| 引用本文: |
文武松1，王璐2，金丽萍1，杨贵恒1，申新楼3，张颖超1.共高频母线多端口电力电子变压器启动及预充电控制策略[J].陆军工程大学,2023,(1):36-44
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| 共高频母线多端口电力电子变压器启动及预充电控制策略 |
| 文武松1，王璐2，金丽萍1，杨贵恒1，申新楼3，张颖超1 |
| (1.陆军工程大学 通信士官学校，重庆 400035;
2.重庆第二师范学院 数学与信息工程学院，重庆 400065;3.66072部队，北京 100144) |
| 摘要:共高频母线电力电子变压器(high-frequency-bus-based power electronic transformer，HFB-PET)的内部电磁耦合关系复杂、各端口工作模式灵活多样，必须采用性能优越、适应性强的控制策略确保其功能单元有序上电和正常启动。现有启动策略一般针对共直流母线PET而设计，对其预充电过程缺少数学建模，在实际应用中面临不确定性且很难直接推广应用于多端口HFB-PET。在不改变HFB-PET主电路拓扑的前提下，通过设置启动优先级和“主电源”端口的方式设计了一套分步启动流程，适用于HFB-PET的任意工况。另外，还设计了一种基于占空比递增的预充电策略，并对初始占空比和占空比增量进行了数学描述，为预充电控制的实施提供了理论支撑。最后通过仿真和实验验证了所提启动及预充电策略的有效性。所提控制方法无需新增额外设备且不影响HFB-PET的稳态特性，具备无浪涌电流、工况适应性强等优势。 |
| 关键词: 电力电子变压器 高频母线 启动策略 占空比递增 |
| DOI：10.12018/j .issn.2097-0730.20220122001 |
| 投稿时间：2022-01-22 |
| 基金项目:重庆市自然科学基金面上项目(CSTB2022NSCQ MSX1396)；军内科研项目(KYCQJQZL2119) |
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| Start-Up and Pre-charging Control Strategy for Multi-port High-Frequency-Bus-Based Power Electronic Transformer |
| WEN Wusong1，WANG Lu2，JIN Liping1，YANG Guiheng1，SHEN Xinlou3，ZHANG Yingchao1 |
| (1.Communications NCO Academy，Army Engineering University of PLA，Chongqing 400035，China;
2.School of Mathematics and Information Engineering，Chongqing University of Education，Chongqing 400065，China;
3.Unit 66072 of PLA，Beijing 100144，China) |
| Abstract: For a high-frequency-bus-based power electronic transformer (HFB-PET), the electromagnetic coupling relationship between its internal modules is very complex, and the working mode of each port often needs to be flexibly changed according to the externally connected power supply or load. Therefore, a control strategy with superior performance and strong adaptability must be adopted to ensure the orderly power-on and normal start-up of its functional units. Existing start-up strategies are generally designed for direct-current-bus-based PET, which lacks the mathematical modeling for pre-charging process, usually faces uncertainty in practical applications, and is also difficult to be directly applied to multi-port HFB-PET. Without changing the topology of the main power-circuit of HFB-PET, this paper designs a step-by-step start-up process by setting the start-up priorities and the "main power" port so as to adapt itself to any operating condition of HFB-PET. In addition, a pre-charging strategy based on gradually increasing duty-cycle is designed, and the initial duty-cycle and the duty-cycle increment are mathematically described to provide theoretical support for the implementation of pre-charging control. Finally, the effectiveness of the proposed start-up and pre-charging strategy are verified by the simulations and experiments. With the advantages of no surge current and strong adaptability to operating conditions, the control strategy proposed in this paper does not require additional equipment and will not affect the steady-state characteristics of HFB-PET. |
| Key words: power electronic transformer (PET) high-frequency-bus start-up strategy duty-cycle increment |
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