Existing swirling combustion technology,which relies on faulty coal,is unable to meet deep peak shaving demands without auxiliary methods.This paper developed a deep peak regulation burner(DPRB)to achieve stable combu...Existing swirling combustion technology,which relies on faulty coal,is unable to meet deep peak shaving demands without auxiliary methods.This paper developed a deep peak regulation burner(DPRB)to achieve stable combustion at 15%–30%of the boiler’s rated load without auxiliary support.Gas-particle tests,industrial trials,and transient numerical simulations were conducted to evaluate the burner’s performance.At full rated load,the DPRB formed a central recirculation zone(RZ)with a length of 1.5d and a diameter of 0.58d(where d represents the outlet diameter).At 40%,20%,and 15%rated loads,the RZ became annular,with diameters of 0.30d,0.40d,and 0.39d,respectively,with a length of 1.0d.At 20%and 15%rated loads,the recirculation peak and the range of particle volume flux were comparable to those at 40%rated load.The prototype burner demonstrated that,without oil support,the gas temperature within 0 to 1.8 m from the primary air outlet remained below 609℃,insufficient to ignite faulty coal.As the load rate increased from 20%to 30%,the prototype’s central region temperature remained low,with a maximum of 750℃between 0 and 2.0 m.In contrast,the DPRB’s central region temperature reached 750℃at around 0.65–0.70 m.At a 3%·min^(−1)load-up rate,when the load increased from 20%to 30%,the prototype burner extinguished after 30 s.However,the DPRB maintained stable combustion throughout the process.展开更多
智能配电网的发展提升电网的自愈能力和恢复速度,然而,当系统遭遇大范围停电事故时,其恢复过程颇为复杂。因此,针对受损配电网供电中断问题,提出一种计及冷负荷效应的受损配电网两阶段恢复策略,用以生成含开关控制动作的配电网供电恢复...智能配电网的发展提升电网的自愈能力和恢复速度,然而,当系统遭遇大范围停电事故时,其恢复过程颇为复杂。因此,针对受损配电网供电中断问题,提出一种计及冷负荷效应的受损配电网两阶段恢复策略,用以生成含开关控制动作的配电网供电恢复策略。先生成支持馈线重配的传统恢复和分布式电源辅助的孤岛供电恢复计划。然后,生成最优开关切换操作序列,将其转化为混合整数线性规划(mix integer linear programming,MILP)问题,使受损配电网快速恢复到最终配置。最后,使用多馈线1069节点电力系统中模拟单线与多线故障时的配电网恢复策略。研究结果表明,所提策略能有效生成开关切换动作序列,合理利用所有资源快速恢复配电网,提高受损配电网的恢复速度与容量。展开更多
基金supported by the Heilongjiang Touyan Innovation Team Program and the National Key Research and Development Program,China(No.2024YFB4104803).
文摘Existing swirling combustion technology,which relies on faulty coal,is unable to meet deep peak shaving demands without auxiliary methods.This paper developed a deep peak regulation burner(DPRB)to achieve stable combustion at 15%–30%of the boiler’s rated load without auxiliary support.Gas-particle tests,industrial trials,and transient numerical simulations were conducted to evaluate the burner’s performance.At full rated load,the DPRB formed a central recirculation zone(RZ)with a length of 1.5d and a diameter of 0.58d(where d represents the outlet diameter).At 40%,20%,and 15%rated loads,the RZ became annular,with diameters of 0.30d,0.40d,and 0.39d,respectively,with a length of 1.0d.At 20%and 15%rated loads,the recirculation peak and the range of particle volume flux were comparable to those at 40%rated load.The prototype burner demonstrated that,without oil support,the gas temperature within 0 to 1.8 m from the primary air outlet remained below 609℃,insufficient to ignite faulty coal.As the load rate increased from 20%to 30%,the prototype’s central region temperature remained low,with a maximum of 750℃between 0 and 2.0 m.In contrast,the DPRB’s central region temperature reached 750℃at around 0.65–0.70 m.At a 3%·min^(−1)load-up rate,when the load increased from 20%to 30%,the prototype burner extinguished after 30 s.However,the DPRB maintained stable combustion throughout the process.
文摘智能配电网的发展提升电网的自愈能力和恢复速度,然而,当系统遭遇大范围停电事故时,其恢复过程颇为复杂。因此,针对受损配电网供电中断问题,提出一种计及冷负荷效应的受损配电网两阶段恢复策略,用以生成含开关控制动作的配电网供电恢复策略。先生成支持馈线重配的传统恢复和分布式电源辅助的孤岛供电恢复计划。然后,生成最优开关切换操作序列,将其转化为混合整数线性规划(mix integer linear programming,MILP)问题,使受损配电网快速恢复到最终配置。最后,使用多馈线1069节点电力系统中模拟单线与多线故障时的配电网恢复策略。研究结果表明,所提策略能有效生成开关切换动作序列,合理利用所有资源快速恢复配电网,提高受损配电网的恢复速度与容量。
