摘要
为了解决电网机电暂态仿真中利用高阶发电机实用模型和梯形法而引起的机网方程"维数灾"和迭代求解问题,基于戴维南等值原理,利用梯形积分法建立了线性发电机组的离散时域d-q轴和x-y轴戴维南等值模型.使得在仿真中发电机可以选择高阶实用模型,而不影响机网方程的维数.该模型在一段时间内与原发电机组模型等值,而非一个积分步长,从而减少了修正模型的计算量.功角计算取决于相应变量的过去时间值,从而解决了利用梯形法求解机网方程所造成的迭代求解问题.仿真结果表明,模型具有较高的仿真精度和数值计算稳定性.
In order to solve the dimension disaster of simulation equation caused by high order generator utility model and the trapezoidal method for power system transient simulation and the problem of iterative solution for equations between generators and network, a discrete time-domain d-q axis and x-y axis of Thevenin＇s dynamic equivalent model is established using trapezoidal integration method on the bases of the Thevenin equivalent princi- ple. A more accurate generator model for simulation should be chosen to avoid affecting the simulation equation di- mension. The model, over a period of time, is equivalent to the generator model instead of an integration step, thereby reducing the computation of modifying model. The value of power angle depends on the corresponding variables＇ values in the past time, which consequently solves the problems caused by the use of iterative solution of trapezoidal method for solving machine network equations. The simulation results show that, the model has a high simulation precision and stability.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2016年第1期62-65,共4页
Journal of Harbin University of Science and Technology
关键词
机电暂态仿真
戴维南等值模型
同步发电机组
数值仿真
transient simulation
thevenin equivalent model
synchronous generator
digital simulation
