摘要
为进一步提高火电企业灵活性调峰力度,最大限度实现热电解耦,有效解决东北区域用电用热矛盾,针对东北地区某热电厂,采用Ebsilon软件建立了基于高低压旁路供热技术、低压缸切除供热技术、高低压旁路供热+抽汽供热技术、高低压旁路供热+低压缸切除技术等多种灵活性调峰模式的热力系统模型,计算分析了多种调峰模式对机组性能、供热能力和调峰能力的影响,提出了最优深度调峰方案。结果表明:综合考虑机组能耗、调峰能力、供热能力等因素,高低压旁路+低压缸切缸的调峰模式为最优调峰方案。与其他调峰方案相比,该方案可大幅提高机组供热能力和调峰能力;在机组主蒸汽流量相同的条件下,机组40%负荷运行时,高低压旁路+低压缸切缸工况下机组供热能力比抽汽工况增加了124.4 MW;在机组供热能力相同的条件下,高低压旁路+低压缸切缸工况下机组发电功率比抽汽工况平均降低140 MW,比低压缸切缸工况平均降低96 MW,最大限度地实现热电解耦,提高了机组参与辅助服务的调峰收益。
In order to further improve the flexibility and peak regulation of thermal power enterprises,realize thermal-electrolytic coupling to the maximum extent,and effectively solve the contradiction between electricity and heat consumption in northeast China.According to a thermal power plant in northeast China,Ebsilon software is used to establish a thermal system model based on various flexible peak shaving modes,such as high and low pressure bypass heating technology,low pressure cylinder removal heating technology,high and low pressure bypass heating+extraction heating technology,high and low pressure bypass heating and low pressure cylinder removal technology,etc.The influences of various peak shaving modes on unit performance,heating capacity and peak shaving capacity are calculated and analyzed,and the optimal deep peak shaving scheme is proposed.The analysis shows that the peak-shaving mode of high and low pressure bypass and low pressure cylinder cutting is the optimal peak-shaving scheme considering the factors such as unit energy consumption,peak-shaving capacity and heating capacity.Compared with other peak shaving schemes,this scheme can greatly improve the unit’s heating capacity and peak shaving capacity.Under the condition that the main steam flow rate of the unit is the same,when the unit is running at 40% load,the heat supply capacity of the unit under the conditions of high and low pressure bypass and low pressure cylinder cutting is 124.4 MW higher than that under the condition of steam extraction.Under the condition of the same heat supply capacity of the units,the generating power of the units under the conditions of high and low pressure bypass and low pressure cylinder cut-off is reduced by 140 MW on average compared with that under the condition of steam extraction and 96 MW on average compared with that under the condition of low pressure cylinder cut-off,thus realizing thermal-electrolytic coupling to the maximum extent and improving the peak shaving income of the units participating in auxiliary services.
作者
陈晓利
高继录
郑飞
张敏
CHEN Xiao-li;GAO Ji-lu;ZHENG Fei;ZHNAG Min(CPI Northeast Energy Technology Co.Ltd.,Shenyang,China,Post Code:110179;SP1C Northeast Electric Power Co.Ltd,Shenyang,China,Post Code:110181)
出处
《热能动力工程》
CAS
CSCD
北大核心
2020年第12期26-30,共5页
Journal of Engineering for Thermal Energy and Power
基金
国家电力投资集团公司科技项目(2019-011-KJ-DBGS)。
关键词
火电机组
深度调峰
高低压旁路
低压缸切缸
Thermal power units
Deep peak shaving
High and low pressure bypass
Low pressure cylinder cutting cylinder
