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Your search keyword '"Zhao, Bing"' showing total 2 results
Start Over Author "Zhao, Bing" Topic electric power systems Publication Type Periodicals
2 results on '"Zhao, Bing"'

1. Corrective Control by Line Switching for Relieving Voltage Violations Based on A Three-Stage Methodology.

Author

Shen, Zhengwei, Tang, Yong, Yi, Jun, Chen, Changsheng, Zhao, Bing, and Zhang, Guangru

Subjects
SWITCHING theory, ELECTRIC potential, ELECTRIC power systems, ALTERNATING currents, ACCURACY
Abstract

An online line switching methodology to relieve voltage violations is proposed. This novel online methodology is based on a three-stage strategy, including screening, ranking, and detailed analysis and assessment stages for high speed (online application) and accuracy. The proposed online methodology performs the tasks of rapidly identifying effective candidate lines, ranking the effective candidates, performing detailed analysis of the top ranked candidates, and supplying a set of solutions for the power system. The post-switching power systems, after executing the proposed line switching action, meet the operational and engineering constraints. The results provided by the exact Alternating Current (AC) power flow are used as a benchmark to compare the speed and accuracy of the proposed three-stage methodology. One feature of the methodology is that it can provide a set of high-quality switching solutions from which operators may choose a preferred solution. The effectiveness of the proposed online line switching methodology in providing single-line switching and multiple-line switching solutions to relieve voltage violations is evaluated on the IEEE 39-bus and 2746-bus power system. The CPU time of the proposed methodology compared with that under AC power flow constitutes a speed-up of 9905.32% on a 2746-bus power system, showing good potential for online application in a large-scale power system. [ABSTRACT FROM AUTHOR]

Published
2019
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2. On parameter-dependent Lyapunov functions for robust fault detection filter design with application in power systems

Author

Xu, Shiyun, Tang, Yong, Sun, Huadong, Zhao, Bing, and Chen, Zhan-Ming

Subjects
*LYAPUNOV functions, *FAULT-tolerant computing, *KALMAN filtering, *ELECTRIC power systems, *LINEAR systems, *TIME-varying systems, *POLYTOPES, *PARAMETER estimation
Abstract

Abstract: This study investigates the fault detection problem for uncertain linear time invariant (LTI) systems subject to polytopic uncertainties, exploiting some properties provided by the observer-based robust fault detection filter (RFDF), which has possible applications in practical power systems. By means of parameter-dependent Lyapunov functions, the existence condition of RFDF is assessed through solving a group of linear matrix inequalities (LMIs). In order to further reduce the conservativeness, an efficient algorithm in terms of LMIs by generating homogeneous polynomial parameter-dependent Lyapunov functions of arbitrary degree on the uncertain parameters is presented, which includes as special case existing conditions for RFDF design. It can be established that as the degree of the polynomial increases, the number of LMIs and free variables increases and the test becomes less conservative. Moreover, the fault sensitivity index can be optimized via a convex optimization algorithm, leading to the optimal RFDF. The methodology proposed can also be applied to other relevant aspects such as determining the threshold. An uncertain LTI power system model is adopted as an illustrated example to demonstrate the efficacy of the proposed methods when compared to other methods from the literature. [Copyright &y& Elsevier]

Published
2012
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