电网

Design and implementation of North China Grid integral power telemeter and settlement system is proposed.

设计和实现了华北电网一体化电能量计量计费系统。

This power control automation system will realize telemeter, tele-signaling, tele-control and tele-regulation in power network.

这种电力控制自动系统可实现电网中的遥测、遥信、遥控和遥调。

With the development of modernization of electric system network and improvement of industry and enterprise, the request for automation in substation is higher and higher. The automation system is required to control the overall situation of the whole electrified wire netting, monitor and control the condition of device, and fulfill four remote functions, that is, telemeter, communication,remote adjustment, and remote control .In addition, the system should record thehistorical data, form tables, analyze the data as well.

随着我国电力系统网络大规模改造以及大型工矿企业的升级，变电站对自动化程度的要求越来越高，要求能够综合监控整个电网的运行情况，监控一次设备的状况，实现四种功能(遥测、遥信、遥调、遥控)，以及历史记录、报表、事故分析等等。

The automation system is required to control the overall situation of the whole electrified wire netting, monitor and control the condition of device, and fulfill four remote functions, that is, telemeter, communication, remote adjustment, and remote control .In addition, the system should record the historical data, form tables, analyze the data as well.

随着我国电力系统网络大规模改造以及大型工矿企业的升级，变电站对自动化程度的要求越来越高，要求能够综合监控整个电网的运行情况，监控一次设备的状况，实现四种功能（遥测、遥信、遥调、遥控），以及历史记录、报表、事故分析等等。

Area power grid; power telemeter and settlement system; application specification; virtual measurement; settlement model; power grid loss analysis model

区域电网；电能量计量计费；应用规范；虚拟计量点；结算模型；网损率波动分析模型

And it emphasized on testing single-phase to ground of power system with floating neutral and separating fault of distribute.

本文讨论了配电网架空线路三相、相间以及单相接地故障的特点，重点讨论了小电流系统单相接地故障的检测。

In recent years, companies in the country with the rapid rise of industry, products widely used in thermal power, hydropower, transmission and distribution, metallurgy, chemical industry, mining, construction, urban and rural power grids, as well as supporting other projects.

近年 来公司在全国同行业中迅速崛起，产品广泛应用于火电、水电、输配电、冶金、化工、矿山、建筑、城乡电网改造以及其他项目配套。

Counterparts in the country in recent years the rapid rise in the product is widely used in thermal power, hydropower, transmission and distribution, metallurgy, chemical industry, mining, construction, urban and rural power grids, as well as supporting other projects.

近年来公司在全国同行中迅速崛起，产品广泛应用于火电、水电、输配电、冶金、化工、矿山、建筑、城乡电网改造以及其他项目配套。

Based on the N-1 principle of power system, a nonlinear optimized model of steady state security restriction on the power flow of transmission tie line group is proposed, and its iterative algorithm is detailed.

就电网运行中广泛采用的N-1原则，建立了输电断面潮流静态安全约束的非线性优化数学模型并给出了迭代求解算法。

The paper brings out a few of measures to save energy including rational planning of grid, improvement of line loss management, public line , reactive compensation on-spot, promotion of single-phase transformer and elimination of timeworn facilities, etc.

提出了多种途径的节能措施，包括合理规划电网、加强线损管理、完善公用线路、公用台变无功就地补偿、推广单相变、淘汰落后用电设备等。

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。