- and low-load. High part-load efficiency across a wide ambient conditions range is also required in many markets today. Alstom with its GT26 (50 Hz) / GT24 (60 Hz) and the associated combined cycle power plants (KA26/KA24) offers these operational flexibility features as well as flexible operating modes, which provides the plant operators with the ability to choose either to run the plant in performance optimized mode (with highest power and efficiency) or, if able to accept a small performance reduction, to extend the service interval by up to 30%. With the KA26/KA24 'Low Load Operation Capability' feature the plant can be kept fully online at around 20% CCPP load or possibly lower, offering an alternative to either running at higher minimum load points or performing a stop/start cycle, and in-turn offer full on-line spinning reserve with the capability to ramp back up very quickly when needed. Within this paper some of the key technical aspects of the GT26/GT24 is explained, which contribute to these flexibility improvements. It is explained how Inlet Cooling and High Fogging can be used to off-set the performance drop-off at high ambient temperatures, how an air pre-heater can be used to improve base load and part load efficiency and what effect the choice of the flexible operation modes have on performance and service intervals.
机译：燃气轮机和联合循环发电厂的灵活性是当今电力市场的关键要求，这意味着不仅仅是高功率变化率，更快的启动也在部分和低负载下运行。今天的许多市场也需要跨越环境条件范围的高级负荷效率。具有其GT26（50 Hz）/ GT24（60 Hz）和相关联的循环发电厂（KA26 / KA24）的Alstom提供了这些操作柔性功能以及柔性操作模式，为工厂运营商提供了选择的能力在性能优化模式下运行植物（具有最高功率和效率），或者如果能够接受小的性能降低，将服务间隔延长至多30％。随着KA26 / KA24'低负载操作能力'功能，工厂可以在大约20％CCPP负载或可能更低的情况下完全在线保持在线，提供替代方案，以便在更高的最小负载点或执行停止/开始周期， - 在需要时提供完整的在线纺纱储备，在需要时延长速度速度。在本文中，解释了GT26 / GT24的一些关键技术方面，这有助于这些灵活性改进。有人说明了入口冷却和高雾化如何在高环境温度下卸下性能下降，如何使用空气预热器如何改善基本负荷和部分负载效率以及效果选择灵活的操作模式具有性能和服务间隔。

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