电力系统保护与控制2018，Vol.46Issue(1)：116-121,6.DOI:10.7667/PSPC162100
基于负荷和环境温度曲线的输电断面短时过载能力分析
Analysis of the short-time overload capability of the transmission section based on the load and ambient temperature curve
范京艺 1毛安家 2刘岩 1吴卓航 3王春生3
作者信息
- 1. 华北电力大学, 北京 102206
- 2. 国网晋中供电公司,山西 晋中 030600
- 3. 国网辽宁省电力公司经济技术研究院,辽宁 沈阳 110016
- 折叠
摘要
Abstract
Power flow transfer caused by overloaded tie-lines tripping-off is one of the main reasons leading to cascading failure. However, too strict flow restriction of the tie-lines may inhibit the transmission capacity of the line, resulting in a waste of transmission resources. In order to solve the problem of unnecessary load control caused by the change of the sharp-peak load, it is possible to allow the tie-lines to be overloaded in a short time without affecting the safety of the system. Based on the predicted load curve and the ambient temperature change curve, the load flow-temperature model of the tie-lines is established on account of the dynamic thermal equilibrium process. To solve the model, the BS23 algorithm is proposed. The model can be used to calculate the conductor temperature dynamically and determine the short-time overload capability of the tie-lines to improve the transmission capacity. By way of the simulation of a 16-node system, it shows that the proposed method can retain the peak load and keep the line temperature within the allowable range. As a result, the transmission capability of the section is improved effectively.关键词
热平衡/短时过载/输电断面/输电能力Key words
thermal equilibrium/short-time overload/transmission section/transmission capability引用本文复制引用
范京艺,毛安家,刘岩,吴卓航,王春生..基于负荷和环境温度曲线的输电断面短时过载能力分析[J].电力系统保护与控制,2018,46(1):116-121,6.
