In order to get a globally optimized solution for the Elevator Group Control System (EGCS) scheduling problem, an algorithm with an overall optimization function is needed. In this study, Real-time Particle Swarm Opti...In order to get a globally optimized solution for the Elevator Group Control System (EGCS) scheduling problem, an algorithm with an overall optimization function is needed. In this study, Real-time Particle Swarm Optimization (RPSO) is proposed to find an optimal solution to the EGCS scheduling problem. Different traffic patterns and controller mechanisms for EGCS are analyzed. This study focuses on up-peak traffic because of its critical importance to modern office buildings. Simulation results show that EGCS based on Multi-Agent Systems (MAS) using RPSO gives good results for up-peak EGCS scheduling problem. Besides, the elevator real-time scheduling and reallocation functions are realized based on RPSO in case new information is available or the elevator becomes busy because it is unavailable or full. This study contributes a new scheduling algorithm for EGCS, and expands the application of PSO.展开更多
随着矿业现代化的推进,矿用不间断电源(Uninterruptible Power Supply,UPS)系统的重要性日益凸显。5G通信的应用为矿用UPS系统的智能化和远程控制提供新的可能性。文章探讨基于5G通信的矿用UPS控制系统设计,包括系统架构设计、功能实现...随着矿业现代化的推进,矿用不间断电源(Uninterruptible Power Supply,UPS)系统的重要性日益凸显。5G通信的应用为矿用UPS系统的智能化和远程控制提供新的可能性。文章探讨基于5G通信的矿用UPS控制系统设计,包括系统架构设计、功能实现及其在矿业应用中的效果。展开更多
针对现有方法控制不间断电源(Uninterrupted Power Supply,UPS)时电源运行稳定性差的问题,开展高频模块化UPS并联控制技术研究。首先建立高频模块化UPS并联运行等效电路,其次设计UPS滑模变结构控制策略,最后将比例-积分-微分(Proportion...针对现有方法控制不间断电源(Uninterrupted Power Supply,UPS)时电源运行稳定性差的问题,开展高频模块化UPS并联控制技术研究。首先建立高频模块化UPS并联运行等效电路,其次设计UPS滑模变结构控制策略,最后将比例-积分-微分(Proportional Integral Derivative,PID)控制与UPS滑模变结构控制相融合,提出一种控制技术。实例应用证明,所提技术可以显著提升电源运行动态性和稳定性,具有较大的应用价值。展开更多
为解决电力系统中不间断电源(Uninterruptible Power Supply,UPS)调度的自动化问题,提出一种基于分布式控制的UPS调度自动化算法。在深入分析电能需求的特性和系统可靠性要求的基础上,设计分布式控制架构,并选择适用于UPS调度的分布式算...为解决电力系统中不间断电源(Uninterruptible Power Supply,UPS)调度的自动化问题,提出一种基于分布式控制的UPS调度自动化算法。在深入分析电能需求的特性和系统可靠性要求的基础上,设计分布式控制架构,并选择适用于UPS调度的分布式算法,主要包括负载预测与动态调整、分布式能量管理和故障容忍性设计,并通过全面的性能评估,验证算法的可靠性和健壮性。所提算法为UPS调度自动化提供一套全面、可靠的解决方案,有望推动电力系统智能化和效率提升。展开更多
不间断电源(Uninterruptible Power Supply,UPS)系统是广电播控机房中至关重要的设备之一,其性能稳定性直接影响播控机房的正常运行。深入研究UPS系统的概述、配置方法、设备选型与配置以及性能评估等方面,为广电播控机房UPS的合理配置...不间断电源(Uninterruptible Power Supply,UPS)系统是广电播控机房中至关重要的设备之一,其性能稳定性直接影响播控机房的正常运行。深入研究UPS系统的概述、配置方法、设备选型与配置以及性能评估等方面,为广电播控机房UPS的合理配置提供理论支持和实践指导,同时为UPS系统的运行与管理提供重要参考。展开更多
随着电力需求的不断增长,传统不间断电源(Uninterruptible Power Supply,UPS)系统在电力调度自动化中的应用面临新挑战。文章分析了UPS系统的概念与分类,重点讨论UPS系统在实时电压调节、频率控制以及负载平衡中的应用及其优化策略。采...随着电力需求的不断增长,传统不间断电源(Uninterruptible Power Supply,UPS)系统在电力调度自动化中的应用面临新挑战。文章分析了UPS系统的概念与分类,重点讨论UPS系统在实时电压调节、频率控制以及负载平衡中的应用及其优化策略。采用高精度监测和智能调节技术能够有效应对电网电压波动和频率偏差,通过动态负载平衡策略可以防止系统过载。这些技术或策略不仅提升了UPS系统的稳定性和可靠性,还提高了电力调度系统的整体效率。展开更多
双变换在线式不间断电源(uninterruptible power supply,UPS)采用蓄电池与直流母线直连的拓扑结构,并将前级整流器和蓄电池直流充电器整合为一体,架构紧凑、系统转换效率高。针对该类型UPS前级电压型整流器提出了一种恒流恒压双模式控...双变换在线式不间断电源(uninterruptible power supply,UPS)采用蓄电池与直流母线直连的拓扑结构,并将前级整流器和蓄电池直流充电器整合为一体,架构紧凑、系统转换效率高。针对该类型UPS前级电压型整流器提出了一种恒流恒压双模式控制策略,其中恒流模式下实现对蓄电池的恒流充电,恒压模式下保持直流母线电压稳定,建立了蓄电池与后级负载并联时的整流器小信号模型,给出了控制环路关键参数设计方法,最后通过10 kW整流器原理样机对所提出的双模式控制策略有效性开展了试验验证。结果表明:在所提出的控制策略下,在线式UPS前级整流器均可实现输入电流的高功率因数,网侧功率因数大于0.99。展开更多
The tokamak start-up is a very important phase during the process to obtain a suitable equalizing plasma, and its governing model can be described as a set of nonlinear ordinary differential equations（ODEs）. In this...The tokamak start-up is a very important phase during the process to obtain a suitable equalizing plasma, and its governing model can be described as a set of nonlinear ordinary differential equations（ODEs）. In this paper, we first estimate the parameters in the original model and set up an accurate model to express how the variables change during the start-up phase, especially how the plasma current changes with respect to time and the loop voltage. Then, we apply the control parameterization method to obtain an approximate optimal parameters selection problem for the loop voltage design to achieve a desired plasma current target. Computational optimal control techniques such as the variational method and the costate method are employed to solve the problem, respectively. Finally, numerical simulations are performed and the results obtained via different methods are compared. Our numerical parameterization method and optimization procedure turn out to be effective.展开更多
