中期电压稳定的建模和快速仿真

MODELING AND FASTSIMULATION METHODOFMID-TERM VOLTAGESTABILITY

结合中期电压稳定过程的慢动态的特点，在中期仿真中采用准静态假设，通过求取系统动态发展过程中的一系列暂态平衡点，来描述系统中期的运动轨迹。把对中期电压稳定具有重要影响的发电机、有载调压变压器、负荷作为建模的重点对象，提出了新的步长控制办法，对中期电压稳定的仿真方法进行了探索，并用３ 机１１ 节点系统的算例验证了算法的可行性。

The m ain objective ofthispaperis to explore fastsim ulation m ethod form id-term voltagestability. Sincedynam ics in m id-term voltage stability are slow by nature, quasi-static-state approxim ation is adopted to neglect transient dynam ic details. A fastthough accuratesim ulation m ethod isstudied in w hich system voltageevolution can be found through obtaining a sequence oftransientequilibrium points. The m odeling ofvarioussystem com ponentsthathave greatinfluence to m id-term voltage stability, such as generator, OLTCand load is discussed. A novelm ethod to controlsim ulation step is suggested.