Abstract：Currently, fault predictions of power electronic circuit mostly focus on components, and seldom consider the influences of working conditions such as electric network and load fluctuation. An innovative metric only related to the circuit fault for power electronic circuit failure evaluation, named relative shift of fault feature parameter, and a novel method of power electronic circuit fault prediction based on least squares support vector machine(LSSVM) are proposed according to this problem. Working condition time series and circuit parameters time series are predicted based on LSSVM. And then circuit parameters are calculated as the circuit under the predicted working condition is healthy. Thus, the failure evaluation metric is calculated based on the predicted circuit parameters and healthy circuit parameters under same working condition and the future circuit state can be judged finally. Simulation studies on Buck circuit show that the proposed method is feasible and effective.
姜媛媛, 王友仁, 罗慧, 林华, 崔江. 电力电子电路故障评估新指标及基于LSSVM的预测新方法[J]. 电工技术学报, 2012, 27(12): 43-50.
Jiang Yuanyuan, Wang Youren, Luo Hui, Lin Hua, Cui Jiang. An Innovative Metric for Power Electronic Circuit Failure Evaluation and a Novel Prediction Method Based on LSSVM. Transactions of China Electrotechnical Society, 2012, 27(12): 43-50.
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2012, Vol. 27 
