快速甩负荷功能在循环流化床机组的试验
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摘要
某电厂2×300 MW循环流化床、直接空冷机组,实施了在高负荷状态下的快速甩负荷至厂用电运行功能试验,并取得了成功,机组带厂用电"小岛"运行28 min。根据循环流化床蓄热量大的特性,试验过程中,锅炉动作切断主燃料、锅炉跳闸等保护程序,汽机动作转速超速保护、功率不平衡保护等功能,实现了机组快速甩负荷并成功抑制汽轮机转速升高,各项参数在机组要求范围之内,实现了机组快速甩负荷带厂用电运行的功能。快速甩负荷试验,提高了机组自动控制水平,增强了电厂应对突发事故的能力和机组持续发电的能力,为该类型机组实现快速甩负荷带厂用电运行提供借鉴经验。
A 2 × 300 MW circulating fluidized bed and a direct air-cooling unit in a power plant have been tested for rapid load-rejection from high-load to station service power load, and the test has achieved success. The unit ran for 28 minutes with auxiliary power load only. According to the characteristics of large heat storage in the circulating fluidized bed, during the test, the boiler was operated to cut off the main fuel, boiler trip protection and other protection procedures, and the steam turbine turned to overspeed protection, power imbalance protection and other functions, to achieve rapid load-rejection and successfully restrained the speed increase of steam turbine. All parameters were within the requirements of the unit, so that the rapid load-rejection of the unit with auxiliary power operation was successfully realized. The rapid load-rejection test improves the automatic control level of the unit, and it enhances the power plant's ability to cope with unexpected accidents and the continuous power generation ability. This test provides some reference for the unit to achieve rapid load-rejection with auxiliary power load only.
A 2 × 300 MW circulating fluidized bed and a direct air-cooling unit in a power plant have been tested for rapid load-rejection from high-load to station service power load, and the test has achieved success. The unit ran for 28 minutes with auxiliary power load only. According to the characteristics of large heat storage in the circulating fluidized bed, during the test, the boiler was operated to cut off the main fuel, boiler trip protection and other protection procedures, and the steam turbine turned to overspeed protection, power imbalance protection and other functions, to achieve rapid load-rejection and successfully restrained the speed increase of steam turbine. All parameters were within the requirements of the unit, so that the rapid load-rejection of the unit with auxiliary power operation was successfully realized. The rapid load-rejection test improves the automatic control level of the unit, and it enhances the power plant's ability to cope with unexpected accidents and the continuous power generation ability. This test provides some reference for the unit to achieve rapid load-rejection with auxiliary power load only.
引文
[1]广东电网公司电力科学研究院.火力发电建设工程机组甩负荷试验导则:DL/T 1270-2013[S].北京:中国电力出版社,2014:2.
[2]熊巍,张烈,王伟.两种典型机组的中压缸启动控制方式比较[J].热力发电,2010,39(2):5-9
[3]刘永刚,张长春,田正彬.循环流化床机组FCB功能的逻辑应用[J].山西电力,2012,2(4):41-44
[4]刘麒,刘麟.FCB功能相关的发变组保护逻辑改造[J].电力系统保护与控制,2011,39(4):146-154.
[5]董辉,罗凯,刘刚.125 MW燃煤机组FCB小岛试验锅炉参数控制[J].热力发电,2013,42(10):107-110,115.
[6]冯伟忠.900 MW超临界机组FCB试验[J].中国电力,2005,38(2):74-77
[7]戴光,周强民.河津电厂2×350 MW机组FCB性能试验分析[J].中国电力,2004,37(11):71-74.
[8]王学根,滕卫明,舒畅.通过控制系统改造实现国产600 MW超临界机组FCB功能[J].中国电力,2009,42(10):73-76.
[2]熊巍,张烈,王伟.两种典型机组的中压缸启动控制方式比较[J].热力发电,2010,39(2):5-9
[3]刘永刚,张长春,田正彬.循环流化床机组FCB功能的逻辑应用[J].山西电力,2012,2(4):41-44
[4]刘麒,刘麟.FCB功能相关的发变组保护逻辑改造[J].电力系统保护与控制,2011,39(4):146-154.
[5]董辉,罗凯,刘刚.125 MW燃煤机组FCB小岛试验锅炉参数控制[J].热力发电,2013,42(10):107-110,115.
[6]冯伟忠.900 MW超临界机组FCB试验[J].中国电力,2005,38(2):74-77
[7]戴光,周强民.河津电厂2×350 MW机组FCB性能试验分析[J].中国电力,2004,37(11):71-74.
[8]王学根,滕卫明,舒畅.通过控制系统改造实现国产600 MW超临界机组FCB功能[J].中国电力,2009,42(10):73-76.