电网输电断面动态热稳定限值在线计算方法  

Online calculation method for dynamic thermal stability limit of transmission section

作　　者：朱斌[1] 邱丽君[2] 王勇[2] 吴海伟[1] 潘小辉[3] 刘俊[2] 

机构地区：[1]江苏省电力公司,江苏南京210024 [2]中国电力科学研究院,北京100085 [3]江苏省电力公司南京供电公司,江苏南京210019

出　　处：《电力系统保护与控制》2017年第3期94-99,共6页Power System Protection and Control

基　　金：国家电网公司科技项目"城市核心区输电线路输送能力提升关键技术研究"~~

摘　　要：提出了一种利用实时气象环境和电网运行方式进行稳定断面功率限值在线计算方法,将静态的稳定断面限值转变为根据实时数据变化的动态限值,为电网精益化调控提供支撑。基于动态增容技术将外部系统的微气象数据接入调控系统进行线路动态载流量计算。基于电网模型和实时运行方式,采用支路开断分布因子计算输电断面的潮流动态转移比。基于节点对支路的功率转移分布因子实时分析稳控装置动作对开断后输电断面潮流的影响,对断面限值进行动态修正。提出的方法在南京地区调控系统进行了在线应用,基于实际运行数据对结果进行验证,证明了算法对于高峰时段提升断面输送能力的有效性。An online calculation method for stability section power limit based on real-time microclimate environment and operation mode is proposed. Static stability section limit is transferred to dynamic limit which changes with real-time data, offering technical support to lean regulation of power grid. Based on dynamic capacity-increasing technology, microclimate data in external system is accessed to regulating system and dynamic current carrying capacity of transmission line is calculated. Based on power grid model and real-time operation mode, branch open distribution factor is adopted to calculate dynamic power flow transfer ratio of transmission sections. Based on power transfer distribution factor of node-branch, the influence of stability control device action to transmission section power is analyzed real-timely. And section power limit is modified dynamically. The method has been used in Nanjing district regulating system online. Actual running data is used to verify the results, proving the efficiency of algorithm to improve the transmission capacity of sections in peak period.

关 键 词：动态增容 调控系统 电网断面 动态功率限值 在线计算 

分 类 号：TM74[电气工程—电力系统及自动化]