山东大学电气工程学院
纸质出版:2025
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曲以凡, 靳宗帅, 张恒旭, 等. 基于改进离散傅里叶变换的抗衰减直流分量强鲁棒性相量估计算法[J]. 中国电机工程学报, 2025,(14):5456-5467.
曲以凡, 靳宗帅, 张恒旭, 等. 基于改进离散傅里叶变换的抗衰减直流分量强鲁棒性相量估计算法[J]. 中国电机工程学报, 2025,(14):5456-5467. DOI: 10.13334/j.0258-8013.pcsee.232850.
工频同步相量是支撑电力系统分析、保护和稳定控制的基本信息,不同场景对其估计精度与速度要求日益严格。短路故障初期,工频分量、衰减直流分量(decaying DC component
DDC)以及谐波之间频域混叠,导致工频相量准确估计面临严峻挑战。针对多种干扰影响相量测量精度问题,提出一种基于改进离散傅里叶变换的强鲁棒性相量估计算法。首先,对DDC误差原理进行分析,利用多个1/4波离散傅里叶变换(discrete Fourier transform
DFT)计算频域误差,同时引入放大乘子以提升算法鲁棒性;然后,在改进DFT基础上提出算法计算量精简方法,将算法计算效率提升近一倍;最后,构建二次谐波陷波滤波器配合所提算法,弥补了二次谐波难以滤除的缺陷。算例测试表明,所提算法不受DDC参数与采样频率限制,并在多种干扰下表现出良好的抗干扰能力,同时有效缩短了相量估计的暂态时间。
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Parpaei Mohammad,Abyaneh Hossein Askarian,Razavi Farzad.An innovative method to eliminate multiple exponentially decaying DC components based on the discrete Fourier transform in the numerical distance relay[J].IET Generation, Transmission & Distribution,2022.
Afrandideh Saeed,Haghjoo Farhad.A DFT-based phasor estimation method robust to primary and secondary decaying DC components[J].Electric Power Systems Research,2022.
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Pazoki Mohammad.A New DC-Offset Removal Method for Distance-Relaying Application Using Intrinsic Time-Scale Decomposition[J].IEEE Transactions on Power Delivery,2018.
Jafarpisheh Babak,Madani Seyed M.,Parvaresh Farzad.Phasor Estimation Algorithm Based on Complex Frequency Filters for Digital Relaying[J].IEEE Transactions on Instrumentation and Measurement,2018.
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