| 引用本文: | 周成虎,唐征宇,黄全振,等.非接触功率传输系统超低压软启动方法建模研究[J].电力系统保护与控制,2024,52(19):108-118.[点击复制] |
| ZHOU Chenghu,TANG Zhengyu,HUANG Quanzhen,et al.Modeling an ultra low voltage soft start method for a contactless power transmission system[J].Power System Protection and Control,2024,52(19):108-118[点击复制] |
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| 摘要: |
| 在直接启动非接触传输系统的过程中，电源输入功率、电流的峰值可达稳态值数倍至数百倍，且变换器开关管易出现单次硬开关现象，导致开关管老化甚至击穿。针对该问题，以三相LCC非接触功率传输系统为研究对象，推导出其等效电路对应微分方程的奇次解和非奇次方程特解及完全解，根据奇次解与电源激励无直接关联且决定暂态特性的结论，提出超低电压的软启动方法。分析表明：软启动方法的理论基础是微分方程的零输入响应和零状态响应具有可分解特性；用数学建模和仿真验证了软启动能降低系统的零输入响应峰值；用电路仿真验证了软启动能有效避免开关管出现单次硬开关的现象；在电路运行过程中如果电源短时断电，且驱动电路因内部储能而持续工作，则要使用软启动方法重新启动，以避免直接启动引起的冲击效应；提出了初始变化率的近似计算方法，得出了初值与电源激励有关的结论。实验证明了上述结论的正确性。 |
| 关键词: 非接触功率传输 数学模型 软启动 |
| DOI：10.19783/j.cnki.pspc.231510 |
| 投稿时间：2023-12-28修订日期：2024-07-22 |
| 基金项目:国家自然科学基金面上项目资助(62173126)；中原科技创新领军人才支持计划(234200510027)；河南省科技攻关计划项目资助(242102240099) |
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| Modeling an ultra low voltage soft start method for a contactless power transmission system |
| ZHOU Chenghu1,TANG Zhengyu2,HUANG Quanzhen1,ZHANG Yang1,ZHANG Laomo3 |
| (1. School of Electrical Information Engineering, Henan University of Engineering, Zhengzhou 451191, China;
2. China Mobile Group Henan Co., Ltd. Port Area Branch, Zhengzhou 450000, China; 3. College of Software,
Henan University of Engineering, Zhengzhou 451191, China) |
| Abstract: |
| In the process of directly starting a contactless transmission system, the peak power and current of the power input can reach several to hundreds of times the steady-state value. The converter switching tube is prone to a single hard switching phenomenon, leading to aging or even breakdown of the switching tube. In response to this problem, a three-phase LCC contactless power transmission system is taken as the research object. The homogeneous solution and inhomogeneous equation special solution, and complete solution of its equivalent circuit corresponding to the differential equation are derived. Given that the homogeneous solution is not directly related to the power source excitation and determines the transient characteristics, an ultra-low voltage soft start method is proposed. Analysis shows that: the theoretical basis of the soft start method is that the zero input response and zero state response of the differential equation have decomposable characteristics; mathematical modeling and simulation are used to verify that soft start can reduce the peak zero input response of the system; the circuit simulation verifies that soft start can effectively avoid the phenomenon of a single hard switch in the switching tube; if the power supply is cut off for a short time during the operation of the circuit and the driving circuit continues to work because of internal energy storage, a soft start method should be used to restart to avoid the impact caused by direct starting; an approximate calculation method for the initial rate of change is proposed, and the conclusion is that the initial value is related to power excitation. The experiment has proved the correctness of the above conclusion. |
| Key words: contactless power transmission mathematical model soft start |
