Examination Method for Coordinated Power Control of AC Tie-line

被引：0

作者：

Liu Z. ^{[1
]}

Liu Y. ^{[1
]}

Xu H. ^{[1
]}

Huang M. ^{[2
]}

Yao Z. ^{[3
]}

Wang Y. ^{[1
]}

机构：

[1] Central China Electric Power Dispatching and Control Sub-center of State Grid, Wuhan

[2] School of Hydropower Engineering & Information Engineering, Huazhong University of Science & Technology, Wuhan

[3] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan

来源：

Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 11期

关键词：

Area control error; Control performance standard; Examination method; Power control of AC tie-line; Tie-line standard 1;

D O I：

10.13336/j.1003-6520.hve.20191031028

中图分类号：

学科分类号：

摘要：

In accordance with the inconsistency between the large-scale power adjustments of provincial grid at the beginning and end of the assessment cycle and the requirements of cross-regional ultra-high voltage tie-line control, we proposed an examination method for power control of provincial tie-line, which is more coordinated with the power control of cross-regional tie-line. Firstly, the essential reasons that the discordance phenomenon occurs between the power control of the provincial tie-line and the regional tie-line are analyzed and revealed as follows: (1) the assessment cycle of current provincial tie-line standard, namely CPS2 standard, is 15 min, so it is hard to constrain the fluctuations in every minute in the assessment cycle of cross-regional tie-line control; (2)the permitted region of area control error(ACE) under CPS2 standard is different from that of T1 (tie-line standard 1) standard. Secondly, to depress the large-scale power adjustments of provincial grid at the beginning and end of the assessment cycle, CPS2 evaluation index is replaced with the mean value of the absolute value of ACE mean of each provincial control area in each minute. Thirdly, evaluation of implementation effect of the new evaluation method shows that the distribution ratio of the accountability points of cross-regional tie-line control in first and last two minutes during each assessment cycle decreases from 27.54% to 26.95%, approaching the average value of 26.67%; the number of the accountability points of cross-regional tie-line decreases from 1 660 to 1 040; the average proportion of duration during which the fluctuations of cross-regional AC tie-line exceed 300 MW per month decreases from 3.219% to 2.506%; the shape of ACE curve of provincial power grid is relatively flat during the period of examination; the average value of ACE per minute of provincial power grid is reduced. The examination method proposed in this paper can be adopted to effectively restrain the large-scale adjustment of provincial grid at the beginning and end of the assessment cycle, and the coordination between provincial tie-line control and cross-regional tie-line control is better. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：3620 / 3626

页数：6

共 19 条

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