# 基于高阶神经网络的电力变换器滤波故障诊断方法设计Design of Filtering Fault Diagnosis Method for Power Converter Based on High-Order Neural Network

DOI: 10.12677/AIRR.2019.82011, PDF, HTML, XML, 下载: 452  浏览: 714

Abstract: A fault diagnosis method for power converter based on high-order neural network algorithm is proposed. Taking the fault diagnosis in Buck converter as an example, a diagnostic structure for high-order neural network is designed. And taking the voltage and current values of Buck converter at different working conditions under the condition of continuous current as samples, the high-order neural network is trained to realize the fault diagnosis of Buck converter.

1. 引言

2. 模型建立

Figure 1. The equivalent schematic diagram of the Buck converter

Figure 2. The Simulink model of the Buck converter

Table 1. The parameters of the Buck converter

Figure 3. The inductance current curve of the Buck converter

Figure 4. The output voltage curve of the Buck converter

3. 基于高阶神经网络的故障诊断

Table 2. The correspondence between the operating condition and the HONN output

${h}_{j}\left(k\right)=f\left(\underset{i=1}{\overset{2}{\sum }}{w}_{ji}\left(k\right){x}_{i}\left(k\right)\right)$ (1)

Figure 5. The structure chart of the HONN

${y}_{M}\left(k\right)=g\left(\underset{j=1}{\overset{2}{\prod }}{\xi }_{Mj}\left(k\right){h}_{j}\left(k\right)\right)$ (2)

${y}_{M}\left(k\right)=g\left(\underset{j=1}{\overset{2}{\prod }}{\xi }_{Mj}\left(k\right)f\left(\underset{i=1}{\overset{2}{\sum }}{w}_{ji}\left(k\right){x}_{i}\left(k\right)\right)\right)$ (3)

${w}_{ji}\left(k+1\right)={w}_{ji}\left(k\right)-\eta \frac{\partial E\left(k\right)}{\partial {w}_{ji}\left(k\right)}$ (4)

${\xi }_{Mj}\left(k+1\right)={\xi }_{Mj}\left(k\right)-\eta \frac{\partial E\left(k\right)}{\partial {\xi }_{Mj}\left(k\right)}$ (5)

$E\left(k\right)=\frac{1}{2}\underset{M=1}{\overset{3}{\sum }}{\left({\stackrel{¯}{y}}_{M}\left(k\right)-{y}_{M}\left(k\right)\right)}^{2}$ (6)

Figure 6. The fault diagnosis flow chart of the HONN

4. 结论

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