电网

The domestic and abroad development trends of electric grid peak load regulatinghad been researched in the thesis.

本文调研了国内外电网调峰问题的发展动态，提出我国火电机组参与电网调峰是电力工业不可回避的课题。

The effect of DSM on reducing the peak load value is studied. This paper also introduces the mehtod of dealing with DSM in network planning.

本文分析了DSM 对负荷的调节作用，总结了DSM 对配电网规划的影响，探讨了在高压配电网规划中对DSM 影响的处理方法。

Recent three rupture faults of isolating switch post insulator occurred in Hebei South Electric Power Network are introduced firstly, combined with the practice cases during operation,some methods of optimizing the operating scheme to reduce the insulator rupture risk are raised,in the end some proposals to deal with such problems are presented.

简要介绍了河北南部电网近期发生的3起隔离开关支柱绝缘子断裂事故，结合电网运行中实际操作案例提出了优化倒闸操作方案以降低隔离开关支柱绝缘子断裂危害的几种方法，并给出了应对此类问题的建议。

Power transformer is one of the most important and critical equipments in power grid.

电力变压器是电网中能量转换、传输的核心，是电网中最重要和最关键的设备。

Article 8 On both sides of electric wire fences should be erected protective nettings with clear warning signs (no protective netting is required for electric fences 2.5 metres above the ground).

第八条 电网内外都应该有护网和显明的警告标志（离地2.5公尺以上的电网可不装护网）。

The monitoring results of the power frequency electric field intensity, power frequency magnetic field intensity ,radio interference and noise of sensitivity areas near the representative transformer substations and power transmission lines are analyzed emphatically.

简单介绍了安徽电网的基本概况，重点分析了具有代表性变电站和输电线路附近敏感区域的工频电场强度、工频磁场强度、无线电干扰、噪声等，全面评价安徽电网环境状况，指出存在的问题，并提出了相应的建议。

Since the voltage not only has relationship with both the reactive power and the balance of reactive load, but also relies on the structure of network and capability of voltage regulation, the system takes all the factors above into consideration and adopts the methods as follows: realizing grading control and management according to the voltage level and region partition, realizing jointly regulation and information pool by the application of advanced software in local and central station, realizing the optimal control of reactive voltage based on the measurement data from the regulative automation system and the angle of the whole system, realizing the exact application of reactive compensator and the on-load tap appropriate changer for voltage regulation transformers , and realizing the balance of reactive voltage in local site.

随着调度自动化系统的日益普及，以及越来越多的电网中的有载调压分接开关和电容器补偿装置投入使用，本课题研究开发基于分级递阶的地调/中心站模式无功电压控制系统，由于电压既与无功功率和无功负荷平衡有关，又与电网结构、调压能力有关，所以系统考虑电压等级、按区域实施分级控制、分级管理，利用中心站和地调的电力系统高级应用软件的作用实现众多装置的联合调整，信息共享。

While researching the optimal operation of hydropower station, it is essential toconsider the optimization of operating efficiency, vibration characteristics of unit andthe safety of electric power system meanwhile. The researches of optimal operation ofLijiaxia Hydropower Station of two-row placed units are as follows: 1. Summarizes the operation experience of Lijiaxia Hydropower Station in recentyears, analyses the demands to the operation of station, provides the problems existedand the research direction of optimal operation.

在电站的运行优化研究同时考虑电站的运行效率的优化、运行状态的优化和电网安全问题是必要的，针对李家峡双排机的水电站的优化运行问题开展以下几方面的研究：(1)总结近几年来李家峡电站的运行经验，分析电网对李家峡电站运行的要求，提出了运行存在的问题和优化运行的研究方向。

The system can selective trip the overcurrent line in 0.2 second so that a serious override trip can be avoided.

该系统能够在电网发生短路故障后0 。2 s内实现有选择性的快速断电，从而避免井下电网因越级跳闸而造成的大面积停电。

In case lift users are stranded in a lift due to failure of software or failure of electricity, lift main tenance workers come to their rescue as soon as they are informed. First, power supply is cut off, lift traction engine clutch is loosened and manual winding is performed by two persons.

在乘客电梯的使用过程中，因电梯软、硬件故障或电网故障，使电梯乘客被困于电梯中，通常情况下，电梯维保员接到被困的信息时，进行人工救援：首先把外电网切断，将电梯曳引机抱闸松开，进行人工盘车，此时必须两人配合才能完成。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。