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首页> 外文期刊>Thermal engineering >Study of Regeneration System of 300 MW Power Unit Based on Nondeaerating Heat Balance Diagram at Reduced Load
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Study of Regeneration System of 300 MW Power Unit Based on Nondeaerating Heat Balance Diagram at Reduced Load

机译：基于减负荷非脱气热平衡图的300 MW机组再生系统研究

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摘要

More than 30 power units of thermal power stations, based on the nondeaerating heat balance diagram, successfully operate in the former Soviet Union. Most of them are power units with a power of 300 MW, equipped with HTGZ and LMZ turbines. They operate according to a variable electric load curve characterized by deep reductions when undergoing night minimums. Additional extension of the range of power unit adjustment makes it possible to maintain the dispatch load curve and obtain profit for the electric power plant. The objective of this research is to carry out estimated and experimental processing of the operating regimes of the regeneration system of steam-turbine plants within the extended adjustment range and under the conditions when the constraints on the regeneration system and its equipment are removed. Constraints concerning the heat balance diagram that reduce the power unit efficiency when extending the adjustment range have been considered. Test results are presented for the nondeaerating heat balance diagram with the HTGZ turbine. Turbine pump and feed electric pump operation was studied at a power unit load of 120-300 MW. The reliability of feed pump operation is confirmed by a stable vibratory condition and the absence of cavi-tation noise and vibration at a frequency that characterizes the cavitation condition, as well as by oil temperature maintenance after bearings within normal limits. Cavitation performance of pumps in the studied range of their operation has been determined. Technical solutions are proposed on providing a profitable and stable operation of regeneration systems when extending the range of adjustment of power unit load. A nondeaerating diagram of high-pressure preheater (HPP) condensate discharge to the mixer. A regeneration system has been developed and studied on the operating power unit fitted with a deaeratorless thermal circuit of the system for removing the high-pressure preheater heating steam condensate to the mixer, with extending the range of load adjustment for the 300 MW power unit load.
机译：根据非脱气热平衡图，超过30个火力发电厂的动力装置在前苏联成功运行。其中大多数是功率为300 MW的动力装置，配备了HTGZ和LMZ涡轮机。它们根据可变的电力负载曲线运行，该曲线的特征在于当经历夜间最低温度时会大幅降低。功率单元调整范围的进一步扩展使维护调度负荷曲线并为发电厂获得利润成为可能。这项研究的目的是在扩大的调节范围内以及在消除对再生系统及其设备的限制的条件下，对汽轮机再生系统的运行方式进行估计和实验处理。已经考虑了有关热平衡图的约束，这些约束会在扩展调整范围时降低功率单元的效率。给出了HTGZ涡轮机非脱气热平衡图的测试结果。研究了涡轮泵和给水电动泵在120-300 MW机组负荷下的运行情况。进料泵运行的可靠性是通过稳定的振动条件，没有汽蚀噪声和以气蚀条件为特征的频率振动以及轴承在正常范围内后的油温维持来证实的。确定了泵在研究的运行范围内的气蚀性能。提出了在扩展功率单元负载的调节范围时提供再生系统的有利和稳定运行的技术解决方案。高压预热器（HPP）冷凝水排放到混合器的非​​排气图。已开发了一种再生系统，并在运行动力装置上进行了研究，该装置配备了该系统的无气化器热回路，用于将高压预热器加热的蒸汽冷凝水排出至混合器，从而扩展了300 MW动力装置负荷的负荷调节范围。

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