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胡萍 《电子制作.电脑维护与应用》2013,(15):208
电力电子技术是使用电力电子器件对电能进行变换和控制的技术,即应用于电力领域的电子技术。电力电子技术分为电力电子器和变流技术二个分支,并且现已大量应用到电工系统的控制技术中。本文综述电力电子器件和电力电子技术的应用,并展望电力电子技术在现代控制中的发展。 相似文献
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DSP在现代电力电子与交流电机控制系统中的应用 总被引:5,自引:0,他引:5
以TI公司的DSP为主线回顾了DSP在现代电力电子与交流电机控制系统中应用的发展历程,介绍了新一代电机控制专用DSP及其相关技术的现状,以全数字化电机控制平台为例说明其典型应用,并对DSP在现代电力电子与电机控制领域的发展方向提出展望。 相似文献
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航迹的合理控制是影响无人机(UAV)智能决策重要因素。考虑UAV巡检的局部观测性和任务环境的高空复杂性,以电力巡检领域知识为背景,提出面向UAV电力巡检的语义实体构建及航迹控制方法。首先,基于电力巡检领域的实体知识构建空间拓扑网络,并生成关于位置节点的语义航迹序列网络及其语义接口;然后,根据空间拓扑结构相似性度量的结果集,提出安全许可机制和基于强化学习的航迹控制策略,实现UAV电力巡检在统一的概念内涵和位置结构上的轨迹控制。实验结果表明:作为UAV巡检的实例,所提方法得到的最优策略能获得最大化的鲁棒性能;同时,该方法通过强化学习方法使目标网络的适应度稳定收敛且实体区域覆盖率高于95%,为UAV电力巡检任务决策提供了飞行依据。 相似文献
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C''''2000系列DSP及其应用技术 总被引:2,自引:0,他引:2
本文回顾了TI公司的C'2000系列DSP在现代电力电子与交流电机控制系统中应用的发展历程,介绍了新一代电机控制专用DSP及其相关技术的现状,并对DSP在现代电力电子与电机控制领域的发展方向提出展望. 相似文献
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随着新能源发电接入电力系统比例的不断提升,电力系统对新能源发电参与系统一次调频提出了具体要求.频率调差系数是评估新能源电站一次调频调节量的重要指标,系统对于新能源电站的调差率是预设的.然而系统发生频率波动时,无法预知新能源电站的运行状态,单一控制参数下新能源电站无法保证调频量满足系统需求.鉴于此,本文提出了基于调频量闭环控制的新能源电站一次调频控制参数动态修正方法,根据新能源电站的运行状态,动态调整其频率调差系数,使得新能源电站运行在不同状态下均可以满足调频要求,支撑系统频率稳定性. 相似文献
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《Control Engineering Practice》1999,7(4):531-536
Fuzzy control of the super-conducting magnetic energy storage (SMES) is proposed here to improve the transient stability and damping requirements of multi-machine power systems. The effects of the SMES control on the line power transfer are considered in the design of the fuzzy controller. A theoretical realisation of the proposed control scheme is presented and a simulation study on the New-England test system is carried out. A practical implementation, based on local measurements, is explained. The improvement of the system’s critical clearing time, and also the system damping requirements, are clearly demonstrated. Finally, a conclusion is provided. 相似文献
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为提高无功功率的补偿效果,在常规的PID控制和模糊控制的基础上,本文提出了一种模糊PID参数自整定无功补偿方法。该方法采用两输入三输出的形式,以功率因数和功率因数变化率作为输入设计PID控制系统,采用模糊推理对PID控制器的控制参数进行在线整定,给出了参数自整定的规则。利用MATLAB软件对其进行计算、仿真,其结果符合预期目标。此方法既能提高无功补偿的效率,又能增强系统的跟随性。 相似文献
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The concepts of hierarchical system theory, in conjunction with power system engineering, have been applied to enable the real-time control of a large-scale power distribution system.1 The control objective of the distribution system consists of security (equipments protection) and operation (continuity of service) requirements to be satisfied within the feasible control boundaries for all substations composing the distribution system. The overall control strategy for each substation is decomposed into independent control functions which are ordered (ranked) to meet a hierarchy of control requirements specified by the system's physical operation. This approach was adopted not only to simplify the real-time control problem solution, but also was necessitated by the requirement that a partial feasible solution be provided which meets higher priority objectives when a total feasible solution does not exist. This paper describes, in the hierarchical framework, the physical process, the network decomposition and modeling, the control decomposition and criteria, and the control procedure along with numerical results. 相似文献
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Tiejun Zhang Gang Feng 《Fuzzy Systems, IEEE Transactions on》2009,17(2):357-371
The solid oxide fuel cell (SOFC) is widely accepted for clean and distributed power generation use, but critical operation problems often occur when the stand-alone fuel cell is directly connected to the electricity grid or the dc electric user. In order to address these problems, in this paper, a data-driven fuzzy modeling method is employed to identify the dynamic model of an integrated SOFC/capacitor system. A novel offset-free input-to-state stable fuzzy predictive controller is developed based on the obtained fuzzy model. Both the rapid power load following and safe SOFC operation requirements are taken into account in the design of the closed-loop control system. Simulations are also given to demonstrate the load following control performance of the proposed fuzzy predictive control strategy for the SOFC/capacitor power system. 相似文献
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通过可编程序逻辑控制器(PLC)与QNX实时系统相结合实现新的HT-7DNB(中性束诊断)电源控制系统所要求的实时远程控制要求。以现场总线控制层,PLC及QNX6.3.2实时控制层和Windows监控层构成的星型连接局域网实现了上下位不同操作平台间的电源控制系统。从硬件平台选择、软件程序设计、网络设计分析等方面着手,完成了DNB电源实时控制系统的设计与实现。实验表明:该系统实时性良好,性能稳定可靠,各电源时序脉冲误差不超过1 ms,符合HT-7实验要求。 相似文献
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Hybrid Discrete and Continuous Control for Power Systems 总被引:2,自引:0,他引:2
The control of the electricity supply from generation to end-use has been an engineering and mathematical challenge for many decades. The continuous increase in power requirements, system interconnections and technological options prompted the search for discrete and continuous control systems. With the emergence of competition and limits on infrastructure construction, new methods of system control are needed to improve performance, to achieve minimum cost and desired reliability and to meet environmental requirements. The purpose of this paper is to describe a few electrical system control problems and introduce them to the Discrete Event Control research community with the expectation that useful approaches and valuable results will be developed and directed to the benefit of electric power system control needs. 相似文献
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以西山孝义金岩公司自备电厂为背景,主要结合循环流化床锅炉机组的运行特点和控制特性,对其热工系统运用集散控制方式进行控制,并采用浙大中控的WebFiled JX-300X系统对单元机组的热工控制系统做了初步的整体设计. 相似文献
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目前,在二代加核电站中,核级冷水机组控制系统普遍采用可编程逻辑控制器实现机组控制及保护等功能。随着三代核电站对安全标准的提高,传统核级冷水机组控制系统已无法满足核电厂对控制系统安全分级、设备鉴定以及设计验证的要求。通过分析三代核电厂对核级冷水机组的安全分级及功能要求,提出采用安全级数字化仪控平台实现机组的控制及保护。控制系统在设计过程中,采用了隔离、功能分散、故障安全以及冗余配置等设计方法,全面提升了核级冷水机组控制系统的可用性及可靠性,进而提高了核级冷水机组在电厂事故工况下执行安全功能的能力。该控制系统的设计及实施,为后续核级主设备采用安全级数字化仪控平台实现控制系统设计提供了更好的解决方案。 相似文献