电网技术Issue(11)：3137-3143,7.
互联电网联络线随机功率波动统计特性与评价标准分析
Analysis on Statistic Characteristic and Evaluation Criteria of Tie-line Stochastic Power Fluctuation in Interconnected Power Systems
摘要
Abstract
There are stochastic power fluctuations of AC tie-lines in interconnected power systems under normal operating conditions. Based on historical data of an interconnected power grid integrating two large regional power grids, the statistical characteristics of power fluctuation and frequency deviation of the tie-line and the area control error (ACE) of the interconnected power grid are analyzed, and analysis results show that: the tie-line power fluctuation presents good normal distribution characteristics; the system frequency deviation evidently differs from the normal distribution for the reason that the frequency control reduces the probability of frequency variation greater than 0.03 Hz;the ACE in both controlled areas basically follows normal distribution. It is considered that the tie-line power fluctuation is caused by the ACEs of the two controlled areas at both terminals of the tie-line, so the RMS value of tie-line power fluctuation can be calculated by the RMS values and correlation coefficients of ACEs of both controlled areas, and then the distribution of tie-line power deviation extent can be estimated. The currently used T standard is analyzed and following conclusions are obtained: to realize the goal of controlling tie-line power variation, it’s only required that the sum of responsibility degree index limits of the two controlled areas is less than 2, and it is not necessary to make the threshold of responsibility degree index limit in each controlled area equal to 1;to achieve a fair and rational scheme, it is necessary to carry out a detailed research on the allocation of the threshold of responsibility degree index limit between the two controlled areas when different factors should be taken into accounts synthetically.关键词
互联电网/联络线/随机功率波动/统计特性/ACE/CPS标准/T标准Key words
interconnected power system/tie-line/stochastic power fluctuation/statistic characteristic/area control error/control performance standard (CPS)/T standard分类
信息技术与安全科学引用本文复制引用
陈磊,胡伟,徐飞,李群山,刘涛,朱翠兰..互联电网联络线随机功率波动统计特性与评价标准分析[J].电网技术,2013,(11):3137-3143,7.基金项目
国家自然科学基金项目(51007043)。Project Supported by National Natural Science Foundation of China (51007043) （51007043）