The traditional deadbeat control for UPS inverters has a robustness problem. The parametric imprecision can greatly harm the stability of the system, which restricts the application. A novel robust deadbeat control me...The traditional deadbeat control for UPS inverters has a robustness problem. The parametric imprecision can greatly harm the stability of the system, which restricts the application. A novel robust deadbeat control method is proposed in this paper to deal with the problem. In the proposed control method, a proportional element is added to the traditional deadbeat control in order to improve the robustness to parametric imprecision. To eliminate the error between output voltage and voltage reference caused by environmental noise and parametric deviation, a model reference adaptive regulator is also added to the control method. A 1kVA prototype is built based on DSP. Theoretical analysis and experimental results show that the robustness for parametric variation of the proposed method is much better than the traditional deadbeat control. The system can remain stable even when the systemic parameters have a large deviation from calculating parameters. The system has small static error and fast dynamic response with the new control method. This method is easy to realize in DSP and is suitable for full digital realization of UPS.展开更多
Controlling the poloidal field (PF) in the HT-7U superconducting tokamak is critical to the realization of the mission of advanced tokamak research. Plasma start-up, plasma position, shape, current control and plasma ...Controlling the poloidal field (PF) in the HT-7U superconducting tokamak is critical to the realization of the mission of advanced tokamak research. Plasma start-up, plasma position, shape, current control and plasma shape reconstruction have been performed as a part of its design process. The PF coils have been designed to produce a wide range of plasmas. Plasma start-up can be achieved for multiple conditions. Fast controlling coils for plasma position inside the vacuum vessel are used for controlling the plasma vertical position on a short timescale. The PF coils control the plasma current and shape on a slower timescale. VXI (VME bus extensions for Instrumentation) Bus system and DSP (Digital Signal Processor is a basic unit of the feedback control system), the response time of which is about (2-4) ms. The basic unit of this system, the shape-controlling algorithms of a few critical points on plasma boundary and real-time equilibrium fitting (RTEFIT) will be described in this paper.展开更多
文摘In order to get a globally optimized solution for the Elevator Group Control System (EGCS) scheduling problem, an algorithm with an overall optimization function is needed. In this study, Real-time Particle Swarm Optimization (RPSO) is proposed to find an optimal solution to the EGCS scheduling problem. Different traffic patterns and controller mechanisms for EGCS are analyzed. This study focuses on up-peak traffic because of its critical importance to modern office buildings. Simulation results show that EGCS based on Multi-Agent Systems (MAS) using RPSO gives good results for up-peak EGCS scheduling problem. Besides, the elevator real-time scheduling and reallocation functions are realized based on RPSO in case new information is available or the elevator becomes busy because it is unavailable or full. This study contributes a new scheduling algorithm for EGCS, and expands the application of PSO.
