# Improved Dynamic Performance of Average-Value Modelled Active Front-End Rectifiers

## Abstract

**:**

## 1. Introduction

- Practical SEM, SAVM, and IAVM simulation models are built for the AFE rectifiers;
- The AFE rectifiers are initialized in proper ways to implement the startup procedure in the absence of command control signals;
- The inrush current is limited during the startup period using a pre-charge circuit;
- A robust closed-loop control strategy is proposed to keep the unity power factor;
- The dead-time impact on the rectifier is improved by the proposed advanced AVM;
- The effect of switching devices’ voltage drop is accurately considered in the models;
- The operations of the models are compared to validate the accuracy of the proposed IAVM performance.

## 2. AFE Rectifier Models

#### 2.1. Switched (PWM) Model

#### 2.2. Dynamic Average-Value Model

## 3. Proposed Improved AVM

#### 3.1. Enhanced Dead-Time Distortion Model

#### 3.2. Improved Startup Procedure

## 4. Results

#### 4.1. Case 1: Startup Performance

#### 4.2. Case 2: Load Responses

#### 4.3. Case 3: Transient Performance

## 5. Conclusions

## Funding

## Data Availability Statement

## Acknowledgments

## Conflicts of Interest

## References

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**Figure 2.**Dynamic SAVM for the AFE rectifier with VOC. (

**a**) Overall rectifier configuration. (

**b**) Block diagram of the dynamic structure.

**Figure 6.**AFE rectifier no-load startup waveforms for the SEM, SAVM, and IAVM based on the proposed startup procedure. (

**a**) Rectifier DC link voltage; (

**b**) AC-side currents; (

**c**) D-q currents.

**Figure 7.**No-load startup procedure waveforms for the IAVM baseline: (

**a**) AC-side A-phase currents; (

**b**) D-q currents.

**Figure 8.**Load responses of AFE rectifier for the SEM, SAVM, and IAVM baselines: (

**a**) AC-side currents for 3.6 kW load; (

**b**) AC-side currents for 7.2 kW load; (

**c**) D–q currents during 3.6 kW load; (

**d**) D–q currents during 7.2 kW load.

**Figure 9.**AFE rectifier transient waveforms for the SEM and IAVM based on the VOC technique: (

**a**) Rectifier DC link voltage; (

**b**) AC-side A-phase current; (

**c**) Load current; (

**d**) D-q currents.

AFE Parameters | ||||||
---|---|---|---|---|---|---|

IGBT Module | V_{dc} [V] | V_{f} (IGBT || D) [V] | r_{S} || r_{D} [mΩ] | C_{dc} [mF] | T_{sw} [s] | t_{d} [s] |

Fs400R07A1E3 | 600 | 1.5 | 1 | 4.7 | 1 × 10^{−4} | 2 × 10^{−6} |

Ac Side Parameters | ||||||

V_{grid} (L-L) [V_{rms}] | F_{s} [Hz] | L_{s} [mH] | C_{s} [μF] | V_{out} [V] | ||

380 | 50 | 10 | 5 | 600 | ||

Controller Gains | ||||||

DC voltage controller | K_{p} = 2.6 || K_{i} = 20.8 | |||||

d-axis current controller | K_{p} = 31.72 || K_{i} = 157.44 | |||||

q-axis current controller | K_{p} = 31.72 || K_{i} = 157.44 |

AFE Rectifier Model | SEM | SAVM | IAVM |
---|---|---|---|

THD% for 3.6 kW load | 5.14 | 4.96 | 4.78 |

THD% for 7.2 kW load | 2.55 | 2.78 | 2.5 |

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**MDPI and ACS Style**

Ebadpour, M.
Improved Dynamic Performance of Average-Value Modelled Active Front-End Rectifiers. *Electronics* **2024**, *13*, 445.
https://doi.org/10.3390/electronics13020445

**AMA Style**

Ebadpour M.
Improved Dynamic Performance of Average-Value Modelled Active Front-End Rectifiers. *Electronics*. 2024; 13(2):445.
https://doi.org/10.3390/electronics13020445

**Chicago/Turabian Style**

Ebadpour, Mohsen.
2024. "Improved Dynamic Performance of Average-Value Modelled Active Front-End Rectifiers" *Electronics* 13, no. 2: 445.
https://doi.org/10.3390/electronics13020445