600MW亚临界机组多蓄能协同调度的控制技术研究  

Research on Control Technology of Multi Storage Cooperative Dispatching of 600MW Subcritical Unit

作　　者：董珍柱 DONG Zhen-zhu(Shanxi Huaguang Electric Power Co.,Ltd.,Shuozhou 033314,China)

机构地区：[1]山西华光发电有限责任公司,山西朔州033314

出　　处：《电力学报》2021年第6期573-586,共14页Journal of Electric Power

基　　金：“2021年山西电力创新特等优秀成果”获奖项目成果。

摘　　要：随着新能源的快速发展和“两个细则”性能考核的实施,对电网调峰调频的要求越来越高,现阶段火电机组调节能力成为平抑新能源电力随机波动性的关键。在对锅炉、制粉、回热、冷端以及热网等系统蓄能的控制响应特性分析的基础上,开展了系统深入的理论研究与技术攻关,并在此基础上根据多蓄能协同调度控制关键技术,提出了一种火电机组多蓄能协同调度系统。该系统在综合考虑电网“两个细则”性能要求和机组运行稳定性要求的基础上,根据锅炉、制粉、回热、冷端以及热网等部分的蓄能状态和特性,开发了机炉协调优化、制粉送粉优化、凝结水节流、冷却工质节流、供热抽汽节流等蓄能控制子系统可进行分布式蓄能控制,并构建了适应各子系统蓄能响应特性的协同调度指令,可实现供热机组的多蓄能系统调度;此外,综合考虑了各子系统蓄能响应特性及安全边界,选择主汽压力、磨电流、除氧器水位、机组背压、热网供水温度等指标对火电机组各蓄能控制子系统的响应速率和响应能力进行在线评估,可为火电机组多种蓄能的协同调度提供评估支撑。所建系统在控制层面,可深入挖掘各系统蓄能潜力;在调度层面,通过各子系统蓄能协作,可提升火电机组的快速爬坡能力;在评估层面,可对系统的响应能力进行评估。以山西华光发电有限公司的两台600 MW亚临界汽包炉抽汽式发电机组(3^(#)、4^(#)机组)为工程应用对象,对所提的多蓄能协同调度控制系统进行分析。在实际应用过程中,由于该厂的两台机组未参与热网供热,因此应用所提控制方案时,仅采用锅炉蓄能、制粉系统蓄能、回热系统蓄能以及冷端系统蓄能来分析其提升机组爬坡速率的效果。经过某中调公司公布的一个月的AGC(Automatic Generation Control,AGC)性能指标和ACE考核收益统计可知,此两台机组�With the rapid development of new energy and the implementation of"Two Detailed Rules"perfor⁃mance assessment,the requirements for power grid peak shaving and frequency modulation are higher and high⁃er.At present,the regulation capacity of thermal power units has become the key to stabilize the random fluctua⁃tion of new energy power.Based on the analysis of the control response characteristics of energy storage systems such as boiler,pulverizing,regenerative,cold end and heat supply network,a systematic in-depth theoretical research and technical breakthrough were carried out.On this basis,according to the key technology of multi en⁃ergy storage cooperative dispatching control,a multi energy storage cooperative dispatching system for thermal power units was proposed.Based on the comprehensive consideration of the performance requirements of the"Two Detailed Rules"of the power grid and the operation stability requirements of the unit,and according to the energy storage status and characteristics of the boiler,pulverizing,regenerative,cold end and heat network,the system develops the coordinated optimization of the turbine and boiler,the optimization of pulverizing and powder feeding,condensate flow saving,cooling medium throttling,throttling of heating steam extraction,etc.energy storage control subsystems could carry out distributed energy storage control,and construct the coopera⁃tive dispatching command to adapt to the energy storage response characteristics of each subsystem,which could realize the multi energy storage system dispatching of heating units.In addition,considering the energy storage response characteristics and safety boundary of each subsystem,the main steam pressure,grinding cur⁃rent,deaerator water level,unit back pressure,heat supply network water supply temperature and other indica⁃tors were selected to evaluate the response rate and response capacity of each energy storage control subsystem of thermal power unit on-line,which could provide evaluation support for the cooperat

关 键 词：亚临界机组 多蓄能协同调度控制 制粉系统蓄能 锅炉系统蓄能 回热系统蓄能 热网系统蓄能 冷端系统蓄能 调节速率 回热调节 

分 类 号：TM621[电气工程—电力系统及自动化]