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| Content Provider | IET Digital Library |
|---|---|
| Author | Liu, Yibing Liang, Deliang Zhang, Mingkang Liang, Yang Chen, Qixu Wang, Qingshan |
| Abstract | Hybrid distribution transformer (HDT) is an integrated system of the conventional distribution transformer and the PWM converters, which can greatly enhance the controllability of the conventional distribution transformer and is important for the intelligence of the future distribution network, since HDT can support the AC–DC power network and control the voltage and current in real time. However, the impact current, over voltage, and saturation will lead to the start-up failure when an incorrect start-up scheme is adopted in HDT. Therefore, it is significant to design a reliable start-up scheme to guarantee a safe operation for HDT. Here, a three-phase circuit scheme and the control system of HDT are proposed. Then, a soft start-up scheme that can realise the constant-current charging for the DC bus capacitor is proposed. Specifically, the soft start-up scheme is based on the following measures, bypassing the DC-bus current-limiting resistors when the voltage of DC-bus capacitor exceeds the threshold, limiting the output of PI controllers during the start-up, separating the integral coefficient according to the DC-bus voltage error. Finally, the proposed start-up scheme is verified in MATLAB, which lays the foundation for the optimal design of the start-up scheme of HDT. |
| Starting Page | 1958 |
| Ending Page | 1961 |
| Page Count | 4 |
| Volume Number | 2019 |
| e-ISSN | 20513305 |
| Issue Number | Issue 16, Mar (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/conferences/cn-adc-2018 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8689 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2018-10-24 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) |
| Subject Keyword | AC–DC Power Network Constant-current Charging Control of Electric Power System Controllability Current Control DC-bus Capacitor DC-bus Current-limiting Resistors DC-bus Voltage Error Distribution Network Electric Current Control HDT Hybrid Distribution Transformer Integral Coefficient PI Control PI Controller Power Capacitor Power Converter Power Supplies to Apparatus Power Transformer PWM Converter PWM Power Converter Soft Start-up Scheme Start-up Failure Three-phase Circuit Scheme Transformer And Reactors Voltage Control |
| Content Type | Text |
| Resource Type | Article |
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