Orthogonal Multi-Carrier Modulation(OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.
为克服低压电力线信道的频率选择性和时变性，系统采用正交多载波方式传输信息。
The low-voltage power line channel properties are analyzed in this paper and a decision feedback channel estimation method is proposed on condition of slow time-variant of channel.
该文分析了低压电力线信道特性，利用信道慢时变的特点提出一种适合于电力线信道的判决反馈信道估计方法。
The characteristics of power line channel are the foundation of designing the low voltage power line carrier communication system.
低压电力线信道特性是设计低压电力线载波通信系统的基础。
An electrical transformer, transmission line on the side of low voltage and correlative users constitute the district of the electrical transformer.
配变和低压侧输电线路及其供给的用户群组成了配变台区。
The over-load protection technology is an indispensable constituent of the low-voltage apparatus intellectualization, ensuring the electric motor and the distribution line safe operation.
过载保护技术是低压电器智能化技术的重要组成部分，是保证电动机、配电线路安全运行的重要技术。
Power source. Pneumatic, low voltage or line voltage can be specified.
电源。可以指定气动、低压或线压。
Through this paper, the low-voltage power line network and channel characteristics are researched. The noise and attenuation characteristics of power line channel are measured and analyzed.
本文首先分析了低压电力线网络的特点及信道特性，对电力线信道的噪声和复衰减特性分别进行了测量及分析。
The Wigner Ville time frequency analysis in conjunction with properly selected OFDM parameters is applied to evaluate the signal dynamic range performance over the low voltage power line network.
为了研究OFDM信号在低压电力线上的传输情况，运用基于维格纳分布的时频分析方法对电力线上的信号进行分析。
The system requires two improvements: (1) the ability to counter the severe communication condition of low-voltage power line and (2) the ability to transmit music signal.
系统还需要在两个方面进行改进：(1)抵抗低压电力线恶劣通信状况的能力；(2)适合于音乐信号的传送。
The reason is that the transformer supply area is too broad and the low-voltage line is too long in present distribution model.
究其原因在于现有配电模式中配电变压器供电范围过大，低压线供电半径过长。
Almost all the power converters in use up to now are line-commutated, when the level of active power is low, and reactive power consumed is high, being very harmful for the connection bus voltage.
至今几乎所有的电力变换器为在线换向式的当有功功率较小，而消耗的无功较大时，对所联接母线的电压是非常有害的。
So it will be applicable to different kinds of low-voltage distribution networks and plays its role of reducing line depletion and improving the quality and stability of the power grid operation.
所以它将适用于各类中低压配电网络，起到降低线路损耗，提高电网运行质量和稳定性的作用。
Therefore, there is a wide foreground for the study and application of low-voltage power line communication technology.
因此，研究、开发和应用低压电力线载波通信技术具有非常重大的意义和十分广阔的前景。
Firstly, this paper advanced a control system based on the low-voltage power line carrier.
首先，论文提出了一种基于低压电力线载波技术的总线式控制网络。
This thesis mainly discusses the research on the development of microcomputer measuring and protection device for Mid&Low-voltage transmission line based on double 80296SA platform.
本文研究了基于双80296SA平台的中低压线路微机测控保护装置的开发，包括保护原理的探讨、装置硬件系统的设计、制作、调试和软件系统的开发。
The paper briefly introduces the design options, system configuration, equipment selection and engineering application of low-voltage short-line pilot protections in enterprise's power supply system.
简要介绍企业供电系统的低压短线路纵联保护设计方案、系统配置、设备选择及工程应用。
At present, transmitting speed of medium and high voltage power line carrier is very low, and these kinds of carriers can be used only in low speed situation, and the number of user is limited.
目前的中高压电力线载波通信的传输速率都很低，只能应用于低速的场合，用户容量有限。
Thus, the system can restrain the noise from low voltage power line and improve communication reliability. It may be widely applied to the communication field using low voltage power line.
因此，该低压电力线扩谱通信系统能较好地抑制低压电力线通信信道的干扰，提高了通信的可靠性，可广泛应用于低压电力线通信领域。
The paper is about the hardware circuit & working principle of meter based on the low voltage power line carrier.
本文给出了一个基于低压电力线载波技术的电参数测量仪的硬件系统。
XKM/HYT series terminal block is an important component in low voltage electric equipment It is mainly applied for branching the trunk line, It is the most advanced terminal block in China at present.
浙江西卡姆电力设备有限公司自主研发、生产的XKM/HYT系列主干线分线器是一种全新的作用于主干线上的专用分线低压电器件，是目前国内最先进的优质产品。
Considering the practical engineering of Guangzhou Metro Line 3 and Line 4, the intelligent low voltage distribution system is briefly introduced.
结合广州地铁3、4号线工程实例，介绍智能低压系统的设计和应用。
Channel estimation is researched for OFDM system in low-voltage power line communication in this paper.
本文主要研究基于OFDM的低压电力线通信信道估计算法。
The existing condition of low-voltage power supply system of mine underground was analyzed, in view of the existing problems of low-voltage power supply line, the improvement scheme was proposed.
分析了矿山井下低压供电系统的现状，针对低压供电线路存在的问题提出了改进方案。
OFDM technique has been the mainstream in low-voltage power line communication because of its good capability against interference and high transmission rate.
OFDM技术以其抗干扰性强，传输速率高成为低压电力线高速通信的主流技术。 信道估计算法是OFDM系统接收端的关键技术之一。
Due to many advantages of Orthogonal Frequency Division Multiplexing technique, it becomes the best choice for low-voltage power line broadband communication.
正交频分复用技术以其多种优势成为低压电力线宽带通信的最佳选择，信道估计是正交频分复用系统的关键问题之一。
Designing and manufacturing automatic assembly line of brand printing of low - pressure electrical equipment for schneider Shanghai low voltage terminal app. Co., LTD. 6.
中法合资上海施耐德低压电器有限公司低压电器商标印制自动流水线的设计制造。
The voltage charged on transmission line will be unstable when capacity of transmission line is very low and the charging voltage is high. It then influences the stability of the output pulse.
传输线电容量小而充电电压高时，传输线上的充电电压不稳定，影响输出脉冲电压的稳定。
The various selection methods of low voltage breaker when it was applied in distribution line, motor and lighting are introduced as well as the corresponding installation requirements.
介绍了低压断路器分别应用于配电线路、电动机和照明的选择方法，并就安装时应满足的具体要求作了阐述，提出了断路器在使用和维护过程中应注意的事。
The various selection methods of low voltage breaker when it was applied in distribution line, motor and lighting are introduced as well as the corresponding installation requirements.
介绍了低压断路器分别应用于配电线路、电动机和照明的选择方法，并就安装时应满足的具体要求作了阐述，提出了断路器在使用和维护过程中应注意的事。
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