适应火电机组灵活运行的滑压曲线优化方法  

Sliding Pressure Curve Optimization for Flexible Operation of Thermal Power Units

作　　者：董竹林 牛玉广[1,2] 董恩伏 周桂平 罗桓桓 张国斌[4] DONG Zhulin;NIU Yuguang;DONG Enfu;ZHOU Guiping;LUO Huanhuan;ZHANG Guobin(School of Control and Computer Engineering,North China Electric Power University,Beijing 102206,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,Beijing 102206,China;State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110004,China;Inner Mongolia Electric Power Research Institute,Hohhot 010020,China)

机构地区：[1]华北电力大学控制与计算机工程学院,北京102206 [2]华北电力大学新能源电力系统国家重点实验室,北京102206 [3]国网辽宁省电力有限公司,沈阳110004 [4]内蒙古电力科学研究院,呼和浩特010020

出　　处：《动力工程学报》2020年第3期248-256,共9页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2017YFB0902100);内蒙古电力(集团)有限责任公司科技资助项目(2018-71)

摘　　要：为了保证机组在调峰过程中快速响应负荷指令以及减小主蒸汽压力的波动,分析了汽轮机初压变化对机组安全性、稳定性、经济性和快速性的影响以及不同负荷段对上述特性的需求,结合最小二乘支持向量机(LSSVM)和混沌粒子群优化(CPSO)算法建立了热耗率预测模型并确定660 MW机组各典型负荷下的最优初压。提出了将性能试验优化曲线与文章优化曲线相结合的新的滑压策略,即机组在动态调节时采用文章优化曲线运行,而在稳定工况下采用性能试验优化曲线运行,并将该滑压策略添加到协调控制系统的主蒸汽压力设定值生成回路中进行仿真验证。结果表明:新的滑压策略不仅能提高机组在动态调节时的变负荷速率,还能维持机组在稳态工况时的经济性。To ensure the quick response to load commands during peak shaving of a unit and to reduce the pressure fluctuation of the main steam,the effects of initial pressure changes on the safety,stability,economy and response speed of the unit were analyzed,including the requirements on above characteristics in different load ranges.A heat rate prediction model was established based on least squares support vector machine(LSSVM)combined with chaotic particle swarm optimization(CPSO)algorithm to determine the optimal initial pressure for each typical load of a 660 MW unit.In addition,a new sliding pressure strategy was proposed by combining the performance test optimization curve with the article optimization curve,i.e.,adopting the article optimization curve in dynamic regulation period,and then switching to the performance test optimization curve in stable operation condition.For simulation and verification purposes,the new sliding pressure strategy was subsequently added to the coordinated control system to generate pressure setting values of the main steam.Results show that the new sliding pressure strategy could not only improve the response speed of load variation in dynamic regulation,but also maintain the economy of the unit in stable operation condition.

关 键 词：热耗率 预测模型 最优初压 快速变负荷 经济性 主蒸汽压力波动 

分 类 号：TM621[电气工程—电力系统及自动化]