水力系统与电力系统相互影响研究

针对目前水力系统、机械系统及电力系统都被独立地研究而有可能会使它们之间的相互影响被简化的现状，以单机无穷大系统为例．给出了适用于小干扰分析的4种水力系统（恒定机械功率、简化水力系统、弹性水击下的线性水轮机及刚性水击下的线性水轮机）模型。以及3种电力系统模型（恒定电功率、不计及励磁调节器和计及励磁调节器的发电机）模型。分析比较了不同水力系统模型对电力系统振荡的影响．以及不同电力系统模型对水力系统振荡的影响。对单机无穷大系统进行仿真．结果表明了水力系统与电力系统之间相互存在影响．并指出要重视系统之间的协调研究工作。

Research on interactions between hydraulic system and power system

Hydraulic system,mechanical system and power system are currently studied separately,which causes the interactions among the three systems simplified improperly. With a single-machine infinite-bus system as an example,four different hydraulic system models(constant mechanical power model,simplified system model,elastic hydraulic system model and rigid hydraulic model) and three different power models(constant electrical power system model,generator models with and without excitation regulator) are presented for small disturbance analysis. The influence of different hydraulic system models on power oscillation and different power system models on hydraulic system oscillation are studied. Simulations show that interactions between hydraulic system and power system do exist,and the corresponding cooperation study is necessary.