【摘要】 提出了基于注入电流模型和节点功率平衡模型的中长期电压稳定准稳态时域轨迹追踪仿真方法,中长期电压稳定的动态过程相对暂态过程较慢,准稳态近似通过忽略暂态过程获得一系列的暂态平衡点来追踪电压变化过程。研究了处理元件极限的方法和更新雅可比矩阵的原则,比较了基于不同网络模型的2种准稳态仿真方法的优势、计算效率和适用范围。实际电力系统的仿真算例验证了上述方法的有效性和正确性,结果表明上述方法在电力系统离线和在线分析中具有很好的应用前景。更多还原

【Abstract】 A fast time domain simulation method for medium-and long term voltage stability based on quasi steady state(QSS)assumption is researched.Since the dynamic process of medium and long term voltage stability is slower in relation to transient process,so by means of neglecting transient dynamics details a series of transient equilibrium points can by obtained to trace voltage variation process by QSS approximation.The authors propose two QSS simulation algorithms based on different network models,i.e.,injection current balance model based on conductance matrix and node power balance model;research the principle and method to deal with device limits and update Jacobian matrix;and compare respective superiority,calculation efficiency and applying range of the two algorithms.The effectiveness and corretness of the proposed algorithms is verified by simulation examples of actual power grids.And the simulation results show that the proposed algorithms possess good application prospect in on-line and off-line analysis of power grid.更多还原