Most cited articles
2008, 23(2):13-18.
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2007, 22(1):7-12.
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2010, 25(2):73-78.
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2009, 24(2):1-7.
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2010, 25(3):8-12,24.
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2003, 18(1):68-72.
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2009, 24(1):25-29.
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2001, 16(4):35-37.
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采用双极型晶体管设计出了四值TTL非门和与非门,均属于离散逻辑电路.这类门电路可以用于构成四值组合逻辑电路和时序逻辑电路,也可以和DYL系列电路配合使用.
采用双极型晶体管设计出了四值TTL非门和与非门,均属于离散逻辑电路.这类门电路可以用于构成四值组合逻辑电路和时序逻辑电路,也可以和DYL系列电路配合使用.
2000, 15(2):44-46.
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2002, 17(3):68-71.
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运用全量子理论,研究了存在广义克尔介质时,双模压缩真空场与二能级原子相互作用系统中光场的量子特性,着重讨论了介质与辐射场的耦合强度χ以及广义克尔介质的非线性阶数m对光场量子特性的影响.
运用全量子理论,研究了存在广义克尔介质时,双模压缩真空场与二能级原子相互作用系统中光场的量子特性,着重讨论了介质与辐射场的耦合强度χ以及广义克尔介质的非线性阶数m对光场量子特性的影响.
2002, 17(1):27-30.
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介绍了作者开发的负荷特性记录装置,该装置利用新型嵌入式数据采集卡作为前台采样,前置电路进行信号调理,以PC机进行后台数据处理并上传数据记录,可以对城区典型双变压器并列运行及更简单的变电站实现全时间点状态监测和负荷特性记录.具有存储容量大、功能齐全、调试简便、开发周期短、测量精度高等优点.现场运行情况表明:开发工作是成功的,装置能较好满足现场需要.同时,本文还对系统开发过程中遇到的,诸如顺序采样卡采样带来的误差、不同数据采集卡的采样空窗产生的原因及如何修正进行了讨论.
介绍了作者开发的负荷特性记录装置,该装置利用新型嵌入式数据采集卡作为前台采样,前置电路进行信号调理,以PC机进行后台数据处理并上传数据记录,可以对城区典型双变压器并列运行及更简单的变电站实现全时间点状态监测和负荷特性记录.具有存储容量大、功能齐全、调试简便、开发周期短、测量精度高等优点.现场运行情况表明:开发工作是成功的,装置能较好满足现场需要.同时,本文还对系统开发过程中遇到的,诸如顺序采样卡采样带来的误差、不同数据采集卡的采样空窗产生的原因及如何修正进行了讨论.
2000, 15(1):26-29.
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Deka-value logical gate is basically electrocircuit of Deka-value digital system comprised. The circuit constructure and operational principle of Deka-value TTL "NOT" gate and "AND" gate are introduced, a deka-value TTL "NOT-AND" gate circuit is pushed out.
Deka-value logical gate is basically electrocircuit of Deka-value digital system comprised. The circuit constructure and operational principle of Deka-value TTL "NOT" gate and "AND" gate are introduced, a deka-value TTL "NOT-AND" gate circuit is pushed out.
2001, 16(2):23-25.
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电力网络拓扑分析模块的功能就是根据电网的开关状态分析判断出电网的结构(即拓扑),它是EMS、DTS的基础模块.通过对其实质的理解和分析,采用两种算法编写程序.通过实例运算,验证了两种算法编写的程序的可靠性和实时性.
电力网络拓扑分析模块的功能就是根据电网的开关状态分析判断出电网的结构(即拓扑),它是EMS、DTS的基础模块.通过对其实质的理解和分析,采用两种算法编写程序.通过实例运算,验证了两种算法编写的程序的可靠性和实时性.
2008, 23(2):72-75.
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Aiming at the characteristic of transformer fauh and the limitation of traditional fauh diagnosis methods of transformer, the paper developed a BP neural network based algorithm to diagnosis fault of transformer. The neural networks are trained with historical fault exemplar. Application on field data proves the validity of the proposed approach.
Aiming at the characteristic of transformer fauh and the limitation of traditional fauh diagnosis methods of transformer, the paper developed a BP neural network based algorithm to diagnosis fault of transformer. The neural networks are trained with historical fault exemplar. Application on field data proves the validity of the proposed approach.
2008, 23(2):19-23.
