Multipe NSSS (Nuclear Steam Supply System) modules use the common feeding-water system to drive the common turbine power generation set. The SSFFN (secondary side fluid flow network) of MHTGR plant has features i.e. s...Multipe NSSS (Nuclear Steam Supply System) modules use the common feeding-water system to drive the common turbine power generation set. The SSFFN (secondary side fluid flow network) of MHTGR plant has features i.e. strong-coupling and nonlinearity. A wide range of power switching operation will cause unsteady flow, which may destroy the working elements and will be a threat for normal operation. To overcome those problems, a differential-algebraic model and PI controllers are designed for the SSFFN. In MATLAB\SIMULINK environment, a simulation platform is established and used to make a simulation of SSFFN of a MHTGR plant with two NSSS modules, which uses feedwater valves to control the mass flow rate in each module instead of feedwater pump. Results reflect good robustness of controllers.展开更多
为充分发挥各类分布式资源的特点和配电网的可调节能力,以提供性能更优的动态辅助服务,文中提出一种面向配电网格虚拟电厂(meshed distribution virtual power plant,MVPP)的动态频率聚合控制方法。首先,明确MVPP的整体架构,建立针对一...为充分发挥各类分布式资源的特点和配电网的可调节能力,以提供性能更优的动态辅助服务,文中提出一种面向配电网格虚拟电厂(meshed distribution virtual power plant,MVPP)的动态频率聚合控制方法。首先,明确MVPP的整体架构,建立针对一次调频场景、能够聚合其内部各类分布式资源动态特性的频率控制模型。然后,采用基于自适应动态频率匹配的控制方法解决动态频率聚合模型控制设计问题,通过在线自适应方法分解期望特性,并利用H∞最优鲁棒控制方法为各设备设计本地反馈控制器,精确动态匹配分解一次调频的期望特性。仿真结果验证了所提控制方法的有效性,该方法能在负载扰动、新能源出力波动等场景下,通过各资源互补显著改善系统一次调频特性。所提策略可为空间分布的聚合单元参与动态调频辅助服务提供新的解决思路。展开更多
火电厂分布式控制系统(Distributed Control System,DCS)在机组控制与安全运行中依赖稳定的通信网络,而通信延迟易引发控制响应滞后与数据异常,影响运行可靠性。通过分析通信延迟问题,提出网络设备升级、系统配置优化及环境防干扰等解...火电厂分布式控制系统(Distributed Control System,DCS)在机组控制与安全运行中依赖稳定的通信网络,而通信延迟易引发控制响应滞后与数据异常,影响运行可靠性。通过分析通信延迟问题,提出网络设备升级、系统配置优化及环境防干扰等解决方案,并验证其实施效果,提出一系列优化策略。研究为提升火电厂DCS系统通信实时性与稳定性提供了工程参考与应用价值。展开更多
文摘Multipe NSSS (Nuclear Steam Supply System) modules use the common feeding-water system to drive the common turbine power generation set. The SSFFN (secondary side fluid flow network) of MHTGR plant has features i.e. strong-coupling and nonlinearity. A wide range of power switching operation will cause unsteady flow, which may destroy the working elements and will be a threat for normal operation. To overcome those problems, a differential-algebraic model and PI controllers are designed for the SSFFN. In MATLAB\SIMULINK environment, a simulation platform is established and used to make a simulation of SSFFN of a MHTGR plant with two NSSS modules, which uses feedwater valves to control the mass flow rate in each module instead of feedwater pump. Results reflect good robustness of controllers.
文摘为充分发挥各类分布式资源的特点和配电网的可调节能力,以提供性能更优的动态辅助服务,文中提出一种面向配电网格虚拟电厂(meshed distribution virtual power plant,MVPP)的动态频率聚合控制方法。首先,明确MVPP的整体架构,建立针对一次调频场景、能够聚合其内部各类分布式资源动态特性的频率控制模型。然后,采用基于自适应动态频率匹配的控制方法解决动态频率聚合模型控制设计问题,通过在线自适应方法分解期望特性,并利用H∞最优鲁棒控制方法为各设备设计本地反馈控制器,精确动态匹配分解一次调频的期望特性。仿真结果验证了所提控制方法的有效性,该方法能在负载扰动、新能源出力波动等场景下,通过各资源互补显著改善系统一次调频特性。所提策略可为空间分布的聚合单元参与动态调频辅助服务提供新的解决思路。
文摘火电厂分布式控制系统(Distributed Control System,DCS)在机组控制与安全运行中依赖稳定的通信网络,而通信延迟易引发控制响应滞后与数据异常,影响运行可靠性。通过分析通信延迟问题,提出网络设备升级、系统配置优化及环境防干扰等解决方案,并验证其实施效果,提出一系列优化策略。研究为提升火电厂DCS系统通信实时性与稳定性提供了工程参考与应用价值。
