短路电流实时监视软件的开发及其应用

【作者】 王婷婷；

【导师】 邱家驹；

【作者基本信息】 浙江大学 ， 电力系统及其自动化， 2006， 硕士

【摘要】 随着电能需求量的不断增加,电力系统装机容量急剧上升,大机组比率增大,且大机组一般升压后直接接入高压电网,加上电网中大量使用自耦变压器,从而造成电网短路电流水平过高,部分区域的短路电流已接近或已超过开关的遮断容量。而更高电压等级电网的出现尚需时日,因此系统短路电流超标的问题将会越来越严重。 系统短路电流的超标是电网的安全运行的严重隐患,在目前限制短路电流的装置以及高一电压等级的断路器尚未取得突破性进展的情况下,改变电网结构成为控制短路电流的唯一措施。然而,电力系统运行方式是多变的,频繁的设备操作改变了电网的拓扑结构,系统上某些点的短路电流随时有可能超出相应开关的遮断电流,鉴于以上两点有必要进行实时的电网短路电流监测和断路器遮断容量校核。 短路电流实时监视系统是浙江大学电力系统自动化研究所和浙江省电网公司调度通讯中心合作开发的,项目在浙江省电网运行已一年多,2006年2月的通过项目鉴定。本文简单介绍了软件的基本开发过程,介绍了短路电流实时监视系统在浙江省电网一年多来运行情况。更多还原

【Abstract】 Due to the increasing requirement for the electric power, the installed capacity of generators raises abruptly as well as the ratio of the bulk unit and the amount of auto-transfers used in the power system. Consequently, in some area short-circuit current level is approaching to or have already exceed the breakers’ abrupt capacity. However, the higher-rate voltage girder has not yet widely been used.The excess of the short-circuit current is one of the hidden troubles of the power system safe operation. At present, considering the circumstance that short-circuit current limiters and the higher-rate voltage breakers have not yet advanced, the most efficient means to control the short-circuit current is changing the structure of the power network. Nevertheless, the frequent switch operation results in the alternation of the topology in the power system, which might render the excess of the short-circuit current in some breakers. Given the mentioned above, it is necessary to monitor the condition of the breakers in the power system and check it by the standard of interrupting capacity of the breakers.The auto-check of short-circuit current application, which has operated for nearly one year in the ZheJiang electric pool and has been authenticated in Feb. 2006, was developed under the collaboration of ZheJiang University power system automation research center and ZheJiang electric power company dispatching and communication center. In this thesis, the fundamental developing process of this application is introduced laconically, and the importance is attached to the operation circumstances of this application in ZheJiang Province electric network after its implement.更多还原