文摘针对现有方法控制不间断电源(Uninterrupted Power Supply,UPS)时电源运行稳定性差的问题,开展高频模块化UPS并联控制技术研究。首先建立高频模块化UPS并联运行等效电路,其次设计UPS滑模变结构控制策略,最后将比例-积分-微分(Proportional Integral Derivative,PID)控制与UPS滑模变结构控制相融合,提出一种控制技术。实例应用证明,所提技术可以显著提升电源运行动态性和稳定性,具有较大的应用价值。
文摘为解决电力系统中不间断电源(Uninterruptible Power Supply,UPS)调度的自动化问题,提出一种基于分布式控制的UPS调度自动化算法。在深入分析电能需求的特性和系统可靠性要求的基础上,设计分布式控制架构,并选择适用于UPS调度的分布式算法,主要包括负载预测与动态调整、分布式能量管理和故障容忍性设计,并通过全面的性能评估,验证算法的可靠性和健壮性。所提算法为UPS调度自动化提供一套全面、可靠的解决方案,有望推动电力系统智能化和效率提升。
文摘不间断电源(Uninterruptible Power Supply,UPS)系统是广电播控机房中至关重要的设备之一,其性能稳定性直接影响播控机房的正常运行。深入研究UPS系统的概述、配置方法、设备选型与配置以及性能评估等方面,为广电播控机房UPS的合理配置提供理论支持和实践指导,同时为UPS系统的运行与管理提供重要参考。
文摘随着电力需求的不断增长,传统不间断电源(Uninterruptible Power Supply,UPS)系统在电力调度自动化中的应用面临新挑战。文章分析了UPS系统的概念与分类,重点讨论UPS系统在实时电压调节、频率控制以及负载平衡中的应用及其优化策略。采用高精度监测和智能调节技术能够有效应对电网电压波动和频率偏差,通过动态负载平衡策略可以防止系统过载。这些技术或策略不仅提升了UPS系统的稳定性和可靠性,还提高了电力调度系统的整体效率。
文摘双变换在线式不间断电源(uninterruptible power supply,UPS)采用蓄电池与直流母线直连的拓扑结构,并将前级整流器和蓄电池直流充电器整合为一体,架构紧凑、系统转换效率高。针对该类型UPS前级电压型整流器提出了一种恒流恒压双模式控制策略,其中恒流模式下实现对蓄电池的恒流充电,恒压模式下保持直流母线电压稳定,建立了蓄电池与后级负载并联时的整流器小信号模型,给出了控制环路关键参数设计方法,最后通过10 kW整流器原理样机对所提出的双模式控制策略有效性开展了试验验证。结果表明:在所提出的控制策略下,在线式UPS前级整流器均可实现输入电流的高功率因数,网侧功率因数大于0.99。
基金supported by the National Natural Science Foundation of China(Grant Nos.61104048 and 61473253)the National High Technology Research and Development Program of China(Grant No.2012AA041701)
文摘The tokamak start-up is a very important phase during the process to obtain a suitable equalizing plasma, and its governing model can be described as a set of nonlinear ordinary differential equations（ODEs）. In this paper, we first estimate the parameters in the original model and set up an accurate model to express how the variables change during the start-up phase, especially how the plasma current changes with respect to time and the loop voltage. Then, we apply the control parameterization method to obtain an approximate optimal parameters selection problem for the loop voltage design to achieve a desired plasma current target. Computational optimal control techniques such as the variational method and the costate method are employed to solve the problem, respectively. Finally, numerical simulations are performed and the results obtained via different methods are compared. Our numerical parameterization method and optimization procedure turn out to be effective.
文摘The traditional deadbeat control for UPS inverters has a robustness problem. The parametric imprecision can greatly harm the stability of the system, which restricts the application. A novel robust deadbeat control method is proposed in this paper to deal with the problem. In the proposed control method, a proportional element is added to the traditional deadbeat control in order to improve the robustness to parametric imprecision. To eliminate the error between output voltage and voltage reference caused by environmental noise and parametric deviation, a model reference adaptive regulator is also added to the control method. A 1kVA prototype is built based on DSP. Theoretical analysis and experimental results show that the robustness for parametric variation of the proposed method is much better than the traditional deadbeat control. The system can remain stable even when the systemic parameters have a large deviation from calculating parameters. The system has small static error and fast dynamic response with the new control method. This method is easy to realize in DSP and is suitable for full digital realization of UPS.
基金This work was supported by the National Meg-science Engineering Project of the Chinese Government
文摘Controlling the poloidal field (PF) in the HT-7U superconducting tokamak is critical to the realization of the mission of advanced tokamak research. Plasma start-up, plasma position, shape, current control and plasma shape reconstruction have been performed as a part of its design process. The PF coils have been designed to produce a wide range of plasmas. Plasma start-up can be achieved for multiple conditions. Fast controlling coils for plasma position inside the vacuum vessel are used for controlling the plasma vertical position on a short timescale. The PF coils control the plasma current and shape on a slower timescale. VXI (VME bus extensions for Instrumentation) Bus system and DSP (Digital Signal Processor is a basic unit of the feedback control system), the response time of which is about (2-4) ms. The basic unit of this system, the shape-controlling algorithms of a few critical points on plasma boundary and real-time equilibrium fitting (RTEFIT) will be described in this paper.
