基于FPGA实时检测负序电压和负序电流的方法  

FPGA-based Real-time Detection of Negative Sequence Voltage and Current Components

作　　者：胡小山 胡尔峰 孙新志 钟荣祥 叶志华 HU Xiaoshan;HU Erfeng;SUN Xinzhi;ZHONG Rongxiang;YE Zhihua(Guangzhou Kinte Industrial Co.,Ltd.,Guangzhou 510860,China)

机构地区：[1]广州擎天实业有限公司,广东广州510860

出　　处：《电工技术》2024年第12期116-119,共4页Electric Engineering

摘　　要：深入研究了三相电网在不对称故障时负序分量的实时检测问题,针对传统检测方法实时性不足和扩展性受限的问题,提出了一种基于现场可编程门阵列(FPGA)的解决方案。该方案利用FPGA的并行处理能力和实时数据处理能力,结合DFT算法,实现了在极短时间(5μs)内精确计算负序分量的目标,误差控制在±0.2%以内。该方案不仅提高了负序分量检测的实时性和准确性,还为三相电网的故障诊断、保护和控制提供了有力支持。This paper studies real-time detection of negative sequence components in three-phase power grids encountering asymmetric faults.Aiming at addressing insufficient real-time performance and limited expandability of conventional detection methods,a solution based on field-programmable gate array(FPGA)is proposed.This solution,which utilizes parallel processing capabilities and real-time data processing capabilities of FPGA and combines FGPA with DFT algorithm,has been indicated capable of achieving accurate calculation of negative sequence components in an extremely short duration(5μs)with a deviation controlled within ±0.2%.This solution may facilitate not only improvements in real-time performance and accuracy of negative sequence component detection,but also effective fault diagnosis,protection,and control of three-phase grids.

关 键 词：电力系统 FPGA 正序分量 负序分量 零序分量 离散傅里叶变换 

分 类 号：TM732[电气工程—电力系统及自动化]