电网输电断面动态热稳定限值在线计算方法

朱斌; 邱丽君; 王勇; 吴海伟; 潘小辉; 刘俊

引用本文:	朱斌,邱丽君,王勇,等.电网输电断面动态热稳定限值在线计算方法[J].电力系统保护与控制,2017,45(3):94-99.
	ZHU Bin,QIU Lijun,WANG Yong,et al.Online calculation method for dynamic thermal stability limit of transmission section[J].Power System Protection and Control,2017,45(3):94-99

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电网输电断面动态热稳定限值在线计算方法
朱斌¹,邱丽君²,王勇²,吴海伟¹,潘小辉³,刘俊²
(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)

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。

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

DOI：10.7667/PSPC160195

分类号:

基金项目: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”

Online calculation method for dynamic thermal stability limit of transmission section

ZHU Bin¹,QIU Lijun²,WANG Yong²,WU Haiwei¹,PAN Xiaohui³,LIU Jun²

(1. Jiangsu Electric Power Company, Nanjing 210024, China;2. China Electric Power Research Institute, Beijing 100085, China;3. Nanjing Power Supply Bureau of Jiangsu Electric Power Company, Nanjing 210019, China)

Abstract:

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. This work is supported by Science and Technology Project of State Grid Corporation of Cina “Research on Key Techniques of Transmitting Capacity Promotion of Urban Core Transmission Line.”

Key words: dynamic capacity-increase regulating system power grid section dynamic power limit on-line calculation

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