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19 results on '"Song, Wenchao"'

9. Power System State Estimation Based on PMU Under Linear Bayesian Theory

Author

Chao Lu, Song Wenchao, Shujun Zhang, Chengzhi Zhu, and Junjie Lin

Subjects
Electric power system, Bayes estimator, Observational error, Computer science, Control theory, Bayesian probability, Measurement uncertainty, Probability density function, Least squares, Phasor measurement unit
Abstract

With the rapid changes in the actual power system operation mode, power system wide area real time state estimation based on phasor measurement unit (PMU) plays an increasingly important role in energy management system (EMS). However, complex distribution characteristics of PMU measurement error pose challenges to the accuracy of state estimation. Therefore, a state estimation method combining PMU linear measurement model and linear Bayesian estimation is proposed. Considering the prior information of estimated parameters and the complex probability density function of measurement error, linear Bayesian estimation is applied to power system state estimation based on PMU. The correlation between real measurement error and imaginary measurement error is analyzed, and the prior information of estimated parameters is obtained according to the analysis of system state volatility. Compared with complex number least squares (CLS) method, the applicability and accuracy of this method were verified in IEEE 39 bus system.

Published
2021

12. Design of a smooth-walled horn for satellite communication in c-band

Author

Liang Ruixiang, Zhang Zhenhua, Song Wenchao, Wang Hu, and Gong Qi

Subjects
Physics, Optics, business.industry, C band, Cross polarization, Bandwidth (signal processing), Communications satellite, Antenna radiation, business
Abstract

Corrugated horn is often preferred due to having low cross polarization over a very wide bandwidth in C-band satellite communication, but the corrugated horn is challenging to fabricate and weight. Therefore, a novel smooth-walled horn is proposed in this paper. The horn has low cross-polarization (

Published
2017

19. STATCOM ETO Failure Analysis

Author

Du, Zhong, primary, Chen, Bin, additional, Han, Chong, additional, Yang, Zhaoning, additional, Song, Wenchao, additional, Bhattacharya, Subhashish, additional, and Huang, Alex Q., additional

Published
2006
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