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煤电机组运行灵活性提升技术研究与应用

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[目的]在"双碳"战略目标背景下,新能源发电大比例接入电网后电力系统对灵活性调节资源的需求大幅增加,现阶段煤电是具备规模化提升调峰能力的电源侧的主要灵活性资源.自2016年以来,国内主要发电企业已实施一定规模的煤电机组灵活性改造,因此,有必要对灵活性改造后机组实际运行和检修中存在的问题进行总结分析.[方法]对某公司多台煤电机组实施灵活性改造的技术路线、投资费用、实际运行情况等进行统计分析.[结果]现役煤电机组灵活性提升改造后,先进机组最小发电出力可降至18%Pe(Pe为额定负荷)水平;在20%Pe~30%Pe时,变负荷速率可达1.8%Pe/min;平均单位容量投资101元/kW.此外,在灵活运行工况下,改造后的煤电机组发电煤耗大幅升高.[结论]针对煤电机组灵活工况下的运行、检修以及未来进一步工作提出了建议,研究结果为现役煤电机组灵活性提升改造提供参考和借鉴.
Research and Application of Operation Flexibility Improvement Technology for Coal-Fired Power Unit
[Objectives]Under the background of the"dual carbon"strategic goal,the demand for flexible regulation resources in the power system has significantly increased after the large-scale integration of new energy generation into the grid.At present,the coal-fired power is the main flexible resource on the power side with the ability to scale up peak shaving.Since 2016,the major domestic power generation companies have implemented a certain scale of flexibility transformation of coal-fired power units.Therefore,it is necessary to summarize and analyze the problems existing in the actual operation and maintenance of the unit after flexibility transformation.[Methods]The technical route,investment cost and actual operation of several coal-fired power units with flexible transformation in a company were statistically analyzed.[Results]After the flexibility improvement and transformation of the active coal-fired power generation unit,the minimum power generation output of the advanced unit can be reduced to 18%Pe(Pe is rated load)level,the load change rate with 20%Pe~30%Pe can reach 1.8%Pe/min,and an average unit capacity investment is 101 yuan/kW.In addition,under flexible operating conditions,the coal consumption of coal-fired power units after the transformation has significantly increased.[Conclusions]Suggestions are put forward for the operation,maintenance and further work of coal-fired power units under flexible operating conditions.The research results provide reference and inspiration for the flexibility improvement and transformation of existing coal-fired power units.

dual carboncoal-fired power unitlow loaddeep peak regulationflexibility transformationtechnical routeinvestmentmaintenance suggestions

严新荣、胡志勇、张鹏威、郑成航、向军、唐郭安、刘金亮、郭剑雄、黄一博、于鹏峰、高翔

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浙江大学能源工程学院,浙江省 杭州市 310007

华电电力科学研究院有限公司,浙江省 杭州市 310030

煤燃烧与低碳利用全国重点实验室(华中科技大学),湖北省 武汉市 430074

双碳 煤电机组 低负荷 深度调峰 灵活性改造 技术路线 投资 检修建议

2024

发电技术
华电电力科学研究院

发电技术

CSTPCD
影响因子:0.388
ISSN:2096-4528
年,卷(期):2024.45(6)