单相PWM整流器最大带载能力分析

发布时间：2018-05-02 06:49

本文选题：动态电压恢复器(DVR) + PWM整流器　；参考：《电网技术》2017年01期

【摘要】：PWM整流器的带载能力是动态电压恢复器在不同电压补偿深度下直流侧电压稳定的关键。针对PWM整流器带重载时直流侧电压不稳定的现象,定性分析了直流侧电压稳定与其带载能力的关系,得出了定参数下最大跟踪电流值以及直流侧电压与各参数量的关系,揭示了直流侧电容电压随电路参数变化的原理,并建立了单相PWM整流器带载能力数学模型;然后通过分析功率平衡与带载能力的关系得出逆变基波电压相位滞后电网电压相位的范围,利用该方法分析单相PWM整流器带载能力与基于直流侧电压稳定分析的结果一致;最后探讨了直流侧电容电压二次纹波对单相PWM整流器带载能力的影响,提出了通过调节电压外环比例系数改善其带载能力的方法。仿真和实验结果验证了上述理论分析的正确性。
[Abstract]:The load capacity of the PWM rectifier is the key to the DC side voltage stability of the dynamic voltage restorer at different voltage compensation depth. The relationship between DC side voltage stability and its load capacity is qualitatively analyzed for the DC side voltage instability when the PWM rectifier with heavy load, and the maximum tracking current value and DC side under the fixed parameters are obtained. The relation between the voltage and the parameter quantity reveals the principle that the capacitance voltage of the DC side varies with the circuit parameters, and establishes the mathematical model of the single phase PWM Rectifier's carrying capacity. Then by analyzing the relationship between the power balance and the load capacity, the voltage phase range of the inverter basic wave voltage phase lag is obtained, and the method is used to analyze the single-phase PWM whole. The carrying capacity of the flow device is in agreement with the results based on the DC side voltage stability analysis. Finally, the effect of the DC side capacitance voltage two ripple on the load capacity of the single-phase PWM rectifier is discussed. The method of improving the carrying capacity by adjusting the ratio coefficient of the voltage outer ring is proposed. The simulation and the test results verify the correctness of the above theoretical analysis.

【作者单位】：国家电能变换与控制工程技术研究中心(湖南大学);长沙理工大学电气与信息工程学院;
【基金】：国家自然科学基金项目(51377051)~~
【分类号】：TM461

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