摘要
对于含大量电力电子设备的电力系统,传统的电磁暂态实时仿真器难以实现小步长仿真,针对该问题,采用了一种基于现场可编程门阵列(field programmable gate array, FPGA)和CPU的电力系统混合步长实时仿真方法,搭建了电力系统暂态实时仿真器。以光伏发电系统为例,利用模型分割方法将系统分割为大步长部分与小步长部分,通过以太网实现FPGA与CPU异步通信,形成大步长—小步长混合步长联合仿真平台。针对模型分割后系统数据交互产生的误差问题,提出了一种脉冲等效平均化方法来对逆变器交流侧输出电压进行等效,以此降低误差和FPGA硬件资源占用率。最后,将实时仿真结果与Simulink离线模型和优化前的模型仿真结果比较,验证了在保证仿真精度的前提下,该方法在降低资源占用率方面具有一定的优势。
For the power system with a large number of power electronic equipment, it is difficult for the traditional electromagnetic transient real-time simulator to realize the small step length simulation. To solve this problem, a hybrid step length real-time simulation method based on field programmable gate array(FPGA) and CPU is adopted to build a transient real-time simulator for power system. Taking photovoltaic power generation system as an example, the system is divided into large step part and small step part by model segmentation method, and asynchronous communication between FPGA and CPU is realized through Ethernet, forming a large step length and small step length hybrid co-simulation platform. Aiming at the error caused by system data interaction after model segmentation, a pulse equivalent averaging method is proposed to equivalent the output voltage of inverter at AC side, so as to reduce the error and FPGA hardware resource occupancy rate. Finally, the real-time simulation results are compared with the simulation results of Simulink offline model and the model before optimization, and it is verified that the proposed method has certain advantages in reducing the resource occupancy under the premise of ensuring the simulation accuracy.
作者
郑荣波
郝正航
陈卓
ZHENG Rongbo;HAO Zhenghang;CHEN Zhuo(The Electrical Engineering College,Guizhou University,Guiyang 550025,China)
出处
《南方电网技术》
CSCD
北大核心
2022年第10期12-19,共8页
Southern Power System Technology
基金
第二批国家级新工科研究与实践项目(E-NYDQHGC 20202227)。
关键词
现场可编程门阵列
实时仿真
混合步长仿真
光伏发电系统
模型分割
field programmable gate array
real-time simulation
hybrid step length simulation
photovoltaic power generation system
model segmentation
