CAJ | 학술논문

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。
제출일충계급“N-1”약속적다유공간중단면열은정안전역변계적구건화분석방법。해방법수선통과계산계통각발전궤조출력변화대단면선로적공솔전수전이분포인자(PTDF)，학정대단면공솔전수겁한영향현저적민감궤조(궤군)；이민감궤조(궤군)적유공출력위다유공간좌표축，이조류가행화“N-1”약속위판거，재다유공간중수색단면전수겁한점병형성단면열은정안전역적변계。해변계각화료단면공솔전수겁한수각민감인소적변화정황，능위운행공제제공경봉부、경준학적운행신식；경진일보분석표명해안전역변계구유교호적초평면근사특성，편우진일보실현안전역적쾌속계산화토론안전역재각충우화공제문제중적응용。문중방법이재중국남방모전망운행방식계산중득도응용。
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.