CAJ | 학술논문

电力系统静态电压稳定裕度灵敏度是电压稳定分析与控制的关键技术之一。目前广泛采用的负荷裕度灵敏度计算方法依赖于鞍结分岔点雅可比零特征值左特征向量。鞍结分岔点雅可比零特征值左特征向量需要计算2(n?1)个线性方程。如果控制变量个数较少，计算效率较低。提出了一种不需要鞍结分岔点雅可比零特征值左特征向量的负荷裕度灵敏度计算方法。在灵敏度自适应引导求取负荷裕度的最后一步，利用局部曲线拟合及相关高阶灵敏度技术，对弱节点分析得到了负荷裕度与控制参数的灵敏度。多个IEEE测试系统和湖南电网的数值计算结果表明，所提方法有效且实用。
전력계통정태전압은정유도령민도시전압은정분석여공제적관건기술지일。목전엄범채용적부하유도령민도계산방법의뢰우안결분차점아가비령특정치좌특정향량。안결분차점아가비령특정치좌특정향량수요계산2(n?1)개선성방정。여과공제변량개수교소，계산효솔교저。제출료일충불수요안결분차점아가비령특정치좌특정향량적부하유도령민도계산방법。재령민도자괄응인도구취부하유도적최후일보，이용국부곡선의합급상관고계령민도기술，대약절점분석득도료부하유도여공제삼수적령민도。다개IEEE측시계통화호남전망적수치계산결과표명，소제방법유효차실용。
The system load margin sensitivity with respect to any control parameter is very important to the system security analysis and control. Currently, the load margin sensitivity calculation is mainly based on the left vector of the zero eigenvalue of the Jacobean matrix at the saddle node bifurcation (SNB). However the method requires the solution of 2(n?1) linear equations. If the control variables are not too many, the calculation efficiency is very low. A method to calculate the load margin sensitivity without the left vector was proposed in this paper. At the last step of searching SNB by sensitivity guidance approach, using the local curve fitting technique and the related higher order sensitivity of the weak bus voltage, the system load margin sensitivity was obtained. Case studies for IEEE systems and Hunan system indicate that the proposed method is effective and feasible.