Results 271 to 280 of about 72,328 (282)

Estimation of Power Supply Impedance Harmonic Using a Controlled Voltage Disturbance

2001
A novel method for power system impedance estimation is presented. The method employs a power converter to inject a voltage transient onto the supply system. The impedance is estimated through correlation of the measured voltage and current transients. Simulations and experimental results demonstrate the effectiveness of this measurement technique.
MC Di Piazza, B Palethorpe, D W P Thomas, P Zanchetta   +3 more
openaire   +1 more source

Zero-Sequence Voltage Injection-Based Grid Impedance Estimation Method for Three-Phase Four-Wire DC/AC Grid-Connected Inverter

IEEE transactions on industrial electronics (1982. Print)
In this article, a novel method based on zero-sequence voltage injection to estimate grid impedance is proposed. The target of the proposed method is to inject a third harmonic before space vector pulse width modulation in order to generate zero-sequence
Yanqi Cheng, Weimin Wu, Yong Yang, E. Koutroulis, H. Chung, M. Liserre, F. Blaabjerg   +6 more
semanticscholar   +1 more source

A Noninvasive Method to Estimate the Variable Utility Harmonic Impedance

IEEE Transactions on Power Delivery, 2023
Chuan Wang, Fangwei Xu, Qin Shu, Hongru Zheng, Zhiquan Ma, Wei Zhang, Liwu Gong   +6 more
openaire   +1 more source

Estimating the Harmonic Impacts of Multiple Harmonic-Producing Loads Considering Network Impedance Variations

IEEE Transactions on Power Delivery, 2023
Chuan Wang, Fangwei Xu, Quan Zhou, Hongru Zheng, Qin Shu, Lijuan Fan, Hongxin Li, Zhou Liu   +7 more
openaire   +1 more source

Assessing the Variable Harmonic Impedance Based on Bayesian Linear Regression

International Conference on Performance Engineering
The existing approaches for assessing the utility harmonic impedance (UHI) cannot deal with the variable UHI. In fact, there are a variety of factors that may cause variations in UHI, including capacitor switching, filter switching, and operation ...
Chuan Wang, Fangwei Xu, Kai Liu, Hongru Zheng, Kaikai Guo, Qin Shu   +5 more
semanticscholar   +1 more source

Comparative Analysis of Grid Impedance Estimation Methods for Online Stability Control of Renewable Energy

2024 IEEE 8th Conference on Energy Internet and Energy System Integration (EI2)
In the field of grid connected converter (GCC) stability analysis, there are several problems with grid impedance estimation. Firstly, due to time variant of grid network, traditional offline grid impedance measurement can no longer meet the adaptive ...
Lulu Huang, H. Zong, Po Xu, Yiming Wang, Chen Zhang   +4 more
semanticscholar   +1 more source

Multi-SIN Based Real-Time Impedance Estimation for Grid-Tied VSI

2024 Energy Conversion Congress & Expo Europe (ECCE Europe)
The paper proposes a new stimulus for online active and parametric estimation of resistive-inductive grid impedance using a grid-connected inverter. The proposed stimulus is designed with the goal of minimizing invasiveness on the grid, minimizing the ...
Giovanni Marini, A. Lidozzi, M. di Benedetto, L. Solero   +3 more
semanticscholar   +1 more source

Estimation of System Harmonic Impedance using Independent Component Analysis

IEEJ Transactions on Power and Energy, 2013
Suo Lian, Satoshi Takayama, Atsushi Ishigame   +2 more
openaire   +1 more source

Study on the estimation of harmonic impedance based on Bayesian optimized Gaussian process regression

International Journal of Electrical Power & Energy Systems, 2022
Yankun Xia, Wenzhang Tang
semanticscholar   +1 more source

A time-varying harmonic impedance estimation method based on improved BP neural network with attention mechanism

Electric power systems research
Xiang Chen, Ling Yang, Zhaoyang Xu, Difan Zhu, Jiahao Luo, Jiewen Li   +5 more
semanticscholar   +1 more source