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In spite of the well-acknowledged environmental benefits of wind power generation, there is increasing concern upon impacts from wind turbines on local ecosystems and on the natural scenery. Wind power project impacts on environment mainly includes visual pollution （or natural scenery） , noise, avian safety and electromagnetic interference. The impacts on environment from a wind farm are great larger than that from a single wind turbine. Once a wind farm has been built up, the cost to eliminate or mitigate its negative influence would be enormous. Therefore, it is necessary to estimate various negative influences and take appropriate measures to reduce them planning and designing stage. to an acceptable level as early as possible in the
In spite of the well-acknowledged environmental benefits of wind power generation, there is increasing concern upon impacts from wind turbines on local ecosystems and on the natural scenery. Wind power project impacts on environment mainly includes visual pollution （or natural scenery） , noise, avian safety and electromagnetic interference. The impacts on environment from a wind farm are great larger than that from a single wind turbine. Once a wind farm has been built up, the cost to eliminate or mitigate its negative influence would be enormous. Therefore, it is necessary to estimate various negative influences and take appropriate measures to reduce them planning and designing stage. to an acceptable level as early as possible in the
16 Impact and countermeasure of three-phase unbalanced operation for low voltage distribution systems
2009, 24(3):63-67.
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Most of Chinese low-voltage distribution systems use three-phase four-wire Y/Yno（Y/Y） connection mode.The transformer unbalanced operation state is often caused by single-phase loads.The three-phase voltage imbalance and its impact to power quality are analyzed in this paper.Distribution transformer losses and line losses caused by the imbalance are investigated in detail.Some managing and technical countermeasures for the imbalance are also proposed.
Most of Chinese low-voltage distribution systems use three-phase four-wire Y/Yno（Y/Y） connection mode.The transformer unbalanced operation state is often caused by single-phase loads.The three-phase voltage imbalance and its impact to power quality are analyzed in this paper.Distribution transformer losses and line losses caused by the imbalance are investigated in detail.Some managing and technical countermeasures for the imbalance are also proposed.
2009, 24(3):2-9.
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Wind power generator is one of the core components converting wind energy to electric energy. With the rapid developed technology of wind power generation including wind power generators since the end of 70＇s last century, various topologies of wind power generator and wind power systems are developed. The technologies and features of different kinds of wind power generators worldwide are firstly overviewed. Then their control features and drive train types and their strengths and weaknesses are analyzed and compared. Finally the latest development trend and research progress of wind power generator technologies are presented, hoping to offer reference for the research and development of wind power generation in China.
Wind power generator is one of the core components converting wind energy to electric energy. With the rapid developed technology of wind power generation including wind power generators since the end of 70＇s last century, various topologies of wind power generator and wind power systems are developed. The technologies and features of different kinds of wind power generators worldwide are firstly overviewed. Then their control features and drive train types and their strengths and weaknesses are analyzed and compared. Finally the latest development trend and research progress of wind power generator technologies are presented, hoping to offer reference for the research and development of wind power generation in China.
2008, 23(3):79-83.
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Protective Devices input digital need new protective relay test technologies per; a new instrument for protective relay kV substation as an example of protective signals from electronic transformers in digital substations. It and instruments. The digital substation is introduced in the patest is designed, and the protection devices is tested in a 110 devices test for digital substations.
Protective Devices input digital need new protective relay test technologies per; a new instrument for protective relay kV substation as an example of protective signals from electronic transformers in digital substations. It and instruments. The digital substation is introduced in the patest is designed, and the protection devices is tested in a 110 devices test for digital substations.
2001, 16(1):87-90.
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分析了深圳市现状植被的主要类型及其群落结构和特点,提出了深圳市生态风景林的树种选择及景观营造模式.
分析了深圳市现状植被的主要类型及其群落结构和特点,提出了深圳市生态风景林的树种选择及景观营造模式.
2001, 16(1):39-42.
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针对传统无功补偿优化方法的局限性,采用动态规划对电网无功补偿进行优化,能够同时实现无功补偿容量和位置的综合优化.重点介绍了动态规划方法的基本思想、数学模型和计算方法,通过实例计算和分析,证明其具有明显的优越性和实用性.
针对传统无功补偿优化方法的局限性,采用动态规划对电网无功补偿进行优化,能够同时实现无功补偿容量和位置的综合优化.重点介绍了动态规划方法的基本思想、数学模型和计算方法,通过实例计算和分析,证明其具有明显的优越性和实用性.
