基于虚拟阻抗补偿的PMSG恒导纳建模方法
Fixed-admittance Modeling Method of PMSG Based on Compensation of Impedance
史一博 1刘崇茹1
作者信息
- 1. 新能源电力系统国家重点实验室(华北电力大学),北京市 昌平区 102206
- 折叠
摘要
永磁直驱风力发电系统结构复杂、节点数多,在进行电磁暂态实时仿真时,若采用传统建模方法会因系统导纳矩阵计算过于复杂导致仿真规模严重受限.该文提出一种基于虚拟阻抗补偿的永磁同步发电机(permanent magnet synchronous generator,PMSG)恒导纳建模方法,该方法基于传统发电机模型,通过在转子上补偿虚拟阻抗的方式使发电机导纳矩阵固定,并以暂态误差最小为目标,对阻抗参数进行优化设计;再通过结合换流器的伴随离散电路模型,可建立 PMSG 完整恒导纳模型并进行电磁暂态仿真,能够节省大量的计算资源.仿真试验证明,该模型具有较高的仿真精度,并且可以用于 FPGA 等离散化硬件仿真平台上,具有良好的适用性.
Abstract
The permanent magnet generator system has a complex structure and a large number of nodes.In the real-time electromagnetic transient simulation,if the traditional modeling method is used,the calculation of the system admittance matrix will be too complicated,resulting in a serious limitation of the simulation scale.Therefore,this paper proposes a fixed-admittance modeling method of permanent magnet synchronous generator(PMSG)based on virtual impedance compensation.This method is based on the traditional generator model,and the generator admittance matrix is fixed by compensating the virtual impedance on the rotor.The impedance parameters are optimized with the goal of minimizing the transient error.By combining the constant admittance model of voltage source converter,a complete constant admittance model of PMSG can be established and electromagnetic transient simulation can be performed,thus saving a lot of computing resources.Simulation experiments show that the model has high simulation accuracy,and can be used in discrete hardware simulation platforms such as FPGA,with good applicability.
关键词
恒导纳模型/虚拟阻抗补偿/永磁同步电机Key words
fixed-admittance model/compensation of impedance/permanent magnet synchronous generator引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据