摘要
提出了基于特征结构的交直流电力系统电压稳定性分析方法。将特征结构分析法应用于交直流系统的电压稳定性分析,以特征值分解技术为基础,对传统的雅可比矩阵进行降阶处理,利用该矩阵中的元素和直流系统各种参数的关系,求取出交直流系统雅可比矩阵的最小模特征值及其对应的左、右特征向量。通过比较不同负荷水平下的最小模特征值,得到整个交直流系统的电压稳定边界值。通过求出各母线的参与因子来判别系统中最易导致电压失稳的区域。对IEEE-14节点系统运用此方法进行了电压稳定性分析,证明了该方法对于评估交直流系统电压稳定性问题的有效性和正确性。
An eigenvalue method is suggested to analyze volt- age stability of HVAC/DC systems. The Jacobian smallest eigenvalue and the correlative left and right eigenvectors are obtained from HVAC/DC system power flow using Newton method. The participation factors of buses are obtained. According to the participation factors, the voltage stability＇s weak buses are found to analyze the system voltage stability. The converter control mode of HVDC system and its influence on voltage stability are studied. The simulation results of IEEE-14 system demonstrate that when the converter control mode is changed from constant power to constant current, the voltage stability of and that the eigenvalue method power systems is improved, is feasible.
出处
《现代电力》
2007年第2期1-7,共7页
Modern Electric Power
基金
广西自然科学基金资助项目(桂科自0640028)
广西壮族自治区教育厅资助项目
广西壮族自治区研究生教育创新计划资助项目
