The electric power industry system is composed of power plants , power transmission networks , electric distribution networks and electric user and it include four vertical and relevant stages : generate electricity , transmit electricity , distribution and power supply . 电力产业系统是由发电厂、输电网、配电网和电力用户组成的整体，包括四个垂直相关的阶段：发电、输电、配电和供电。
About the various ways it may be possible to provide an open grid including the outright purchase of hksar government , or even simply a fair tariff system for independent power producers to access the grid , said liam salter , director of asia - pacific climate and energy programme , wwf 开放电力网络的可行方法，包括由特区政府买下电力网络，或设立一个公平的收费机制，让独立的电力生产商加入输电网络。
Zurich , switzerland , august 30 , 2007 ? abb signed a $ 25 million contract with kenya power & lighting co ( kplc ) to upgrade and expand the system that controls kenya ' s power transmission network and the distribution network in the capital city of nairobi 瑞士苏黎世8月30日消息? ? abb与肯尼亚电力和照明公司( kplc )签署了一份价值两千五百万美元的合同，升级和扩建后者在首都城市内罗毕控制着肯尼亚的输电网络和配电网络系统。
Under the environment of power market , large amount of power wheeling and transmission contracts are frequently trading . it has put forward new technical problems to need be solved immediately how to calculate accurately and improve the total transfer capability ( ttc ) of transmission network 电力市场环境下，大量出现的电力转运及电网中频繁出现的输电交易使得准确计算及提高输电网的最大输电能力（ ttc ）成为亟待解决的技术问题。
It can influence the performance and reliability of space - borne and ground - based technological systems and can destroy the satellates ' work , communication , navigation , transmit electricity and cause the huge economic loss , so it is an important catastrophic space weather event 由于地磁暴可能影响到天基的和地基的技术系统的运行和可靠性，引发卫星运行、通讯、导航、输电网的事故，造成社会经济损失，因此它又是一种重要的空间灾害性天气事件。
It conforms the data correlated to transmission network through data management and virtual reality technology . also it can demonstrate the circumstance and status of the whole transmission network , and can do the automatic verification and simulation of network design , operation and managements . finally it achieves the goal of providing excellent supports in the whole lifecycle of a transmission network “数字输电网络”在本质意义上是一个信息管理平台，它运用海量数据管理及计算机虚拟现实技术，最大程度地整合与输电网络有关的数据，并通过科学的表现方法展现整个输电网络所处的环境及状态，对网络设计、运行及管理中的各种条件约束进行自动校验和模拟，最终达到为输电网络从设计到运行的整个生命周期提供良好数字支撑平台的目标。
Through the company ' s principal operating subsidiary in china , baoding tianwei yingli new energy resources co . , ltd . , yingli green energy designs , manufactures and sells pv modules and designs , assembles , sells and installs pv systems that are connected to an electricity transmission grid or those that operate on a stand - alone basis 透过该公司的主要运营子公司在中国，保定天英利新能源股份有限公司，英利绿色能源设计，制造和销售光伏组件及设计，组装，销售和安装光伏系统，是连接到一个输电网格或者那些运作一个单独的基础。
Reasonable digital models and organization methods are the basic premise to digital power transmission network . this thesis discusses the classification of relevant data and the corresponding disposition methods . it provides multi - scale and multi - level digital models , and realizes the management of digital elevation model , satellite imaging , aerial photos , surface features 合理的数据模型及组织方法是构建“数字输电网络”的基本前提，本文讨论了相关数据的分类及对应的处理方法，提出了多比例尺多层次的数据组织模型，较好地解决了数字高程模型、卫星照片或航拍照片、地表特征物等海量数据的管理。
At the same time , in view of the character of the economic evaluation in grid , this paper chooses the mature evaluation methods in the fields of engineering to evaluate the economic of the grid ' s operation . this paper also takes the analysis of basic and extend break - even . in the end of this paper , according the research ahead , this paper develops the software system and make the case study 同时，结合输电网经济评价自身的特点，优选了工程领域业已成熟的评价方法，将其无缝的移植到对输电网运行经济性的评价上来；并且对输电网运营作了基础的和扩展的盈亏平衡分析，反映不同目标下输电网运营的盈亏状况。
