浙江电力

2021, v.40;No.298(02) 45-49

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基于非同步dq坐标变换的电压暂降快速检测方法
A Fast Detection Method of Voltage Sag Based on Asynchronous dq Coordinate Transformation

郭建龙,刘善伟,刘文泽,吕梁景
GUO Jianlong,LIU Shanwei,LIU Wenze,LYU Liangjing

摘要(Abstract):

针对现有电压暂降检测算法高度依赖同步采样、检测计算量大、易受干扰影响等问题,设计了一种基于非同步dq坐标变换的电压暂降快速检测方法。首先,通过电压坐标变换检测电压暂降的主要特征量,包括幅值、持续时间、相位跳变等,可摆脱传统方法对同步采样的依赖;其次,采用参数自适应设计,对噪声、频率偏移、幅值波动的影响进行滤波,从而达到提高检测精度的设计目的。最后,通过算例比较和分析验证了所提方法的有效性。
The existing voltage sag detection method is characterized by highly reliance on synchronous sampling, large amount of detection calculation and being apt to interference. A fast detection method of voltage sag based on asynchronous dq coordinate transformation is designed. Firstly, the main characteristics of voltage sag, such as amplitude, duration and phase jump are detected by voltage coordinate transformation to break away from the reliance on synchronous sampling in the traditional method; secondly, parameter adaptive design is adopted to filter the influence of noise, frequency offset and amplitude fluctuation to improve the detection accuracy. Finally, The effectiveness of the method proposed in this paper is verified by comparison and analysis of numerical examples.

关键词(KeyWords): 电压暂降;滑动平均滤波器;dq坐标变换
voltage sag;moving average filter;dq coordinate transformation

Abstract:

Keywords:

基金项目(Foundation): 广东电网有限责任公司科技项目(GDKJXM20185538)

作者(Author): 郭建龙,刘善伟,刘文泽,吕梁景
GUO Jianlong,LIU Shanwei,LIU Wenze,LYU Liangjing

DOI: 10.19585/j.zjdl.202102008

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