而电力系统谐波模拟装置是谐波研究的最基本工具之一。
The electric power system harmonics simulator rig is one of the basic tools which are used to study harmonics.
而电力系统同样长期存在着地理信息格式不统一的问题，这为各子系统的协同工作带来了不便。
For a long time, the power system also have the problem of no unified format in its geographic information system, which brought inconvenience to the collaborative work of its subsystems.
低频振荡是一种不利于电力系统安全和稳定运行的现象，而电力系统稳定器(PSS)可以有效抑制低频振荡。
Low frequency oscillation is harmful to power system security and stability, and as one of solutions power system stabilizer (PSS) can effectively restrain such a phenomena.
低频振荡是一种不利于电力系统安全和稳定运行的现象，而电力系统稳定器（PSS）可以有效抑制低频振荡。
The operation principle of an improved rotational speed power system stabilizer(PSS)is analyzed with the power system damping analysis method.
而电力系统规模的不断扩大，电网互联紧密程度不断加强，系统复杂程度不断提高，系统的电压安全稳定问题却越来越突出。
But with power system enlarged, the tightness of network interlinks, and enhanced complexity degree of system, security and steady problems of voltage emergence.
工作人员已经为设备升级、树木修剪及全面加强运行与华盛顿地区与新泽西的Pepco电力系统的可靠性而工作了数月。
Crews have been working for months to upgrade equipment, trim trees, and overall harden the reliability of the Pepco power system, which runs from the Washington area into New Jersey.
美国电力系统具备25亿瓦的泵送水电容量，但大部分优而廉的水库已被占用，而创建新水库并非对环境无害。
The U.S. electric system has 2.5 gigawatts of pumped hydro storage capacity, but most of the good, cheap sites are already occupied, and creating new reservoirs is not environmentally benign.
为保持海滩明亮和安全而不能引导电力系统到岸边，从而太阳下山后出现了严重的问题。
The inability to channel electricity to the shore has created serious problems keeping beaches well-lit and safe past sun down.
而传统用于向船舶电力系统供电的辅助动力机随之被关闭。
The vessels then shut down auxiliary engines that have historically powered shipboard electrical systems.
作为电力系统安全分析中的重要组成部分，偶然事故的选择由于在分析过程中加入了对事故发生率的考虑而变得更具有合理性。
As an essential part in the power system security analysis, the whole process of contingency selection becomes more sensible by taking the probability aspect into consideration.
近些年，越来越多的人认识到电力系统电压稳定问题是一个动态问题，而电压崩溃点是可以提前预知的。
In recent years, more and more researchers have realized that voltage stability of power system is a dynamic phenomenon, and voltage collapse point can be predicted in advance.
电力系统负荷预报模型因负荷构成及采用的建模技术不同而各异。
Load forecasting models in power system is different due to load constitutes and modeling technique.
超导电力设备是超导电力系统的重要组成部分，而仿真分析一直是设备开发的重要手段之一。
The superconductive electrical equipment is an important part of superconductive electric power system and the simulation analysis is one of the main means in equipment development.
因此，谐波成为一个长期而重要的研究方向，对电力系统工作者提出了新的挑战。
Thus harmonics become a long-term and important issue for investigation, and it is a challenging problem for power system researchers.
电力系统的接地问题是一个看似简单、而实际上却非常复杂又至关重要的问题，它直接关系到人身和设备的安全。
The grounding problem of power systems seems very simple, but is much complex and important for personnel and equipment safety.
电力系统无功功率补偿不足会引起功率因数下降，而三相功率不平衡则会影响到用电设备的安全。
The power factor of power system will be decreased by under-compensation of reactive power and it is harmful for the devices of customers while the power in the three phases are unbalanced.
去年，俄国的一个大坝的变压器已因为电磁浪涌或者电磁脉冲而爆炸，导致了法国航空公司的447班机的电力系统崩溃。
Electromagnetic surge or pulse has blown up step-up transformers in a Russian dam within this past year, and created complete electrical failure in Air France 447.
负荷预测是电力系统一项重要而基础的工作。
Load forecast is an important and basic job in power system.
据北京晨报报导，一辆周二由上海开往北京的京沪线高铁因为电力系统的不明故障而晚点了。
On Tuesday yet another high-speed train from Shanghai to Beijing was delayed due to unexplained electrical problems, the Beijing Morning Post reported.
电力系统中有许多混合优化问题，采用常用方法求解难以奏效，而模拟进化方法是一种新型有效的优化方法。
There exist a lot of composite optimization problems in power systems, which are difficult to be solved by usual methods.
线路故障定距一直是电力系统重要而难于解决的课题。
Fault location is a difficult problem to solve in power system.
近些年，越来越多的人认识到电力系统电压稳定问题是一个动态问题，而电压崩溃点是可以提前预知的。
These years, more and more power researchers have realized that voltage stability in power systems is a dynamic phenomenon, and voltage collapse point is predicted in advance.
介绍了最大最复杂的北美电力系统在全面引入电力市场机制后所出现的新变化和新问题：将工业与商业合并在一起而形成的新型工商业电力系统；
The new changes and problems in the largest and most complex North American power system, after its all-round deregulation introducing market principles into practice, are presented and analyzed.
本文根据电力系统遥视中的实时性要求，系统而深入地研究了视频压缩编码的理论以及小波变换在视频压缩中的应用。
For the realtime requirement of Remote Watching in Power system, the theory of Video Compression and the application of Wavelet transform are systematically studied.
复杂电力系统发生复故障时，方向高频保护可能正确动作也可能不正确动作，而继电保护的不正确动作将直接危害电力系统的安全稳定运行。
While multiple faults occur in complex power system, the pilot protections could correctly operate or not, and incorrect operation of the pilot protection is harmful to the power system.
针对目前计算机网络中的不安全因素，研究在电力系统中利用灾难恢复技术，为保证OA系统数据安全可靠而采取的措施，提出OA系统的数据备份及灾难恢复方案。
In view of the present insecurity factors in computer network, this paper analyzes data disaster recovery technology, puts forward an effective data backup and disaster recovery solution of OA system.
超导电力技术将为电力工业带来重大的技术突破，其在电力系统中的应用具有重大意义，而失超保护则是对超导电力系统安全运行的保障。
Superconductive power technology will bring the great technical breakthrough for the power industry, and also has the great significance in the application of electric power systems.
超导电力技术将为电力工业带来重大的技术突破，其在电力系统中的应用具有重大意义，而失超保护则是对超导电力系统安全运行的保障。
Superconductive power technology will bring the great technical breakthrough for the power industry, and also has the great significance in the application of electric power systems.
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