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Cheng Xingxin - IEEE Xplore Author Profile

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In order to make up for the lack of UPFC protection system in fault diagnosis and early warning, a new UPFC fault diagnosis method based on wavelet packet energy and OVO SVM has been proposed. During the simulation, the signals of DC side capacitor voltage of the UPFC model in the states of normal and 4 shunt valve side internal fault are collected. The wavelet packet analysis is used to decompose...Show More
At present, the way of dealing with UPFC faults in the power grid is accomplished by relay protection. As the protection equipment removes the entire UPFC system when the UPFC fails, the maintenance personnel cannot get the fault information. In response to the problem of long fault time and low reliability, a fault diagnosis method is proposed in this paper. After processed for twice, the UPFC DC...Show More
In construction of super-long highway tunnel, because adopted some new construction method, such as center bore method, quota of it was very difficult. By BP neural network, a new quota-making method of super-long highway tunnel was put forward. Through a great many of training of data samples, quota is more related with actual consumption and it can be dynamically adjusted. The method was success...Show More