直驱风力发电单元的电磁暂态半隐式延迟解耦与仿真方法

Electromagnetic Transient Semi-implicit Latency Decoupling and Simulation Technology for Direct-drive Wind Power Generation Unit

由于现有风电场规模大,所含风机数量多,同时风机自身建模与仿真难度高,因此风电场电磁暂态仿真效率低下。针对以上问题,该文基于半隐式延迟解耦原理提出一种直驱风力发电单元的细粒度解耦与并行仿真方法,以实现直驱风力发电单元高效电磁暂态仿真。首先利用矩阵分裂原理,按照状态变量进行分组,并将直驱风力发电单元分解为多个子系统。采用半隐式延迟解耦方法实现直驱风力发电单元不同状态变量组之间的时间延迟解耦。基于半隐式延迟解耦递推格式,构建了直驱风力发电单元的解耦模型,并分析了该模型的特点,设计了计算时序和流程。实际算例仿真结果表明,该文方法在提高直驱风力发电单元电磁暂态仿真的计算效率的基础上还兼顾了较高的仿真精度。

Due to the large scale of existing wind farms,the number of wind turbines and the difficulty of modeling and simulation of wind turbines,the efficiency of electromagnetic transient simulation(EMT)of wind farms is low.In order to solve the above problems,a fine-grained decoupling and parallel simulation method for direct-drive wind power generation unit was proposed based on the semi-implicit latency decoupling(SILDP)method to realize efficient EMT of direct-drive wind power generation unit.Firstly,based on the matrix splitting principle,the direct-drive wind power generation unit was divided into several subsystems according to the state variables.The SILDP was used to decouple the time delay between different state variables of direct-drive wind power generation unit.Based on the SILDP recursive scheme,the decoupling model of direct-drive wind power generation unit was constructed,the characteristics of the model were analyzed,and the calculation sequence and process were designed.The simulation results showed that the proposed method not only improved the calculation efficiency of EMT of direct-drive wind power generation unit,but also took into account the high simulation accuracy.