摘要
提出一种计及"N-1"约束的多维空间中断面热稳定安全域边界的构建和分析方法。该方法首先通过计算系统各发电机组出力变化对断面线路的功率传输转移分布因子(PTDF),确定对断面功率传输极限影响显著的敏感机组(机群);以敏感机组(机群)的有功出力为多维空间坐标轴,以潮流可行和"N-1"约束为判据,在多维空间中搜索断面传输极限点并形成断面热稳定安全域的边界。该边界刻画了断面功率传输极限随各敏感因素的变化情况,能为运行控制提供更丰富、更准确的运行信息;更进一步分析表明该安全域边界具有较好的超平面近似特性,便于进一步实现安全域的快速计算和讨论安全域在各种优化控制问题中的应用。文中方法已在中国南方某电网运行方式计算中得到应用。
A method is proposed for calculating and analyzing the section thermal limit under the condition of the security“N-1'criterion with the security region in multi-dimensional space taken into account.By calculating each generator”s power transfer distribution factor (PTDF) on section lines,the generators (groups) sensitive to the section thermal limit can be identified.With sensitive generators (groups) output as the axes of multi-dimensional space,the thermal limit points can be obtained under the condition of the security“N-1'criterion.Then the thermal stability security boundary can be formed when those thermal limit points are fitted in the multi-dimensional spaces.The thermal stability security boundary depicts the variation of section thermal limit with each sensitive factor output change and reflects the specific impact of sensitive factors on the section thermal limit.The further analysis shows that the thermal stability security boundary can be better fitted by one or more hyper planes,facilitating development of a fast algorithm for calculating the security region and discussing the application of security region in optimization control problems.The proposed method has been applied to the operation planning of a practical power grid in South China.
出处
《电力系统自动化》
EI
CSCD
北大核心
2014年第12期39-45,共7页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(51207100
51307116)
南方电网科技资助项目(K-ZD2012-006)~~
关键词
热稳定
安全域
功率传输转移分布因子
“N-1”约束
多维空间
thermal limit
security region
power transfer distribution factor
'N-1'criterion
multi-dimension spaces
