提升直流炉供热机组灵活性的电热协调控制策略  

Electricity-heat Coordinated Control Strategy for Improving the Flexibility of a Once-through CHP Unit

作　　者：王玮 申朋玉 李雪寒 张光明 曾德良 刘吉臻 WANG Wei;SHEN Pengyu;LI Xuehan;ZHANG Guangming;ZENG Deliang;LIU Jizhen(State Key Laboratory of Alternate Electric Power System with Renewable Energy Source(North China Electric Power University),Changping District,Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206

出　　处：《中国电机工程学报》2023年第6期2100-2108,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52076073)。

摘　　要：为克服“以热定电”对直流炉供热机组变负荷性能的影响,该文引入并改进双重控制方法,从而实现电热的协调控制。基于运行数据,辨识获得热–电负荷转换的动态模型,建立直流炉供热机组电热协调控制模型;重构热负荷偏差积分信号,实现对热负荷能量的全程检测;设计电热协调的双重控制策略,一方面通过供热抽汽流量主动响应提升发电负荷响应速率,另一方面通过热负荷精准能量平衡实现热负荷的全程自主恢复。仿真结果表明:电热协调双重控制策略可使机组的变负荷速率达到额定负荷的3%/min,自动发电控制(automatic generation control,AGC)调节性能至少提升了一倍,并能维持热负荷等主要参数的稳定。所提控制策略实现了直流炉供热机组的电热协调控制,可显著提升机组的运行灵活性。To overcome the influence of“heat-led mode”on the combined heat and power(CHP)unit with a once-though boiler(OTB),the dual control method is introduced and improved to develop a coordinated control strategy for electricity and heat coordination.Based on the identification of operation data,the dynamic model for heat-electricity conversion is established;then the coordinated model for the OTB-CHP unit is developed.The integral signal of thermal load deviation is reconstructed to realize the real-time detection of thermal load.The dual control strategy is proposed to improve the load change speed by use of heat extraction active response,and to recover the heat load by use of accurate energy balance.The simulating results reveal that with the proposed strategy the load change speed can reach 3%of its rated power in per minute,the automatic generation control(AGC)performance index can be doubled,and the key parameters such as heat load can be kept stable.The proposed control strategy realizes the coordinated control of once-through CHP units and significantly improves the unit operating flexibility.

关 键 词：直流炉 供热机组 电热协调 双重控制 变负荷 灵活性 

分 类 号：TK32[动力工程及工程热物理—热能工程]