共查询到20条相似文献,搜索用时 78 毫秒
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为了实现蓄电池不同充放电控制策略之间的切换,提出了一种基于蓄电池荷电状态(state of charge,SOC)实时监测的蓄电池充放电管理的控制方法。在考虑蓄电池的动态数学模型基础上,研究了蓄电池的SOC监测、充放电特性曲线、充放电控制电路、充放电管理策略和电池的分组管理等问题。以蓄电池的SOC作为蓄电池充、放电判断条件,实现了蓄电池进行自主充、放电管理的控制策略。利用PSCAD/EMTDC仿真软件,通过算例系统验证了蓄电池模型和充放电控制方法的正确性和有效性。研究表明,通过合理的蓄电池充、放电管理及切换,实现蓄电池充放电全过程,为蓄电池组无论作为独立电源还是在微网孤岛模式下与其他间歇性能源相配合使用均提供了一定的理论参考。 相似文献
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阀控式胶体蓄电池技术的发展概述 总被引:2,自引:1,他引:1
简述了国内外胶体蓄电池技术的发展概述,从理论上说明了胶体蓄电池的性能特点,结合研究和试验,分析了管式胶体蓄电池、12 V纯胶体蓄电池和混合胶体蓄电池的性能和寿命特性,并指出胶体蓄电池的应用发展方向。 相似文献
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本文以三维辅助设计软件Pro/ENGINEER设计开发接触器为例。介绍三维计算机系统的功能与特点、组成、硬件要求以及在产品设计开发中的应用。 相似文献
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Kennedy W. N. Crichton C. C. Cillies D. A. Criffard W. F. Fischer H. C. Hurty C. Lampe W. Pobbins C. A. Stein W. W. Yasuda E. 《Power Delivery, IEEE Transactions on》1986,1(3):161-166
The dielectric conditions which are unique to converter transformers and smoothing reactors are examined. Both steady state and transient situations are discussed. Two additional tests are recommended for this equipment - a long term dc applied potential test and a polarity reversal test. Formulae are developed to calculate proposed test levels, and guidelines are presented concerning allowable partial discharge levels during the tests. 相似文献
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针对保定供电公司GPRS负荷管理系统运行过程中系统运行速度慢的问题进行了测试、分析,并提出具体的改进措施,如对统计功能和补测功能SQL语句进行优化、系统硬件配置的升级等,确保了系统的正常运行。 相似文献
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Artificial neural networks are explained, and the different types are described. Three different tasks for which they are suitable are discussed. They are pattern classification and associative memory, self-organization and feature extraction, and optimization 相似文献
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Two main types of replacement liquid have been developed, high molecular-weight hydrocarbons and polydimethylsiloxane (silicone). These liquids are formulated to withstand fairly large amounts of electrical arcing, and are less flammable than mineral oils. These properties qualify the liquids for use in installations where less-flammable liquids are required and where the use restrictions associated with the products are followed. The requirements of the National Electrical Code are described and the advantages of using less-flammable liquids are also described. The fault mechanisms of transformers are discussed. The UL investigation of transformer liquids and the limitations of use are also discussed 相似文献
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A. Cichocki R. Unbehauen 《International Journal of Circuit Theory and Applications》1991,19(2):161-187
The primary goal of this paper is to solve some types of optimization problems whose objective functions and constraints are smooth and continuously differentiable and which are not suited for digital signal processing. the optimization problems are mapped into systems of first- and second-order non-linear ordinary differential equations and/or systems of difference equations. These systems of equations are simulated by appropriate switched-capacitor (SC) circuits employing some neural network (neurobiological) principles. New switched-capacitor architectures for on-line solving of non-linear optimization problems are proposed and their properties are investigated. Various circuit structures are investigated to find which are best suited for SC CMOS implementation. the structures developed exhibit a high degree of modularity, and a relatively small number of basic building blocks (computing cells) are required to implement effective and powerful optimization algorithms. Basic mathematical operations, e.g. multiplication, addition and non-linear scaling transformation, are accomplished employing advanced SC techniques. the validity and performance of the circuit structures developed are illustrated by intensive computer simulations employing TUTSIM and NAP programmes. 相似文献
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The history of computer graphics is sketched. Hardware principles are outlined, and the various types of display are described. Computer graphic standards are discussed. Future developments are predicted 相似文献