Most cited articles
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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2000, 15(2):44-46.
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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.
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.
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
2008, 23(2):13-18.
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2009, 24(1):25-29.
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12 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.
2008, 23(4):72-77.
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The employment of eflergy - saving dispatching could reduce energy consumption and contamination emissions. Under the energy - saving dispatching scheme, the renewable energy units will be given the priority in the system dispatching. Then, the fossil -fueled units are dispatched based on the energy consumption and emission levels with the lowest being dispatched first. The implementation of the energysaving dispatching represents a significant change from the current practice in which each generation unit is allocated for nearly average utilization hours, and will also have some impacts on power grid companies on several aspects such as purchasing cost, system security and network planning. In this paper, a systematical analysis of these impacts is made, and some important problems to be studied are addressed.
The employment of eflergy - saving dispatching could reduce energy consumption and contamination emissions. Under the energy - saving dispatching scheme, the renewable energy units will be given the priority in the system dispatching. Then, the fossil -fueled units are dispatched based on the energy consumption and emission levels with the lowest being dispatched first. The implementation of the energysaving dispatching represents a significant change from the current practice in which each generation unit is allocated for nearly average utilization hours, and will also have some impacts on power grid companies on several aspects such as purchasing cost, system security and network planning. In this paper, a systematical analysis of these impacts is made, and some important problems to be studied are addressed.
2001, 16(4):42-45.
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介绍了笼型感应电动机定子故障的类型,分析了产生故障的可能原因,阐述了热应力、电应力、机械应力、环境应力等对电机绝缘系统的影响及故障的表现状态,提出了相应的解决措施和办法,有助于电动机的维护和剩余寿命的推算.
介绍了笼型感应电动机定子故障的类型,分析了产生故障的可能原因,阐述了热应力、电应力、机械应力、环境应力等对电机绝缘系统的影响及故障的表现状态,提出了相应的解决措施和办法,有助于电动机的维护和剩余寿命的推算.
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.
2001, 16(1):19-22.
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根据POST代数定义的取大算子及正循环算子,设计出了十值TTL"或”门及十值TTL正循环门,其电路结构与原理都较简单,实验证明这些电路工作可靠、性能稳定,可由它们构成功能完备的十值数字系统.
根据POST代数定义的取大算子及正循环算子,设计出了十值TTL"或”门及十值TTL正循环门,其电路结构与原理都较简单,实验证明这些电路工作可靠、性能稳定,可由它们构成功能完备的十值数字系统.
2004, 19(1):82-84.
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污染是植物组织培养中经常遇到的问题之一,且很难控制.研究证明:利用不同浓度及组合杀菌剂对植物组培污染物有较好的抑制作用.
污染是植物组织培养中经常遇到的问题之一,且很难控制.研究证明:利用不同浓度及组合杀菌剂对植物组培污染物有较好的抑制作用.
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.
2010, 25(4):31-35.
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Rural electric network is an important part of the state grid,and it is the new objective and task to construct intelligent rural network in the new era.Building strong and smart rural network is significant to intelligent state grid construction.At fist,the characteristics of the rural network and the meaning of intelligent rural network are introduced in this paper.Then five main contents of intelligent rural network construction are described,including supply mode,intelligent equipment,automation and optimal operation,intelligent communication,management and informationization.Finally some suggestions are put forward for the construction of intelligent rural network.
Rural electric network is an important part of the state grid,and it is the new objective and task to construct intelligent rural network in the new era.Building strong and smart rural network is significant to intelligent state grid construction.At fist,the characteristics of the rural network and the meaning of intelligent rural network are introduced in this paper.Then five main contents of intelligent rural network construction are described,including supply mode,intelligent equipment,automation and optimal operation,intelligent communication,management and informationization.Finally some suggestions are put forward for the construction of intelligent rural network.
