基于反应堆堆芯非线性模型的核电机组动态行为分析

Nonlinear Reactor Model-Based Analysis on Dynamic Behavior of Power Grid With Grid-Connected Nuclear Power Generation Unit

针对核电机组接入电力系统后的动态行为进行了研究。在反应堆非线性数学模型的基础上,结合电力系统的数学模型,对系统受扰动后的动态行为进行了分析,所涉及的扰动形式包括反映核电机组对电网影响的反应堆功率调节和机端电压调节以及反映电网对核电机组内部物理过程影响的三相短路及无故障断线。仿真结果表明,该模型和经典理论的结果一致,所提方法能够较准确地描述系统的动态行为,同时还能为系统励磁参数和反应堆控制参数的整定提供参考。

After the nuclear power generation unit is connected to power grid, the dynamic behavior of power grid is researched. Based on the nonlinear mathematical model of the reactor and combining with mathematical model of power grid, dynamic behavior of disturbed power grid is analyzed. Here, the involved disturbances are as following： reactor power regulation and generator terminal-voltage regulation that reflect the impact of nuclear power generating unit on power grid, the three-phase short-circuit and fault-free transmission line breakage that reflect the impacts of power grid on internal physical process inside nuclear power generating unit. Simulation results show that the result from the proposed model conforms to that from classical theory, however the proposed method can describe dynamic behavior of power grid more accurately, besides the proposed method is available for reference in the setting of power gird excitation parameters and in that of reactor control parameters.