基于BPA潮流的电力系统中长期频率电压稳定仿真方法

随着电力系统的复杂化,电力系统中长期动态过程频率电压稳定对系统安全性的影响愈加明显。针对该问题,提出了基于潮流计算的中长期准稳态时域仿真方法。该方法在传统时域仿真方法的基础上综合利用准稳态思想和潮流计算模块,再进一步针对效率问题提出自适应变步长仿真策略和多时步预测辅助方法。所提方法的算法主体部分和潮流计算部分分别在Mathematica科学计算软件和BPA潮流计算功能模块中实现,通过自定义数据接口进行数据对接。通过在Nordic32标准算例系统和某大区电网实际算例系统中对该方法进行验证,表明该方法显著降低实现成本,并提高了仿真计算的效率。

Simulation Method for Mid-long Term Frequency and Voltage Stability of Power System Based on BPA Power Flow Calculation

Along with the complexity of a power system,the effects of the frequency and voltage stability of the power system in the mid-long term dynamic process on the system security are becoming more and more obvious.To solve this problem,a mid-long term quasi-steady-state(QSS)time-domain simulation method based on power flow calculation is proposed.This method comprehensively uses the QSS idea and the power flow calculation module based on the traditional time-domain simulation method.Then,aimed at the problem of efficiency,a self-adaptation variable-step size simulation strategy and a multi-time step prediction auxiliary method are put forward.The main part and the power flow calculation part of the proposed method are implemented in Mathematica scientific calculation software and BPA power flow calculation function module,respectively,and the data connection is performed through a customer data interface.The proposed method is verified through the Nordic32 standard example system and an actual example system of a largescale power grid.Simulation results show that this method significantly reduces the implementation cost and improves the efficiency of simulation calculation.